The LIGO Executive Committee Agenda for Monday, May 7, 2007 will be:
(Meeting time: 10:30 am Pacific Time)
1. Announcements
2. Programmatic (Marx)
- End of April LIGO Operations Financial Review
- Change Requests (see Below)
3. Comments on Weekly Report
4. LSC and Data Analysis (Reitze)
5. LIGO Lab Operations
- Administration (Lindquist)
- Sites (Raab, Giaime, Shoemaker)
- Commissioning (Fritschel)
- Optical and Mechanical (Coyne)
- Control and Data Systems (Bork)
- 40m (Weinstein)
- TNI (Libbrecht)
- LASTI (Ottaway)
- Lab computing (
Anderson
)
- Data Analysis Group (Weinstein)
- Instrument Science (Gustafson)
6. Enhancements (Zucker)
7. Advanced LIGO (Shoemaker)
8. Change Control Board/Technical Review Board Session as needed
- Change Request CR070002 adjusts the budget to reflect actual hires in the first half of FY 2007 as well as corrections to actual payroll rates (salaries, raises, etc.) used in the FY2007 budget model.
- Change Request CR070003 realigns budget for the Advanced LIGO Seismic Isolation effort.
Site and other Business Issues:
Special Items:
Special Announcements:
Weekly Report Highlights
LSC Issues (Reitze)
First, an update on two LSC papers observational papers: the S4 all-sky burst paper was submitted to Classical and Quantum Gravity on Thursday; and the S3/S4 inspiral paper was posted on arXiv last week (http://arxiv.org/abs/0704.3368) and is waiting for comments from GWIC before submission to Phys. Rev. D.
In addition, a total of 37 LSC-related abstracts were submitted to the Amaldi meeting. Special thanks goes out to the Publication and Presentation Committee for carefully vetting the abstracts before submission.
Finally, plans continue for the upcoming LSC-Virgo meeting. Information and registration details can be found at https://pub3.ego-gw.it/lscvirgomay07/
LIGO Laboratory Administration (Lindquist)
STATUS OF LSC MOUs (Lloyd)
- The Inter-University Centre for Astronomy and Astrophysics MOU was signed-off this week with Attachments DAT and Z, and was posted and submitted to the DCC.
PROPERTY MANAGEMENT (Luna)
>From: Rod Luna <rluna@ligo.caltech.edu>
- Provided assistance to the Detector Group (H. Armandula) with packing and shipping of ten 2"dia. fused silica substrates to REO, Boulder, CO.
- Requested to change the expenditure type from "Equipment - Government" to "Supplies - Allocable" to on PO# S011848. This purchase is for a fan that is permanently attached to a building @ LHO.
- Requested to change the expenditure type from "Supplies - Allocable" to "Equipment - Government" on two P-Card Invoices: CP508081 and CP517234.
- Provided assistance to the Detector Group (H. Armandula) with receiving a Glass Mass from University of Glasgow. Account Number LIGO.PRLAS-5.16-NSFLIGO.FY02CA.
- Submitted a claim with the Risk Management Office to get reimbursed for the repairs of a GSA Vehicle @ LHO.
DOCUMENT CONTROL CENTER (Turner, Mak)
>From: Linda Turner - turner@ligo.caltech.edu>
- Scanned an additional 36 incident reports from Hanford, added them to the DCC database, and provided hyperlinks in the incident report spreadsheet.
- Worked with Bill Tyler on determining a schedule for review, edits, and release of both the Safety Plan and the Safety Program documents.
- Continued to work through responses from authors with pub citations.
- Collected some forms for possible use in a hands-on forms class next week at the PDF conference.
>From: Cleveland Mak <mak_c@ligo.caltech.edu>
- Requests for document numbers and submittals of past and current year's publications continue to pour in.
- Processed Advanced LIGO Internal Review presentations for the upcoming NSF Advanced LIGO Review in early June.
- Scanning Update - Progress continues on scanning of all non-electronic "L" category documents on file.
Update to Current Document Management System (Lindquist)
J. Giaime has prepared a web page for the committee with some instructions for accessing and running a copy of DocDB for evaluation purposes. There is no meeting scheduled this week.
FINANCIAL SYSTEMS (Funaro, Brambila, Kaufman)
>From: "Funaro, Catherine" <Catherine.Funaro@caltech.edu>
>From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
- Received the final certificate for Columbia University so the file is complete.
- Routed the change order to allocate funds for MIT through the approval process. The contract value is being reduced to match the allocations, so it will be re-submitted.
- Routed change order 185 for Triad. Requested a current Certificate of Insurance.
- Working on the change order to Myers.
>From: Florence Kaufman <fkaufman>
SUBCONTRACTS MANAGEMENT (Jasnow, Salone)
>From: Gina Salone <gsalone@ligo.caltech.edu>
- A proposal has been received from Australia National University for the design of a tilt tip stage for LIGO. A subcontract is being prepared.
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
- With the decision on the HAM seismic isolation system having been made, efforts are underway to prepare a package for NSF approval of the exercise of the an option in the HPD design contract which will call for the manufacture of two systems for two HAM's as part of Enhanced LIGO. The letter to the NSF has been drafted. We are now waiting for a proposal from HPD for the work, as well as a Statement of Work from the LIGO staff at MIT.
PROPOSALS and REPORTS (Lindquist)
Material for the monthly report that we provide to the NSF is due. I will provide an outline and a reminder of responsibilities. I need this by Friday, May 11.
CHANGE CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
- Change Request CR070002 adjusts the budget to reflect actual hires in the first half of FY 2007 as well as corrections. We will discuss this change request during the Excomm Meeting scheduled May 7, 2007.
- Change Request CR070003 realigns budget for the Advanced LIGO Seismic Isolation effort. I will distribute copies for possible discussion during the Excomm Meeting scheduled May 7, 2007.
HUMAN RESOURCES (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
- The next Staffing Committee meeting is scheduled for Monday, May 14.
LIGO
Hanford
Observatory (LHO) and Interferometer Operations (Raab)
Summary of S5 Activities
at LIGO Hanford Observatory (compiled by M. Landry)
The intererferometers achieved what are now typical and high duty
cycles and ranges: H1 - 89% at ~15Mpc, and H2 - 90% at a newly
restored, decent range of ~7Mpc (see the "timing fanout" bullet
below).
Some S5 highlights from the LHO elog are bulleted below:
LIGO
Livingston
Observatory (LLO) and Interferometer Operations (Giaime)
DC readout work for eLIGO (Valera Frolov):
- The output mode cleaner cavity (spare PMC cavity) was dither locked to the carrier light on the antisymmetric port with the interferometer locked at high power in FPRMI configuration. To achieve the stable locking and minimize the noise from the OMC length the bandwidth of the pushed to 350 Hz.
- One quarter of the dark port light was directed to the OMC by taking the beam from one of the AS port detection diodes.
- The offset of the order of several picometers was introduced into the differential arm degree of freedom to produce the linear coupling between the DARM and the power of the carrier light at the dark port.
- After setting the relative gain and checking the loop shape between the DC and the RF photodetector sensing chains, the DARM control was handed off from the acquisition PD (ASPD5) to the DC PD on the OMC transmitted port.
- After careful alignment of the OMC input beam with the ifo locked in high power state, the DARM noise at frequencies above the 200 Hz was mostly limited by the electronics noise of the DC photodetector (due to the LSC whitening limitation). The current DC readout noise is about factor of 50 above the S5 curve. The noise can be improved by modification of the DC PD circuit to match the LSC whitening input.
- The next step is to verify the noise coupling to the dark port in the DC readout scheme including the laser frequency and amplitude noise and the oscillator phase and amplitude noise.
CDS Computing (Lisa Bogue):
- spent most of the week working on LDAP.
- supported the blind injection project.
- working on orders for new equipment.
LLO Science Outreach (John Thacker):
- Planned, Developed and Delivered two programs for school visits (1 Middle School; 1 High School)
- Hosted the LA Math/Science Partnership Workshop on the evening of May 2nd. Dinner, tour of control room, Einstein's Messenger viewing and Exhibit Play were the program components for the 21 attendees. The 21 attendees represent the science curriculum leadership at various parish school systems and may prove helpful to our efforts to expand our reach.
- Held the LIGO SEC Directorate F2F meeting and addressed procedures for closing the current grant, developing ideas for the Next Phase and establishing bylaws for governance of the partnership.
LIGO computing and network security (Roddy)
--------------------------------------------------------------------
Reported under General Computing, see below.
General computing and LDAS admin (Giardina)
---------------------------------------------------------------------
Reported under General Computing, see below
Reported under LDAS System Administration, see below
Data analysis & computing (Yakushin)
---------------------------------------------------------------------
Storage/Condor/LDAS admin:
Reported under LDAS System Administration, see below
Data analysis:
Reported under Data Analysis activities, see below
Mechanical and Optical Systems (Coyne)
See Advanced LIGO
Controls and Data Systems (Bork)
See Advanced LIGO
40-Meter Interferometer (Weinstein)
- IFO commissioning, Electronics, controls, computers:
- The PSL has been free of glitches (in temperature or power) for the last few weeks.
- Steve put in some optics to reduce the PRM and SRM oplev beam spot size on their QPDs. New oplev lasers for the ITMs are on order, mounts and optics are in hand (mostly).
- As an aid to understand the anomalous losses in the arm cavities (at the 40m, and by extension, the sites), we will vent to drag wipe the test mass optics in the next few weeks. Tobin and Rana took "before" measurements of the arm losses. Steve, Rana and Rob have been honing their photographic skills, trying different cameras and lenses to get good, hi-res pics of the beam on the test masses. Rana ordered a framegrabber so that we can easily make digital pics of the optics with our video cameras.
- Tobin continues to commission the dither-alignment system. There is a new EPICS word derived from the lock acquisition state vector, to assist the system in determining which cavities are in lock and available for dither-alignment.
- DC detection:
- Rob is compiling a list of measurements to be made of noise couplings to DC and RF readout of DARM, from laser and oscillator amplitude and frequency noise, MICH and PRC loop noise, Mach-Zehnder noise, and input and output PZT steering mirrors. He's making cables and connectors to facilitate measurements of transfer functions.
- Ben has a completed DC photodiode board. Rob will test it.
- Vacuum squeezing:
- Go and Nergis have a first draft of a paper on the 40m squeezing experiment.
- Lab Infrastructure, Bake lab:
- The office remodeling is complete. The flow of chi is optimized. Tabula rasa reigns.
- Bob continues to bake parts for the LASTI SEI system; he sees the light at the end of the tunnel.
Thermal Noise Interferometer (Black)
While waiting for our mirrors with aperiodic coatings, we have decided to go ahead and measure the thermal noise at two other spots on the existing mirrors. Ilaria has designed a scheme for doing that, with input from Riccardo, and she has started on this experiment.
LASTI (Mittelman)
Friday, 4 May was David Ottaway's last day with LIGO. We wish him well as he returns to Australia. Responsibility for the oversight of the LASTI facility has been taken on by Rich Mittelman.
CIT Science Group (Weinstein)
________________________
Patrick Sutton:
I've spent most of the past week on LSC-PP duties and making MDC frames for the GRB070201 analysis.
GRB070201:
- Finished production and testing of the sine-Gaussian and white-noise-burst MDC frames for the GRB070201 analysis, using X-Pipeline simulation codes.
- Wrote summary document of the preliminary X-Pipeline results for GRB070201 analysis, as requested by Marka.
Other:
- Reviewed Mukherjee's paper on glitch classification for GWDAW proceedings.
- Handled review of BNS review paper by Anderson and Creighton.
- Data analysis meeting.
- LSC-PP telecon.
- Bursts telecon.
________________________
Igor Yakushin:
Running coherent waveburst trigger production and sine-gaussian simulations on the first year of S5 in preparation for the LSC and Amaldi7 meetings. The networks currently used are: H1H2, L1H1, L1H2, L1H1H2. We shall probably also use some networks that include GEO, at least L1H1H2G1.
________________________
Gregory Mendell:
Not much to report for the last week, but I will be getting back to work on the S4 PowerFlux/StackSlide/Hough paper soon, as well as completing some work for the pulgroup to be presented at Amaldi this summer.
________________________
Eirini Messaritaki:
- I have been spending most of my time finishing up and debugging the code that performs the null stream test for H1-H2 for the inspiral analyses.
- I have been working with the people involved in the follow-up project.
- I have been working with Vibha on her SURF project proposal.
________________________
Kent Blackburn:
OPEN SCIENCE GRID APPLICATION DEVELOPMENT
- Successfully ran NanoHipe at 7 different OSG sites
- Run NanoHipe on the FNAL_GPFARM site successfully on the FNAL_FERMIGRID site it failed
- Conducted error analysis of Failure on FERMIGRID with help from Steven Timm at Fermilab
- Started full Hipe at Milwaukee's OSG site.
- Inspection of results of NanoHipe run on GPFARM
- Getting familiar with TWiki, editing on TWiki
- Reading Condor online material in preparation for Condor Week 2007
- Attending Condor Week 2007 in Madison Wisconsin.
OPEN SCIENCE GRID INTEGRATION TESTBED
- Documented on the OSG Twiki, an addenda to installing and configuring the ws-gram interface in OSG 0.6.0 that captures configuration information required to increase the robustness of the interface when >200 jobs are submitted in a short interval.
- Configured syslog-ng to send gatekeeper, gridftp and Globus container logs to a logging repository at UChicago as part of a testbed on a central logging facility for OSG.
- Successfully used srmcp to transfer 64 gravitational-wave files to the UCSD Storage Resource Manager.
- Attended DASWG, ITB, LIGO-Pegasus and VTB telecoms.
OPEN SCIENCE GRID MANAGEMENT
- Attended OSG Executive and Finance Board Meetings at Fermilab last week.
- Reviewed changes to University of Chicago Statement of Work to get through their office of sponsored research.
- Reviewed new Statement of Work from NCSA with the OSG which precipitated out of IOWA PI transitioning to a new position at NCSA.
- Discussed plans to begin running h(t) based HIPE analysis on the Open Science Grid with Steve Fairhurst.
- Provided the list of OSG milestones affiliated with LIGO that Kent Blackburn, Warren Anderson and Doug Olson (LBNL) are carrying as the "owners" to the LSC Computer Committee.
Laboratory Computing (Anderson)
LDAS Software Systems (Maros)
After much investigation, it has been theorized that the diskcacheAPI has issues with frame files of two second lengths. The theory is being tested by creating a unit test to simulate the condition.
After generating a mail storm, the logscan utility was modified to write out email state to state file so as to throttle mail messages even when there are many restarts of APIs. The new code has been shown to work properly.
The two TCL commands, getFrameCache and getFrameFiles, have been modified to execute within a C++ thread.
An issue was discovered with the weekend testing where the managerAPI would continuously reboot APIs. The garbageCollect routine is being investigated to better understand the problem.
System testing was done using version 1.8.533 of the software. Several of the RDSVerify tests failed because of gaps detected in the frame sets. Because of the use of an active mount point, /archive, lsync is unable to get to a stable point and generate a cache dump file.
LDAS System Administration (Anderson)
Caltech
(Erik Espinoza)
- Testing various kernel configurations on x86_64 platform.
- Sent RMA package to ASA (10 HD, 1 Mem stick, 7 Fans).
- Spent time diagnosing condor_dagman.
- Configured Quill on second schedd.
- Coordinated Quill/ldas-condor reconfig w/ Fred.
- Contacted maintenance about lights in Synchrotron 215A.
- Cleaned up Mail after the LDAS Mail Storm of April 2007.
- Preliminary bbftp research/investigation.
- Further testing of CentOS 5 on menkar.
MIT
(Fred Donovan)
- Some progress on moving condor master; some work on osg-ligo grid.
Livingston
(Igor Yakushin)
- Tested the modified version of segpagegen; starting from tomorrow the dumps at CIT will be generated by this new modified version.
- Received X4500.
- Moving version 1 DMT online segments to version 0.
- Patched the new dataserver.
- Since the last week upgrade of gateway at LHO, segment replication between LHO and other sites did not behave and die: I restarted it several times, it caught up and then stopped again and I had to restart it again. I do not see any apparent problems in the log files, most likely the segment database was not started cleanly after the upgrade. As a temporary fix I am running a cron job at LHO that restarts segment replication each 3 hours. So far it was working fine since yesterday.
(Dwayne Giardina)
- Tape eject and shipment to CIT.
- Tape storage eject.
- RMA'd 6 Maxtor drives.
- Re-imported 3 tapes needed to restore corrupted files at CIT.
Hanford
(Greg Mendell)
- I have updated the LSC DataGrid Client 4.4 instructions to include a fix for installing this on Mac OS X under Intel, for example for Mac users that want to install pyGlobus with this package. I am also continuing to work on a new driver script for h(t) generation. We will start publishing the new h(t) frames that use v3 calibration soon.
General Computing (Wallace)
MIT
(Fred)
- Rebuilt catfish spam filter (on different hardware), seems fine now.
- Rebuilt gar (gateway host LDAS cluster).
- Installed XP on new Altium desktop.
- Created new zone on pellinore (needle-zone) as LDAP server for gc /ldap net (replaces needle). Xorg intel dual-head configuration issues on two laptops; wireless net in LATSI lab.
- Rearranged data stores on tintagle (backup server).
- Misc. user assistance.
Livingston
(Dwayne)
- Received new outreach laptops.
- LabView install, waiting for a quote on upgrade pricing
- Swapped out tapes in the GC tape library
- Installed arkeia on the new www server, added to the GC save pack
- Spam filter cleanup
- Other usual user requests and support
Hanford
(Christine)
- Continued designing the distribution of user accounts across the two partitions of the new disk system.
- Sent a support request to Symantec for help with the Veritas tape backup software. I'm getting bus errors when trying to start the daemons.
- Identified who is required to have sensitive data on their computer. I'm working with the users to get the data encrypted and stored securely.
- Attended the monthly Cybersecurity meeting and brought up an issue about web site passwords; the fact that there are too many for one person to remember, there was a request to use a single password for similar web sites and how to properly store passwords. I'll be working with the user who brought up the problem to implement some of the suggestions from the meeting.
- Working with a user to purchase a new computer to meet his needs.
- Two people are now using the Calcium web calendar. Set up accounts and calendars for them. Looked at upgrading tot he latest version.
- Other misc. user support.
(Shannon)
- Set up Nagios for host/service monitoring. Set up several plugins and options for nagios.
- More patches on mail server; several are kernel patches and have potential conflicts that need to be resolved.
- Reviewed and edited the LIGO Laboratory Cybersecurity Policy with Kent.
- Followed up on some IDS alerts: currently 4,126,681 alerts in the database, 824 unique alert IDs in 27 categories.
- Updated the configuration on the border 3550
- Ordered 6 laptops for outreach
- Ordered a new server for LLO IDS while on sale at Sun.
- Checked our BGP advertisement. Worldwide BGP routes shows the following now:
> >show ip bgp 208.69.128.1BGP routing table entry for 208.69.128.0/22, version 60394752Paths: (41 available, best #33, table Default-IP-Routing-Table)
CIT
(Bruce Sears)
- iLog Maintenance: (0.5 days). General iLog maintenance (user adds, keyword adds, systems work, etc.)
(Veronica)
- LIGO: Most time was spent setting up the new roster database. Trained Cindy and Dorothy on how to use it. Made various modifications to the database and data updates. Set up a search utility. The old database/app is still accessible for reference but no longer published. Continued capture and editing of the footage shot for Ken Mailand's group and LASTI. Troubleshoot the LAAC online application error. Other misc. web updates.
- LSC: Updates of the database of technical papers. Website updates.
(Christian)
- Ran monthly ghost backups on all NTSRV's
- Ken Mailand- Re-installed Solidworks 2007 SP3 and Office 2003.
- Minor tweaks on the unit in the display case.
- Bill Tyler- Upgraded Adobe acrobat professional from version 5.0 to 8.
- Toner cartridge replacements- 40 Meter and Irene Baldon.
- Other misc.: Continued onsite software/phone support.
(Larry)
- Went through a number of purchase items. The SUN equipment has arrived and made arrangements for the one item incorrectly shipped to be reshipped to LHO.
- Assisted Gina with a couple of different procurement issues. Tracking down some P-card issues.
- Spent and spending time with the different construction workers on the work being done in the different labs and offices. The new air-conditioning installation should start next week.
- Performed the monthly backup on the user accounts. Worked with Mike in moving the home accounts to the new server. Still a few more to go.
- Spent time resolving a mail-storm problem we had. Thanks to Eric we were able to get it cleared up in less than a day. The good thing was that none of the mail machines went down, they just had a problem clearing out the large cache of e-mail.
- Assisted a number of users with their accounts and setup a few new accounts.
- Setup and repaired a couple of mailing lists. Still some work to do on fixing one of the lists.
- Assisted Veronica with a couple of different items.
Advanced LIGO and Supporting R&D (Shoemaker)
Advanced LIGO Systems
Modeling and Simulation
From: Hiroaki Yamamoto hiro@ligo.caltech.edu
e2e weekly meeting
The MC stimulation to study the frequency noise induced by the MC of avdLIGO has been discussed.
The main topics were : (1) which observable signal is to be used to compare with the requirement set by PF and (2) if the simulation setup includes all necessary physics elements properly, including the laser frequency broadening ~4kHz.
AdvLIGO LSC/ASC design using FP arm model with quad suspension (Osamu)
For lock acquisition of AdLIGO arm cavity, I am investigating the fast speed mirror motion (~0.5um/s) with stronger ESD force (450uN). A special method is necessary to damp the mirror speed without using the error signal because ringing happens for too fast mirror motion and error signal is useless anymore. The "gudelock" algorithm predicts the mirror motion and speed, but the prediction of speed is not so accurate for fast motion. Gain adjustment which is used to estimate the mirror speed can compensate the error of mirror speed, but optimal gain depends on the mirror speed itself. I introduced a speed dependent compensation for the predicted speed since e2e can know the mirror speed directly. Then mirror can be locked from very low speed up to 0.5um/s. Experimentally this compensation equation can be estimated from two transmitted light peaks.
Static IFO simulation (Hiro)
Hello-Vinet formulation of the thermal effect on a mirror has been implemented and validated. Sign of Saint-Venant correction for the surface deformation seems to be incorrect in the original Hello-Vinet paper. Phil calculated the surface deformation by suing FEM and the code in the simulation matches with this result.
The simulation code is being developed to simulate a coupled cavity, which will be used for the comparison of the choice of the recycling cavity, stable or unstable.
Modeler - e2e simulation engine, ALFI : e2e front end (Hiro, Bruce, Melody)
Hiro provided support for Matt and Lisa to use the e2e dual recycled fast simulation module to study the adv.LIGO lock acquisition.
Melody and Bruce worked on the front end of UserDefinedPrimitive module support. This is almost done, and, at Bruce's next visit of Caltech, a release candidate will be built.
Mechanical Simulation for advanced LIGO (Sany and SLU team)
Continued the e2e modeling of AdvLIGO Input Mode Cleaner. Measured length sensing control open loop transfer function. Following Osamu's suggestion, the transfer function was measured in the following way. To keep the Mod Cleaner cavity locked, both the frequency and length sensing control loops were engaged. An excitation (disturbance) signal was injected after the splitting point of the length sensing and frequency sensing controls. The resultant open loop transfer function indicates that the length sensing control has too high gain at the high frequency region, and the crossover frequency is lower than 10 Hz. To fix the problem, redesigning of the length sensing control filter is under planning.
CDS Prestabilized Laser
From: Peter King <pking@ligo.caltech.edu>
I'm hoping that we can organise a meeting with the Beckhoff Automation programmer here in Hannover. Then we can go over how to do the communications between EPICS and TwinCAT.
A fan in the air handling system at LZH died, putting work on the laser on hold. This is a cautionary step to protect the laser rods.
Rolf and Alex have successfully updated the digital controls system here. We are about to try and put the diagnostic breadboard under control.
Control and Data Systems
From: Jay Heefner <jay@ligo.caltech.edu>
AEI PSL Work
- Updated the AEI control system with latest software and installed AA/AI hardware. The system was then connected to the laser diagnostic bread board and they were able to lock the cavity length.
- In the process of setting up their second system and adding some scripts to provide more automated startups.
- Had some discussions with Martin Hewittson on their Matlab based dataviewer and analysis tools. He gave me pointers to the code and I will look at them more closely after this trip. At first glance, they look very good and it has some nice GUI features. It may be that we can just change out their client/server call to their DAQ system with our Matlab NDS software to connect to our system, at least to play back archived data. My understanding is they do not support live data feeds, so the amount of work necessary to add that capability needs to be looked at as well.
AdL SUS
- The schematic files for the UK UIM driver have been received and are being cleaned up in preparation for board layout and manufacture. Clean up should be done by early next week.
Enhanced LIGO OMC SUS
- The rack and electronics for the OMC SUS test stand are assembled and ready for test in room 56.
- The operator station has been received and needs to be configured. This may not be complete until Alex and Rolf return from Germany.
- The FE computer has been received.
- During this week's OMC meeting, it was discovered that there was some confusion as to who was ordering the osem wiring harness so the harness is not ready. The 9 pin micro D sub connectors are now being overnighted from Glenair and Bob is in the process of assembling the harness. It should be ready some time next week.
Tip-Tilt equipment for ANU
- The equipment needed for ANU includes:
- 2 ea AA chassis- boards, parts and panels redesigned and on order. Boards being sent out for stuffing.
- 3 ea AI chassis- boards, parts and panels redesigned and on order. Boards being sent out for stuffing.
- 3 ea Sat Amp- boards and parts on order
- 2 ea SUS receiver- boards and parts on order
- 8 ch Coil Driver- boards stuffed, panels on order
- IO chassis components- boards and parts ordered for ADC adapter, DAC adapter, Timing Interface
- The original ship date of 5/26 now appears to be in jeopardy due to manpower shortages and other priorities.
AdL PSL
- Beckhoff PLC equipment and software received. No progress from last week due to other priorities.
AdL ISI
- The AA and AI filter boards for ISI installation at LASTI are stuffed. The AI chassis are assembled and ready for test. AA chassis panels have been ordered.
Seismic Isolation
From: Ken Mason kmason@ligo.mit.edu
BSC Seismic Isolation Assembly and Test
- Galli & Morelli has completed the cleaning of the 9 large parts and will begin the baking on monday. FTIR test kits are being sent to them for testing.
- Bob Taylor has finished four crates of ISI parts and shipped them to MIT. He is now cleaning and baking hardware.
- Bob and Myron have picked out scaffolding to go around the test stand and placed it on order.
- Stephany has completed the design of the cable clamping and placed it on order
HAM seismic Isolation Design
- We have recieved quotes for building the two prototypes for Enhanced LIGO from HPD. Accounts and cost justifications are being written to move forward.
Suspensions
From: Norna Robertson <nroberts@ligo.caltech.edu>
- Two documents completed and circulated to aligo_sus for comment:
1) ETM/ITM Quad Suspension Noise Prototype Test Plan
2) Quad Noise Prototype Outline Test Plan, OJEU Timing and Associated Risk
- Work on OMC continuing. Posted updated MATLAB files with latest parameter set on the OMC wiki. Confirmed choice of blades for lower stage of OMC suspension (spares from input modecleaner build). Outlined revised schedule with Janeen.
- New mechanical engineer Bob Kirsner has joined LIGO at Caltech. He will be doing SUS Advanced LIGO design work, starting with recycling mirror suspension. Introduced him to suspension design work with copies of relevant documents.
- Revised Adv. LIGO SUS NSF review slides following last week's internal review.
- Assembling demographic (the number of students, postdocs, scientists, engineers, etc.) data on LSC membership.
From: k mailand kmailand@ligo.caltech.edu
- The LASTI installation tooling manual lift table with the 5 axis fixture will ship tomorrow.
- A video document has been made describing the operation of each assembly, this needs to be edited, and should ready to be sent to the DCC by 5-10.
- There are 4 wood crates total I sent the dimensions and approx. shipping dates to Ken Mason
- I'm working on a layout of the faraday assembly suspended in an LOS for Mike Smith.
- SolidWorks 2007 crashed today, and had to be reloaded by Christian Cepada to fix an unknown problem.
Core Optic
From: Helena Armandula ahelena@ligo.caltech.edu
- Received the reaction mass from the UK. It is at Caltech, but, still in shipping. Next week, after adjustments to the ESD mask will be shipped for gold coating.
Advanced LIGO Coatings
LASTI - LMA report
- the AR coating was done on side B of the LASTI substrate on monday 30. It seems to be OK.
- yesterday, we have measured the number of defects of side A after cleaning before doing the HR. We found some quite large defects on the central zone, I will send you the images.
- Today, we have started this afternoon the HR coating. We will supervise the coating run also during the night to be sure that everything is OK (we can be able to stop the coating run and restart it afterwards without damaging the substrate). It will end tomorrow evening.
- On Saturday, we will come to the lab to put the LASTI mirror in the oven for 3 days.
- Next wednesday, we will start the optical characterization and the mirror should be ready to ship on Friday 11, May.
Auxiliary Optics
From: Michael Smith smith@ligo.caltech.edu
SLC
Arm Cavity Baffle
I modeled the BRDF and reflectivity of black glass analytically, and used that information to determine more accurately the scattering requirements for the arm cavity baffle. A reflectivity <0.001 is required, and a BRDF <0.01. These are both met with black glass. Furthermore, I analyzed the scattering and reflectivity properties of a truncated "conical" (an octagonal representation of a cone) beam baffle/trap for the arm cavity baffle. Such a design has BRDF <0.01 and R < 1E-5.
Elliptical Cavity Baffle
There is also a potential scattering problem associated with the elliptical baffle. Approximately 3 W is incident on the periphery of the elliptical baffle from the ITM direction. This light will scatter from the baffle directly back toward the ETM and subsequently re-scatter and enter the IFO mode. Also, some of this light will reflect from the baffle, hit the vacuum wall, scatter back toward the baffle, reflect from the baffle, and follow a return path which will get it down to the ETM where it can scatter into the mode. This scattering imposes a similar requirement on the elliptical baffle reflectivity and BRDF as does the Arm Cavity Baffle.
I made a conceptual model of a truncated "conical" elliptical baffle/trap using SW.
INTERNAL REVIEW
In the process of cleaning up some last minute AOS cost details.
Input Optics
From: David tanner@phys.ufl.edu
Guido Mueller:
- Calculating the general equations for shot noise in various sensing schemes to verify the shot noise for the ASC code and to train students.
Luke Williams:
- inspecting FR optics and magnets received from IAP
- designed boxes to hold magnet discs
- determined that the beam reflected from PRM during commissioning can be parked on the baffle above MMT3.
Wan Wu:
- Two lasers are phase locked and I am still in the process of optimizing the mode matching between two lasers.
Rodica Martin:
- Following up on quote requests from vendors for blanks, polishing and coatings for the suspended input optics.
Antonio Lucianetti:
- In situ restored the isolation ratio of the in vacuum Faraday isolator at 30 W and 10^-4Torr, using a motorized rotatory stage to control the half waveplate. The restoration was about 5 dB.
David Tanner:
- Completed a draft of a document discussing advanced LIGO cavity lengths (IMC, PRC, SRC, and arms) and corresponing RF modulation frequecies.
For additional information about this report, contact Albert Lazzarini or Phil Lindquist