Weekly Report for Week Ending June 27, 2002

The LIGO Executive Committee Agenda for Monday  July 1, 2002 will be:

 (Meeting time: 10:30 am Pacific Time)

Open meeting 10:30 - 11:30

1. Announcements
2. LSC Issues (Weiss)
3. Comments on Weekly Report
4. WBS 1 LIGO I Construction (Lindquist)
• Field Change Orders/Contingency Liens/Change Requests
5. WBS 2 LIGO Lab Operations
• Administration (Lindquist)
• Sites (Raab, Coles, Shoemaker, Sanders)
• Detector (Whitcomb, Coyne)
• Campus Research Facilities (Weinstein (40 Meter), Libbrecht (TNI), Zucker(LASTI))
• Data Analysis and Computing (Lazzarini)
6. WBS 3 and 4  Advanced R&D and LIGO II (Sanders)

Special Items: STATUS OF S1 START,  REPRISE OF PAC 12 MEETING

Special Announcements:

Weekly Report Highlights
 

LSC Issues (Weiss)

no report

LIGO I Construction/LIGO Laboratory Administration (Lindquist)

LIGO Operations--Administration

There was no site teleconference held on Thursday, June 27, 2002 due to the PAC Meeting at MIT.

The list of current actions revised to reflect the status of open actions assigned through June 20, 2001 may be found at ACTION LIST.

Property Management

>From: Ed Chargois

No report this week.

DOCUMENT CONTROL CENTER (Turner, Mak)

>From: Linda Turner <turner@ligo.caltech.edu>

ACCOMPLISHMENTS No report (recently returned from vacation).

From: Cleveland Mak

• Processed and distributed one DCN.
• Electronic document activity was a bit overwhelming for the period.  Oover 75 documents were submitted for processing.
• More documentation being prepped to be filed away in the DCC shelves Progress continues on conversion of old charge account files to electronic form.

Press here to access the DOCUMENT CONTROL CENTER WEB PAGE.

From: Esther Cunningham <esther@ligo.caltech.edu>

Press here for ACCOUNTS PAYABLE HISTORY DATA .

From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>

• Issued PO to Church Dialing for the emergency work at LLO.
• Transferred funds on MIT to the proper accounts for payment.
• Completed change orders 109 through 116 to Triad which extended several individuals.
• Working on change order 17 to Support Services, which is expected to be completed today.
• Working on change order 2 to John Schiller to extend the one year lease on the rental house.
• Working on an RFQ package for LHO.

• Continued working on monthly reports.
• Submitted Cost Transfer for Central Engineering Shop Labor charged to FY2000 account.
• Did some preliminary analysis of information that may be requested for DCAA audit.
• Requested closure of some Construction and old Operations accounts.

 
• Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport

From: irena@ligo.caltech.edu (Irena Petrac)

No report (Returned from vacation on 6.27).

From: Ed Jasnow <jasnow@ligo.caltech.edu>
CONSTRUCTION:

• The contractor has not yet completed all work on the Livingston Staging Building. The re-heater has been fixed, and an air conditioning valve is being re-installed, but the wooden stage floor of the auditorium has not yet been repaired. That work is scheduled to begin on Friday, June 28. As a result, the contractor has still not received a check for his last invoice. Ed Jasnow was in Livingston this week to review the work, and had a check for that invoice, but brought it back since the work was not complete.
• The low bidder for the Hanford Laboratory Building audio/visual work has received a letter from the Washington State Department of Labor & Industry indicating that he has obtained the licenses necessary to perform the work. As a result, we have released a check for $25,000 for his first invoice.

• A safety audit will be conducted at Livingston during the S-1 run to observe safety procedures during an actual exercise.

SUPPORT (Baldon, Torres, Lloyd, Tischler) >Irene Baldon

• Processed the paper work for three (3) new/revised trip and there are thirty-eight (38) trips (15 of which are for the SURF Field Trip) and there are 8 more yet to be ticketed in various stages of completion before ticketing can be done and paper work completed.
• Continue to worked on a couple of upcoming relocation trips and working with Ed Chargois for their household moving. Also continue to work on a number of long-term visits which will require long-term housing, etc.
• Completed three (3) Expense Reports and there are six (6) reports yet to be done. Contacted a couple of travelers who have outstanding Expense Reports due for previous trips. Asked for their cooperation in sending me their receipts so that the trip(s) in question can be closed.
• Reconciled forty-five (45) P-Card items last week which required numerous phone calls to hotels in order to track down which traveler incurred which charge and pulling each traveler's file to assure that charges are correct for each airline fee.  Assisted a couple of P-Card holders who were/are out of town/country with their reconciling and/or expense reporting.
• Worked on the preparation and distribution of the Travel/Vacation Itinerary for June 24, 2002.
• Performed normal recording and filing associated with Travel and Reimbursement.
• I continue to work with Dr. Libbrecht and the SURF student in regard to their Field Trip to LHO as well as performing miscellaneous duties as requested by various members of the LIGO Project here at Caltech and each of the two (2) sites.
• I continue to do MIT's travel to the sites for installation activities and also to assist them wherever possible.

• Processed the usual incoming invoices for payment. Tracked and followed up on invoice problems, and reviewed and recorded payments processed by Esther during the week of June 17.  For the total number of incoming invoices received for this period see "Cost Schedule Control Systems" report by Esther Cunningham.
• Processed the usual requisitions and change orders on-line.
• Continue to monitor contract and blanket order encumbrance and notify task managers when supplements are needed.
• Completed update of PO Log Books.
• Jim continues with data entry in the LIGO database and helping out in the DCC.

• Submitted a list to V. Kondrashov of LSC documents to be posted on the web page.  Completed updating the LSC roster with information given by the organizations to I. Petrac.  Awaiting updates from Louisiana State to complete this roster task.
• Resumed updates to the LSC-ALL alias, should be complete by next week.  Arranged a telecon for the Burst Upper Limit Group.
• Completed arrangements for SURF student eye exams and laser training, sent out reminders for same.  Organized a special training session on 6/27 in the SCR.  Thanks to the IT folks, especially M. Pedraza, for connecting the vcr to the projector for the training session.
• Placed a few Pcard orders, and reconciled some.  Obtained price and delivery information for some orders.
• Finally got to the updates for the LIGO Personnel home information.  This task should be complete after I receive data from a few stragglers.

• Will be on vacation from June 26 to July 8. Contact Cindy for immediate assistance.

Advanced LIGO (Frey)

Progress Period from 06.21 to 06.27

Accomplishments:

• Weekly Advanced LIGO Project Controls meeting was not held this week.
• University at Glasgow (UG), cost proposal to PPark, regarding their fiscal involvement with Adv. LIGO.
• This week continues to be dominated with the preparation of detailed cost data for UG's cost proposal.
• Over the weekend I continued to correspond with Jim Hough and worked on the changes / revisions to the detailed cost data.
• Worked from home on Monday and generated last data needed by Jim Hough - Cost Profiles by UK FY.
• Tuesday and Wednesday I doubled checked data and corrected schedule changes bank into the cost sheets and posted to site.
• Advanced LIGO MRE Proposal (Highest Priority)
• Per direction of Gary, Dennis, David, and Phil, I am updating the presentation from November with most current data for meeting to be scheduled in July.
• Continuing the development of the Cost Estimate.
• The following is a summary of status by sub system:
1. COC - Work on action items per second review continues.  Garilynn had me run a schedule report for her to mark up and changes to costing are ongoing.
2. PSL - Prepared a spreadsheet for him to go through and markup for separating LIGO Lab scope from LZH scope.
3. AOS - Work on action items continues.  Next meeting date has not been scheduled.
4. IO -  Work on action items continues.  Next meeting date has not been scheduled.
5. SUS - All work in this area is focused around the UG proposal for PPark.  Continue to process update data provided.
6. SEI - Work on action items continues.  Next meeting date has not been scheduled.
7. ISC - Continue to work preparing draft data for Mike to review / fine tune during trip to MIT the week of July 15th.
8. LDAS - No data / feedback from Albert to date.
9. All other subsystems have yet to be scheduled for their first review.  These dates are pending per direction from Gary Sanders and Dennis Coyne.
• Continue to update the TNI Schedule and incorporate any changes.
• Continued work on revised work plan.
• Continue to update the LASTI Schedule and incorporate any changes.
• Nothing to report.
• Project Plan for the 40-Meter Lab Upgrade continues.
• Nothing to report.
• Cost Book Tool.
• ROSTER DATABASE:
• Continue work on my action items providing BK with needed data.
• The PHERKAB server was upgraded by Mike P. and we worked out connections issues.
• Resolved technical issue with Rita and BK's help.
• Worked with Irena, training her on how the Roster Database works.
• Prepared mailing lists requested by Rai and Dennis from Irena.
• COST BOOK DATABASE:
• Due to the PHERKAB upgrade, Mike was directed to change the password and user name.  I issued an email to all affected so that they know to call me for the user name and password.
• Gang of 5+:
• Followed up with Gina and Dot regarding purchase req. and they are happy with the way it looks..
• DCAA - Work continues on the incurred cost audit.
• Prepared / revised 3 transmittals for DCAA / NSF IG.
• Development of the Advanced LIGO Project Controls Guidebook continues.
• Project Web Site for posting schedule and progress related data continues to be updated with the latest and greatest.
• See http://www.ligo.caltech.edu/~tfrey/index.html

• Out of the office Friday the 28th, Will be working half day on the 4th, Out of the office on Friday the 5th.
• Next weekly Advanced LIGO Project Controls meeting is to be scheduled for July.  Subject:  MRE Cost and Proposal Development.
• Advanced LIGO MRE Proposal (Highest Priority Task)
• Highest priority is the development of the Cost Estimate.
• Will continue to pursue all other sub system schedules.
• PSL - Await input from Pete and will begin processing when received.
• AOS - Continue inputting changes to and prepare for next meeting TBD.
• IO - Continue inputting changes to and prepare for next meeting TBD.
• SUS - Continue inputting changes to and prepare for next meeting TBD.
• Will update the plan with progress through 5.31.
• Add cost data changes received.
• SEI - Continue inputting changes and prepare for next meeting TBD.
• COC - Work on action items by Garilynn continues.  Will begin schedule changes when data received.
• ISC - Travel planned to MIT for the week of July 15th.  Will continue work preparing draft data.
• LDAS - Will work with Albert to develop details.
• Will issue updated meeting minutes for every subsystem as action items from most recent review are completed.
• Will Continue to update the TNI Schedule and incorporate any changes.
• Will finish revised work plan with new data.
• Will update the plan with progress as of 06.28.02 and  post to site by the 3rd.
• Will Continue to update the LASTI Schedule and incorporate any changes.
• Will update the plan with progress as of 06.28.02 and  post to site by the 3rd.
• Will continue updating the 40 meter schedule and incorporate any changes.
• Will update the plan with progress as of 06.28.02 and  post to site by the 3rd.
• Roster Database
• Will continue to work with BK and executing action items.
Cost Book Tool development continues.  (Highest Priority Task)
• Mapping and formatting of OPS cost data for input will now continue with co-operative agreement approved.
• Will continue to work with BK executing action items.
• Gang of 5+
• Will continue to work on procurement guidelines.
• Will continue to provide support to PL for DCAA / NSF IG audit(s).
• Will continue the development of the Advanced LIGO Project Web Site.
• Will continue the development of the Advanced LIGO Project Controls Guide Book.

• We are assembling (slowly) a draft of the quarterly progress report for the end of May.
• Preparing responses to IG audit requests.  Three provided this week.
• Attending PAC 12 at MIT this week.

The following additional change requests have been submitted:
 
 

We have scheduled a CCB meeting Tuesday, July 2, 2002 at 1:30 PDT.

From: Cindy Akutagawa <cindy@ligo.caltech.edu>

• No report.

Quality/Safety (Tyler)

• Nothing significant to report this week.

LIGO Hanford Observatory (LHO) and Interferometer Operations (Raab)

Summary of Commissioning Activities at LIGO Hanford Observatory (compiled by F. Raab)
-------------------------------------------------------------------------------------
(see ilog for details - if it's not in the ilog, it didn't happen...)
 

Both interferometers now lock for many hours at a time. We are treading lightly about making any changes unless not doing so threatens the S1 run. The DAQ stability is improving. People are verifying channels needed for the run actually work. Isabella has been pushing hard on burst injections and Keith Riles has been clearing up DMT issues here. Many thanks to John Z., Szabi M. and M. Landry for their contributions to preparations.
 

4k IFO investigations
---------------------
We are doing much less investigating and much more running. The recent progress has been good, but the machine behavior is spotty. The 4k will be disappointingly stubborn to lock for hours at a time and then it jumps into lock repeatedly and easily. Last night we had an 8-hr locked section after hours of frustration. Large, low-period ground shaking (sub-microseism) due to earthquakes was evident in both IFOS and likely explain this bout of bad behavior. Earlier in the past week, Rana diagnosed one problem - a marginal phase in one of the loops - and modified filters to improve the phase margin. Bill Kells has now identified a saturation in one ETM that is not mirrored by its twin in the other arm. We will monitor these conditions as we run. Michael Landry is fixing software for the MC autlocker and the autocalibration functions.
 

2k IFO investigations
---------------------
The 2K locks most of the time, except when taken out for a reason. It appears to run pretty well even during construction hours. Partly this is a sign of greater stability and partly a sign that the nature of construction activities has changed. Clearly the added angular stability of the end masses helps CM robustness a lot.
 

FACILITIES
------------------
The audio visual contractor started to work in the auditorium. Most of the
painting in the office area is complete. Sheet rock is 90% installed in the
entire building. All but two windows are installed, all the storefront
glass and the clearstory windows are installed. The contractor is working
on the HVAC instrumentation.
 

LIGO Livingston Observatory (LLO) and Interferometer Operations (Coles)

Interferometer and preparations for S1: A DMT "school" was held Wednesday evening at 8 pm to go over the newly installed DMT software at LLO. Approximately 30 people attended. John Zweizing, Szabi Marka, and Ed Daw presented various monitors and alarms and provided overviews of how the can be used during S1. The new state vector software was installed and is now functioning except for the MC lock bit, which Chethan is trying to fix today. Chethan set up the DMT Sun Blades in the control room with the new Gigabit ethernet connection (see below). Work continued with the development of digital filters for optical levers and wave front sensors. Andri Gretarsson and Andrew Weber  temporarilyinstalled a half-wave center-feed 25 MHz dipole antenna behind the electronics racks in the LVEA. This is intended to act as a veto channel for RF bursts in the band near the main light modulation frequency. The receiver is tuned to 24.485446 MHz (in AM mode) and the signal can be accessed on channel L0:PEM-LVEA_MAGZ. The signal is AC coupled, and has a lot of line frequencies.

CDS: Installed the Sun Blade 1000's in the control room. currently they are running on 10 base T. One of the machines also has a Gigabit ethernet to run as a DMT machine. Preparing for S1. Moved a couple of directories to a different disk to prevent disk from going to 100% full level. State Vector installed at LLO. Working with Mike Landry at LHO to install the MC Auto Locker and Auto Calibrator code. Developed a web - epics interface for the LDAS Big Brother screen and installed at LLO. Operators can monitor the state of the LDAS workstations / network from an medm screen on the control room machines. Dave Barker will transfer it to LHO. Similar system for CDS is being investigated.

LDAS:
* Moved tape robot to dataserver from tapecontrol;
* Fixed the one event problem with the slope code found by Alan
Weinstein (slope code crashed when only one event was found on a
segment); working to fix another problem: when the slope code finds too
many events on a segment, LDAS timeouts without finishing the job: the
solution would be to make a node communicate the results to the database
more frequently to avoid the 600s communication timeout (currently it is
done only once at the end of the job);
* Configured new S1 databases LLO_S1 and LHO_S1 for backup.
* 16 old nodes are shipped to MIT.
* Mark suggested to incorporate LDAS BigBrother screen into medm tool
that operators are using instead of dedicating a separate PC to
BigBrother screen. Chethan has already implemented it. There is now an
'LDAS' button on the main menu screen of medm.
* Received two UPSes. Dataserver and taperobot are now plugged through a
UPS.
(Igor)
 
 

Seismic: Detailed the remainder of the HEPI actuation package.
Procured Machined springs for LASTI.
Worked on Machined spring Iterative convergence analysis to justify final results
Worked on fabricating parts for the Machined spring Failure test.
Worked on machined spring compliance model
(Marcel)

Drawings are nearly ready for release. Marcel is doing his final check and I will follow. P&N Machine shop in Houston is clearly the low bidder, and using our earlier bid package has agreed to order material this week. They will begin cutting metal as soon as we give them the drawings. I've been hounding Hyspan for bellows quotes; they tell me this week that they've lost our file and need to begin anew!! Provided all info again and they promise a few days. Completed the initial batch of nozzles and delivered requested quantities to Stanford and Parker. Follow up with Parker demonstrates a few questions about the calibration procedure - they will call into our Friday telecon for answers. PEPI Fixtures designed by Larry being fabricated here. All ancillaries ordered and received.

Raghu and I measured coherence between signals from accelerometers placed at various locations in LVEA and End stations (accx at BSC2 vs accx at other locations) . The measurement was made in 0 - 20 Hz. The data shows one broad envelope in 5-15 Hz concentered ~10 Hz, and another envelope in 15 - 20 Hz, with many spikes respectively. This pattern is quite different from the coherence between signals from seismometers placed at similar locations at LVEA at LHO. The difference is most probably because the seismometers were placed on the floor whereas the accelerometers were attached to the vacuum chamber's pillar. (Sany)

New Building: The final punch list items for the staging building were negotiated with the contractor and should be completed within a week. At this time we can occupy the building and we have started moving some furniture, completed the main communication connection and are housing all of our summer students in this new facility.

Safety: LLO Safety Made requested changes to M020253-01-L-LLO MACHINE SHOP SAFETY RULES and passed onto Gerry for review and release. Registered Laser user list has been checked and updated preceding S-1. Quarterly safety memo prepared and circulated (G020274-A-L). Had a tedious tutorial of the Laser Safety Interlock system provided by metropolitan Electronics. Katrina, Gary and Harry volunteered to be guinea pigs and begin exploring the system and defining operators scripts. (Gerry, Dennis, Marcel and Joe)
HEPI

Other: The LTIF telescope was delivered today. There are still some peripheral computers and eye pieces to be delivered, but the main components arrived and are now in air conditioned storage on-site.
 

MIT (Shoemaker)

PAC 12 held at MIT [GHS]

Detector/Technical Support (Whitcomb, Coyne)

40 Meter Interferometer (Weinstein)

• Summer REU students: all five students have arrived and are hard at work.
• Dennis Ugolini is at MIT giving a series of lectures on LIGO to high school students participating in their summer research program there.
• Suspended mass mode cleaner (Ugolini, Miyakawa, Vass, Abbott):
• After some improved alignment, Osamu and Steve saw a decent error signal from the mode cleaner length control servo. From it, they estimated the finesse to be quite low (~10), presumably due to clipping by the alignment slits and irises.
• Osamu, Steve, and Marcus removed the alignment slits and irises on the three MC suspended optics. Afterwards, the optics required some adjustment. Now, fringes are nice and bright. They will do a fine alignment tomorrow.
• The MC transmitted light is being monitored by a camera and photodiode while we attempt to lock.
• Ben used tester boards to check the epics control and wiring of the 1Y2 rack, with the exception of the LSC PD interface. Tomorrow he will check that board, and make sure all is well. Later, he will check out the EPICS controls for the WFS devices, PZT steering mirror drivers, QPD boards, etc.
• Ben found a problem with a railing amplifier in the MC length servo board. He has replaced the board with a spare, and is in the process of configuring and checking it out.
• SURFs Marcus and David are checking out the actuation paths from the MC servo to the PSL (VCO) and to the MC2 suspended optic.
• We should be ready to attempt lock by the end of this week or early next week!
• Ben has the remaining two QPDs for use on the mode cleaner beams, and they will be tested and delivered tomorrow. These will allow us to check and log changes in the alignment and beam position/angle.
• All the MC EPICS channels need to get into the DAQ for logging. This should be ready by the end of the week, requiring a DAQ reboot.
• A second mirror was mounted on the optical port on the north end of our MC beamtube, allowing our mounted Watec camera to view both MC1 and MC3; the view is a bit confusing, bujt adequate.
• Suspension Controllers (B. Abbott, Heefner, Taylor, Ugolini, Miyakawa):
• The digital suspension controller (DSC) system is working well on all three mode cleaner suspended optics.
• SURF Ilya has calibrated the sensor, coil, pitch and yaw readbacks on the suspension screens by moving the mirror pitch and yaw (with the EPICS screens) and observing the beam move 13 meters away on a ruled alignment slit.
• The serving of DSC epics channels died a couple of times during the week, requiring reboot of the DSC system. We still need to learn the origin of the occasional loss of epics communication with the DSC, and how to most gracefully recover from it.
• Optical sensing (Smith):
• Mike is assembling and pricing a parts list for all the remaining optical sensing trains (for the main IFO). The plan is to order all these in the coming month or 2.
• Several elements of the in-vacuum components require design work, including the faraday isolator and MMT mechanical structures, and baffling.
• Mike will design some motorized in-vacuum devices that can place a ruled slit, irises of varying sizes, or ND filter, in front of the optics, as an aid to alignment and diagnostics.
• Mike will modify the ACad optical layout to include QPDs in all output beam paths. These were in an earlier version of the drawing, but were taken out as we waffled over whether they were needed or desired. Now we think they are definitely needed, so they'll be put back in.
• PSL (Ugolini, Abbott, Miyakawa, Vass): The PSL has been behaving stably for the last week. Osamu and SURFs Aya and Marcus have made measurements of the beam profile and size in the IOO path (after the PMC and before the periscope into the IFO) with the BeamScan. The results are being analyzed in comparison with the design model; and more measurements will be taken in the next couple of days. It is likely that mode matching into the MC is in need of serious tuning.
• Optics (Billingsley, Armandula): Helena has arranged for the shipment of all of our polished core optics to REO for coating. She is travelling to Boulder to observe. The ITMs and ETMs have a 60mm coated aperture in the center. The coated region will be about 62mm in diameter, and it will have a feathered edge about 1mm all around, leaving us 60mm diameter full thickness coating in the center. Coating will actually start on 9 July.
• Computing: We continue to see network problems, which cause EPICS communication from scipes to hang (requiring reboot), and (maybe unrelated) cause EPICS screens to (frequently!) hang and connections to be lost. Very frustrating!
• Facilities and vacuum envelope (Vass, Jones):
• Larry has designed a storage rack for the 29" adjustable bellows spool piece that we must remove to work on the MC optics. CES is making it now; it should be done by the end of this week.
• Several of the parts for the SP&MC table cover are being reworked at CES; should be done by mid-next week. The remaining 5 optics table covers are in CES for manufacture; estimate 1-2 months.
• Installation of new replacements for our two turbopumps is on hold; Steve is too busy with the mode cleaner and other things.
• South Annex Bake Ovens (Taylor, Cardenas):
• Lee has cleaned all the parts for the in-vacuum 2" Dynamical Light Systems mirror mounts, and they are being baked; should be done by end of this week. Lee will assemble 10 of them next week.
• Bob continues to work on the 2nd new large bake oven F. It's almost complete; he awaits a calibrated leak.

Thermal Noise Interferometer (Libbrecht)

This week we opened the vacuum chamber so that we could balance the

power between the two arm cavities. In the current setup, the North

Cavity receives only about half the power that the South Cavity gets,

and we would like the power going into both to be equal. Also, we are

throwing away about half of the available power in each cavity, and we

would like to use the maximum amount of power available to maximize our

optical gain. (This is an artifact of the Faraday Isolator we installed

to reduce the crosstalk between the cavities. The polarization of the

beam as it comes out of the Faraday Isolator is 45°, and it needs to be

horizontal for all of the power to go through the circulators at the

inputs of the arm cavities. When we installed the Faraday Isolator, we

did not have a spare half-wave plate and vacuum-compatible mount to

correct for this, but we are able to correct for it now.)
 
 

While we were adjusting the power, we also decided to do some

long-overdue maintenance on the mode cleaner, including fine-tuning the

OSEM heads and repairing some blown LED's. Unfortunately, the mode

cleaner became misaligned during this operation, and we now have to

realign the whole interferometer. This may not be as bad as it sounds,

since we have lots of practice doing it.
 

LASTI (Zucker)

LASTI (Goldman, Harry, MacInnis, Mason, Mittleman, Ottaway,
Rollins, Shoemaker, Zucker)
===============================================================================
VACUUM ENVELOPE: Functioning normally.
 

PSL (Jamie): No news, continuing work on intensity stabilization.
 

EXTERNAL PRE-ISOLATOR DESIGN/FAB (Ken, Myron):  Several skids of welded and
machined parts arrived this week. One housing has been recieved
which has not been completed. We will use this for a fit check of parts as they
arrive and for several magnetic field shielding tests (Megan is doing these, see
below).
 

A stiffness analysis of the completed structure with all stiffeners was done in
Algor. The stiffness of the wall in which the hydraulic and electromagnetic
actuators mount is 5.25e7 n/m.
 

MIT Facilities has retiled the flooring in the student lab to prepare
for the hydraulic pump system.
 

Our mechanical lifting screw (to be used in the lift for gently
swapping in the EPI) is being retrofitted at the manufacturur
to add a keyway and torque restraint to the lead screw.  As
shipped it had unconstrained rotation which led to complications
in the rigging.
 

EXTERNAL PRE-ISOLATOR TEST & MEASUREMENT (Harry, Ottaway, Goldman):
We have made measurments of transfer functions on LASTI's HAM 13 to
determine the feasibility of using SHREPI**
 

** the SHaker-Reaction External Pre-Isolator concept, envisioned as
        an adjunct to PEPI; previously called Reaction Damping for HAMS
 

as a short term solution to the
seismic problems at LLO.  The horizontal to horizontal xfer function
looks similar to the one David Shoemaker measured at Hanford above 5 Hz.
The horizontal to vertical force to velocity xfer function was measured
to be about a factor of 30 lower than than the horiz-horiz.  It is
proving difficult to measure anything below 5 Hz because of seismic noise.
We will try using a geophone instead of a Wilcoxon accelerometer when one
is available.
 

We began assembling the housing for the actuator, so we can make magnetic
field tests on an in situ MEPI.  Trying to extrapolate the effect of the
MEPI on a test mass from bench top field measurements is proving to have
so many assumptions that measuring directly will be more reliable.
 
 

Streckeisen breakout electronics boxes were completed to the LSU design.
 
 

QUAD PENDULUM PROTOTYPE (Mittleman):
 

I have been continuing the work of resolving the discrepancies between
the MIT quadruple pendulum and its model.  In particular there are two
high frequency modes which have not been adequately understood, there is
a transverse/roll mode at 5.6Hz and a longitudinal/pitch mode at 3.9Hz.

Data Analysis and Computing (Lazzarini)

Simulation and Modeling (Bhawal)
E2E Physics meeting
----------------------
We discussed about noise curve from SimLIGO model, comparison between
E2E and FFT and measurement of seismic correlation at sites.
 

LLO site seismic motion measurement
-------------------------------------
Sany Yoshida and Raghuveer Dodda of SLU have started the measurement of
seismic motions and coherence measurement at LLO. They sent preliminary result
to Hiro.
The coherence measurement showed different results than the one done by
Bill Butler at LHO (LLO data showed strong coherence at higher frequency
than that at LHO). They started discussion to understand the reason for the
difference.
 

SimLIGO
---------
(Matt) Finished initial optical lever damping model. Cleaned/debugged
SimLIGO boxes in preparation for initial release, which now includes the
following noise sources: seismic, thermal, shot, frequency, intensity, analog
electronics and digitization effects.
 

(FFT & E2E)
-------------
(Biplab)
- The problem (reported last week) of FFT giving power values more than
the maximum attainable ones was avoided by setting the maximum allowable
integration error values more stringent. After that FFT and e2e agreed well with
each other at least for the hot matched case and a number of not-understood
differences between E2E and FFT got eliminated.
- One aspect that makes E2E and FFT values different is observed to be
astigmatism arising for the fact that the beam falling on beam-splitter is of
elliptical shape and thus has different diffraction losses in x and y
directions. However, this effect is not so important and negligible as compared
to actual mismatch effect in presence of large mismatch.
- Numerically still there are differences in between E2E and FFT
especially for sideband power values (mostly in higher order modes) at various
ports (when mismatch level is high) presumably due to finite number (m+n=4) of
modes used in E2E.
- Checked that calculation upto 2nd order would be enough for as-built
LIGO in hot state (with optimally well-matched beam) .
- Next task is to know the actual operating condition of LIGO in its hot
state and its mismatch level and how much it differs from the designed state.
After that it would be possible to give an estimate of the accuracy of E2E's
prediction in hot state.
 

Code development and maintenance
------------------------------------
(Hiro) Development of the modeler code for SimLIGO is continued.
(Ed Maros) Continued on improving build-e2e script.
 

Alfi
-----
(Bruce)
  - Made ports with local defaults more apparent to user.
  - Disallowed connections between incoherent data types.
  - Fixed connection path toggling.
  - Various minor connection and comment problems.
  - Started work on sorting boxes by directory in the main container tree.
 

(Melody)
  - Continued working on the automated tester for alfi5.
  - Working on additional sorting choices for the Find dialog.
 

LIGO Data Analysis System
 

Software Systems (Blackburn)
The past week has been dominated by issues within the mpiAPI component
of LDAS. This is the component used to start up and monitor the parallel
jobs running on the LDAS Beowulf clusters. There was a patch made last
Friday to improve the startup overhead for these parallel MPI jobs. The
patch reduced the startup overhead from an average of about 40 seconds
per job to about 3 seconds per job. However, this patch introduced a
long list of other bugs. Some of which didn't show up without actively
running jobs through the system for more than 48 hours continuously.
Over the weekend we did such long runs and fortunately identified this
problem. We also identified a rare socket bind issue in the mpiAPI from
the long weekend runs which required changes to the managerAPI. The last
really big bug in the mpiAPI was associated with properly cleaning up
and reinitializing search user accounts on the Beowulf. This bug was
hard to identify in a health LDAS/LAL environment so it only showed
up on June 26th. It has now been fixed. A minor issue was also identified
on June 26th with the level of debug logging information being returned
by the wrapperAPI. We will require running with the debug level set to
verbose for the science run due to lack of time to make necessary changes
and tests. The debug level will not effect jobs, only increase the amount
of information being recorded in the logs.
 

In the Tuesday LSUG meeting this week, a very different view of how jobs
would be run was layed out. This mode requires lots of little search jobs
using very few nodes each. In order to accommodate this mode, we had to
bump up the number of assistant managers allowed to concurrently run in
the LDAS system from 10 to 20. Two days of testing have not identified
any
major problems with this change.
 

The databases at all the sites have now been updated to support the table
design requested for the science run. We will be making a new set of
tables
the defaults to support the science run later today or tomorrow morning.
 

The tagging of LDAS in the CVS repository as the official 0.3.0 has
begun.
We will be checking out this tagged version of the code and building it
for distribution this afternoon. Compile times are now close to 6 hours
so
it will be this evening before we have the release ready to push to the
sites. We will also need to clean up disk space and reset various
counters
before the run starts.
 

In the second SLUG meeting this week, we discussed the plans for
installing
the tagged version of LAL and LALwrapper, as well as plans for any needed
changes to this software base during the run. A ramp up plan was also
discussed
to test out the run schedule over the weekend.
 

At the present time, it looks like a upper-limits reduced data set of
frames will be generated during the science run. These ULRDS frames will
like have less than 10 channels of data within them.
 

Our current best estimate of the success rate for jobs submitted to LDAS
is
over 99.9 percent failure rate. However, no testing has been performed
with
the new search code jobs and no testing has been carried out with
concurrent
search jobs while ULRDS frames are built. There is a FILO bug in the
frameAPI
which could become a problem under the real science run usage which we
just
haven't had the tools or guidance to be able to rule out as a potential
for
significantly higher failure rates. We will have to watch closely as the
jobs ramp up on LDAS at the sites.
 

Hardware Systems (Anderson)
Caltech
-------
(Dan Kozak)
 

* Worked on HPSS migration.  Besides reworking the scripts to do the job
   to better suit the new environment (i.e. much more disk cache) I also
   spent time working with STK on failed Redwood drives.  This is ongoing.
 

* Confirmed that double interswitch FC links deliver about 75% more
   performance than a single ISL (~175Mb/sec vs. ~98Mb/sec).  In some
   modes, this was highly asymmetric (writes were a lot faster than
   reads), but going back to a single ISL only brought the writes down,
   not the reads (i.e. it became symmetric).  Clearing and resetting all
   the switch zoning fixed this but after further experimentation the
   problem cropped up again.  I'm working with Sun to fix or at least
   understand this.
 

(Al Wilson)
 

* Setting up Apache for Solaris Systems. Currently running on Linux.
* Late minute tweaks for Big Brother for the Science run.
* Getting RH 7.3 ready for updates.
 

(Stuart Anderson)
 

* Worked on fixing several problems with the DMT machine at Caltech
(saiph)
   as this is needed to finish copying the E8 data into the archive and
   to get ready for the S1 data.
* Changed LDAS sshd configuration options to plug the recently announced
   openssh security hole.
 

MIT
---
(Keith Bayer)
 

* Removed some old data from E450 /export which was full.
 

Livingston
----------
(Igor Yakushin)
 

* Moved tape robot to dataserver from tapecontrol.
 

* Fixed the one event problem with the slope code found by Alan
   Weinstein (slope code crashed when only one event was found on a
   segment); working to fix another problem: when the slope code finds too
   many events on a segment, LDAS timeouts without finishing the job: the
   solution would be to make a node communicate the results to the
   database more frequently to avoid the 600s communication time-out (currently
   it is done only once at the end of the job).
 

* Configured new S1 databases LLO_S1 and LHO_S1 for backup.
 

* 16 old nodes are shipped to MIT.
 

* Mark suggested to incorporate LDAS BigBrother screen into medm tool
   that operators are using instead of dedicating a separate PC to
   BigBrother screen. Chethan has already implemented it. There is now an
   'LDAS' button on the main menu screen of medm.
 

* Received two UPSes. Dataserver and taperobot are now plugged through a
UPS.
 

Hanford
-------
(Greg Mendell)
 

* Final preparations and tests of the tape robot/library system were
   completed at LHO and LLO.  The tape robot/library system was moved last
   week at both sites to a host computer directly attached to the T3 disks
   via fiber channel and QFS.  This increased the data rate to 8-11 MB/s.
   The tests ran for over 72 hours; the only errors were media errors due
   to a bad spot on one of the tapes.  The tapecontrol script is ready to
   archive the S1 at the sites to tape.  Logs for the tapecontrol script
   will be at these URLs:
 

http://www.ldas.ligo-
wa.caltech.edu/ldas_outgoing/tapecontrol/logs/clientlog.html
http://www.ldas.ligo-
la.caltech.edu/ldas_outgoing/tapecontrol/logs/clientlog.html
 

* Coordinating with the groups organizing the writing of RDS frames and
   injections data to archive this data and preserve this data on disk at
   the sites after S1.
 

* Of the 64 new beowulf cluster nodes at LHO, 62 are running.  Two are
   experience hardware faults.  The supplier has been contacted about the
   problems.
 

* The network interface for the beowulf, datacon, metaserver, and
   dataserver LDAS hosts were upgraded on the LDAS network at LHO to
   Gigabit Ethernet on Mon June 24.
 

* The 16 old beowulf cluster nodes at LHO were shipped to Caltech this
   week.  This was organized by Ed Chargois, and government property tags
   for this move have been noted.
 

Data Analysis Activities (Lazzarini)
 

For The Weekly Report: June 27, 2002; Data Analysis Update:
 

1) Sukanta Bose and two graduate students from Washington State
University visited LHO on Wed June 26.  I gave them a mini-LDAS camp
presentation (using presentations for previous camps) to help them get
started writing search code to run under LDAS.
 

2) Worked with my SURF student Brian Cameron who is writing LALapps code
to test LAL functions and to generate synthetic data sets to study the
maximum likelihood estimator for amplitude and phase modulate periodic
gravitational-wave signals.
 
 

General Computing (Wallace)
MIT:
(Keith)
-Helping setup for PAC meeting
-Troubleshooting wireless card problems.
Lisa has worked up a number of details that
can explain some of the problems people have.
-Setup Ultra10 in visitor office
-Upgraded patched apache webservers
-Migrating ilog services to new webserver.
 

Livingston:
(Shannon)
-In process of setting up 12 computers for SURF students.
-Ran 35 CAT5 cables in the new building and installed two network
switches.
-Connected wireless to new building.
-Installed two additional 48-port patch panels in the new building.
-Updating operator check list.
 
 

Hanford:
(Christine)
- Running around like crazy providing user support for people arriving
for the S1 run as well as SURF students, staff and new long term
visitors.
- Created new user and e-mail accounts for LSC members working on S1, new
staff and new visitors.  Purchased 3 more PCs for new staff and new long
term visitors.  Loaned one guest PC to CDS for a SURF student project.
- Generated a report of T1 usage for most of June for Albert.
- Continued stripping personal files off old PCs.
- Renewed the Sun maintenance contract for the GC and CDS main servers.
- Continued with network plans for the new building and for the LSC
conference in August.
- Worked with Larry and Richard on getting more bandwidth for the site.
 

(Larry)
-Received a short term proposal from PNNL to increase the WAN bandwidth for the
Observatory. After discussing it with Albert it looks like a go if there are no
major logistical issues. We should get more bandwidth at no additional monthly
costs. There will be some h/w purchases in $2K-$3K range.
 

(Lazzarini)
We have received a initial quote from PNNL for the cost of upgrading
the connections at Hanford between LHO and PNNL from T1 to ethernet.
This will permit us to immediately use more than T1 bandwidth, likely at
no additional monthly cost. It also provides us with an upgrade path to OC3 when
the time and budget permits. Larry will procure the interface hardware
to replace the T1 transmit/receive hardware.
 

CIT:
(Mike)
-Installed additional engineering software for surf students.
-Worked on documentation on 2000 server to submit to sysadmin FAQ.
-Rita was having printing problems with a printer on the third floor. The
queue was backed up on the third floor due to big print job that caused
this printer to jam up good; this took awhile to get back online. This
printer is not good to run big print jobs. The printer I am referring to is
HP3 located in room 357.
(Please don't send large print jobs to this printer) We have the 4500 color
and 5000 B/W that can handle these types of print jobs with ease.
-Worked on going through all the PC servers looking into security logs and
search for mischief behavior because we had suspicious users trying to log into
servers. I also was looking into some performance issues that were
displayed in Event Viewer.
-Setup Ethernet data connection and switch with Larry for the conference
room at Bridge Annex.
-Ran multiple tests with Larry and Veronica to insure future transmitted
meetings through VRVS would output a better quality in regards to video and
audio.
-Had to do some more troubleshooting on Pherkab due to a HTML link that
was not working on Thomas Frey's website. This had me digging deep into the
access database to correct the problem. It turned out to be a permission
problem on the database it self. Once I corrected this issue everything
seems to be working,
-Loaded server 2000 on for the sysadmin group for testing purposes.
-Started working on upgrading Antares to 2000 server.
-Started loading a PC for Linda T. to replace her old computer.
 

(Lisa)
-SURF student support
-Configured a demo web mail system that uses SSL.  This uses a commercial
product from sendmail for the web interface.  In order to setup the SSL I
configured my development server to be its own certificate authority.  Built
a test web page and will be asking a few people to test it out while building
the production system.
-Assisted Mike resolve a problem with the web interface into the costbook
database.
 

(Larry)
-Multiple purchases. A number of monitors to accommodate various office
situations. A few PC's for the labs and SURF students.
Purchased a SUN server to replace the unit given to John Z. which is a
replacement for a Blade1000 unit that lost the motherboard.
-Met with the Mathworks sales rep., he will be sending information that should
help with some of the license issues we've been having. It should also get us
the licenses at a cheaper cost.
-Worked with a number of SURF student issues. Mostly computer setups.
-Debugged a few network problems.
-Worked with Stuart debugging a few computer issues. We had two SUN Blade 1000
units go down about the same time. One needed a CPU replacement and the other is
just dead.
-Worked with Mike on a few PC issues.
-Still working on the sandbox units. Two of the units are being rebuilt with
Solaris 9. Alterf now has additional s/w tools for Hiro and his group to test
out.
-Worked on getting CIT site-license s/w for Livingston. The CD's are being
shipped this week.
Not all CIT site-license s/w may be used at the Observatories but there are few
that can and they are being utilized.
 

(Veronica)
- LIGO website: added and installed a new section to the Students
Programs, Graduate Students Int'l Programs. Edited and posted
much-anticipated LIGO group photos. Updated several other LIGO webpages.
Worked with Rita on document conversion for MOUs.
Attended a seminar about digital media archiving software.
Incorporated a few modifications into the Press & Media website, as
feedback arrived.
Working on the announcement webpage for upcoming LSC August meeting.
With Mike and Larry, tested the setup for videoconferencing and put it to
use for a SURF lecture.
Worked with DCC on several documents to be added to the database.
- CaJAGWR website: updated links to the last seminars.

LIGO II/Advanced R&D (Sanders)

From: Phil Willems <willems@ligo.caltech.edu>

Fused Silica Fiber Research:
----------------------------
 

We have installed tiltmeters on the optical table for the vertical bounce
experiment.  We will use them to monitor any drift of the table during ringdown
measurements that may cause the gain of our sensor to vary.  We are now
performing absolute calibrations of the tiltmeters. (Corinne Lamb, SURF)
 

We are checking the accuracy of our multiple pendulum models for Q prediction
prior to designing an experiment to confirm the prediction of nonlinear
thermoelastic damping. (Jaap Weel, SURF)
 

We are developing a program to build dumbbell-shaped fibers on our automated
glassworking lathe.  We have already designed uniform fibers to the Advanced
LIGO length (60cm) and diameter (760 microns) with excellent uniformity and
reproducibility.  We will now work on pulling the middle dumbbell region. (Lisa
Fukui, SURF)
 

From: Mark Barton <mbarton@ligo.caltech.edu>

    This week I took delivery of a dSpace controller system for use with
the suspension controls prototypes and started familiarizing myself with
it. It hadn't been ordered with a PC (required for running the user
interface and cross-compiler) and the ones available within LIGO were
marginal in terms of speed and memory relative to the requirements so I
ended up ordering one through Larry Wallace.
 

    Also I finished validating my Mathematica suspension model for
asymmetrical cases. After auditing and cleaning up all the code that
involved 3D rotations, it turned out that, as I suspected (see report of
5/17), the output was strictly correct according to the convention
implied by the setup of the problem, but that this convention was
misleading and unhelpful for cases with static angular displacements.
Specifically, a non-zero value of the component of an eigenvector
corresponding to the "roll" of a body doesn't mean a differential angular
displacement about the space x axis as one might naively suppose. Rather,
it implies a rotation about the body x axis, which is above or below the
space x axis by the amount of any static pitch. To make the results more
interpretable I defined matrices that can be applied to eigenvectors to
convert the angular displacements to a more convenient, orthogonal basis
consisting of the space z, y and x axes.
 

    Interestingly however, that doesn't reduce the roll-yaw coupling to
zero in all cases. It turns out that when the spurious effects are
removed there's still a physically real dynamical coupling from roll to
yaw proportional to the static pitch and the difference between the x and
z moments of inertia.

From: ctorrie <ctorrie@ligo.caltech.edu>
SUSPENSIONS

Janeen and I have been visiting several machine shops in the Pasadena and Los Angeles area. We are asking them to quote for supplying some cantilever blades and a welded cage structure, all for the Mode Cleaner suspension. This was a opportunity to investigate what type of machine shops are in the area. it is obvious that each of these locations would sub-contract sections of the work to other local companies.

Larry Jones has re-checked some of the drawings for the MC suspension and these have been submitted to Mike in Central Machine Shop.

With information, supplied by Mark Barton, regarding the sweet spot for the magnet w.r.t. to the coil windings I was able to finalise the design of the flag and draw an assembly drawing for the OSEMs.

3 prototype OSEMs arrived from Glasgow and the LED's etc.. are currently being installed. These assembled prototypes will be sent to Glasgow, Stanford and MIT and a final discussion on the design will be held on July 8th at the LASTI MC Controls Prototype testing meeting

There will be a demonstration of software by Go Engineer, the suppliers of SOLIDWORKS, at 10 am on 2nd of July in the ECR.
 

From: GariLynn Billingsley <Billingsley_G@ligo.caltech.edu>

In an attempt to measure the size of the inclusions in CSI sapphire (they appear somewhat consistent) we had our microscope representative in  this week.  We were still not able to resolve an inclusion at 100x  There was a reasonable image at 50x, but it still had diffraction rings and was very tiny in the field of view.  This puts the inclusion size somewhere in the 2 micrometer range.  Our microscope vendor felt that there were still options in microscopy, but that there was a steep jump in the cost of the upgrade.  A scatter or loss measurement may be the best way to go.

The 120x80 a-axis piece, which has many inclusions, will ship to UWA this week for scatter analysis.
 

From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>

Alessandro
Accelerometer paper first draft reviewed by Ric, back to editing

Akiteru
No news.

Eric
Made X-rays with the Veterinarian machine and mammography film,  there is much, much less spatial variation than in the dental setup.  Used a calibration ladder for calibration of linearization scale.  Working on perfecting the system.  Soon ready for first quantitative measurement.
Trained Stefano on melting and splatting.
Testing brazing strategies with Ric,  no good so far.

Stefano Tirelli SURF student
Learned to prepare MoRuB melts, manufacture it in spheres and splat.  Made a few successful splats with Eric.
Learned to use EDM machine and successfully cut the first MoRuB strip.  Obtained somewhat rugged edges, next time will try sandwitching the splat, then will try polishing or etching the edges.

Hareem
vacation

Aso
Still working some on calculating the tensioned flex joint spring constant.
Concentrating on an LCGT  report on the possible design of a suspension point interferometer for LCGT using the top mirrors at high power for GW  High Frequency Interferometer and the bottom one at low power for Low Frequency.
Many advantages,  two interferometers with anticorrelated noise, the lower one with low power just where there is the minimum of thermal  conductivity available, the higher one, that being at high frequency needs little seismic isolation, directly collegated with spaghetti to the thermal source but acting at low frequency as an active seismic isolator.   Problems with yaw and pitch control noise from standing forces, pitch soluble, yaw to be studied.
Studying the possibility of actively cooling the suspension thermal noise, a long shot.

Mike
Heat capacity setup  cabled to the computer and DSP.  Dummy calorimeter puck wired.  It works magnificently with the dummy puck,  now will tune the software before passing to the real (fragile) microcalorimeter.
Thermal conductivity measurements.  Continuing problems with failed measurement points.  Finally traced the source of the problem It is a fit failure due to too short data acquisition windows.  Should be easily solved by doubling or tripling the length of each data point.  We will also take three measurements at each temperature.

Kelin
Found and ordered vacuum connector feed through for cryostat.
Working on Q- measurement setup in cryostat.
Procuring and building parts for fiber light injection in Cryostat.

Ric
Picked up braze work from Hareem, found that Au92Si18 is quite different from Au18Si92.   Oopps.  It happens, now Au92Si18 melts at 390oC, close to the expected 363oC.  Not successful in brazing MoRub yet.  Also we will need to fine tune the braze to hit 363oC.
 

For additional information about this report, contact sanders@ligo.caltech.edu