ADVANCED LIGO SUSPENSIONS DESIGN MEETING

CAL TECH PROTOTYPE QUADRUPLE PENDULUM SUSPENSION (ETM)
 
xxxWHITE BOARD and FACES available at: - http://131.215.114.242/view/index.shtml

REAL VNC: -   131.215.115.121 (under options request shared view) FREE DOWNLOAD AT: - http://www.realvnc.com/


1. AGENDA / DISCUSSION NOTES
  LINKED DOCUMENTS CAN ALSO BE FOUND AT    http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/
  FOR LINKS THAT NO LONGER WORK THE FILE HAS PROBABLY BEEN MOVED TO THE DCC.
 
MEETING AGENDAS CAN BE FOUND BELOW.

MEETING DM 056 *   SEPT 13th 2005 9am PT
* 2 meetings have been held since 15th of August and I will write them up when I get the chance!

There will be a design meeting on Tuesday at 9am PT or 5pm UK time.
AGENDA
CONTROLS

1) Quad update - Mark and Calum
         Update of assembly work
         Mark and Mohana would also like to discuss some issues related to the electronics
2) Visits - Tim and Russell
3) Other items?

NOISE
4) Option "F" - reference e-mail form Ken and Caroline
5) ECD layout for noise prototype - Ian
6) Drum ended wires - Ian, Calum, Justin
7) another agenda item for tomorrows metting would be to make people aware that i'm doing a RODA for the the chain separation option F.
8) I'd like to mention the aluminum paper at tomorrow's meeting

9)Other items?
Would you/Dennis like to discuss transfer functions with ANSYS some time? I think the response you got from ANSYS support was spot on in what it told you but you could maybe do with a little more background. Which version of ANSY are you running?  Justin
 

MEETING DM 055   AUGUST 15th 2005 8am PT
 There will be a design meeting on Monday. Again hopefully using VNC. We will still use the new telephone number and you still have to dial in!

COMMENTS
Janeen, Norna, Rich and Calum suspended the quad at Caltech. This build included the lessons learned from the first assembly with RAL two weeks ago and followed the 3 and 1 assembly specifications. Photos can be found at: -
 http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/quad_etm.html

Good news and bad news from second drum wire failing in the suspension. All of the stops worked successfully. As Janeen commented "nothing happened" From the sound and the initial observations look like we are having a failure that is related to the manufacturing process for this set.
To stop any more dealy, as per my e-mail, I would like to move drum ended wires back into a research mode and recommend the following design for the controls prototype. Calum

AGENDA
1) CONTROLS
       Alternative to drum ended wires: -
             Prototype pin and double clamp (cpad) (shows wire after pull test with recoil effect)
                      Break test - wire survived up to 190 kg in break test (3 times)    [cf. RAL tests on "clamp only" wire slipped at 85 to 100 kg]
                        Swing test  - before on the second and third runs I suspended the clamps under a load of 50 to 70 kg and allowed
                                            them to be moved  back and forth up to +/- 20 degrees.
             Designs for the top blade, D050329 and top mass, D040380
                                                                                                D040381
                                                                                                D040382
             Comments from Dennis Coyne
            
Calum,
Given the situation if a friction clamp can be retrofitted into the controls quad to permit the
 controls quad to be completed and delivered for further testing, then I'm all for it. Of course
in parallel, we should make the nail-ended, maraging wire work (a UK task?).
I have a few comments & questions on the design, in the attached file.
        Dennis

**How to incorporate into the wire jig, Ian Wilmut?**
            

2) NOISE
a)     RAL to propose Option F, Tim

b)  Upper Structure, 2nd (Stanford) structure, Tim and Calum
            FEA
            No gussets, change to bottom section and reduced tolerances on height etc ... (confirmation from Dennis, see below)

            Tim and I met with Mike Gerfen this morning to discuss the 2nd suspension structure that we are making for the Stanford tests.
            Mike and I are keen to apply the lessons learned from welding the 2st structure to the second structure.
            These include: -
            1) Making mitered corners in the bottom ring, as is done in the top ring! - OK!
            2) Removing some of the corner gussets? These proved difficult to include. *
                  * It turns out Tim had already been looking at this in ANSYS. We believe that by removing some of the gussets
                       we would only lower the 1st resonance by ~ 5%. Thoughts?

              DC: - A -5% reduction in the frequency (when f1 >~100 Hz) for significantly better manufacturability sounds like a
                  good trade to me. I suggest you proceed with this plan.

         On Friday we also spoke with Brian Lantz and Norna. The current plan is to send the 2nd structure to Stanford in 5 to 6 weeks.
          After tests at Stanford Caroline has requested the lower structure to help with layout tests with the CO2 laser system?

             DC: -  Layout/integration tests with the C02 laser sounds like an excellent use of the 2nd structure. More generally I'd say that
           after the Stanford testing on the ETF, we ship the 2nd structure to the UK and let the UK folk choose how they think it best to use.

c)     Catcher, Tim Hayler and Joe
           Slides from Tim and Joe
               - ADD comments from Russell and Calum!

Hi there,
a few quick comments for Joe regarding the slides:

page 3 - I am uncomfortable about the prospect of accessing a grub screw from the direction shown because of the close proximity of the fibres - goes against previous comments about exclusion zones. I'm also a bit unsure about the ability of  just one grub screw being able to prohibit movement of the clamp during transportation given the amount of mass in question.

page 4 and beyond- would like to hear more - I see that the assembly has been split to enable recommended disassembly condition that was a key feature in the GEO clamp design and that is important.
Looking ahead at the comment made in the first bullet point of the summary I disagree that the cross member in the structure is causing a problem with creating a more simple sliding design -  both clamping mechanisms used in the GEO Catcher operated with a similar cross member in place, and the solution were elegant.  The choice of the lever arm and press mechanism makes the disassembly process less elegant and straigfhtforwardt, although the mechanism could work well, and has clearly been well thought through. Are there plans to test the mechanism? What are the current thoughts on material selection issues - particularly in relation to the interface between the actuator shaft (presumably St. Steel) and the collar/bearing material?

Its a shame about the feedback on the concept of the actuators, that sounded like an interesting option. What about other concepts? Have you completely ruled out the use of cams?

thats all I have for now,
hope the comments are of use and shall look forward to hearing more about this in the Design Meeting,
regards, Russell.
AUGUST 1st 2005 8am PT
No Meeting!


MEETING DM 054   AUGUST 1st 2005 8am PT
 There will be a design meeting on Monday. Again hopefully using VNC. We will still use the new telephone number and you still have to dial in!
Design Meeting Monday at 8am PT (4pm UK time) AGENDA

1) CONTROLS
    Quad controls prototype build - an update
    Issues and re-works from first build
    Photos of the Build
    2nd mode-cleaner for LASTI
    Installation tooling
   Schedule for delivery to LASTI

2) NOISE
Drum ended wires research
ITM PEN REACTION MASS
CATCHER

3) OTHER
SolidWorks video cards
Birmingham OSEM on a triple MC
OSEMS for noise prototype UIM and PM?   
E-mail from Russell to Tim (Caroline, also had comments - no longer have access to that e-mail!) 

Hi Tim, a few initial comments to the file you sent round. The issue of how the clamping has been address in both cases, and I like the lever arm concept. Issues of access during operation and also the key issue of disassembly need to be addressed I think though. Disassembly clearly relates to the issues such as the mass of the lower structure (as non-suspended mass, in relation to internal modes of the structure etc.) and also how the functionality of the clamps relate to the issue of the safety stops. (Q: Do we have to replace one claming assembly with a more lightweight stop design?? For discussion.). The desk drawer like disassembly (i.e. from one direction, the front, and causing as little disturbance near the fibres as possible) was the key feature of the clamping mechanisms used in the GEO Catcher and I think it is crucial that this is not lost in the N-Ptype design - unless that disassembly step is deemed unnecessary. In terms of access, we should all discuss possible exclusion zones in terms of hands being near the fibres etc. - although this may be less of an issue in terms of the material that you have sent round, as I have only had a quick glance. Speak to you later, and I hope some of these comments are useful, cheers, Russell.

 
MEETING DM 053  20th JUNE 2005 8am PT
 
AGENDA

I. CONTROLS
Questions / comments form group on any key issues?                                                          - 5 minutes
       - follow up to wire jig query
       - Pictures / comments on the lower structure
       - E-mail's from Tim Hayler
Review of last week's actions         (possibly next week)                                                      - 5 minutes
         - reference below in red!   
Review of  Drawing Requirement slides and link to released document, E030350-A-D       - 10 minutes
       - Units, fasteners and archival of files.
SolidWorks and PDMWorks      (version and drawing / revision in PDMWorks)               - link and question only!

UPDATED UPPER STRUCTURE DRAWING, D040514-10                                         - reference only!

II. BLADE COMMITTEE MEETING
Reference e-mail / summary from Justin.                                                                             - 40 minutes
1. Stress limits in blades and in wires (see ideas in
http://www.ligo.caltech.edu/~janeen/E010613-01_Sys_Generic_Reqts.pdf    (Page 20)

2. The creep problem and the creak problem. Can we agree how to address them? (see comments in same document, page 21)

3. Material of wires and clamps (including sacrificial shims)

4. Use of drum-ended wires - advantages and problems (see comments in
http://www.ligo.caltech.edu/~janeen/T010103-04_Concpt_Design.pdf   appendix D)

5. Revisions to http://www.ligo.caltech.edu/docs/T/T040108-00.pdf (which will include many of the issues above)

6. One from Caroline/Geppo: blade tilt adjustment.

7. Reference E-mail form NAR re: alpha factor, 16th June 2005!


MEETING DM 052  13th JUNE 2005 8am PT
There will be a design meeting on Monday. Again hopefully using VNC. We will still use the new telephone number so I think you have to dial in!

AGENDA
I. CONTROLS
1.*Clamps and Wires for UI Stage*
       Test at RAL, Nov 2004 test at Caltech, Triple from a fixed top mass - Calum et al Caltech
2.  RODA from SYSTEMS Meeting
- Bring up again on NAR's return. Also Drum wires to SUS group and diameter of UI ETM wire.
3.  REMINDER: DES to SUS: - Two Drum Wires close together?

4. *MASS BUDGET: - Why when I look again does it come out to 110 kg?  (FEA and LSC budget ~130 kg)*
          Lower Structure  = 32 kg      (cf. LSC 50kg, I know Russell worked on reducing it but what did we use for FEA?)
          Ring = 8kg                      (cf. LSC OK!)
          Upper Structure   = 34 kg?    (cf. LSC 42kg, Tim, did we count the ring twice?)
          Top Stage = 30 kg          (cf. LSC OK!)
          Table Cloth   = 8 kg        (cf. LSC OK!)

5. *Upper Structure* Support from Tim, reference e-mail from CIT and review of DRAFT drawing for post machining,
     LIGO-D040514-09-DRAFT

6. Progress report by CIT, link to pictures.
7. Visits - Ian, Tim, Russell  (LASTI Schedule - updated Friday 10th June 2005!)
8. Weight of UI and Top masses in SW versus as built from the lab.- possibly next week!
            TOP MASS: - LAB 21.6 kg (including +500 and x2 ECD's)    - TBC Calum!
                                    SW 22.1kg (with density of SSTL 7900)           - TBC MPL!
                                    BLADES 22 kg

            UI MASS: - LAB 21.7 kg and 21.4 kg                  - TBC Calum!
                                 SW 21.8.kg (including re-works and density of SSTL 7900)      - TBC MPL!
                                 BLADES 22 kg

9.  MPL - Quad SUS numbers! Reference e-mail from MPL
10. DCC Design and System Requirements - update for Justin, MPL and others

II. NOISE
1. Eddy Current Dampers - Ian
2. Lower Structure Assembly - Tim 
3. E-mail from CIT re: How to exchange files with RAL and SolidWorks / PDMWorks at RAL

III. REVIEW - Comments and suggestions?

IV. OTHER ITEMS    - Other items?

Blade clamps, vertical adjustment  - Geppo's clamp! Russell on holiday so discuss in detail next week!

NOTES: -    The Web page for the DRR Update (on Wednesday at 9am) can be found at www.ligo.caltech.edu/~janeen/
                    Updated link, photos following the quad build @  http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/quad_etm.html
                    Blade meeting, next week?

MEETING DM 051  6th JUNE 2005 8am PT
There will be a design meeting on Monday. Again hopefully using VNC. We will still use the new telephone number so I think you have to dial in!
AGENDA
I. CONTROLS
1. Upper Intermediate Wires
    Drum wires?
    Modification to existing wire clamps? (Idea from Alastair Grant)  UI Mass wire clamp and Middle blade wire clamp
2. Drum Wire Research, reference
       E-mail from Justin, comments on drum ended wires
       Draft write up from Calum: LIGO: T050049-01
       Request for model with thicker wires - Norna
SUS: 2 drum wires together? (wait for NAR's return)
3. CIET's visit to Glasgow  (memory of a wire? Geppo / MPL)   (Straight lengths of wire?)
4.  Lower structure parts - CIET and RAJ. Via VNC.
5. Other topics?
        Visits to Caltech and the UK.
                Tim - sorry I don't have a clear idea yet of when the upper structure will be ready!

II. NOISE  (note also reference Norna's new Conceptual design re. drum and wire clamps from MIT!)
1.  Proposal of suspension adjustment for Advanced LIGO quadruple suspension.pdf
2. Top Mass - Ian Wilmut
3. Play suspension with spare parts - Ian Wilmut - more to follow.

III. DESIGN MEETINGS
Review. We have now had 51 design meetings over the last 18 months or so. I have found them useful, although I am slightly biased. I would like to gather comments from people on where they think these meetings should go, how useful they are, how often they should be etc .. etc ...
Thanks Calum


MEETING DM 050  23rd MAY 2005 8am PT
There will be a design meeting on Monday. Again hopefully using VNC. We will still use rain dance. So please call in to the usual number.
Agenda
1) Upper structure - latest update and review of analysis and photos of tests
2) Lower structure - update
3) Lab update - Norna, Janeen, Helena, Calum and Ian. 2 triple pendulum chains from a fixed top stage.
http://131.215.114.242/view/index.shtml
4) Re-works, mistakes, parts to shops and drawings to be finished
5) CAD - Pro Engineer and SolidWorks
       Examples from Calum and others
       Discussion on whether or not these are exclusive to the c-ptype or will continue to haunt us in the future!

I will update the web page and arrange the links an hour before the meeting.
Cheers, Calum

MEETING DM 049  16th MAY 2005 8am PT

Plan to use VNC for today's meeting. It can be downloaded, for free, at http://www.realvnc.com/
    (IP ADDRESS: 131.215.115.121, remember to change settings so as not to disconnect others! Password on request!)  

1) UPPER STRUCTURE WORK - discussion, reference e-mails from Calum

2) LOWER STRUCTURE QUESTION FROM ATLEE FOR RUSSELL?

3) REVIEW OF DESIGN / DRAWINGS FOR: -
    LOWER STRUCTURE SPACERS
    RING
    "DUMMY" TABLECLOTH
    OTHER LOWER STRUCTURE PARTS

4) E-STOPS and TEST MASSES and BETWEEN THE CHAINS?

 5) OTHER ITEMS?


MEETING DM 048  12th MAY 2005

SOLIDWORKS 2005 and PDMWorks 2005 - MPL and CIET

AGENDA

Plan to use VNC for today's meeting. It can be downloaded, for free, at http://www.realvnc.com/
    (IP ADDRESS: 131.215.115.121, remember to change settings so as not to disconnect others! Password on request!)  

1) OVERALL ASSEMBLY, D040401
       Range of 28mm and position of range from the seismic table

UPPER STRUCTURE DRAWINGS - need dimensions / tolerances added for upper strucutre top assembly for final machining!
                                                          - sub assembly of just view for weld / dip brazing!
             - Request beyond controls effort which is essentially finished!

2) DRAWINGS FOR WORKSHOP
       RING ASSEMBLY, TD-1039-410, - Tim
       DUMMY TABLE CLOTH, , - Janeen
       LOWER STRUCTURE PARTS, see list below, - Russell and Calum

3) Other items
    Paper on "memory" of spring steel wire - Mike Plissi?
    Paper on Quad build / assembly / damping?
    SolidWorks 2005 and PDMWorks 2005 - Software upgrade (May 22nd 2005) and tutorials
    Visits to Caltech - Ian and Norna

4) Noise Prototype
       metal masses, blades (alpha and int mode) and option E in reaction chain choice?
      Ttraffic light grading of c-ptype drawings, at the sub-assembly level! When would this be useful for RAL effort

 5) SCHEDULE OF WORK LEFT, COSTS AND DELIVERY TO LASTI
        Controls prototype work now down to ~ 8 items and these have been added to a schedule - TBC
        Gathering quotes (on the big ticket items) so we can compare them to estimated costs and monies spent - TBC
        Schedule for LASTI has been updated and predicts September 30th delivery
Driven by upper structure now taking 6-7 weeks from today and completion of critical sus items by 15th May 2005.

6) STEP / SOLIDWORKS / PRO-ENGINERR - Did we really know what we were doing?
       Examples from Calum and others
       Discussion on whether or not these are exculisve to the c-ptype or will continue to haunt us in the future!

MEETING DM 047  3rd MAY 2005

AGENDA
1) UPPER STRUCTURE - Tim / Calum
        Full penetration welding didn't work! Moving to dip brazing. One Upper Structure now ready mid-June.<> Mike G needs updated upper structure drawings, TD-1039-401, for 22nd May 2005 specifications for machining called out including flatness, parallel and perpendicular and square call outs. - Tim

2) RING and Structure drawings for 487 & 489: - ASSEMBLY TD-1039-410  - Tim / Calum / Russell
        Have drawings & design that require discussion and completion (need by 15th May at the latest)

3) LOWER STRUCTURE (e-drawing) -  Questions for Russell from Calum
2 sets of drawings to complete the assembly  (first set in shop, estimate second set ready by end of the week)
and quotes for the inner and outer face plates drawings, D050090-A and D050035-A, questions for Russell / Janeen?
comments from Dennis

4) SCHEDULE OF WORK LEFT, COSTS AND DELIVERY TO LASTI
        Controls prototype work now down to ~ 8 items and these have been added to a schedule - TBC
        Gathering quotes (on the big ticket items) so we can compare them to estimated costs and monies spent - TBC
        Schedule for LASTI has been updated and predicts September 31st delivery
Driven by upper structure now taking 6-7 weeks from today and completion of critical sus items by 15th May 2005.


5) TOOLING / BLADES etc ... - Ian / Calum
        Schedule a time to hand over work and arrange for visit

6) VISIST to Caltech? Ian (Mid May) then Tim (mid June) Norna (1 day in May and 2 days in late June?) Others?


7) DCC DOCUMENTS - MPL / Norna   (also ask about PDMWorks tutorial? and SW 2005 SP 3.0)

8) ITEMS FROM LAST WEEK?


MEETING DM 046 APRIL 25th 2005
AGENDA
1. 258 with 401 - Connect? and 258 with 401 alignment?

2. LOWER STRUCTURE ASSEMBLY ON THE VAULT - Discuss?
In 131.215.115.22
SUSPENSION / CPTYPE ETM / 03 STRUCTURE / LOWER STRUCTURE / 
    D040516_ETM_assembly_lower_structure_assembly-rig.sldasm (Rev 07)
LINK: E-drawing of D040516 with and without bolted on connections

3. SILICA
ETM Quad Silica test mass drawing - Janeen
Interference of pen wire with pen mass, with MATLAB numbers - MPL
Assembly with Silica - CIET
Parameters for Silica - Norna
Drum ended wires - discussion with Caroline about possibly inclusion in ear design? - DONE CIET!
Drawings and vault access?

4. DCN TOP MASS
Comments to MPL and DCN to Norna
1) ECD - what if they were lighter?, 2) SW files - should we also put them on the DCC?,
3) magnet arms change to counter bore? 4) excel version of drawing tree and bill of materials?

5. INTERFACE RING LINK to BOX RING
    MANUFACTURE,    DIMENSIONS,     LIGHTWEIGHT,     INTERFACE

6. OTHER ITEMS?
Mike Plissi e-mail's on wire
Norna - Amaldi poster / abstract - comments?
Lower structure update - Calum
Step files and what do I have what does Ian think I have? (Ian Wilmut and Calum to arrange meeting?)
Visits to Caltech who and when? ( May and June)
LIGO Movie files - Oddvar, Ken and Calum
SolidWorks 2005 version 3.0 - upgrade?
<>MEETING DM 045 APRIL 18th 2005
<>
<>was hoping to talk about PDMWorks (with Oddvar et al) but I think I am going to have to postpone the discussion for a week.
<>We were also hoping to discuss blades with Mike Plissi, I think this should be kept to a minimum based on the following new agenda.
<>Perhaps we could also delay this for a week or if Justin and Mike are both available we could start 10 minutes early to discuss "alpha for blades and Calum's question for Mike"
<>
<> D040524.htm
<>
<> 1) Upper Structure <>
  • Welding cannot proceed until we receive the plate that interfaces with the legs 454 and 490 (Tim). This plate interfaces with the table cloth (Janeen) and is the first part of the welding process (reference e-mail by Janeen on Friday 11th of February)
  • The suspension does not mate with the structure, Calum believe part 401 needs to be modified to host assembly 258 (Tim and Ian)
  • Parts 401 (structure) and 258 (top stage) have un-recognized holes and no clear way to interface. Machining of these parts has stopped (Ian)
  • ~ 6 parts including the ring have still to be completed / transferred

    • <> 2) Lower structure <>
  • Manufacture of the face plates, there are 2 type and 2 flavours of one type could take 8 weeks. - Not as bad as it sounds as we never expected to have this for the first Caltech build in May!
  • Drawings from Russell are with Janeen / Calum for review
  • Bolted on section will be drawn and made later
  • interface issues exist between the ring and the lower structure. After a meeting on Thursday with Russell and Calum Tim has an action to look again at the ring.
    • 3) Tablecloth <>
  • Drawings are with Calum for review. Interface with top mass and structure is the key (MPL and Tim)
    • Interface Wrt Structure and welded plates?
    • Part D040387 should be modified to counter boar holes?
    • e-stops / support during assembly
    • tablecloth brackets that interface with the the welded plates and tablecloth

    • <>I guess it will be fairly technical, however it is needed as if unresolved these items could lead to large delays (as stated above some already are).
    <>
    <>

    <>MEETING DM 044 APRIL 11th 2005
    <>
    There are 3 items for the agenda: -

    <>
    1) Drum ended wires, experiments and proposed plans, see attached.
    2) Top Mass PDS and Summary of design for both controls and noise including amoung other things incorporating drum ended wires and clamps for the suspended osems?
    3) Blade data- JG
            what does this mean for the for controls prototype?
            do we need to gather any more data?
            What would you do if you designed them with this data in mind?
            Do they need to be modified for drum ended wires and changed mass?

    <>
    Justin and Mike can you send round the documents to folks on this list as I will out tomorrow Friday.

    <>
    <>

    <>
    <> MEETING DM 043 APRIL 4th 2005
    <>
    <>I think as the design of the controls prototype comes to a end the format of the Monday meetings will change. It will I think become an available slot for required discussions. For example a week on Monday the discussion will centre around the blade data and Mike's PDS on the Top Mass. This Monday I would like to talk about the following with amoung others Russell and Ian.
    <>
    <> Monday 4th April 8am PT
    <> <>
  • Russell - lower structure drawings (outer and inner, inner have two flavours)
  • Ian - tooling and reference to extract to the task summary, "what and when?"
  • Quad and LSC - update from Calum and others
    • <>
  • lower structure
  • drum ended wires

    • <><><>

  • "3and1" assembly tooling
    • <>
  • table top arrangement


    • <><><>

  • changes to the ring (Tim via e-mail)
    • <>
  • reference e-mail from Russell / MPL to Tim

    • <><><>

    • NEXT WEEK: -
    <>
    <> Monday 11th April 8am PT
    <> <>
  • Blade data - Maraging round table
      • http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/TEMP-LINK/
    • Drum ended wires - plan (CIET)
    • Top Mass - DCN & PDS (MPL)

    No meeting 21st or 30th of March 2005
    MEETING 14th March 2005
    add agenda
    MEETING DM 042 MARCH 7th 2005
    AGENDA

    1) TIM HAYLER - Upper Structure part drawings
    2) IAN WILMUT - Selecting a blade spring and applying it to the blade data
    3) MIKE PERREUR-LLOYD - FEA of the overall structure and overall assembly on PDMWorks, with glass?
    4) CAROLINE - Glass drawings for silica - YES on the vault
    5) CALUM TORRIE - A Triple ETM Suspension from a fixed Top Mass.
    Russell and I (with Norna and Janeen) stepped through the 3 and 1 assembly procedure
    Russell and I attempted a triple from a fixed top mass with blades etc .. Observations: -
    Wires and wire clamps?
    Position of Centre of mass of the UI Mass, assembly?
    Real Estate issues around position of Pend wire at UI mass?
    Remember didn't have wire jigs, we picked blade springs at hand and their subsequent alignment and choice of clamps was not ideal
    Would like to goto the  lab (for 30 minutes) and discuss at the end of this meeting. Mike, Russell and I had a similar and v. useful chat on Friday.
    & ACTIONS FROM LAST WEEK and AGENDA for NEXT Week
    ACTION: Table Clamp design
    ACTION: Ian wilmut's priority list
    NEXT WEEK: Russell Jones', 2 weeks at Caltech


    MEETING DM 041 Feb 28th 2005

    ACTIONS from LAST WEEK
    idea by CIET
    I.  Justin Greenhalgh: - Justin to look at  LIGO-T030278-05, pages 21 and 22, to consider optimizing clamp design. Remember ledge is 1" high.

    II.  All: - Welding issue wrt to the Interface of the Top Stage with the SEI and SUS  - Suggestion

    III. Tim Hayler: - Piece part drawings to Workshop via Calum

    IV:  Ian Wilmut: - Top Stage interface, see presentation below


    AGENDA

    1) RUSSELL JONES: "A CONUNDRUM OF NUMBERS"

    2) IAN WILMUT and TIM HAYLER: Tim -  "A VIEW FROM THE TOP STAGE"

    Justin -
    Herewith one part of the slides re cross-sections; a sketch showing what
    we analysed. Ian will send more stuff presently.
    The bolt calculation depends on the number of bolts but if, for example,
    there are just two 1/4" bolts holding the interface plate on, then each
    will see limit-case shear of around

    Load/area = 600N/(2*pi*2.5^2)

    (assuming 5mm root diameter and 60kg load each end of the top stage),
    which is around 15 MPa - probably smaller than the preload stresses you will
    introduce just in tightening the bolt up.

    Speak to you later - Justin.

    PS Norna, when you did your calculations of nominal stress in the wires,
    did you allow for the slope of the wires which will somewhat increase
    the wire tensions?

    ** Ian you mentioned drawing, Ian -  D040561, I don't seem to have any record of this?


    3) MPL / CIET: "FEA - RECENT IDEAS APPLIED TO THE OVERALL STRUCTURE"
    See AVI's  on my webpage - maybe you've made further alterations to the structure since these were done?
    http://www.physics.gla.ac.uk/~mplloyd/ALIGO/

    1. 1st Mode of Structure including plates scabbed on Top Structure
    2. 1st Mode of Structure including plates and X-beam on Top Structure
    3. 1st Mode of structure including plates, X and diagonals on Lower Structure (101Hz)
    4. 1st Mode of structure including plates, X and diagonals on Lower Structure (101Hz) [STRAIN]
    5. 2nd Mode of structure including plates, X and diagonals on Lower Structure (110Hz)
    6. 2nd Mode of structure including plates, X and diagonals on Lower Structure (110Hz) [STRAIN]


    4) Other items including a follow up discussion on the upgrades to Initial LIGO suspensions

    5) VISITS

    Ian, Justin, Janeen and I met to discuss RAL effort for the CPTYPE and Ian's upcoming visits to Caltech.
    We agreed that Ian would visit Caltech the week before the LSC (March 13th to March 20th) and for 2 weeks May (2nd May to the 13th May).
    Ian will support the effort to ensure the visit is worthwhile for everyone.
    It was also suggested that Ian inform the DES team of his availability between now and the 14th of March several days ahead of time.
    With the support of IW, CIET is confident that all of the parts will be available on or before the 15th of March (information includes updates from both the Physics Shop and Valley Precision).
    Janeen has been looking into the possibility of getting of getting some of the part shipped to RAL for critique and assembly, ongoing.
    Ian will also be available the week of the 4th and the week of the 25th of April for teleconferences.

    Priority List: -
    i)  Check Piece part drawings for the upper structures and answer question on suggestion for interface! - 25th Feb 2005
    ii)  Prepare sketches for DES highlighting design, interface and work done on the Top Stage and its interface to the structure. - 28th
    iii)  Modifications to the Blade Transport unit and the updated wire clamp for the BTF - Drawings to Caltech - 28th Feb 2005
    iv)  Modifications to the Wire Jig Drawings - 3rd March 2005
    v) Blade Data - to recommended pairs of blades and angles of clamps - 3rd March 2005
            http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/IW/ version T040229-08
    vi) Top Stage DCN? Check list of question wrt design - 5th March 2005
    vii) Assemble parts (sent by Janeen) from VP ahead of March 14th visit - 14th March

    After the meeting I remembered one other item that we are missing. A safety guard for the Wire Jigs. Ian - you mentioned 2 weeks ago that this was still to be done? This is needed immediately. Could this be made at RAL?

    A full list of the work to be done by RAL (in particular Ian) in support of the controls prototype can be found in this extract from Calum's Task summary. This is up to date as of 23 Feb 2005. 
    http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/CIT/ExtractfromT040016-12.pdf

    ** Highlight blade numbers**  **and what I have from Ian**


    6)     UPPER STRUCTURE NOTES - STILL TO BE UPDATED!

    Here is a list of notes and actions from Wednesday's meeting
    1) ACTION: - Drawings to Janeen and Mike G (in their current state - Calum - DONE!
    NOTE: - Concerned about Interface with suspension and the block that the blades mount to - Discuss at DES Meeting!
    NOTE: - The gussets can be machined after welding!
    NOTE: - The ledge will be bolted on in 4 sections (1" x1")
    2) ACTION: - Dog Clamps need to be updated for 1" ledge size - CIET (Would like to look at optimising design, talk to Justin)
    ACTION: - How to weld on pads - Janeen - DONE! (see next item) 
    3) ACTION: -  Weld pads should be changed to rectangular blocks and mounted as per the instruction from Janeen's e-mail 11th Feb 2005 - Tim
    4) ACTION: - Use N60 inserts in all locations, update drawing to reflect this - Tim
    NOTE: - Can add chamfer to gussets
    NOTE: - Discussed number of bolt locations on removable cross sections and were happy at 4 1/2-13 in each corner
    5) ACTION: - Piece part drawings need to be updated: - (TIM)
    Vertical legs with slots for welded pads
    Need drawing for both long and short top members as well as long and short bottom member
    Need drawing for both cross sections
    6) ACTION - Process spec for welding - Janeen
    7) ACTION: - Need drawing of "dummy" tablecloth and top stage - Tim (with support from Calum) ?
    NOTE: - Mike G has ordered material and will start cutting sections
    8) ACTION: - Need updated drawings before major work on both structures can begin - TIM
    ALL - Please let me know if I missed any?
    I think we should meet again in a similar format later this week when the drawings have been updated?



    MEETING DM 040 Feb 21st 2005             PRESIDENTS DAY Plan is to have  meeting as it is  not a UK holiday and it is the overlap day for MPL and Russell Jones)

    1) Ian Wilmut - Top Stage Interface with structure (and Tim Hayler). It was requested that Ian prepare a few slides that highlighted the existing design, FEA work done and addresses the concerns raised. This will all be used to allow for the successful interface of the suspension to the structure. 
    Top Stage to Upper Structure
                &    FE work on top stage blade cartridge

    2) Russell Jones - 28mm! The range required between the upper and lower structures. Link to Monolithic Workshop in Glasgow

    3) Tim Hayler - Upper Structure drawings - reference action list from last week and comments / suggestions form last weeks meeting.
            Suggestions: - I) thicken up lower structure at the position of the pen mass
                                  II) Try "scabbing" on plates at the corners next to the interface with seismic table and fill in slots at this location
                                  III) Compare the addition of crossed removable sections on the upper structure
            Action List: -   http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/quad_etm_setup_page2.html    
                              
    4) MPL / CIET - Update on upper structure FEA and info supplied for coupled work

    It should be noted that Caltech workshop have not yet started the structure as they are waiting for the piece part drawings and feel that cutting the material to length will not take much time.

    Recent pictures of the quad build: -

    http://www.ligo.caltech.edu/~ctorrie/pictures/quadfeb2005/Quadfeb2005.html

    http://www.ligo.caltech.edu/~ctorrie/pictures/quad17feb2005/Quad17feb2005.html

    MEETING DM 039 Feb 14th 2005

    1) Update of Structure work
    SUMMARY: -
    • Ex 1: -  Last Week we started with an overall structure (121 kg) that had a 1st mode = 99 Hz.
    • Ex. 2: - We had a wider (+ 30mm) lower structure with a heavier /longer box ring and for the overall structure (133 kg) 1st mode = 85 Hz. *
      * Remember that it was the box of the lower structure that increased by + 30mm (315mm to 345mm)  and that the angled section still had to stay within the same outside footprint. The main reason for increasing the size of the box was to improve access for the laser welding!
    • Both of these examples above were clamped in 14 locations in both translation and rotation. 
    • This week, we looked at changing the clamping in example 2  to being clamped in translation only. The 1st mode = 85 Hz.
    • We also looked at example 2 with the original lower structure (only change was heavier box ring), 1st mode = 97 Hz
    • And example 2 with lighter box ring and wider lower structure, 1st mode = 82 Hz
    • We are working on an overall structure with more realistic angled stiffeners  1st  mode =  TBD (in progress) 
    NOTE: - It is believed that the number of elements and nodes were within an acceptable range in all of these examples

    EXAMPLE (all of these can be downloaded prior to the meeting from this zip file):  -
    The following data is taken from example 2. The 1st mode = 85 Hz and the 2nd mode = 95 Hz.

    Other work: - 
    An Algor mesh and an UNV file (of example 2) have been created for Dennis' coupled analysis. 
         LINK: - /home/ctorrie/ALGOR 2005 in 10FEB2005_PM
    A comparative analysis in Algor is currently running (need to clarify one item with Algor support)
     

    2) Dennis Coyne - coupled analysis (structure + seismic)
               LINK TO SYSTEMS MEETING

    3) Ian Wilmut - Top stage and the interface to the suspension / structure

    4) Other items

    5) Re: Upper Structure notes
    Here is a list of notes and actions from Wednesday's meeting
    1) ACTION: - Drawings to Janeen and Mike G (in their current state - Calum - DONE!
    NOTE: - Concerned about Interface with suspension and the block that the blades mount to - Discuss at DES Meeting!
    NOTE: - The gussets can be machined after welding!
    NOTE: - The ledge will be bolted on in 4 sections (1" x1")
    2) ACTION: - Dog Clamps need to be updated for 1" ledge size - CIET (Would like to look at optimising design, talk to Justin)
    ACTION: - How to weld on pads - Janeen - DONE! (see next item) 
    3) ACTION: -  Weld pads should be changed to rectangular blocks and mounted as per the instruction from Janeen's e-mail 11th Feb 2005 - Tim
    4) ACTION: - Use N60 inserts in all locations, update drawing to reflect this - Tim
    NOTE: - Can add chamfer to gussets
    NOTE: - Discussed number of bolt locations on removable cross sections and were happy at 4 1/2-13 in each corner
    5) ACTION: - Piece part drawings need to be updated: - (TIM)
    Vertical legs with slots for welded pads
    Need drawing for both long and short top members as well as long and short bottom member
    Need drawing for both cross sections
    6) ACTION - Process spec for welding - Janeen
    7) ACTION: - Need drawing of "dummy" tablecloth and top stage - Tim (with support from Calum) ?
    NOTE: - Mike G has ordered material and will start cutting sections
    8) ACTION: - Need updated drawings before major work on both structures can begin - TIM
    ALL - Please let me know if I missed any?
    I think we should meet again in a similar format later this week when the drawings have been updated?

    6) WEB PAGE WITH FEBRUARY WORK IN PICTURES (TO DO)


     
     

    MEETING DM 038 Feb 7th 2005


    AGENDA
    1)  Structure Summary:  PROPOSED ETM C-PTYPE ETM STRUCTURE. 
    Request for material and
    ** Structure Summary** 

    - Talk by Tim on upper structure (history)

    - Talk by Russell Jones, lower structure

    TO DO list: - Ring size, width of lower structure, added stiffening plates and gussets, stiffen areas around diagonal cross sections


    2) Blade Data recommendations. Recommendations and Outcome from RAL / Cal tech Video Conference last week.

    - Propose to continue Cal tech data collection at 9am PT (today) with Ian on joining us as per last week.
    -  View of BTF at Cal tech


    3) Hardware reminder! 

    4) Other items. Software. SolidWorks 2004 with ANSYS 9.0

    MEETING DM 037 Monday 31st January 2005: Martin Luther King day

    Meeting held at Cal tech after Glasgow workshop, update notes from ab book - TO DO!

    ACTION (Deadline 4th Feb 2005*): - Ian Wilmut to provide drawings of the wire jigs (with internal review) 
        * Based on discussion with Ian, CIET has prepared a salesman to review these drawings on 4th Feb 2005.     ACTION: - Ian wilmut to provide look up tables for blade clamps (once checked blade clamps can be used) that allow for correction to flat posisiton and +/- mm adjustment

    ACTION - CIET to release drawing of drum ended wire  - DONE!

    ACTION: - CIET to order drum ended wire parts for C-PTYPE - In hand and will be done once DC & MB have signed. At present plan is to order 6 for the top stage and to request information related to ordering for the lower (longer & thinner) stages    !

    MEETING DM 036 Monday 24th January 2005

    Design Meeting held in Glasgow. Add notes, reference workshop notes! TO DO!

    ACTION: - CIET to supply prices of blades for Justin  - have in draft form!
    ACTION: - CIET to find out about safety stops on mirrors - have e-mail from Peter F and info from Gari 

    - Other actions can be found in Workshop Notes by CAC.

    MEETING DM 035 Monday 17th January 2005: Martin Luther King day

    AGENDA
    1)  Structure: -  Upper; Lower; combined; wrt tablecloth. 
                    Drawings of Upper from Tim and Joe2) Parts to Workshop. (IW - D040595? D040590? need idea of when wire jigs and other items are coming and need drawing and material list as using outside shop!
    3) Dennis Coyne's document on QUAD INTERFACE ISSUES, review!
    4) comments from SEI review?
    5) Names on documents - Linda working on it, the more info the better? Anyone know of any documents with issues on names?
    6) BLADE data -  Need to review work don so far and work out what still needs to be done?
                                     A. HA & BT (deflection etc using BTF)   B. HA (bounce frequency)   C. MB (measuring internal mode)                                  D. Caroline & Norna (Internal modes)     E. R de Salvo (rolling vs grinding?)  F. MPL Internal mode of larger blade?
           A.  Deflection data 
           B.D040298-009  59 osc.@ minute:  D040297-005  70 osc.@ minute;  D040296-008 75 osc.@ minute, under flat load!
           C. Bottom blade - the resonance was 105 Hz. If that's still not close enough to 114 Hz
           D. Insert reference to e-mails!
    MEETING DM 034 Monday 10th January 2005
       Copy and paste notes from MPL from Monday!
    MEETING DM 034 Monday 20th December 2004
       Copy and paste notes from meeting hosted from Glasgow!
    MEETING DM 033 Monday 13th December 2004 http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/quad_etm_setup_page2.html1) Parts to Workshop (20 drawings to Caltech workshops on 10th December from Glasgow, Caltech and RAL) ...2) Upper Structure, see attachment3) Top blade wire clamps, see attachment


    Other work hopefully to shop this week!
    Rest of UI mass drawings due this week
    Top blade wire clamp
    Top Stage
    Blade cartridge
    Eddy Current Dampers, copper section 
    Wire jigs
    Tablecloth
    upper structure
     http://www.ligo.caltech.edu/SUS.html


    UPCOMING MEETINGS: -
    20th December -  meeting is on. From University of Glasgow.
    27th December - no meeting
    3rd January - no meeting
    10th January - meeting


    MEETING DM 032    Monday 6th December 2004  08:00am PT
     
    • Quad Interface Issues - reference document by Dennis 
    Drum end wires
    goals for structure
    flexibility 
    • Lower Structure - Russell taking Tim's concept and applying the required assembly 
    • Quad at Caltech - assembly 
    • Upper Structure FEA - towards 200 Hz in ANSYS - Calum 
    • Masses etc .. to Glasgow - Russell 
    • UI Mass - follow up to MPL's review 
    • Blade Wire Clamps
    QUAD
    quad at caltech-00.jpg
    http://131.215.114.242/view/index.shtml
    MEETING DM 031    Monday 29th November 2004  08:00am PT

    1) UI MASS, MPL's work at Caltech
    http://www.physics.gla.ac.uk/~mplloyd/ALIGO/LIGOstartpage.html
                 "ALL, Attached is a link to my webpage where, under ETM - 29th November 2004 - you'll find and edrawing (and HTML edrawing)
                    link, MPL"

    2)   STRUCTURE 
                  Upper inc "do to" list
                  Lower inc UI str
                  FEA

    3) 

    NAMES on REPORTS. Interanl reports becoming more and more important. Default list or up to each individual to ensure local and collaborating names make it to
            the report?     Linda /  DCC folks can fix already published documents with the DCC by e-maill (even without the document)

    4) E-mail lists from 26th Nov 2004
      Top Stage Review, rev notes 01
            Wire Jigs, Wire Clamps and Wire, rev notes 00
            Comments on Upper Strucutre, notes rev 01


    MEETING DM 030    Monday 22nd November 2004  08:00am PT

    Agenda1) Upper Structure - Tim, Joe, Calum and Ian2) Lower Structure - Russell, Tim3) Blade wire clamps and blade clamps - NEXT WEEK!        i) tolerance on diameter? - 20 microns        ii) maraging steel wire? - www.maraging.com        iii) tolerance on mating blade clamps? - ask VirgionioFREE DOWNLOAD OF VNC AT: - http://www.realvnc.com/


    NEXT WEEK
    1) Drum end wire and wire clamps
    2) UI Mass and strucutre
    3) MPL's visit to Caltech, top mass etc ...

    MEETING DM 029     Tues 16th November 2004  09:20am PT

    Agenda
    1) Structures - TH, RAJ + CIT
    2) UI Mass - MPL
    3) Top Stage - IW


    MEETING DM 028     Thursday 11th November 2004  08:00am PT

    1) Review of Task Summary, LIGO-T040016-11

    2)      a)  Latest E-drawing of overall assembly, LIGO-D040401-06, including wires.
     

    b) Overall Assembly design guidelines to ease exchange between SW and PRO-E. Draft at: -
    http://www.ligo.caltech.edu/~ctorrie/SW/Hints.html
    Also being exchanging . joined parts, shrink wrapped parts, STEP files with planes and assemblies that come through as parts (both SW and STEP)


    3) December visits to Caltech

    4) Structure update - perhaps tomorrow at 8am with JHR, Tim, Russell, Mike and Calum?

    MEETING DM 027     Monday 1st November 2004  8:00am PT

    1) Blade wire clamps with a 1mm wire (rod). Ideas from VIRGO. Thanks Virginio.                  1mm wire (rod) in a small GEO style clamp - IW
                      1mm rod with welded or machined sections on each end - VS
                      3mm rod with half caps - VS

    2) A. Lower Truss arrangement (Tim and Calum) Extra mass could be afforded.
                     Analysis from Tim using beams and shells. First Resonance 49 Hz                     The modes on the structure are the bottom cylinder flexing, can this cylinder be made into a hexagon to prevent this?  Tim


                     Containment Truss (design by DC) FEA by Calum. First Resonance 68 Hz.
                          - Need to add extended section.

         B. Overall Structure FEA using ANSYS Workbench.  Tidied up structure with non-suspended mass = 140 kg (MPL and CIT) 
              1st Resonance ~ 70 Hz Truss moving. 4th resonance of ~ 130 Hz involves overall structure moving.
               Implies mass available to stiffen up lower section to aid in getting 1st resonance above ~ 100 Hz.

    3) Building a Quad at http://131.215.114.242/view/index.shtml

    4) OVERALL ASSEMBLY (Files also on vault search for LIGO-D040400). - LINK TO *UPDATED* ETM OVERALL ASSEMBLY FILES
            Discussion on co-ordinates, sub-assembly layouts etc ...    E-DRAWING OF OVERALL ASSEMBLY, D040400
    Calum Torrie and Mike Perreur-Lloyd

    MEETING DM 026     Monday October 25th  8:00am PT

    1) RAL's work on the controls prototype (I Wilmut)2) Split of work associated with the Structure (including support from Tim Hayler)  - NEXT WEEK!         Russell Jones and the catcher. CIT to send GEO Catcher to Glasgow.4) Plans for reviewing the Task Summary. Individual summaries, distribution of updated version by C Torrie  including review of sections and updated section to include effort by Tim Hayler..


    5) Area's we use Ceramabond / Vac Seal. Question from Helena? Want to replace with cold wleding.
     6) Clamps or connectors. C Torrie / MPL & T Hayler had tour of 40m and discussed ideas for clamps - ACTION C Torrie

    7) Extending the suspension model to 6 stages.  MATLAB, MATHMATICA or Matt Husman? other?
     NEXT WEEK: - REVIEW OF TASK SUMMARY    & Tim's work will be discussed next week 

    MEETING DM 025     Monday October 18th  8:00am PT

    1. D040400 - OVERALL ASSEMBLY of QUAD ETM (E-drawing)  - UPDATE! 
    E-DRAWING (need information from this picture to add floor, LIGO man/woman etc...) and PICTURE from the SITE
    TO DO: C Torrie
    2. Useful linked from Dennis Coyne. Optical Layout for Advanced LIGO: - 
    http://www.ligo.caltech.edu/docs/T/T010076-01.pdf
    One of the opto-mechanical layout drawings for the core optics in initial LIGO is available here: 
    http://www.ligo.caltech.edu/docs/D/D970610-A.pdf
    3. Drawing Guidelines - add attachment (reference copy sent in the e-mail for the meeting notice
    TO DO: C Torrie

    4. MPL visit to RAL  Blade deflection, Flattening of blades, adjustment of blades. MPL has supplied a set of photographs
    5. Catcher       V blocks, extended structure / catcher   - NEXT WEEK!

    6. CIT, JHR and TH - Structures at Caltech. Questions for structure concepts: 1) Access to Top satge and tablecloth etc ... 2) effect with added mass. Then consider assembly / manufacture technique. In order to cover #2 need to create more realistic rep of non-suspended mass. IW provided a .STEP file of a simplied top stage. CIT working on simplified tablecloth and osems. 

    7. UK Monthly meeting - any comments? 

    MEETING DM 024     Monday October 11th  8:00am PT
     
    1. Russell Jones: - Cover for glass optics has effect of design of V-block + electrostatic face mask, D040146 
                                  ACTION (RJ): - Compromise of 3/4" RdeJ to JHR! GEO Style!
    Catcher discussions on Friday with JHR, CIT and TH
    2. Blade Clamp drawings from I Wilmut, question from CIT. 
    ACTION (IW): - Ian to e-mail information on quantity 
    3. Helena Armandula - Glue for Magnets? &   Questions on the Electrostatic face mask 
                                          413-A Ceramabond                               Flux free solder with aluminium foil to clean the tip 
    4. Tim Hayler -  Summary of Work 
          Idea for implementing the "3&1" assembly with the mounting concepts. 
           FEA of Structures, stiffening concepts and understanding of modes
          Beam Splitter - wires outside the fibres & 2 stages of a BS in through the door. (ref: e-mail from NAR)
    5. Vent Grooves or Vent holes?
    a) If possible minimise blind holes 
    b) Recommend combination of groove in part at entrance to hole and vent hole to the outside at or near the bottom of the hole. 
    c) Could also use vented washers and vented SHCS (difficult to remember!) But could be used as a fall back to (a)
    6. Connectors OR Clamps for the reaction chain? 
             Mike Plissi to find out information from GEO and NAR to talk to Bryan Lantz (Larry Jones)
    7. Drawing Guidelines - ready for release! 
    8. Rain dance - MPL, IW and CIT using it for regular calls? Is it cheaper? 
    9. Overall suspension assembly (including suspension wire) with upper structure & extended catcher ("3+1"). Shows Tank, Beam tubes, internal seismic system, Lab floor, LIGO man. - NEXT WEEK! 
    ACTION (IW): - Ian to supply footprint for the top stage showing loaded blades?
    MEETING DM 023     Monday October 4th  8:00am PT

    1. Review of "3&1" assembly, assembly of UI and Top mass, roll adjustment & design concepts for the structure (SYS meeting) 

    RAJ: - Cover for glass optics has effect of design of V-block + electrostatic face mask, D040146 - NEXT WEEK!


    2. Top mass, UI mass and blade clamps (IW and MPL) 
            http://www.physics.gla.ac.uk/~mplloyd/ALIGO/D040370_ETM_Assembly_Top_Mass_01OCT04.htm
        MPL To Update Blade Clamps including switching the "recess" to the bottom and confirming the height to IW.
        NOTE: - Prototype clamps at Cal Tech for bench tests only!
        MPL - Can you release the March 8th document on position of "recess"

    3. Wire Clamp Tests - link to e-mail from C Torrie on 30 Sept 2004
        FOR REVIEW: - Wire Clamp Trials Proposal by I.Wilmut on 4th October 2004

    MEETING DM 022     Tuesday September 28th  8:00am PT

    OUTSTANDING ACTIONS: - 

    Mechanical Finger Calculation? IW - DONE! 
          - With 1/2" BOLTS you can move the tip +/- 1mm 
    Ricardo / Nicki's Creep in Maraging Steel Experiment. Investigating relationship between temperature and creep, up to 200oC, as a result of the advanced LIGO baking requirement when preparing for vacuum. 
         C Torrie proposes that if we have time that we should perform the creep test under load on the selected blades at 100oC for 1 week and then request that the blades are only baked to 100oC when they are prepared for vacuum. The results from Ricardo / Nicki will help us for the noise prototype and beyond! 

    Test for Oversized Taps? -CIT - TO DO!
    Reaction Stage Wire break off - Designed such that final stage in the reaction chain is at a slight angle! - DONE! 
    Footprint of blade wire clamp - MPL supplied to IW.  IW sent .STEP file of design to MPL. - DONE! 
    Height of Blade Clamp in UI Mass? MPL
    Pulling Tests for Blade Wire Clamps - IW exchanging e-mails with SUS team - IN PROGRESS! 
    BTF for Cal tech - IW reported that the re-works are coming along very well. 
    Fonts for ProEngineer for Adobe? IW - TO DO! 

    1. Pen Mass, Reaction test mass, test mass and clamp jig all in workshop. 

    2. Drawing Guidelines (Serial numbers etc ... - MPL) the DCC and DCN's      - Will be added to drawing guidelines CIT to talk to DC! 

    Say one wanted to make blade clamps with a quantity of 2 of 2 variants 
    e.g. D040182-04   (1)         D040182-04   (1)      D040182-04   (2)         D040182-04   (2) 
          SN001                          SN002                      SN001                          SN002
    You will now be able to reserve document numbers for drawings, documents etc ... at http://antares.ligo.caltech.edu/dcc/numdefault.htf
      a) The Category depends on drawing, D, technical note, T, etc ... 
      b) The Group is K for UK 
      c) Title usually includes for example: -  SystemSub-System    Next AssemblyDescription 
             ADVANCED LIGO SUSPENSIONS ETM N_PTPYE TEST MASS
      d) Your Author ID is HayT.  Note: - On the drawing sheet you should still be T. Hayler
    You can search for documents using: - http://antares.ligo.caltech.edu/dcc/default.htf
    And for reserved numbers using: -  http://antares.ligo.caltech.edu/dcc/logdefault.htf
    Once a document is ready to be submitted you can e-mail it to dcc@ligo.caltech.edu with instructions to change title, add to author list, keywords etc ... if required. As a back-up the folks at the DCC will reference your drawing to cross reference and update your title, number etc ... 
    (They will take the information from system, sub-system, next assembly and description to create/update/cross-reference your title.) 

    3. Set up tools in Conference Room (web camera and VNC) - CIT to talk to Larry Wallace. 

    4. SolidWorks hints and tip page.

    5. Monday talk with Justin. Tim pending visit +  Ian's upcoming visit. (Software, documents, blades etc ...) 
    ITEMS FROM OTHERS BEFORE NEXT WEEK! 
       Mike Plissi (GEO structures) and Norna (Beam Splitter and MATLAB) offered help to Tim

    (1) ITM penultimate reaction mass design (associated with CP in the ITM) 
    What is involved and what effect is there on the rest of the chain on making the C_PTYPE or N_PTYPE ETM / ITM configurable. 
    i.e. wires, catchers, masses etc ...
    (2) BS structure design (including layout) 
    (3) ITM/FM structure design (including layout) 
    (4) mass catcher cam design - not immediately required 
    (5) ear fixture design - not immediately required 
    (6) stress in the clamps  (info available from MPL / AG)
    (7) tablecloth design/OSEM alignment 
    (8) Lab work - 40kg masses and Ergo arm
    *NEW* (9) Modelling Work (i.e. MATLAB) linking to layout work? 
    *NEW* (10) 3 Concepts of  arranging the SEI and SUS systems in the chamber 

    MEETING DM 021     Tuesday September 21st 8:00am PT

    1. Task Summary - Updated with comments form last week, reference only! "Long Pole" items also see yesterday's discussion with RAL below. 

    2. "3&1" Assembly technique for ETM - Discuss! (RAJ to update & release to group) 

    3. Please refer to: - 10th September Top Mass Assembly - MPL .Could also be applied to UI mass which aids with "3&1" assembly. 

    4. Inside the BSC 2 concepts for mounting the structure

    5. N values in the ETM C-Ptype Quad

    Monday Sept 20th 2004
    IW, JG, CIT, JHR (IW & JG in Amsterdam Tuesday)
      Further to Summary wrt Task Summary the following came up: - 
        1) Visit by IW - 3 weeks (confident 5th to 25th still okay!)
        2) Structure with JHR (exclusive) 
        3) Structure plan with DC (1,2 &3 and mock-ups to both Stanford and MIT) 
        4) MPL to extend visits to RAL and Cal Tech? 
        5) Tablecloth + other for MPL? 
        6) DC's idea for Tim Hayler. How do we accommodate translation & rotation of cages wrt interface. 
    ACTION: - JG to consider this wrt Tim's visit to Cal tech (useful for bringing up to speed on both SEI and SUS systems) - DONE! 
        7) RAL - Blade clamps, blade wire clamps, top stage 
            ACTION: - IW to look at "mechanical finger" wrt clamp and blade holes - TO DO! 

    MEETING DM 020     Monday September 13th  2004

    1. Task Summary - REVIEW BY DESIGN TEAM OF PROGRESS - LINK TO T040016-09
         The task summary now includes several new sections related to making the QUAD (both controls and noise) flexible for silica or sapphire. 
         David S. wants to discuss this, and his questions, on Tuesday at the SUS meeting. I would like to concentrate on the detail of the task summary. 
         i.e. comments on structure work or progress with suspended masses etc ... 

    MEETING DM 019     Thursday September 9th  2004

    FROM PREVIOUS WEEKS - Visits to Cal Tech; Visit to RAL; Items for Tim Hayler's visit, BTF to Cal Tech & "3&1" assembly for an ETM - see below! 

    1. Web Portal, PDMWorks, VNC & VRVS   - Update & review introduction page 
    2. Vacuum oven for Cal tech - Larry Jones  - N_Ptype could be cleaned and baked by LIGO! (Production items cleaned in LIGO) 

    Add link to proposed design by LJ  &  add link to e-mail discussions. 
    3. PDS for lower masses by CIT   -     Sketch of Test Mass  (Mass = 39.57kg, M.ofI. Ixx=0.462, Iyy=0.273, Izz=0.272 kg*m^2) 
    Sketch of Reaction Test Mass (loop or clamp)
    REF: Table for lower masses from T040013
    (ALL THE FILES ARE ON THE PDMWORKS VAULT: 131.215.115.22  FOLDER: suspension / cptype etm/02 suspensions / test mass) 

    4. "3&1" Assembly technique for ETM - Discuss! - CIT & RAJ to update! 

    5. Density of Stainless steel and Maraging Steel: - I propose we go with calling out for either 303/304 SSTL on the drawings and use 7900 kg/m^3. 
    (an continue work by IW, CIT, MPL and RAJ) - AGREED!

    6. Solidworks 2004  - hints and tips from users (should we create a comments page?) 

    7. Bill of Materials, Overall BofM, DCN and Materials List in EXCEL  - ACTION: - CIT & MPL - TO DO!

    8. Creep in Maraging Steel & Silicon flexures - Ref: Ricardo's entry to LSC SWG elog. 
    ACTION: - DES Review & Discuss - NIP!   ACTION: - CIT to talk to student and look at experiment - DONE! 

    9. Strength of oversized versus regular tap - ACTION: - IW and CIT - TO DO!

    MEETING DM 018     Thursday September 2nd  2004
     - DM019 will be on Thursday September 9th 2004 then back to Mondays. 

    1. Reaction Chain Loop round the Test mass. 

    ACTION CIT to look at GEO layout and to increase the break off ofn the reaction chain so that there is a slight angle to the vertical. Wire Length change transferred to IW? - DONE! Looking face on the wire in the Final Stage of reaction chain at slight angle to vertical.


    2. Increased Footprint associated with the "3&1" assembly - Russell Jones e-mail on Sept 2nd 2004 to DES group. 

    Ken Mailand happy with increase and briefly discussed his concept for the installation arm.
    3. MPL's new revision of PDS documents on UI and top mass, now on DCC - Summary! 
    T040071-02-R and T040096-02-R - includes summary of what has changed from 01 to 01 revision
    MPL is aware of requirements from "3&1" assembly technique wrt partially assembling the UI mass
    4. Review of visit to Cal Tech by MPL, now on DCC 
    T040165-00-K Summary Report of Visit to LIGO, Cal tech, June-July 2004 M.Perreur-Lloyd
    MPL is working on pitch / roll adjustment
    MPL (& AG) looking at deflection of masses with a loaded blade


    5. Tim's LIST! for discussion. (inc. JG idea) - THE FOLLOWING LIST HAS BEEN PROVISIONALLY UPDATED BY DES TEAM

    (1) ITM penultimate reaction mass design (associated with CP in the ITM) 
    What is involved and what effect is there on the rest of the chain on making the C_PTYPE or N_PTYPE ETM / ITM configurable. 
    i.e. wires, catchers, masses etc ...
    (2) BS structure design (including layout) 
    (3) ITM/FM structure design (including layout) 
    (4) mass catcher cam design - not immediately required 
    (5) ear fixture design - not immediately required 
    (6) stress in the clamps  (info available from MPL / AG)
    (7) tablecloth design/OSEM alignment 
    (8) Lab work - 40kg masses and Ergo arm
    *NEW* (9) Modelling Work (i.e. MATLAB) linking to layout work? 

    6. Density. Proposal by CIT to consider using density = 7900 kg/m^3  and 303 or 304 SSTL  instead of den = 7800 kg/m^3 and 300 SSTL 

    ACTION: - JHR / CIT to ask Mike G., Ric P and Larry Jones - DONE! reference DM019
    MEETING DM 017     Monday August 23rd  2004 


    1. Lower masses of the Quad. MPL and I re-worked a couple of the parts associated with the bench testing of the lower masses and ordered new pieces of hardware. The masses were re-assembled and at the same time several aspects of assembly were considered. 
      IMG_0431.JPG and IMG_0432.JPG

    2. An alternative method for assembling the masses and splitting the upper and lower sections of the structure: - 

    "2&2" versus "3&1" ( sketch1 of 3  ,  sketch 2 of 3  &  sketch 3 of 3 )


    3. Lower Masses for the C_ptype becoming more like N_ptype. S/steel wire loop for the final stage of wire in the reaction chain rather than "clamp-wire-clamp", see cartoon sketch of lower masses by CIT. 
    ACTION: - IW to incorporate length range of ~ 30cm to 1.5m in the wire jig assembly - TO DO! 

    4. BTF for Cal tech (IW to consider what has to be done to characterise blades at Cal tech in November 2004) 
       ACTION: - IW to create list and to discuss with JG options wrt BTF. IW proposes to modify existing set-up prior to transfer to Cal Tech. 
    - IN PROGRESS!
    5. Visits to Cal tech (ref e-mail on visits from CIT and MPL) 

    Tim Hayler October 3rd to October 23rd 2004 
    Mike Perreur-Lloyd October 19th to November 19th 2004 ? * 
    Ian Wilmut Nov 8th to Nov 25th ? ** 
    i. BLADE CHARACTERISATION (ref data gathered by MVP on MC Blades)
    ii. BTF (set-up for blades and arrangement working in clean conditions) ACTION: - need to arrange cleaning with Bob and Helena (~ days)
    iii. Overlap with MPL/CIT on deflection of Blades & measuring internal mode & assembly of upper masses & flattening blades
    iv. Transfer of next section of work (i.e. wire clamps / wire jigs)
    v. Viewing process and visit to Valley Precision & CES
    vi. Top Stage wrt Structure (JHR) 
    vii. Other RAL (I Wilmut) responsibilities include the mass rig for assembling the top masses and a method of flattening the blades
    Russell Jones Nov 29th - Dec 4th ? *** 
            Caroline Cantley, Justin Greenhalgh & Norna Robertson  (also Dec - Jan?) 
                 * dependent on upper masses
               ** dependent on blades, drawings for wire jigs etc ... & BTF
             *** dependent on prototype catcher


    6. Update on order for C_ptype Blades 
    7. Other: - SolidWorks files to Birmingham - RAJ and SA. 
                   - MPL's benching testing of a blade at RAL. What needs to be manufactured? (plate, clamp) 

    On Friday August 20th 2004 (CIT, JHR, CAC, IW, RJ &MPL) met to discuss some of the following items
    1. Density, galling & magnetism document, reference discussion on July 30th 2004
    2. Blade Wire Clamps & wire jigs requirements  (ref Feb and March discussion on design page) 
    ACTION: CIT to reply to IW on Wire Clamp Spec & to re-iterate Feb/March discussion - DONE!


    3. MPL visit to RAL (Cal tech parts & updated blade wire clamp from RAL) 
        ACTION: MPL to add "place card" Alum Blades for upper mass assembly test at Cal tech - DONE sent to Workshop 
    ACTION: MPL to create plate for top blades experiments at RAL - DONE
        ACTION: MPL to supply "FOOTPRINT" of wire clamp to IW.     - DONE! 
        ACTION: IW to update and then manufacture blade wire clamp for MPL's deflection test at RAL - DONE! 

    ACTION: IW described plans to perform pulling test on at least 3 methods of clamping the wire. 
                  CIT asked IW to confirm screws are no longer 2-56 and are 8-32 for example?  - TRY 6-32! - IN PROGRESS!
    4. Blade Wire Clamps. Summary of information transferred to RAL in Feb / March 2004 (excluding report by MPL) 

    • V grooves that scale with the wire thickness
    • Oversized trapped holes
    • Machined surfaces
    • Tight tolerance on the hole to hole separation
    • Tight fit on any clear holes 
    • Appropriate choice of screw i.e. 8-32 for wire ~ thickness in quad and not 2-56. Makes clamping easier.
    • REF: These are as follows D020198 , D030042 and on the LIGO-DCC  LIGO-D020319 (Assembly MC Upper Blade Wire Clamp) IT SHOULD BE NOTED THAT THIS INFORMATION ALONG WITH MPL's REPORT WAS DISCUSSED AT LENGTH IN FEB / MARCH 2004 ref design pages. CIT
    ACTION: - 2nd set of comments by CIT sent to IW for review! 

    6. Visits to Cal tech (ref e-mail on visits from CIT and MPL) - started discussions with MPL, IW, TH & RJ
    7. Roll of the Upper Int Mass (2 kg -- 10 mm or 1 kg -- 20 mm)    TO DO: - MPL to add to UI MASS!         Hi Mike            All you need to keep constant is the product of the mass and the distance moved - so a lighter mass needs to move proportionately 
                more.By the way - there is still a factor of around 2 between Mark's and my estimates which we need to resolve (could in part be 
                due to using slightly different parameter sets), but order of mag. is the same. Cheers Norna 
    8. Adobe PRO and .stp vs .dxf  (need to update document that relates to what we transfer) 
    ACTION: - IW to investigate fonts in PRO-E and consider using Auto CAD. AutoCAD doesn't work! IW believes it is a font issue!
      ACTION: - IW to look at alternative fonts to aid adobe issues wrt CAD!


    On Friday July 30th (MPL, IW, RJ & CIT) met to discuss the following items. 
    1. Theory numbers for density: RJ, IW 
    2. 2nd Batch of density pieces (IW to send .pdf to CIT - DONE!) CIT sent to Cal tech Machine Shop
    3. magnetic perm write-up (RJ) 
    4. Cal tech Expt on actual QUAD parts (MPL , CIT) - ref page 135 of CIT's book 7
    5. Parts for 2nd batch (CIT to IW , once made) 
    6. SW compare assembled masses with den = 7800 and den = 7900 (CIT, MPL) 
    7. PRO E den = 7800, mass = (compare with test samples, IW) 
    8. British Standards, (IW, RJ) 
    9. Bolt Mass (MPL, expt and SW theory) 
    10. SEISMIC den steel = ? (CIT to ask LJ) 
    11. Write up associated with batch #1 (IW) 
    12. Galling & Debrie report by LJ (CIT)

    MEETING DM 016     July  27th  2004
    1. SEISMIC Review with ASI - Larry Jones 
        SEI REVIEW WITH ASI. +.005 OVERSIZE TAP.  SUS team have been using GO / NO GO customized Gauges to test oversized holes. ASI has proposed using a N60 removable barrel nut in key areas in the seismic system. (Similar to LJ's suggestion to use N60 inserts) Blade Flexure

    QUESTIONS 
        - Barrell Nuts, do they help if you get galling? 
        - Comparison of oversized, regular & N60? Know oversized and N60 produce less debris & reduce galling BUT question of strength compared to regular? 
        - ASI BTF? 
        - Backstop for positioning the blade? 

    2. CATCHER & STRUCTURE 
           Russell Jones and Janeen Romie 
              Janeen has distributed a 2nd draft of the Upper Structure Requirements document 
              Russell has been in discussions with CIT on clamps, concepts etc ... UPDATED DESIGN SPEC
                  2piecevblock.avi         and     DM#16 27thJuly2004.pdf

    3. BLADES    - Drawings? - D size paper copies complete. 
                           -  DCN? 
                           - RFQ? 
                           - PRO-E and Adobe PRO? 
     

    4. DCN - Discuss further once drawing guidelines are distributed for comment. I believe the signatories should be seen as suggestion and that it is open for discussion. First through e-mail and then at SUS meeting on the 17th August 2004 

    5. Blade Wire Clamp - Ian has agreed to write x2 paragraphs on the specifications of the blade wire clamp (Based on Feb/March discussions & comments on BTF clamp) This will allow MPL, CIT etc ... to comment / add input 
          MIT 2001 CONCEPT QUAD BLADE WIRE CLAMP (2 WIRES)


    MEETING DM 015     July  19th  2004
    1. Blades - IW/ JG 
           Drawing - ftp://ftp.eng.rl.ac.uk/pub/Ian_Wilmut/LIGO/BLADES/D040297-A1.pdf - IW to create B
           Holes for Blade wire clamp - comments in e-mail - CIT TO email wrt holes and width!
        Blade costs - JHR - TO FOLLOW! 
        Blade Clamp Deflection - MPL 
        Blade wrt UI Mass - MPL  - DONE! 

    2. CATCHER & STRUCTURE 
           Russell Jones and Janeen Romie 
              Janeen has distributed a draft requirements document (needs updated) 
              Russell has been in discussions with CIT on clamps, concepts etc ... 

    3. BTF 
           Results on 2nd Blade 
           Transfer to Cal tech - Cleaning, Baking and CHARACTERISATION of 37 CPType blades4. MPL has sent revised version of my Top an Upper-Intermediate Mass Design Specifications to the DCC (T040071-01-R and T040096-01-R respectively). These include a number of additional specifications that have come to therefore as he has developed the designs.These are temporarily posted below. Any comments or queries can be directed to MPL through email or at the upcoming design meetings.  Thanks. Mike P-L        T040096-01 and T040071-01

    MEETING DM 014     July  12th  2004
    1. BladesProcess of exchange (checker?, e-mails with notes, dates, revisions) 
            Naming the files 
            Printing Problems? - solved!DCN's, drawing tree, material lists, BOM, drawings etc ...   (examples to follow from CIT and available on the DCC) 
            Adobe, PRO version has text editor? 
            Drawing Guidelines by Dennis Coyne, LIGO-E030350, and choice of Source file by MPL & IW, LIGO-T040112 
            Files to the DCC with source files embedded.        Data Management System - PDMWorks 

    2. PDMWorks   & moving to SolidWorks 2004. (SEI already using it. No cost) 

    3. BTF, http://www.eng-external.rl.ac.uk/advligo/images/btf%20pictures/

    4. n1 value 

    5. Visits 
           IGR and RAL dependent on VISA. Dates if had to change? 
     

    IF TIME PERMITS: - 

    6. SEI REVIEW WITH ASI. +.005 OVERSIZE TAP.  SUS team have been using GO / NO GO customized Gauges to test oversized holes. ASI has proposed using a N60 removable barrel nut in key areas in the seismic system. (Similar to LJ's suggestion to use N60 inserts in key areas) Blade Flexure

    7. Catcher - RJ  (order 2nd lift table) 

    INFO: - http://emvogil-3.mit.edu/~kmason/triple_installation/

    MEETING DM 013     June 28th  2004

    1. Blades wrt wire clamp at upper int mass  (MPL, links to follow!)

    a) n1 (1/2 sep of wires) 
    Preliminary: - reduces coupling of yaw modes but settling time ~ okay! (NAR to confirm)
    b) angle of blades 
    Not Good: - off axis M.of I. become larger than Ixx, Iyy etc ...
    c) width of blades at the tip 
                 Could go with holes behind one another rather than side to side 
    d) move blade in Z? 
                 No. Want central axis of blade to be at the flexure point
    REF: Design_Decisions_for_U-I Mass_25JUN04.pdf 
    2. C_ptype ear design wrt
    a) width (thickness)   (early N_ptype design) 
    ACTION: - MPL to consider reducing thickness of main section and "ski-slope" - DONE with UK folks!
    b) sharp edge vs. rounded
    - Sharp! More like N_ptype. - DONE included in C_ptype design!
    3. DCN. Based on discussions with DC would like to release and post all drawings to the Vault (PDMWorks) and to the DCC


     (Link to example of DCN's) 

    4. SEI REVIEW WITH ASI. NEXT WEEK!

    5. BLADE COMMITTEE (REF: Quote document)

    For recent blade drawings, example from IW set of -04 drawings,  we chose 4 companies (3 local and 1 in Denver) to quote and 1 (Maher, UK) for request for information. 
    Questions from HPD (all related to what are fixed and what are guideline and linked to his thoughts about perhaps making them from a block that gets wire EDM: -

    a) Clamping Width and its tolerance? 
        - Tolerance of +/-.002 on the 1.181 for outside shape. What if we say 1.18 to 1.28 for roll?
    b) Question regarding can the whole blade be made curved instead of curved and flat as shown?
        - Flat and curved. Concerned about noise and clamping.
    c) Question on whether there can be a radius where the straight edge starts near the tip of the blade?
        - Rounded is good!
    d) reason for final heat treatment? and does this hold if he uses a block and wire EDM?
        - Heat treatment to harden material after machining to get yield strength up to our requirement. Therefore if you choose wire EDM and want to perform the heat treatment beforehand we would need to ensure blades would meet our required properties.

    ACTION: -  CIT  EXCHANGED INFORMATION WITH ALL COMPANIES, QUOTE DEADLINE EXTENDED. - DONE!

    HPD also requested that they quote for 12 and estimate for 100. After today's meeting we can talk to HPD if required and will offer an extension to all 4 companies. 

    ACTION: - JG / IW to look at density of 3 stainless steel's and 2 aluminium's. 
                         CIT and MPL have data on several machined pieces on machined steel, that were made for the Cal tech single pendulum prototype.                         This should be exchanged with RAL! 

    Future Topics: -
      Catcher - RJ - Next Week 
      Double pendulum and reaction chain - CIT - Next Week 
      Structure Requirements - JHR - Next Week 

    NO MEETING June 14th and June 21st 2004
    MEETING DM 012     June 7th 2004 

    1. Blade drawing updates by Ian Wilmut (following discussions with SUS group on Thursday 3rd June 2004) 

    COMMENTS FROM MPLAll probably need further discussion between Calum, myself and you before definite inclusion in the drawings. (EDITED)5) On page 1 of 2, You have a very tight tolerance of 0.05mm for the blade width (x-dim) and depth (y-dim) but then only Basic Tolerances of +/-0.2mm for the distance to centreline and Hole to Hole dimension. - FOR DISCUSSION! - DONE!7) In Detail A, page 1 of 2, There is no annotation as to what the dashed triangular line represents and on the Top View it may not be clear to the manufacturer that this is where the 420mmm dimension is to. FOR DISCUSSION!
     

    COMMENTS FROM CIT
    1. I need dual dimensions for the companies we use -ACCEPTED! 
    2. We need a DCC number and revision number -  ACCEPTED!
    3. Should we expand on the drawing sheet? IGR and Cal tech put a big effort into creating a single sheet format that covered everyone. This only references RAL!  -  ACCEPTED!
    4. At the very least it would be useful to have System, Sub-system, Next assembly, Drawing Number, Revision etc .. on drawing (ref any a-ligo drawing by IGR or Cal tech) - ACCEPTED!
    5. add a reference to internal notes, also don't think you need to quote so many sig. figures for the frequencies etc ... - ACCEPTED!
    6. in NOTES #3 is it really 490 for 4 hours? - TO BE CHANGED! - DONE!
    7. In NOTES #4 we will need to supply drawings or parts for the form you mention. TO DO: - CIT TO GET PICTURE FROM VIRGO - DONE!

    With regard to your questions: - 
    1. To first order it should be in the middle, however Justin must have calculated the number you quoted? In any case I think a hole is required in the blade - 2/3 CHOSEN - MOVE TO 1/2!    TO DO: - MPL TO CHECK WRT UPPER INT MASS 
    2. Ref T030118 by MPL - JHR -to supply info on size of 1/2-13 AG-SST - DONE! (ref email from JHR on 6th JUNE 2004)
    3. Depends what your clamp looks like? But looks reasonable. Perhaps 16mm would be a bit better. QUESTION: - The position of the holes for the blade clamps looks very close to the end of the blade? 
    TO DO: - IW to concept a clamp in order to better locate holes - - DONE!
    TO DO: - IW to check numbers from excel calculator - # NOW MATCH!
    TO DO: - IW to supply drawings to JHR by 9th June. New revision to JHR by 25th June - DONE!

    2. Yaw AdjustmentAt last week's suspension meeting, the topic of a yaw adjustment of both Main and reaction TM suspensions was brought up. The suggestion was that this could be done in the space between the Top of the structure and the Top Blade rotational adjuster (currently there is a shim in this space).Can we discuss ideas for this and who might do the design of this a week on Monday (DM012).Thanks. Mike P-L.- NO LONGER RELEVANT! 

    3. CIT et al visit ot UK     (find out about visit to US Embassy on June 18th. TAR approved) 
    - Ian not at RAL early August. Justin not in RAL late August. Caroline going to LSC and on vacation 2nd and 3rd August. Proposed Cal tech visit in early September. RAL, Russell, Norna? 


    MEETING DM 011     May 24th 2004

    1. MPL x2 UPPER INTERMEDIATE MASS documents   T040095-Draft ETM Upper-Intermediate Mass: Design Brief    T040096-Draft ETM Upper-Intermediate Mass: Product Design Specification 
    NOW BOTH ON DCC! 
            Some initial questions raised when writing these are:            1) Do we need pitch adjustment at the Upper-Intermediate Mass? 
    Ans: Adjustment of coils!  MIT input form concept Quad. Yes. Adapt  MC design and Improve!            2) Is there space for adjustment of the middle wire breakoffs at the Upper-Int Mass. 
    Ans: Rotational adjuster on blades? adjustment of upper int wire? One or other! Mechanical finger? Tolerance calculation.            3) Should we have a short form name for the Upper-Intermediate Mass (I was getting bored having to write it out so many times!)?- U-I Mass? Up-Int Mass? Upper-Int Mass? Other name?! 
    Ans:  U-I Mass 
                 4) GC dampers? Better to call the coils alignment. Hybrid OSEM and 10x10 magnet as defaultACTION: - JG to investigate stainless wrt how magnetic effects?
                  ACTION: - CIT CP PEN MASS , from S/Steel or Copper?
     

    ACTION: - PITCH AND YAW ADJUSTMENT AT UPPER INT AND TOP MASS ? (MPL & CIT)
    2. RJ and CIT - Cal tech Visit (email from CIT, T040107,  summarising experiments + photos) dd
     
    ACTION: - JHR, CIT AND RJ working on further document summarising week's work. Further visit planned for Sept 2004
    3. MPL's visit to Cal tech - June and July 2004 

    4. Blade Drawings - IW - NEXT WEEK! 

    MEETING DM 010     May 10th 2004


     1. T040073 ETM Top Mass Design Brief  &  T040071 ETM Top Mass Product Design Specification - any comments?
     

    2. Wire Jigs - IW 

    - add start clamp and expand on "wire jigs thoughts" to include information form emails from both CIT and NAR  ff  (lever.tif.) 


    3. Top Blades and Interface with Structure - IW 

    - reference email and .excel file from IW


    4. Double Pendulum - CIT 

    5. Top mass - osems and ecd's - CIT  (LINK TO E-DRAWING) 

    Discuss - pitch, yaw and longitudinal osmes wrt centre of  mass? and lever arms & number of osmes damping each degree of freedom?
    At present: - Vertical lever arm = 160 mm (1/2 separation of osems acting in vertical direction) ?
    Pitch lever arm = 110 mm (separation of osems acting on pitch direction) ?
    Yaw lever arm =  120 mm (1/2 separation of osems acting on yaw) ?
    6. Attached is a summary of the testing that we have undertaken to try and determine the best universal CAD file format for use in the design of future suspensions.  SW-ProE-Ansys_Compatible_file_types1.pdf
     
    7. Density of 300 STAINLESS 7.8 or 8.0 kg/m^3
    NO MEETING      May 3rd due to holiday in UK (also no meeting on May 31st due to holiday in UK and US.)

    MEETING DM 009     April 26th 2004
    - KAS added to DES user group
    1. T040073 ETM Top Mass Design Brief  &  T040071 ETM Top Mass Product Design Specification - BOTH MPL 
     

    2. T040072-00-R_Pendulum_Parameters&Naming_Convention.pdf  - MPL 

    ACTION MPL - to incorporate suggestions on adding lever arms, sketch of osems etc ... and note of frequencies- DONE!
     
    3.  Note on Changes to Bottom Blade.pdf  - MPL 
    ACTION MPL - to look at increasing the length of the mass and re-positioning the blades. - DONE!
    ACTION NAR - effect of increasing  n3 in the Quad? - DONE!
    4. If there is time I will also run VNC at 131.215.115.121  in order to show off the 4 assemblies of the penultimate and test mass assemblies for both the main and reaction chains. 
    NOTE: Only seems to work when 1 other is connected. When 2 people connect it throws one out! 
    ACTION - CIT to email VNC to ask why?


    5. Justin also sent an MPP of IW's work reference pdf

    NOTE: - MPL requested that the top blade wire clamp be brought forward in the schedule
    ACTION JG: - to arrange a blade committee meeting with a view to selecting blade parameters for the end of May 2004. - DONE!


    6. MATLAB files from Norna - 2 locations? discuss - TOPIC FOR SUS MEETING 27th April 2004

    7. Blade internal noise - NAR - TOPIC FOR SUS MEETING 27th April 2004


    MEETING DM 008     April 19th 2004

    1. Catcher - visits to Glasgow and Cal tech, email from CIT on 4th April 2004 "4 Catcher Related Experiments " 

    NOTE: Russell Jones to visit Cal tech form the 9th to the 15th May to carry out above tasks.


    2. Wire Jigs - on hold RAL on holiday! - reference DM 010. 

    3.  Double pendulum requirements - MPL, NAR and CIT, email with attachment from CIT April 16th 2004, "T040013-04" 

    ACTION CIT - to create e-drawings or sketches of all of the assemblies for discussion in DM 010- DONE!


    4.  Blades, email from NAR on 4th April 2004 "Revised Blade Sizes" 

    NOTE: - Discussed and numbers so far have been agreed, more discussion required in Blade Committee meeting #03


    5. PDS for Upper Mass, email from MPL on 16th April 2004 includes draft of PDS on Upper Mass for ETM - reference DM 009


    MEETING DM 007     April 05th 2004

    1. Comments on MPL's report on his visit to Cal tech? - DONE!

    2.  Double pendulum requirements - MPL and CIT, - reference DM008

    3. Requirements / discussion wrt the Wire Jigs - IW 

    For Monday's telecon I have created 3 pictures and one word document relating to wire jigs, these can be found on http://www.eng-external.rl.ac.uk/advligo/daylinks/ . 
      Updated information to e-amil from CIT to IW from NAR, March 30 2004
     Response by IW from comments by CIT, April 2nd 2004    and attachment. - DONE!
    ACTION IW: - To add start clamp, adapt to include other comments in email and will discuss again in DM 010.


    4.  Layout of the top blades wrt a concept structure, spacer and concept rotational adjuster, layout of top blades wrt concept structure and spacer.zip. The distance from the start of the suspension to the top of the structure is 106mm, ref mass budget paper. It should be noted that the concepts were gathered together last July in order to address the issue of how to assemble a quad and therefore some parts may interfere. 

    IW: - Received e-mail and was able to access STEP files etc ...
    5. Subject: tablecloth design for inter OSEMs.The possibility of an interferometric OSEM tablecloth design should be discussed once Calum has updated his controls prototype / quad for xmas worksheet, later DONE (see link in introduction section) 
    CIT: - Added to Task List, T040016-03. ACTION: - JHR + JG have actions related to task list. - JG DONE! see DM 009


    6. Catcher experiments, reference e-mail from CIT April 5th 2004 

    CIT: - Updated GLA on prototype parts related to 4 Catcher experiments - reference DM008 #1


    7.  No meeting next week, the 12th April as Easter Monday 


    MEETING DM006      March 29th 2004

    1.  Summary of MPL's visit to Cal tech (Feb 2004) - MPL's web page in Glasgow 

    2.  Lower Footprint of the Quadruple Pendulum Structure (480mm x 480mm) - Discuss (can we reduce the face-on dimension by 40mm?) 
              - on hold until analysis completed by DC on seismic / suspension combination 

    3. Blade Wire Clamps and blade clamps ... continued - IW  COMMENTS FROM MPL 

    - also comments from CIT re. the angle of the blade wire clamp? 
    NOTE: Information transferred to IW / JG
    4. Re: BTF - incorporating the blade eddy current damper, reaction chain, rotational adjuster and the interaction with the structure, earthquake stops etc ... ? 
    NOTE: Information transferred to IW / JG 


    5. Wire Clamp at Penultimate mass (sketch) - 

    ACTION - CIT to supply, see T040013 - DONE!


    6. Requirements / discussion wrt the Wire Jigs - IW and CIT 

    NOTE: Information transferred to IW / JG - reference DM 010. 


    7. MPL has created a table of file types and compatibility between ANSYS, SolidWorks, Pro/E etc ... 

    - Algor, AutoCAD, I-DEAS, E-drawings? 
    DECISION - STEP File works for Pro/E to SolidWorks. SAT file for SolidWorks to ANSYS
    8. CIT to report on upper wire clamp at upper mass and upper intermediate mass should be a RAL responsibility but with requirements set by for example, MPL, from the layout. 
    NO MEETINGS      March 8th and March 15th 2004 due to the LSC at LLO

    MEETING DM005      March 8th 2004
     
    1.  Summary of MPL's visit to Cal tech (Feb 2004) - next week 

    2.  Lower Footprint of the Quadruple Pendulum Structure (480mm x 480mm) - Discuss (can we reduce the face-on dimension by 40mm?) 
    ACTION: - MPL to create sketch - DONE! included in CIT's talk at LSC, G040095-01-D. 

    3.  Recess in blade clamp (with input from MPL and AG) 
              MPL Discussed aspects of why we have one recess and not two, see link. 

    4. BTF Summary-00 and Blade Wire Clamps and blade clamps ... continued - IW 
    ACTION: - MPL to supply info on Rotational Adjuster to design group. At present it is an item from MPL- DONE!

    5. Wire Clamp at Penultimate mass (sketch) - next week. 

    6. Catcher - RAJ and 
           SEI layout (e-drawing)        and  sketch of LASTI layout by Larry Jones (LASTI fit model 1)
    ACTION: - CIT to order parts as requested and to consider extra parts for suspending the double pendulum - DONE!
                (Ques: From CIT. Could use left over / spare  LIGO MC parts?) - YES!
                 ACTION: - CIT / RJ to create a model of the tank, SEI table, 2 stage structure and suspension for the LSC. - DONE!


    MEETING DM004   March 1st 2004
     
    1.  I have been testing various gadgets and would like to try http://131.215.115.71/  and also plan a test with  the VNC system 
    ACTION: CIT and MPL to investigate VNC and usefulness network cameras. CIT to fix IP address of SUS laptop.- DONE!
    2.  Upper Mass Deflection - MPL? 
           MPL supplied summary - next week 

    3.  Blade wire Clamps - IW? LINK TO .pdf from .zip files of March 1st 2004
           IW to continue discussions on the designs for blade test facility on 8th March 2004 
    ACTION: - CIT - to share knowledge on recess in blade clamp (with input from MPL and AG) - EMAIL SENT
               ACTION: CIT to supply a sketch of a wire in a typical groove used on suspensions.

    4. Structure (Quadx19.sldprt) quadx19-01 update and summary  - MPL and CIT 
    DECISION: JHR & CIT will make prototype structures. One complete and the other will represent the footprint of the lower stage.

    5. Discuss update to the 2-D layout for the catcher, see link ( DM003 #1 "Quad Layout-02" ) - see # 7 

    6. single and double-01 Single and Double Pendulum experiments at Caltech - MPL / CIT. - Discussion and summary by CIT. 

    7. Catcher Spec for Quad - RJ? (link to #5) - continue on March 8th 2004 

    8. Blade Meeting - Thursday - (JG, NAR, MVP and CIT) 

    ACTION: CIT to update highlights and plans to set-up web page- DONE!. 
    Continue discussions at LSC and Suspension Summit - DONE! 
    ACTION: Update LLO MArch 2004 Summit page with links to blade talks- DONE!


    9. Cal tech Quad Task List (WIP)? 
              CIT sent email to JG, CAC, NAR and JHR. Discussion on Tuesday 9th March 2004 at 10am PT 
                  - MPL can continue work on Upper mass  (CAC and JG) 

    10. Eddy Current Damper Paper - MVP has questions. - Covered by email between MB, MVP and CIT 

    11. Local Control osems wrt wire and structure in a Quad - CIT has 2 points and question for JG. - Issue for SUS meeting



    MEETING DM003   FEB 23rd 2004
     
    1.     I'd like the quad mass catcher to be discussed on Feb 23rd of possible. -CAC
                    MC Layout -01 and QUAD Layout-02  wrt CATCHER with numbers from MATLAB model. 22nd FEB 2004 
                     ACTION: - CIT and MPL to load & update layouts. - DONE 
     
    2. (NAR requests we discuss this on the 23rd) 
    One possibility is the use of an interferometer sensor, especially for the longitudinal control on the top mass of the MC (and possibly for the vertical ETM and ITM). It has excellent performance (3*10^-12 demonstrated, may get better). This might be rather bigger than then existing OSEM designs (adding a unit say 40mm by 10 by 20 on the back of the OSEM) and the question has been asked how big they could be and still fit. We could maybe discuss it at the design telecon today? - JG 
             ACTION: - transferred to SUS Weekly for discussion 

    3. T030118-01_Imperial_Bolt_&_Hole_Specification1.pdf  - MPL  (Remove link once MPL has moved to  LIGO-DCC) 

    4.  OSEMS. 
    JG request to discuss over numbers of LC and GC. 
            ACTION: - transferred to SUS Weekly for discussion



    MEETING  DM002           FEB 16th 2004 - US holiday but could still have meeting? YES! CIT to call RAL and GLA
     
    1. STRUCTURE ACTION LIST to review 
    - Put on hold for now as JHR and CAC were not in attendance. CIT to discuss ideas in list and preliminary results on Mode Cleaner with JHR and DC


    2. Cal tech Prototype (Penultimate and Test Mass Assembly) for single and double pendulum tests - MPL 

    - Link to introduction report, T040013-01, in progress,  summarising mass , moment of inertia etc .. for test mass assemblies - MPL / CIT 
    DECISION: - NAR looked over and agreed with numbers

    - Link to E-drawing of the test mass prototype assembly, with alum faces
    - Link to E-drawing of the prototype test mass with glass faces
    DECISION: - Drawings associated with assembly  D040038 are in Cal tech workshop with a view to assemble and suspend a single 40kg pendulum
    ACTION: - MPL to update e-drawings with measuring tool enabled + further check of e-drawing version - DONE, Feb 25th 2004. All groups now have capability to access E-drawings from SolidWorks.


    3. Blade Wire Clamps (2 designs from Ian Wilmut) - IW 
                        - Email on 9th Feb 2004 (design -011) and (design -016)

    - Summary of key features of the blade wire clamps, design 011 and 016 (Ian Wilmut) 
    - CIT summarised various aspects that were incorporated into the MC blade wire clamp drawings all of which improved the breaking stress of the "clamp-wire-clamp assemblies. These are as follows D020198 , D030042 and on the LIGO-DCC  LIGO-D020319 (Assembly MC Upper Blade Wire Clamp) (Calum Torrie) 
    ACTION:  - MPL to update T030118 and include references - DONE, feb 25th 2004. Now on LIGO-DCC
    ACTION: - IW to incorporate tighter clearance holes, tighter hole to hole tolerance etc... as per the drawings referenced from the assembly D020319 above - To discuss in DM004


    4. Email from CIT re. Flexure point calculator and suggestions for blade wire clamps, includes email from NAR with updated wire radii
    ACTION: - IW to incorporate the idea of the step into the blade wire clamp design, such that the flexure point is at the
                         mid-plane of the blade. - IW to include in assembly and we will discuss in DM004


              5.  OSEMS. 

    JG request to discuss over numbers of LC and GC - CIT to ask JHR also useful link is talk (G010086-00) by Peter Fritschel at LSC
    ACTION: - GC Osmes for upper intermediate reaction and penultimate reaction mass? - now an action for SUS meeting 
    ACTION: - MPL / CIT to look at a clamp unit that could incorporate either the LIGO I or the hybrid osems
    -  NOTE: Could use larger magnet with LIGO I style osems as no need for LED and PD. 

    MEETING DM001    FEB 9th 2004

          Format,  discussion,  layout, interaction 

             1.   RAL BLADES 
                     - Design and Drawings by IW

                        - Email from Calum
    - Perhaps require hole for blade ECD, IW to add to drawing.
    ACTION: - IW to add LIGO document numbers - DONE, Feb 16th 2004
    MVP passed on several comments to IW on the design
    DECISION: - RAL To make prototype blades incorporating discussion points
    Feb 16th 2004 - IW reported blades are out for quote with 4 companies including ACCROFAB


              2.   WIRE FLEXURE POINT 
                    - Change to wires (for discussion) Calculation by Caroline
                             - NAR keen to discuss 

    ACTION: - CIT to bring up the question of any 2nd order effects on the blade in the  SUS meeting - DONE, Feb 16th 2004
    DECISION: - CIT summarised discussion in an email to design team on 13 Feb 2004, for discussion in DM002.
    3.   STRUCTURE (Progression towards meeting 150 Hz requirement)
                    - email by CIT on 21st Jan 2004
                          - CIT requested CAC, RAJ, JHR, CIT review document and actions in above link for discussion in DM002 
     
     4.  PDMWorks Vault, preview with Real VNC  - CIT 
                  - see notes in introduction


               5.   Summary of 2 blade wire Designs (IW) 

    ACTION: - IW to send paragraph explaining both designs - DONE, Feb 16th 2004. Discussed in DM002

    FUTURE ITEMS
     
      General discussion on assembly of quasi-monolithic stage of quads. - CAC 


    2. USEFUL LINKS / DOCUMENTS: -

        1. Conceptual Design document, LIGO-T010103  - contact NAR re. updates and questions re. parameters 

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