Weekly Report for Week Ending June 7, 2001

The LIGO Executive Committee Agenda for Monday  June 4, 2001 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:   Joy Fan update

Special Announcements:

Weekly Report Highlights
 

LSC Issues (Weiss)

no report

LIGO I Construction/LIGO Laboratory Administration (Lindquist)

No site teleconference was held on Thursday, June 7, 2001.

The next site telecon is scheduled for Thursday, June 14, 2001.  The list of current actions revised to reflect open actions assigned through May 31, 2001 may be found at ACTION LIST.

From: Ed Chargois <chargois_e@ligo.caltech.edu>

• Provided additional Property Tags, Sequence Number G3200 thru G32500, to the LIGO Hanford Observatory (J. Berry), Account Number P182442.
• Assisted the Directors Office (W. Tyler ) with the shipment of several return items to Progressive Marketing Enterprise, Brea, Ca. Account Number P182421.
• Assisted the Detector Group (K. Mailand) with  packing and shipping of two (2) Tri-Pods, a camera, and several items of hardware to the LIGO Livingston Observatory (R. Riesen), Account Number P96937.
• Assisted the System Administrator with packing and shipping of three (3) Sun Computers with LIGO Property Numbers and Serial numbers (C20080 Sn: 702F06B4, C20140 Sn: 646F0F9, and C20148 Sn: 630F057A) to LIGO Hanford Observatory (D. Barker), Account Number P182498.
• Assisted the CDS (N. Mavalvala) with the packing and shipping of a PZT Electronic Controls, Mdl: E500.00 Sn:05140598 to the LIGO Livingston Observatory (P. King), Account Number P182834.

>From: Cleveland Mak <mak_c@ligo.caltech.edu>

Web pages for the DCC give simple how-to's for document numbering, easy access to the latest on-line documents, and search capabilities for the DCC database. Take a look. . .

ACCOMPLISHMENTS

• Spent time searching for old documents in the DCC archives.
• Electronic document submittals continue to come in at a hot and steady pace. 38 documents were processed this reporting period.
• Processed, copied, and distributed 1 DCN.
• Linda will continue to be out of the office for the next 2 weeks.

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

Press here for ACCOUNTS PAYABLE HISTORY DATA.

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

• No report this week.

• Completed and posted the Operations Report  for the Fiscal Period Ending 9/30/01 as of May 2001.
• Sent out report on status of TAMA account as of May 2001 to Ricardo De Salvo.
• Continued working on refining new report format for R&D.
• Completed report on Mendell grant as of May 2001 and requested correction of salary charged to incorrect POETA.
• Requested correction of expenditure type and POETA for electrical work for Seismic Array at Livingston.

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

• HPD: Release of NSF approval package (incorporating full-up SOW) is pending receipt of Contractor's concurence of CO No. 02.
• CSI: CO No. 06 for additional sapphire samples (De Salvo) was released to Purchasing.
• WP (formerly GO): CO No. 08 for re-polishing of a number of LIGO core optics was released to Purchasing. WP received a verbal go-ahead and an advanced copy of the CO to expedite the job.
• EGO: Subcontract, indicating respective obligations and cost sharing regarding the LIGO/EGO collaborative development of advanced optics coating technology, was forwarded to EGO for sign-off.

• No report (vacation).

Support (Wood)

Advanced LIGO (Frey)

Progress Period from 06.01 to 06.07

Accomplishments:

• Weekly Advanced LIGO Project Controls meeting held on Monday, June 4th 1:00pm at LSCR to discuss SEI MRE Cost Estimate and Schedule.
  • Focus of the meeting was the review of SEI cost and schedule data.
  • Meeting initiated SEI group's request that I travel to LLO to work with them and to complete the input.
  • Processed travel request and travel arrangements for travel to LLO from 6.24 to 6.30.
• No Meetings with the DCAA .
  • Prepared transmittal cover letters as Phil requested them (5 total)
• Advanced LIGO MRE Proposal (Highest Priority)
  • Continuing the development of the Cost Estimate.
  • Continue to pursue all other sub system schedules.
  • Working on the SUS schedule and expanded scope for all IFOs.
  • Added a revised SUS list to the website for the SUS page.
  • Continued changes to the AOS cost and schedule per review meeting.
  • Continued changes to the COC schedule per comments by GB and review meeting.
  • Issued meeting minutes for SEI review for comment.
  • Prepared revised WBS structure for SEI group.
  • Continued the integration of the IO cost and schedule data.
  • Continued to file all documents and prepared a MRE cost review notebook.
• Will Continue to update the TNI Schedule and incorporate any changes.
  • Updated the plan with progress as of 06.01.01 and  posted to site.
  • Sent out requests for progress as of 06.15.01 due by Friday the 15th.
• Will Continue to update the LASTI Schedule and incorporate any changes.
  • Updated the plan with progress as of 06.01.01 and  posted to site.
  • Sent out requests for progress as of 06.15.01 due by Friday the 15th.
  • Incorporated changes requested by David S. to add additional milestones to the milestone report.
• Project Plan for the 40-Meter Lab Upgrade continues.
  • Nothing to report.
• Continue to test the Cost Book Tool.
  • Continue mapping and formatting of OPS cost data for input.
  • Testing changes implemented by BK.
  • Meeting scheduled with BK on Friday morning to discuss detail reports.
• 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

• Next weekly Advanced LIGO Project Controls meeting will be on Monday, June 12th 8:00am at LSCR to discuss IO MRE Cost Estimate and Schedule.
  • Focus of the meeting will be the review of IO cost data input into the Cost Book.
• Will continue to provide support to Phil regarding DCAA data requests.
• 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.
  • Will initiate the updating of the COC and AOS schedules.
  • Continue input of changes to the AOS cost and schedule per review meeting.
  • Continue input of changes to the COC schedule per comments by GB and review meeting.
  • Continue the integration of the IO cost and schedule data.
  • Continue working on the SUS schedule and expanding scope for all IFOs.
• Will Continue to update the TNI Schedule and incorporate any changes.
  • Will update the plan with progress as of 06.15.01 and  post to site by the 19th.
• Will Continue to update the LASTI Schedule and incorporate any changes.
  • Will update the plan with progress as of 06.15.01 and  post to site by the 19th.
  • Will incorporate  any additional changes provided by David
• Will continue updating the 40 meter schedule and incorporate any changes.
  • Will update the plan with progress as of 06.01.01 and  post to site by the 9th.
  • Will incorporate any additional changes provided by Alan.
• Cost Book Tool development continues.  (Highest Priority Task)
  • Will finish ops cost data input.
• Will continue the development of the Advanced LIGO Project Web Site.
  Will continue the development of the Advanced LIGO Project Controls Guide Book.

David Shoemaker has provided a final draft of the Advanced R&D Annual Report.  Elizabeth Wood has "submitted it through NSF’s easy-to-use, user-friendly FastLane (TM, all rights reserved) system."

We held a Technical Review Board (TRB) on May 18th to discuss design and placement aspects of an office/laboratory building at Hanford.  Minutes of the TRB have been prepared and distributed (LIGO-T010065-00-P).

Press for the latest Contingency Needs Projection.

From: Kris Duncan <kris@ligo.caltech.edu>

• No report this week.

• I am working on gathering all the information for the monthly reports on the Construction and Advanced R&D accounts for May 2001. Since some of the reports have been put into a new format, I will email information on their location as soon as they are completed them.
   
• I continue to reviewed the open encumbrances on the Construction and Advanced R&D accounts to see if the requested removals have been made. I will continue to review these accounts weekly until all encumbrances have been removed (Remember, I can only get these errors corrected if the Task Managers point them out to me)..

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

• No report this week (vacation).

Quality/Safety (Tyler)

No report this week.

LIGO Hanford Observatory (LHO) Operations (Raab)

No report received

LIGO Livingston Observatory (LLO) Operations (Coles)

The LVEA and lab air handles have been running well since Monday.  Motors from the  west end stations are at the motor repair shop to have bearings replaced and re-packed. We have learned that the bearings within the motors, which are original equipment, are not the same grade of bearing as called out by the manufacturer on the motorplate but are a lower tolerance bearing (ABEC 3).  We were able to locate the bearing specified by the motorplate (ABEC 5). Motors from the south end station are already installed after having been rebuilt.  Rich Riesen oversaw the bearing replacement of the 4 air handler motors at the Electric Motor Service Co. assuring replacement was done to factory spec. The actuators which control the blade pitch on the fans have been temporarily set at max-air flow. We still need to investigate what prevents the 4-20 mA controllers from operating the pitch control. Also, there is some concern about the effectiveness of the lubricant used in the bearings, a teflon slurry in a low vapor pressure fluorene base with the trade name Braycote. We have received various and conflicting reports about the effectiveness of this and how it should be packed into the bearings. We believe a study by the project of this or alternates is warranted so that we don't have a recurrence of this problem. We understand that JPL has some experience with this material and recommend that the project contact JPL to learn what their experience has been.

Following the re-start of the LVEA HVAC, the LVEA X-arm spool piece was removed. Moved IOT1 and ISCT1 for HAM 1 door removal. The spare rubber tips for the earthquake stops were machined. ISC survey equipment is being set up on the LVEA  X-arm. The small bake oven is being assembled and  checked out before an upcoming OSEM bake. OSEM photo diode response characterization is in progress.  Removal of the MC1 and MC3 is now in progress.

We have experienced a major rain storm at LLO which dropped about 6 inches of rain on the site in about 12 hours. By late Wednesday, the rain had overtopped the state provided access road, and the road was submerged by several inches by Wednesday evening. This confirms our suspicion that the height of the road may be less optimal. However, in spite of the heavy rain, the site erosion control system of collection ponds and pumps worked very well so that there was no flooding problem on-site.

Detector/Technical Support (Whitcomb, Coyne)

See also the daily electronic logs for the installation and commissioning activities:
Hanford Detector Log
Livingston Detector Log

1.1 LHO INSTALLATION & COMMISSIONING

2km

Late last week, we discovered that one of the OSEM wires had drooped into the reflected beam. We estimated that it was obstructing enough light that it could be a danger to the optics at high power and would interfere with proper operation of the wavefront sensing alignment system for the modecleaner. On Monday we vented the diagonal section removed the west door from HAM7 and tied up the wire so that it was out of the way. The system was closed up again and pumped down. The vacuum returned to the previous level in about 2 days, so the time lost until we can open to the beamtubes is minimum.

The operation was a success. The clipping has been eliminated and the modecleaner alignment did not change at all. The total time at atmosphere was less than 3 hours and the modecleaner was locked again less than 3.5 hours after Betsy took her hands off the table. Could be that we are getting better at these things.

A brief summary of the commissioning highlights:

• We have measured the length of the 2 km modecleaner and it is within 0.1 mm of the design length.
• EOMs have been aligned to minimize the residual amplitude modulation.
• A quick look at the small optic suspension ringdowns showed that they are all greater than 10 minutes. Nothing obviously wrong.
• Measurement of the PSL frequency noise with the modecleaner shows a 3-10x improvement between 100 and 1000 Hz that had been seen earlier with the 4 km laser. It appears that the new layout is a success.
• A number of the small optics underwent large shifts between atmospheric alignment and in-vacuum orientation. However, none were too large for the controllers to bring them back. The modematching telescope has been aligned and a good beam delivered to the interferometer.
• The PRM has been aligned, and the Michelson has been locked with the RM misaligned. Anecdotal impressions are that the optics appear to be quieter than they were before. Possibly attributable to the new OSEMs, or maybe something else.

4-k Commissioning

The 4 km PSL and modecleaner are back on line. The PSL premodecleaner gave up this weekend, when its piezo mirror broke loose from its epoxy bond. This premodecleaner was scheduled for replacement anyway, due to high losses, so Rick swapped it out and realigned the beam into it.

• The final cabling for IOT1 is nearly in place.
• EOMs have been aligned to minimize the residual amplitude modulation.
• 4 km PEM cabling is underway

1.2LLO INSTALLATION & COMMISSIONING

Commissioning

Malik Rakhmanov and Sany Yoshida are both at LLO to help with the IOO work. They are preparing to make  measurements on the mode matching telescope with a Shack-Hartman wavefront sensor.

In preparation for the re-alignment associated with the OSEM replacement, Mike Smith and Ken Mailand shipped a COS autocollimator camera mount, a laser adapter, two tripod/ video camera mounting assemblies to LLO. The SOP for the 4Watt laser in the LLO LVEA was revised.

All OSEMs for LLO have been received. Approximately 20 units are to be vacuum baked this week.

It has been determined that the MC2 mirror must have its magnet/standoff assemblies stripped off. The MC2 suspension is in the optics lab. Re-processing will start soon.

2.0 OtherEngineering and Scientific Activities

2.1 Design/Analysis/Fab

Optics

Wave Precision (formerly General Optics) has the optics for rework of several of the mode cleaner mirrors. We have one spare 4KMCCM at CIT which apparently has high scatter, the only other spare 4KMCCM is headed for re-work at WP, it also has high scatter. One of the Mirrors (a 2KMCCM) has significant divets, enough that WP thinks it's cheaper to start with a new blank rather than try to re-work this one. These type of glass blanks run ~$300, perhaps we should have a supply on hand since glass manufacturing times are long. [Comment by Coyne & Whitcomb: Good idea; We will do so.]

Physical plant will be lowering the sprinkler heads in the Metrology lab to below the level of the false ceiling. I am trying to persuade them that they don't need to cut a hole in the metrology tent to put a sprinkler inside the enclosure.

PSL

• A replacement pre-modecleaner (PMC) for LLO has been fabricated.
• Mindrum Precision have apparently had problems in trying to super-polish the 1 in. diameter fused silica substrates. The substrates, to be used for PMC mirrors, are now a month late.
• I still haven't received any news about when we can expect 10-W laser S/N 110 back from Lightwave, despite being told that they'd get back to me as soon as possible.

Sander Liu

Placed an order of one high voltage pulser from DEI for LHO

Sander Liu

• Digital Suspension Controls: Shipped three (3) BNC version of the antialiasing filter chassis to LHO for the digital suspension controls.In the process of building two (2) LEMO version antialiasing chassis.
• LASTI - In the process of building one LEMO version antialiasing chassis for the system.
• In the process of ordering parts to build six (6) additional LEMO version antialiasing chassis. It is unfortunate that the chassis we've been using all these days is no longer available from VERO's USA distributor. We are currently looking at the possibility of engaging a local manufacturer to fabricating them for us.

Mark Barton

I spent several days up at LHO struggling largely unsuccessfully with the 4k DAQ system, trying to get suspension controller tuning validated for the SOS. I've also been writing up some results on the effect of the magnetic Kovar seals in the photodiode and LED devices in the OSEMs for David Shoemaker.

Rolf Bork

• Working with Rich Abbott on testing clock driver modules, in particular the sections which drive ICS-110B ADC modules.
• Lori is presently modifying the DCU code to use either ICS-110A or ICS-110B ADC modules. This is to allow us to make use of the older ICS-110A, which we have on hand, in the DAQ system for DSC coil output signals.
• Hongyu is continuing work on adding anti-aliasing filtering to the dataviewer. This is to allow for proper decimation of signals being viewed when the requested view sample rate is smaller than the actual data acquisition rate for a particular channel.

Mike Zucker

• Photodiodes: shipped 4 tuned & characterized LSC PD modules to LHO for the 4k. Ordered new photodiodes to allow Rich A. to finish production. In the meantime another order by Rick K. evidently just came in, relieving the shortage. Our InGaAs photodiode supplier (formerly EG&G Canada Optoelectronics) was bought out by Perkin Elmer and is now increasingly difficult to buy from, routing us through a third-party distributor in England and charging 3.5X the previous unit price.
• Photon calibrators: Sadly, the too-good-to-be-true price quoted last week for photon calibrator lasers turned out to be just that; another zero appeared before the decimal point when we asked for it in writing. Back to plan A.

LHO4k further modified to operate with Digital Suspension System (DSC). Major change is to remove the ISC supervisor processor and to install a Motorola162 CPU directly into the LSC front end crate to act as the EPICS interface. Primary reason for this is to remove EPICS traffic from the LVEA ISC reflected memory network (this is how the ISC supervisor communicated EPICS data to/from the LSC/ASC front ends), since this network now carries real-time control data to the DSC from the LSC and ASC front ends.

• Flavio is making headway setting up a test for the timing system. An ADC board has been prepared with code for standalone running and the timing signals it generates will be analyzed against the LIGO timing board to look for discrepancies.
• Mohana is testing the DC readout module, and has started a new batch (2) of modecleaner servo boards. One of these boards will replace the board in the LHO 2k, and the other is to be installed at LLO in conjunction with some wiring and VME crate changes.
• A teleconference with MIT was held to iron out some remaining details with the Photon Recoil Calibration System. Mohana is working on the write up of the system requirements.
• Rich prepared a work estimate for the next three months and produced a preliminary board count of about 83 boards to be built and tested. Effort is underway to bring in some temporary board stuffing help to get things rolling.

Rolf Bork

• Modified LHO4k software to operate with DSC. This included the same mod of moving the EPICS interface into a Motorola162 CPU directly in the ASC front end crate.
• In the present LHO4k DSC at the end stations, VMIC5588 reflected memory cards are installed for direct connection to DAQS. This was done to allow them to be tested stand alone. However, given that:
  1) These units are expensive to replicate in DSC in all mid/end stations (~8K/copy)
  2) There are very few DSC DAQ signals at the end/mid stations (12 each)
  3) There is already a separate reflected memory net (VMIC5579) back to the ASC front end in the LVEA.
  4) The ASC front end has plenty of processing time remaining, the ASC front end code is being modified to receive the DAQ data from the DSC end station units on the VMIC5579 net and transfer the data to the DAQS network, along with its own DAQ data. The VMIC5588 modules in the DSC end stations will then be removed from the LHO4k and will not be required in future DSC installations.

John Zweizig

On Monday, Daniel and I installed a Blade-1000 at Caltech that will be the DMT development and offline detector characterization platform at CIT. This machine is being used this week by DMT Trainees at the LDAS/DMT boot camp. The rest of this week has been devoted to instructing the Boot-Camp attendees.

Ken Mailand, Mike Smith

The D970308 integrated layout drawings (six sheets) for the LHO interferometer are being revised to reflect the current as-built design configuration.

40 Meter Interferometer (Weinstein)

• Last week, we turned on our MOPA laser for the first time. The reference cavity (RC) has been in place for several weeks, and is still being pumped on. We will shortly switch it to ion-pump only for the rest of eternity. The remainder of the PSL equipment arrived and was put in place during this past week. Layout by Mike Smith: D010092.pdf.
• Peter and Lee put all the optics and electro-optics on the table, including the pre-mode-cleaner (PMC). They coarse-aligned the beam up to the reference cavity and the PMC. By far, the trickiest was the double-passing of the beam through the frequency-shifting AOM. Peter and Lee have been putting in lots of hours - many thanks!!
• All the PSL electronics is now in place, including the IOC (VME cpu), ADCs, DACs, FSS servo board and reference oscillator, PMC servo board and reference oscillator, all power supplies - some borrowed from Peter's lab, VCO for the AOM, temperature controllers, etc. Paul Russell has wired up the crate and is now laying the cables from the crate to the table. He should be done by the end of today (Thursday); he does beautiful work!
• The PSL IOC finally arrived, and EPICS PSL screens are working fine.
• In the next week, we'll get the beam through the RC and the PMC by ramping the laser frequency, and Rick and Paul, with the help of Rich Abbott, will check out all the electronics (sensor -> servo -> actuator and sense voltage -> adc -> epics -> DAC -> control voltage chains, and servo board functionality).
• Ben and Jay are putting together the cables that run from the PSL rack to the DAQ rack.
• Then, on to a full characterization of the PSL performance during the summer, with the help of SURF students.

PEM (Ugolini, Abbott, AJW): The IOC for the particle counter and other misc RS232-readout devices is back in service. Work on other devices (weather station, STACIS controllers, RGA, etc) begins next week.

Vacuum control system (Ugolini, Vass):

• At least one (maybe all) of our ion pumps apeear to belch more hydrocarbons than they suck. Maybe they weren't regenerated adequately by Varian. Still under investigation.
• Steve is systematiccaly running for a day each with different combinations of pumps, to see if all the acheived total pressures and hydrocarbon partial pressures hang together. Meanwhile, we keep pumping out the water, and acheive total pressure below 3e-7 torr with all pumps going.
• Dennis still has a few misc items to take care of before we can declare the vacuum control system completely complete. All minor stuff.

• Larry is getting more quotes for the small pressure balanced expansion joint needed for the 12m mode cleaner (to replace the gimbals currently in hand for the vacuum envelope). They are too high; so Larry is considering a re-design using an old trick by Ron Drever.
• Allied has cleaned all our parts, and will test and bake in the next day or two. Hope to have everything shipped back to us next week!
• Still plan to install the bulk of the vacuum envelope changes in July, with all the rest in the fall.
• Larry has ordered the six small optical tables needed for the 40m, and work on the custom supports for these tables has begun at CES.
• Larry awaits a response from LASTI on what they need in the way of in-vacuum kapton-coated ribbon cables and feedthroughs for the suspension OSEMS (and all other in-vacuum electrical components), then will place their order along with ours (it's an expensive and long lead time item).
• Larry and Steve continue to explore options for improving the floor anchors for all vacuum chambers.

ISC (Mike Smith): The WBS dictionary, development plan for the AOS, ISC, and IO sections of the 40m IFO Upgrade are being revised to better represent the division of effort on the 40m project.

Facility (Vass, Abbott): Fixes to control room chairs should be hear in a week. Ben and Dennis assembled the last control room desk.
Computing: Two new PCs arrived at the lab, and monitors for our sun blades are expected any day now. One of our old PCs needed a system rebuild; thanks to Mike Pedraza for doing that. John Zweizig will help set up our DMT machine as soon as the computers are set up, and the Frame Broadcaster is up.

Thermal Noise Interferometer (Libbrecht)

No report received.

LASTI (Zucker)

LASTI (MacInnis, Gray, Laliberty, Miller, Radkins, Shoemaker, Rollins, Mittleman, Harry, Ottaway, Mason, Mason, Barker, Zucker):

HAM seismic installation: Internal support table, support tubes and bellows are all installed.  Everything went smoothly except for two dinged bellows flange seals, which were reworked and polished out.  HAM is now waiting for leakcheck to complete the external support assembly.

BSC seismic installation: Support tubes and bellows are all installed and big ends on bellows are now being torqued. One flange ding was repaired on the BSC as well. External support structure is complete.  The BSC dome has been replaced and bolts are being tightened.  Pumpdown for leakcheck on HAM and BSC support tube bellows is scheduled for first thing Thursday morning 6/7.

MZ comment: Special thanks to Richland pros Hugh and Corey!

Cleanrooms and SEI/SUS assembly infrastructure: In the process of doing the BSC installation we found an unplanned interference which may complicate lifting of a future combined SEI/SUS assembly over the support structure.  Given the success of our structural steel cleanroom/work platform around the BSC, we're now thinking to extend the work surface southward, building out a mezzanine over the south beam tube.  This will greatly simplify the lift to bring an assembled SEI/SUS unit over the BSC, with the moderate inconvenience of doing the assembly and test work "upstairs."  Sketches and quotes are in the
works.

Controls: Dave Barker met with David Shoemaker and definitized the plans for control computer networking and installation (a.k.a. the "CDS side").  Dave B. has tentatively scheduled a visit to MIT for week of 6/25 to build the system infrastructure.

PSL: Dave O. is working through a list of boards/modules with Rick K. from Caltech to plan out the controls assembly.  Our laser is apparently still stuck at Lightwave waiting for service.

Data Analysis and Computing (Lazzarini)

Simulation and Modeling (Bhawal)

A new C++ programmer, Melody Araya has joined the E2E team..

Planning
---------
(Hiro) The details of the works to be carried out with the help of the detector experts were written and discussed with Dennis. A list of explicit item list will be sent to people supporting simulation asking for comments/suggestions/real works. All related information is available in the e2e web, action page, www.ligo.caltech.edu/~e2e/actions.

Weekly Physics meeting
----------------------
In this week's Physics meeting Virginio Sannibale presented his recent work on mechanical simulation of suspension system.  The minutes will be available in http://www.ligo.caltech.edu/~e2e.

Mode Mismatch
-------------
(Biplab & Hiro) sorted out what seemed to be a difference between theoretical prediction and E2E's results for mode mismatch in a Fabry-Perot cavity.   Conclusion is that both the theoretical derivation and E2E's results are correct and consistent with each other. As a rough idea, a 5% relative error in reflected 2nd order spatial mode power is observed for a 15% shift in the waist position from its ideal place. For smaller shifts, the relative error goes down.
Summation cavity results agree with those from a model using primitive modules (... and also theory) in both cases of 'on' and 'off' control loop.

PSD Estimator
-------------
(Andrea) Started to write down a PSD estimator based on a pre-whitening filter estimated using a linear predictor (Burg algorithm): this should make possible to automatically prevent biases in the estimation due to high spectral dynamics.

Frame interface
---------------
(Andrea) The Frame-E2E interface: Made it ready. Testing the code.

Alfi
----
(Hiro) The future of alfi was discussed. Because of the expansion of the scope of the alfi, it is clear that a revision from the groud-up is necessary. It was decised that the current version of alfi will be feature frozen on June 16th, and after that, only those bugs will be fixed which can be reproducible.  Major effort will go to a new version of alfi written in Java. The first version will have all the features of the current alfi, except for a few features which are rarely used and make alfi fragile. The class structure design will be done by Bruce, and Melody is gathering information of Java classes which can be used to draw items.

(Ed Maros) 1. Fixed problem where name of port was always dialog.
                   2. Put in file checking for absolute path resolution.

(Bruce) - Completion of initial implementation of Alfi path junctions.
            - Full test of new junction code.
            - Review of current implementation of full Alfi system.
            - Start design of new implementation of Alfi system.

(Melody) Started looking at the Alfi code and tried running the simulation program. Researched graphical packages for the Alfi  Java implementation.

LIGO Data Analysis System

Software Systems (Blackburn)

The software workshop has gone very well. There have been some start-up issues associated with available disk space and CPUs. A decision was made to use local disk space on the 6th floor Linux computers since 22 users of the sirius file server was too slow.  There was also an unexpected restriction to just linux computers for the attendees due to the lalwrapper software release for this camp not working on solaris. We shared 5 linux machines with close to 30 people which has worked nicely. Lots of good questions are being asked and it looks like the ldas/lal agenda will cover the desired scope of topics in their entirety.

Philip Charlton put in a heroic effort, learning how to develop a new search code for the lalwrapper this week for the workshop.  He will be lecturing on development of search codes using his search engine Friday. It calculates a different statistical moment based on the rank of the node it is running on within the LDAS wrapperAPI and sends the results to the statistics table in the LIGO database.

The release of LDAS has been a bit problematic. An old issue with user accounts and ssh configuration which originally showed up in the last MDC has re-surfaced mysteriously. Once it was understood that it was a system configuration problem and not the prerelease software that was the cause we were able to get back on track and do the testing.

There will be a thread safe version of the eventMonitorAPI which was worked out this week. The eventMonitorAPI was timing out a lot in the previous MDC and this was causing several started jobs to fail. With the new threading the time outs should be removed removing the eventMonitorAPI from the check list of candidate problems when a dataPipeline job fails.

Several logging problems with the controlMonitorAPI client were also fixed for this release. A couple of thread library support routines were also fixed up in the generalAPI shared object's library.

This will also be the first release of LDAS which requires the new tools in ldcg which were fully updated on Monday night of this week. We have moved to gcc 2.95.3 on both solaris and linux, having now rebuilt all the supporting tools and LDAS with this version. We also upgraded the LAM MPI library to version 6.5.2.  Both the gcc and the lam still require minor patching from us to provide a stable version of LDAS. [NOTE: we would not be able to make these kinds of minor but necessary customizations if we were using commercial compilers and libraries]. We also took this time to upgrade as many other development packages as possible (and were shown to work with LDAS).  The new "how to build LDAS" webpage will contain all the details on these new required tools once the release is finalized and pushed to the sites.

Hardware Systems (Anderson)

The MIT LDAS Engineering run Beowulf cluster has been ordered and is due to arrive at MIT next week.

The first T3 RAID disk failure has been repaired and understood.  There is a "feature" in the T3 that complains if you replace a bad drive with itself, or possibly another bad drive, i.e., it assumes that once you have removed a faulty drive that the next unit installed in that slot is a working disk drive, otherwise it incorrectly blames additional working drives for the resulting fault.

Additional network switches and cables where ordered and installed to support the LDAS and CDS bootcamps at Caltech this week.

Data Analysis Activities

Network Data Analysis Server(NDAS) Prototype (Benoit Mours, Szabi Marka, Roy Williams)

We developed a prototype NDAS system to start transferring, merging and archiving data from multiple IFOs. Presently the system connects and receives data Hanford, Livingston and VIRGO, while the central server is located at CIT. Other sites (e.g. GEO) can be added quickly and simply as soon as they can provide data. The system is based on a star geometry with the possibility of two way transfer for each node(observatory). We use double buffered transfers for optimal bandwidth utilization. To provide maximum portability between different platforms and flavors of UNIX we used standardized unix tools, ssh and C code to implement the system.

The data route starts at the observatories where a local servers (DMTs for LIGO) write the network dataset into local directories. These datasets must be greatly reduced due to practical bandwidth limitations.  They should cover the PEM channels with the highest chance of intersite coincidence (seismic, electromagnetic, line) and some form of the h channel. Practice shows that we should not count on bandwidths over 60Kb/s, which still gives us fair amount of reserve considering the ~20Kb/s rate of data written on disks. We use large datafiles (to optimize transfer rate) of 1000 1 second long frames per file.  The central server at CIT downloads the recent data from the observatories once in every 20 minutes, stores them on a local disk and merges the frames from the observatories into one single frame. The scripts also prepare exhaustive debug and overview information of the transfer and data, which is posted on the Web. All of the participating servers have access to the data on the central server to be able to prepare their own merged datasets and minimize bandwidth consuming duplicate transfers. The merged data than will be moved to the CACR archive for permanent storage. To maintain a robust system, which is insensitive to internet problems we have sufficient buffer space for 1-2 days worth of data at all nodes including the central server.

The implementation of the system will soon be moved to a HPSS node. We are also working on version utilizing Globus (GRID) software.

General Computing (Wallace)

MIT: (Keith)
-Attending ldas camp this week
-Installed RH7.1 on laptops
-Ordered Sun's for gc and cds project

Livingston: (Tom)
-We are setting up facilities for the summer students and guests.  We have received three Sun Blade 100s, and have ordered an additional three, for general use. Most of them will be installed in the Computer User's Room, where they will be available for general use.
-We are getting prices for an additional T1 line. So far it looks like the cost will be an additional $674 per month plus an installation charge.

Hanford: (Christine)
- Did a lot of purchasing for CDS, GDS, and GC.
- Helped users having problems with Norton Antivirus liveupdate.
- Restored several files from backups for several users.
- Restarted remote shell (rsh) on the main file server as a temporary measure to accommodate some file transfers using remote copy (rcp).
- Started looking into installing MRTG for network traffic monitoring.
- Cleaning up a couple of PCs that are being moved from one user to another.
- Cleaned off and setup another large bookcase for additional GC software and spares storage.

CIT: (Mike)
-Computer (M18) had a problem with 98 shutting down ended up having to flash the BIOS after loading all OS patches.
-Upgraded (M45) with more RAM this is P11 200 Mhz with simm slots only.  Liz Woods computer had problems shutting down. I installed the shutdown
patch for win98. It worked 'yes'
-Irena Petrac, had a compatibility problem with FrameMaker 6.0 users were not able to view her files because they are running FrameMaker 5.5. I installed 5.5 on her computer she is now running both versions.
-Florence Kaufman, computer (M51) I reloaded another computer for her with a full install plus configured her Oracle discoverer client and Webster.
Instructions for just go to this link https://tahoe.caltech.edu/oowa/ExpSrv620/dbxwascode/runwebsite?_XWA_1455 and download the citrix client and the install instructions.  Webster go to this link https://tahoe.caltech.edu/oowa/ExpSrv620/dbxwascode/runwebsite?_XWA_1455 and just create a shortcut to the users desktop or bookmark it.
-40meter, computer (M93) I reloaded OS win98 and full software install and setup a shared printer.
-Nergis Mavalvala, laptop (M89) I reloaded OS win98 and full software install.
-Ken Mailand, computer (M15) compatibility problem with Y2K pro and Autocad. I loaned Ken a computer loaded with Autocad until I reload his old computer in the morning with win98 install. Win98 seems to work fine with Autocad.

(Lisa)
-Ran the monthly backups.
-Installed the Pcard s/w for Nergis on her laptop.
-Rebuilt a number of Sparc 5 units. Three of which have been sent to Hanford at the request of Dave B..
-Worked with Larry on a couple of DNS issues.
-Reworked a couple of Ultra 10's and put them in their respective locations.
-Added a few more users (SURF students) and worked with Larry on adding a number of users for the LDAS workshop.
-Reinstalled the OS on the Blade 1000 for the LDAS workshop.

(Sam)
-Wow, This is my last one.  It is hard to believe.  My week has been full of stuff, mostly non ligo but nevertheless very full.
-I am currently trying to take my two finals that are required for me to graduate.  I have little enthusasium for the process, but alas it must be done.
-I went to work a number of days this week.  I fixed the CD rom in Phil's computer.  I fixed the Cd rom in Gina's computer.
-I worked on documentation.
-Worked on putting together anything that I have ever done that will make things easier.
-Slept.  Ahhh, this one is so nice:-)
-I think that is all folks,

(Larry)
-Worked a number of procurement issues. Including items for the 40M, Wilson House, and LDAS.
-Setup a number of accounts for the LDAS workshop. One item of interest was that the computer(sirius) was not able to handle the number of users all wanting to compile at the same time. This helps support our model of using multiple machines and having the users spread out over those machines for compute intensive work.
-Restored a number of directories and files for different people.
-Worked on a few calendar issues.
-Took care of a few printer problems as well as a number of PC issues.
-Helped Mike and Lisa move computers to various locations.
-Worked a number of network issues including setting up a new hub for the third floor.
-Worked on a number of issues concerning the laptops. Presently, all of the units have been checked out and we are working on rebuilding one more to add to the pool. The only operating system we support on the laptops at this time is Windows98.

(Barbara)
- Completed the costbook detail and summary reports.
- Installed web site changes for PAC meeting, LSC documents.
- Compacted the DCC databases and installed a new version of PubDocs.

[Bruce Sears]
-Ilog maintenance -- General maintenance.

LIGO II/Advanced R&D (Sanders)

PSL (Peter King)

• Working on the advanced LIGO systems design document, in preparation for the systems review on 3 July.
• The VME crate has been ordered. All the VME hardware is expected to be delivered by mid-July.

1. Installation: Hanford and Livingston

Nothing significant to report.

Nothing significant to report.

New osems for 40m, LASTI, TNI etc.: I dropped off pigtail parts to So. California Braiding on Friday. Taking a preliminary look, the representative said that it might cost more (~2x) to hand-twist and braid the partials from Pal Pilot than to make from scratch. We have an order in for more pigtail wire but do not expect to receive it until July 3 at the earliest. I'm scheduled to talk with the rep. again on Friday to determine what to do next. TNI needs their new osems by the last week in June and So. California Braiding has enough wire to make their pigtails. Todd Etzel will head to MIT next week to learn the osem assembly techniques from Myron and Peter. I'm waiting to hear from Mike Zucker about LASTI's osem delivery requirements.

:Helena and I are working with Thomas Frey on schedule and cost data for Advanced LIGO. The schedule, development plan and WBS dictionary are in good shape. Thomas needs to make some small changes to the schedule. We will start inputing cost data as soon as Thomas is available.

CSIRO is reporting on their polishing of our first "high quality polish" of a sapphire optic.

ROC
They hit the sag goal within 5 nm.  The requirement was within 10nm. (the spec is written in terms of a zernike, Z3, which is half the actual sag over the defined aperture, we asked for Z3 of 26 nm, this means a sag of 52 nm.  They report a Power, or sag of 47nm)

Surface Error
We asked for <0.8 nm over the central 120mm, we got 1 nm rms. We asked for <0.4 nm over the central 80mm, we got .6 nm rms
Keep in mind that they measured the central 80mm of (the LIGO1) 4ITM06 to be 0.62 nm rms and we measured it to be 0.18nm rms, which is at the noise floor of our interferometer.  So they may be getting a significant contribution from interferometer noise.

Microroughness
Our Goal was <0.1nm rms, our requirement was <0.2 nm rms.  The average microroughness over the surface was 0.18 nm rms, the report has a caveat about noise in the measurement, they feel the number is closer to 0.12 nm.

The CSIRO polishing report can be found at: http://docuserv.ligo.caltech.edu/docs/internal/C/C010237-00.pdf

A picture of the surface phase map taken at CSIRO can be found at: http://www.ligo.caltech.edu/~gari/LIGOII/sapphia1.gif

The spec can be found at: http://www.ligo.caltech.edu/docs/E/E000041-A.pdf

LASTI Data Acquisition System (Rolf Bork)

Continuing to build up LASTI system. In the process, making some code fixes/adds. Primary change is to get the system to reconfigure on command (button has always been there, but not functional because EDCU did not always respond properly). This required an extension to EDCU code and restart/reconfig code in data collection units (DCU). This code appears to be functioning properly and will be moved to the 40m system and ship with the LASTI system. Updates at sites are TBD.

SEI Position Sensor (Rich Abbott)

Rich is talking to the people at ADE Inc. in an effort to get the delivery of the first prototype Capacitance Position Sensor moved up. Also, there is an ongoing discussion as to how to do initial testing on the prototype.

TAMA SAS (Szabi Marka)

I spent 10 days at Tokyo University helping the 3m interferometer commissioning. During the second week I developed the prototype of DC control module for the 4 actuators (3 horizontal, 1 vertical) per tower. These DC Control Modules (DCCM) are used to balance the small, very low frequency variations in the IP and MGASF equilibrium positions due to environmental effects. The low frequency shifts are taken up by the voice coil actuators until the offsets reach a threshold, at which point they must be corrected by readjusting the balance spring tensions. Each DCCM module can digitize 8 analog signal inputs (4 differential) to read the coil currents. The stand alone microcontroller continuously monitors the load on all the coils. When the offsets are outside of the desirable region, it balances the system at the next lock loss or on a operator command. The motor drivers (4 to 8 per module) are controlled via an internal bus. The high resolution stepper motors are used in a microstepped mode, achieving 3200 steps/revolution. I submitted the final PCB designs for manufacturing and already received the microstepper boards. We expect to receive the microcontroller board Friday and finish the assembly of the production models early next week.

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

Our friends with their bigger brothers in Virgo have achieved 100 second locking in the central interferometer.  They beat us on having the first superattenuator or SAS suspended interferometry.  They are now going for hour long locks, and then they will soon replace the temporary injection bench with the independently tested  real one.  The superattenuators achieved less than 100 nm residual motion on the resonances!!!!  Congratulations to them for their success and get energized by them!  Giovanni will bring us lots of experience and ideas for the SAS startup in July.  Good news also for LCGT,  Virgo has proved before we could do it, that LCGT made a good choice in baselining SAS .

Florian
Moved to Hongo.

Virginio
will go around June 15th

Riccardo, Alessandro
Waiting for machined sapphire from Sonic mill and Faimond

Szabi working on 8 channel stepping motor controller board.

Yukioshi
Calculations on IP, measuring long term IP drift.  1 micron r.m.s. over minute(s)

Akiteru, (and others)
Schedule still slipping some,  now do not expect to have interference before Amaldi anymore.  Ordering some parts, finishing permanent IP Counterweights, got two ADC and DAC working on same DSP for full tower damping and mirror controls.  Replaced new coils in LVDTs.  Expected to have 1 tower completely operational by June 15th when Virginio arrives to help implement full feed back controls.  Laser injection bench is OK, will need little refurbishing.

Hareem
Analysing old Q-measurement data for GASFs.

Brett
Designing Memory metal actuator for IP.

Virginio,
Got GASF paper back from review panel, will submit it;  starting paper on MGASFs

Szabi
Work on IP paper.

Riccardo
prepared actuator paper, circulated to collaborators for comments.

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