Weekly Report for Week Ending November 15, 2007

LSC	Administration	Hanford Observatory	Livingston Observatory
Optical & Mechanical	Controls and Data Systems	40 Meter Facility	TNI
LASTI	CIT Science Group	Laboratory Computing	Adv. LIGO Development

Past Weekly Reports

LSC Issues (Reitze)

• Stefan Ballmer has been elected co-chair of the Stochastic group.  Elections for co-chairs of the Inspiral, CW, and Burst groups are currently underway.
• A web site for the December LV meeting in Boston is now online at http://www.ligo.org/conferences/lv1207/

LIGO Laboratory Administration (Lindquist)

STATUS OF LSC MOUs (Lloyd)

MOU status remains as reported last reporting period (see below).

• The table below shows all of the MOUs and their attachments that have been approved and signed off to date by both the LSC Spokesperson and the LIGO Laboratory Director.

  MOU	Attachment
  Andrews University	DAT, OPS, Z
  Embry-Riddle University	DAT, OPT, SUS, Z
  Eotvos University	DAT, OPS, OUT, Z
  Florida, University of	ACF, DAT, LAS, OPS, OPT, OUT, SUS, Z
  Goddard	DAT, OPS, Z
  Hobart and William Smith Colleges	DAT, OPS, Z
  Institute of Applied Physics	OPT, OUT, Z
  IUCAA	DAT, Z
  Louisiana Tech University	DAT, OPS, OUT, Z
  Loyola University	DAT, OPS, Z
  Maryland, University of	ACF, DAT, OPS, Z
  Montana State University	DAT, Z
  Oregon, University of	DAT, OPS, OUT, Z
  Rochester, University of	DAT, Z
  Southeastern Louisiana University	ACF, DAT, OPS, Z
  Stanford University	ACF, DAT, LAS, OPS, OPT, OUT, SUS, Z
  Texas-Austin, University of	DAT, OPS, Z
  Texas-Brownsville, University of	DAT, OPS, OUT, Z

• ACIGA and Carleton College are still under review.
• Northwestern, Sannio and Washington State are pending, requiring changes requested by the review panel.

PROPERTY ACCOUNTING (Luna)

• Working with Ed Jasnow issuing Power of Attorney letters to local customs brokers at LHO, LLO and MIT.
• Continued working in gathering data from LHO & LLO for the Federal Real Property Profile required by the NSF.
• Working in disposing a one ton adjustable gantry crane.
• Continued working with Property Services on year end reports for Government-Owned vehicles and leased GSA vehicles.

DOCUMENT CONTROL CENTER (Turner, Mak)

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

• Processed large batch of MOUs.

FINANCIAL SYSTEMS (Funaro, Brambila, Oracion)

>From: "Funaro, Catherine" <Catherine.Funaro@caltech.edu>

• For ACCOUNTS PAYABLE HISTORY Press Here.

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

• Completed the close out of the Butler subcontract.
• Completed the close out of the Goodrich subcontract.
• Completed change order #5 to LSU and submitted to vendor.
• Set up the new account and issued the order for the new glass work to be done.  Coordinated the payment.

>From: Karl Oracion <koracion@ligo.caltech.edu>>

• Completed and posted monthly operations report as of the end of October 2007 on the network.
• Received new budget template from project accounting. Currently working with Project Accounting, IMSS and OSR to ensure alternate method of budget upload into Oracle works as planned. We plan to use the new method to upload the first half of FY2008 Operations Budget.
• Completed P-Card training
• Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport. (For passwords contact Karl)

SUBCONTRACTS MANAGEMENT (Jasnow, Salone)

>From: Gina Salone <gsalone@ligo.caltech.edu>

• We continue to work with Accounts Payable to implement the new imaging system, and to reduce the backlog of LIGO invoices.  They have provided an additional person to assist in this reduction.

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

• We have received a revised proposal from the third proposer for the polishing of the Pathfinder optics, and the production of the optics for Advanced LIGO. The review committee will consider its next step.
• The NSF has agreed to allow Caltech to accept funds from the United Kingdom under Advanced LIGO to purchase penultimate test masses.  These items will remain Caltech property even after being installed at the sites.  The only requirement is that they appear as Caltech property on any inventory sent to the Government.
• Ed Jasnow and Karl Oracion met again with representatives of Caltech Project Accounting to continue to explore for more effective ways of reporting expenditures and encumbrances to the cost account managers.  The new reporting methods will be implemented within the next few weeks.

PROPOSALS and REPORTS (Lindquist)

We have submitted the status report for the end of October to the NSF.

First Iteration Budgets have been prepared for FY 2008 for all WBS elements with the exception of Advanced LIGO, which have not been finalized.  These budgets have been used in the preparation of the FY 2008 Financial reports.  These items will be discussed on Monday.

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

Summary of post-S5 Activities at LIGO Hanford Observatory (compiled by M. Landry)

Post-run measurements closed out at the end of last week.   This week, CDS has been working on the addition of frontend machines associated with the enhanced LIGO OMC, and its impact on frames and framebuilders (working largely with fb1).  The LVEA is being transitioned daily to laser-safe status, allowing contractors into the hall for the construction of chiller closets (eLIGO TCS upgrade), and others to drill out holes for HAM6 ISI piers and the assembly/test stand.  Cranes and clean rooms have been moved around, likely impact locking, alongside high winds, microseism, and framebuilder mods, to name a few.  H2 has been thus unlocked for some large stretches this week, H1 for some smaller ones.

 

Summaries:  Tuesday maintenance summary, sort of

 

Highlights from the LHO elog:

• GDS upgrades were completed last week
• Readying for the HAM6 ISI installation, tiles were pulled and holes drilled for piers to support crosstubes and in turn the active isolation structure
• a continuing effort during the postrun measurement phase has been test mass imaging; phots of the 4k BS are posted here
• CDS work to prepare for the OMC included modifications to fb1 and two new frontend cpus.  A status report was posted
  

Outreach (D. Ingram)

 

The LIGO Electronic Laboratory (E-lab) has now become part of the I2U2 family of E-labs.  You can find it here; log in as a guest to look around.  Eric Myers' Bluestone software, the heart of the E-lab, provides a Web-based data viewer-type interface that makes a selection of PEM and DMT channels available to students and teachers (and LSC members, should the tool be of interest).  Contact Myers (myers@spy-hill.net) or Dale Ingram at LHO (ingram_d@ligo-wa.caltech.edu) for more information.

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

VE modification (Rusyl Wooley):

• This week we pumped the vertex section and helium leaked checked all the work that was done last week.  We found no leaks.
• We then vented the vertex and opened HAM4.
• I also vented the left and right beam manifolds and lined up the large gate valves so that the optical levers can be used on ITMX & ITMY.  Optical levers are required for the earthquake stops work.
• We had to go back into HAM6 and rotate the view port 180, so that nozzle will have to be leak checked again prior to installation of any parts.
• We got the FTIR swipe sample report back from JPL.  Everything was remarkably clean.
• Removed the septum plate for Hanford and wrapped it for shipping.
• There is now a load of support tubes for the SEI test stand in the large oven.

LLO Outreach (John Thacker):

• Two Docent Training sessions: Saturday and Wednesday.
• School Field Trip scheduling and pre-visit  arrangements
• Docent Training Wednesday from 2:00 - 4:30.
• Prepared and delivered three school group programs: Middle School Montessori group; HS calculus class from Mississippi; HS Honors Physics class from Tangipahoa Parish.

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)

• Construction has now begun on the new IST building. There is no access to the lab from the north. Jackhammers are banging away right outside the control room.
• Tobin and John have been working on improving the PSL Intensity Stabilization Servo (ISS). They probed the servo board and found lots of oscillations. The biggest was at 4 MHz, beats between the 33 MHz and 29 MHz RF sidebands on the light. John built a notch filter and installed it on the board. Rob measured the transfer function and RIN. They are now going through a list of further improvements as suggested by Stefan, including finding and eliminating other oscillations, replacing op amps, checking compensation capacitors, gain roll-off HPFs, making sure all differential signals really are differential, etc.
• John is also working on measuring the PSL PMC pole frequency.
• Rob and Rana spent some time diagnosing the degredation in the PSL frequency stabilization servo (FSS) UGF. There's much less light getting to the reference cavity than there should be / used to be. They aligned various things and got the transmission up 15%, but probably also need better mode matching, AOM throughput adjustment, etc. Work is ongoing, and is necessary to get the noise down sufficiently to lock the full interferometer.
• Alberto is getting involved in 40m activities. He'll be working with Caltech undergrad Max on implementing the new noise budget software at the 40m (and updating the code in CVS so that it runs at all sites).
• Alberto is also beginning the design of an RFAM monitor at the mode cleaner transmitted port, using a broadband RFPD to simultaneously monitor all relevant frequencies (33, 166, 133, 199 and 29 MHz).
• Andrey is working on modeling the transfer function from floor, through stacks and pendulums, to the test masses.
• Steve is designing a "wood's horn" copper beam dump for use with the eLIGO 35 W laser.
• Pinkesh and Norna have been working on the OMC suspension. With help from Chub, they reduced the stiffness of the wiring sufficiently to see a pretty decent vertical transfer function. Finally, they removed ALL the wiring and saw a vertical transfer function that is close to design. They are revising the layout of the wiring to minimize mechanical stiffness on the suspended OMC.
• Rana installed the new matlab-based ligoDV (previously GEO DV) to look at 40m data.

---

Thermal Noise Interferometer (Black)

This just in from Akira:

• I worked on the mode cleaner OSEM controllers to improve the damping and it has gotten better.
• I adjusted the gains in the T-matrix and inverse T-matrix to reduce cross coupling between the z, phi and theta channels.
• I also adjusted the gain of each of the z, phi and theta channels. I had thought the mirror motion would decrease if I turned up the gains but for the phi and theta channels the motion decreased as I turned down the gain.
• I built a cavity to measure the response of the pzt in the NPRO and the Pockels cell. The cavity was built large so I could scan through a free spectral range but the operating manual of the NPRO suggests that the pzt response is becomes non-linear for high voltages an frequencies so I don't think a measurement with a large cavity would be relevant to normal TNI conditions. I am building a smaller cavity now.
• I also took measurements of the responses of the electronic components of the mode cleaner servo.

---

LASTI (Mittleman)

BSC-ISI

• We have finished removing all of the actuators and relevant sensors. The misbehaving GS13 has been shipped of to Livingston to be reprimanded and repaired. We have begun the reassembly process and hope to be done early in the week after Thanksgiving.

Noise Prototype Quad

• Brett, Joe, Bob and Sharon have been working to modify the intermediate mass blade clamps. The masses have been removed from the structure and the clamps are being filed to give a slightly increased launch angle.

CIT Science Group (Weinstein)

___________________

Pinkesh Patel:

• Data side:
  • Working on paper/poster/abstract for GWDAW
  • Coding in a technique to compensate for loss due to interpolation
  • Working on inserting the resampling code into the computefstat_v2 code.

___________________

Kipp Cannon:

• Continued tuning galactic core burst search.

___________________

Kent Blackburn for the Grid Computing Research and Development Group:

GRID APPLICATION DEVELOPMENT:

• Wrote agenda and minutes for LIGO-Pegasus telecon.
• Attended LIGO-Pegasus, DASWG, CBC Inspiral, CBC Code Development and OSG-USERS telecons.
• Einstein at Home activity:
  • Troubleshooting: error transfering executables: solved
  • Attempted to run EaH application on OSG, fail: Post Script fail status 1
• OSG-PROD  activities:
• Opened GOC ticket for Purdue_Lear, Purdue_Caesar, Purdue_Physics
• Troubleshooting FIU_PG, GOC ticket still open, UFlorida_HPC. Karan working on secondary staging control for Pegasus
• Testing WS-GRAM submission at AGLT2 (fail), FERMIGRID (fail), OSG_LIGO_MIT (in progress)
• Joint LDG/OSG activities:
  • Attempted to submit workflows to LDG using Pegasus: CIT ok but experiencing difficulties at other sites. This is believed to be because Pegasus server components are not part of the LDG standard software stack (they are be default on the OSG)
  • Troubleshooting this issue at LLO, LHO, NEMO

OPEN SCIENCE GRID MANAGEMENT:

• Reviewed one of the remaining outstanding Statements of Work as the OSG Resources Manager. Found several open issues with the SoW and fowarded these to the institutional PI for clarification.
• Finished Report on the November 2nd Open Science Grid Finance Board Meeting held at Fermilab. The report was distributed to the Open Science Grid Council (OSG governance body), the OSG Executive Team and the OSG Finance Board. It was also posted in the OSG Document Database with the appropriate access controls to reach the groups identified above.
• On November 13th, the report was summarized to the OSG Council in their monthly telecon. The report will also be used as pre-review materials for the upcoming OSG external joint oversight review in Washington, DC.
• Drafting a Memorandum of Understanding (MoU) between LIGO and the Information Sciences Institute of University of Southern California's Pegasus development group to facilitate the development of grid middleware to be used by LIGO for running workflows on Grids such as the LIGO Data Grid, the Open Science Grid and possibly others that are compatible the interfaces and the underlying architecture.

___________________

Gregory Mendell:

• I generated a special ripple RDS data set several weeks ago, with the channels set up by Robert Schofield to record data from power supplies to look for lines. To find this data, use type=RIPPLEPOWER_RDS_JAN7 with LSCdataFind, and the times in Robert's elog: http://ilog.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_ to_vie w=01/28/2007&anchor_to_scroll_to=2007:01:28:19:36:44-robert. The C03 SFTs for the first year of S5, generated at CIT, are now also at LHO. The latests fscans, using this SFT data, and SFTs made from one instance of the ripple board data are here (usual lsc access required): http://ldas-jobs.ligo-wa.caltech.edu/~pulsar/fscan/S5/ hoftSFT spectra/H1_Sept 2006_C03/fscanH1hoftSept2006C03.html http://ldas-jobs.ligo-wa.caltech.edu/~pulsar/fscan/S5/PowerSupplyRippleJan07 /H1.18Jan07.GDS-TEST_34_1_18.outersupplym5V/fscanGDS-TEST_34_1_18_outersuppl ym5V.html

___________________

Drew Keppel:

• Monitoring injection runs for the S5 1yr low mass CBC analysis.
• Continued writing the S5 low mass CBC paper.
• Preparing for December LSC meeting and GWDAW.

___________________

Diego Fazi:

• Testing the speed of the PTF filtering code.
• Implementing the new fast pseudo-SNR statistics for preliminary  thresholding and testing its correctness, efficiency and speed.
• Implementing the new fast algorithm for computing real SNR statistics and comparing results with the old statistics.

___________________

Alan Weinstein:

• Reviewing GWDAW abstracts.
• Reviewing final changes to the S3 SBBH paper.
• Helping Vibha prepare for her SURF talk Speakers Comptetition.
• Talk to Berkeley minority undergrads about LIGO.

Laboratory Computing (Anderson)

LDAS Software Systems (Maros)

• The staging request for frame files is being moved from the diskcacheAPI to the frameAPI (PR#3201). This allows for intelligent decisions on which files to stage since the file system type is known. Previously, the diskcacheAPI requested all frame files to be staged. This also eliminates another spawned task from the TCL interpreter.
• Work also continues with getting frameCPP ready for CentOS 5. Efforts are underway with DMT to eliminate any compilation issues.
• The db2utils now skip databases that are not specified in LDASnames.ini (PR#3224).
• System testing of LDAS was done using version 1.9.109 of the software. No errors were observed. The createRDSTest.tcl and datacondMDC.tcl tests have been integrated into the system test harness. With the datacondMDC.tcl tests, only the jobs are submitted if run as user ldas. The verification of the e-mails is done as a separate step. Currently RDSVerify.tcl is being modified for the system test harness.
• The ldas-test system is running version 1.9.112 of LDAS. A single reboot of the diskcacheAPI was observed. The reboot was due to the manager detecting that the diskcacheAPI was unresponsive and requested it to be rebooted.

LDAS System Administration (Anderson)

Caltech

(Dan Kozak)

• Last week's cluster frame check detected no new bad frames in the cluster, just the previously reported 5 bad Burst-MDC frames.
• Restarted FrameCacheDump on ldas-cit to fix problem with h(t) L2s copied back to cluster not showing up in LSCdataFind queries.
• Confirmed that all h(t) files in /archive/frames are published (i.e. exist in LSCmetadata MySQL table & have RLS entries for file://, gsiftp:// and file://.../data/node).  This concludes the regenerated h(t) effort.
• Worked on metadata testing with new 6140.
• Shelf storage ejects at LHO.
• Confirmed that A5 L0 data at LLO is being correctly archived into the astrowatch archive set (single copy on tape).
• Attended meeting with Sun.

(Phil Ehrens)

• The usual certificate related tasks and user support.
• Ongoing support of MOU review process and data management.
• Node321, which had been swapped with the spontaneously powering off node262, powered off spontaneously. I swapped the power supply with node500. Both machines successfully rebooted.
• Installed CentOS-5 on ldasbox3, ldasbox4, and ldasbox5.  Installed Solaris 10 upgrade 4 on ldas-suntest3, ldas-suntest4 and ldas-suntest5. CentOS installations went without incident, but all Solaris installs had some problems with apache and ssl.
• Investigated booting DOS from a file via GRUB for doing BIOS updates of cluster nodes. Identified toolset, but need to develop and test actual method of operation.

MIT

(Fred Donovan)

• pcraid12 3ware problems; dataserver meta mirror down (seems that prev. failed submirror reattached after a reboot) -- fixed;  ldas-kickstart: dhcp/tftp/pxe set up (internal net (10.x) only for centos5 installs.

Hanford

(Greg Mendell)

• One of the air conditioning compressors failed in the LDAS cluster room at LHO. I have been told that the replacement shipped from the factory to our local contractor on Nov. 13. Until the unit is replaced, the cluster is running at reduced capacity. Otherwise, the sys. admin. work for the past week has been routine.

(Ben Johnson)

• fb1 is now running Solaris 10 with PCI expansion chassis. QFS installed ok. So far fb1 is writing what look like good frames.
• Rolf and Lisa are at LHO. Discussed SENDS et al. with Dave and Rolf and Lisa.
• Continuing to educate Greg w.r.t. fixing node problems; e.g., identifying and replacing bad power supplies, kickstarting nodes, clusterstage.pl., etc. Though only the first item had been taught so far.

General Computing (Wallace)

(Fred)

• A few pc issues: high-bay power supply; jellyfish; gwdaw12 web.
• Purchase paperwork(tax-exempt issues).
• Bit more moving from nw22 areas.
• ilog cli done.
• Working on web interface.
• gwdaw/lsc conference planning.
• Quite a bit msic. xp desktop issues.

Livingston

(Shannon)

• Began initial setup of a RADIUS server to do auth for the captive portal on the new wireless equipment.  Not working with LDAP yet, still working through the configuration bits and documentation.
• Set up a new syslog server on the new subnet.  Using splunk on top presently, may continue with it long term.  Currently generating just under a million syslog entries a day, with only a portion of the hosts reporting to the new server.  If we double our current volume of logs we will exceed the indexing limit on the free version of splunk.  A couple of items can be turned off to reduce the volume if necessary.
• With Jeremy Birch from LSU, moved the weather stations to the new block of IP addresses.  Also gave them more reasonable names so they are easier to keep track of.
• Unpacked and began setup of the MC1000 wireless controller from Foundry.  In order to get all of the desired features, apparently the RADIUS server mentioned above will have to be set up first.

Hanford

(Christine)

• Installed audio drivers and Citrix/Discoverer on a laptop for Advanced LIGO.
• Added 2 more IP addresses to the Advanced LIGO VPN server.
• Set up a computer for a new hire.
• Continued installing spam and anti-virus software on the new mail server.  There were compile problems which took several days of searching the web to find the fixes.
• Repaired a corrupted boot sector on a PC.
• Cleaned out /tmp on the old mail server because a user has such a large inbox on the server that trying to open the inbox had caused /tmp, being used as swap space, to be 100% full so no one else could open their inboxes on the server.
• Updated the DNS servers on the modem router.
• Renewed the maintenance on the Veritas backup software.
• Moved a few more users to the new mail server.
• Helped a user with a quarantined inbox.
• Helped a user setup their personal computer for use as a LIGO work computer.

Caltech

(Mike)

• Reloaded a SUN box due to OS/Hardware issue. The kernel end up getting corrupted. There is still a problem with this box; I put in a call to Sun. This looks like a fan issue that is causing the power supply to fail.
• Worked on a script for the AP4000 wireless Access Points. More work needed on this project.
• Went back to work on a webserver that was put on hold. This is an on-going project. Larry gave me a hand with this due to some SSL issues with this box.
• Trouble shot a network issue with Larry. This turned out to be a network switch that needed to be rebooted.
• Spent time with Christian trying to get the new Ansys software to work on my windows workstation. There are some issues with this upgrade that will need to be addressed before we upgrade all our Ansys users at CIT.
• Called in a Sun server "Shannon Roddy's box" that had a dead power supply. Sun has come out to take care of this.
• Other misc. sysadmin tasks.

(Veronica)

• LIGO:  PAC meeting website updates.  LIGO web updates /user support.
• LSC:  Work on a website for the next L-V meeting.  The website and supporting apps are in production. Updates of the LSC-related databases, other LSC web updates.
• CaJAGWR:  Web updates /user support.

(Christian)

• Workstation backups - Gina Salone, Ed Jasnow and Cindy Akutagawa laptop and workstation.
• Configured new laptop for Joseph Betzwieser.
• Re-imaged two laptops that were returned to the loaner pull this week.
• Working on getting a laptop setup with a special configuration for remote use.
• Did an inventory on printing supplies.
• Working on upgrading to ANSYS11. Mike and I are working on some issues that need to be addressed before we start upgrading users.
• Other misc.: Continued on-site software/phone support.

(Larry)

• Worked a number of procurement issues. Still getting numbers together for the different workstations that need to be ordered. Resolved paperwork items for a number of different P-card items. Working on pricing for the wireless system replacement.
• Worked with different people on wrapping up the cleanup of equipment from the NSF review. Updating the list from lessons learned from that review.
• Finally, got to check out the h/w problem on one of the servers. Mike called it in to SUN and the power supply was replaced. The unit is now back in service.
• Working with Mike on debugging a couple of units being setup for different services. One of the units should be wrapped up by tomorrow so we can get on to the next one.
• Working with Veronica on a couple of different web projects/issues. Also, met with Veronica and Melody concerning the LAAC web setup. That project is progressing and we should be able to have others poking at it sometime next week.
• Updated some documentation on builds that we have been working on.
• Working with Mike and Christian on logistical issues concerning new builds and notebook distribution.
• More modifications done to the mail aliases. Working on a couple of requests for new aliases on the mailman list.
• Working out logistics with the group for Mike, Christian and Veronica to help out with some work to be done at LHO.
• General user assistance.

(Melody)

• Continuing work on the LAAC web. Imported the student information from the Excel database into the MySQL db. We had a meeting to iron out the mequirements. I'm currently implementing the interface that was agreed upon.

Advanced LIGO and Supporting R&D (Shoemaker)

Advanced LIGO Management

• No report.

Advanced LIGO Systems

Modeling and Simulation

From: Hiroaki Yamamoto hiro@ligo.caltech.edu

e2e weekly meeting

• Sany Yoshida talked about his MC performance study. He plans to start including the angle degree of freedom, and there was a discussion with Mark Barton about the effect of the wedge angle.

Static IFO simulation (Hiro, John)

• John worked on finding the optimal ring heater correction for a FP (cold state ITM ROC= 1971 and ETM ROC = 2191) with thermal distortion of the surface (no thermal lens in the substrate yet). With the corrected curvature of ITM ROC = 1931m and ETM ROC = 2164m, the TEM00 mode (mode being defined by the cold state cavity) was  recovered to be 99.9%. The beam size on ITM is 5.54cm and that on ETM is 6.22cm, which is very close to the cold state beam size on ITM 5.56cm and that on ETM 6.21cm. The diffractive does increase from 0.4ppm to 3.6ppm, and the loss due to mode coupling is around the same size (several ppm per bounce). These are the results using the material absorption 200ppm/cm. With the low CO content mirrors for ITM, this will be 0.4ppm, and the thermal effect will be ~10% smaller. John is working on the mapping code development to be used to convert the phase map data to arbitrary mesh sizes to be used in SIS.
• Hiro finished the study of the signal loss for the stable cavity configuration when the ROC of ITM was off to larger side. The loss comes out to be several % when the ITM ROC is larger by 1%. The best mode matching was pursued by adjusting the distance between MMT2 and MMT3.
• Hiro will switch the focus to the study of the RF sideband in the recycled Michelson : requirement of the effective ITM curvature to keep the desired mode for stable and marginally stable configuration. This will provide the requirement on the compensation plate.

Mechanical Simulation for advanced LIGO (Sany and SLU team)

• Ran our AdvLIGO MC e2e model with DAQ ground motion (recorded at LLO) as input to the HAM seismic isolation model, and compared the computation with our previous run in which we used the e2e's standard ground motion. (This standard ground motion was created for Initial LIGO e2e models based on zero/pole fitting to LHO's ground spectrum). The resultant MC frequency noise spectrum looks similar to the previous result with the e2e standard ground motion. The comparison was made in 1<f<10 Hz. There is a slight tendency that the spectrum based on the LLO's DAQ shows higher value towards 1 Hz and lower towards 10 Hz. Analysis will be continued.

Prestabilized Laser

From: Peter King <pking@ligo.caltech.edu>

• Nothing significant to report.  Still waiting for clearnace of material from Rana's lab to be tossed so that I can start moving equipment over from Lauritsen.

AdL PSL

• I started fabrication of a high voltage amplifier intended for driving some PZT mirror mounts to control beam pointing onto a photodetector.
• A draft of the standard operating procedure (SOP) for operation of the Enhanced LIGO Laser at the observatories is being worked on.  The SOP follows the new guidelines adopted by the safety committee.

Control and Data Systems

From: Rolf Bork rolf@ligo.caltech.edu

AdvLigo

• Met with Barker and Bogue at LHO to discuss the AdvLigo supervisory controls, in particular assignments for the upcoming PDR.
• Gave a presentation of the GEO Dataviewer (Matlab GUI based), as modified to run with Ligo, at the Wednesday CDS meeting. Beginning discussions on possible support of this tool for AdvLigo.
• Discussions with Josh at LHO on possibility of integrating the new fiber optic timing slave units into the PCI-X based commercial ADC/DAC I/O chassis. Along these lines, we will investigate removing the present switching power supplies from these I/O chassis and replace them with the power regulators developed for the timing system.

eLIGO

• Installed the OMC realtime control computers and I/O chassis at LHO (all in MSR for now). System testing has begun, with the primary focus at this point to verify interoperability with existing Ligo control and DAQ computers and networking.

Seismic Isolation

From: Ken Mason kmason@ligo.mit.edu

BSC Seismic Isolation Assembly and Test

• Both stages have been leveled and the actuators re-zeroed. The actuators have been removed and re-gapped on the bench. We will be replacing the actuators over the next several days.
• The stages are in the locked position to allow the SUS group to do modifications on the quad noise prototype.

Single Stage HAM Assembly and Test

• Brian O., Pradeep, and Mike L. have been at HPD this week. They have completed all tests planned for and have seen excellent performance. We begin disassembly on 11/28.
• The precision cleaning is behind schedule due to ovens being down at Caltech and LLO. The assembly stand and GS13's have not been delivered yet.
• The second set of actuators have been shipped by PSI to MIT for inspection and testing. They are scheduled to arrive on Friday.
• We were planning on using the installation elevator from SAS to install the Single Stage HAM into the chamber, but it turns out to not have the capacity to lift the heavier ISI. We are looking into a plan which utilizes two gantries and a 16' beam for the installation.

Suspensions

From: Norna Robertson <nroberts@ligo.caltech.edu>

• OMC SUS work: Working on OMC double suspension with Pinkesh, Chub and Dennis. We showed that the peek covered electronic cables (two bundles each of 18 wires) which went from the optical bench via the middle mass to the structure were significantly affecting the behaviour of the suspension, both with respect to DC alignment shifts when cable bundles were moved and to cross-coupling of modes seen in taking a vertical transfer function. We decided to change to cables going directly from bench to structure with the peek covering removed. Could immediately see difference in behaviour - suspension much freer. Vertical transfer function now much cleaner, cross-coupling reduced. Also DC alignment shifts reduced. So our baseline design for the cabling is now to take the bundles up to the structure with only short peek section where attached to the structure. Chub is working on revised layout.
• Next step is to weigh the bench so that we can decide on reworks to get bench and middle mass at correct height and balanced.
• Supplied RAL with revised set of BS suspension parameters, noting that BS baseline design is now 370 mm diameter, horizontal symmetric wedge of 0.9 degrees and thick end of wedge 60 mm thick.
• Further work on setting up LIGO staff trips to support LASTI SUS.
• Monthly Adv LIGO schedule telecon with Carol and Dwight.

From: Janeen Romie <janeen@ligo-la.caltech.edu>

Output Mode Cleaner

• Making some changes to the installation procedure, after talking to Gary & Sam on Monday and Norna on Tuesday. Mike Meyer has updated the parts list, and we will go over that this morning. He's also designed a creep baking fixture for the top blades, which we'll look at at the meeting this morning. A local machine shop is making the connector brackets and alternate earthquake stop brackets. All are due back the first week of December. Ken Mailand and I have not had luck finding a vendor willing to quote for electropolishing the structure. I have one more request out, but we are pursuing chem etching and brite dip as an alternative.

Earthquake Stop Retrofit

• I have all of the parts ready to assemble but the tips and the BeCu screws, which fell victim to a bag RGA in Bob Taylor's lab. He reports that they might make it here Friday. We will assemble the stops as soon as all of the parts are here.

Recycling Mirror Suspension

• Nothing significant to report.

Participated in the meeting with Carol & Dwight yesterday.

From: k mailand kmailand@ligo.caltech.edu

Adv. LIGO

• I'm designing an assembly frame and shipping container for the mode cleaner optical bench, for carry on transportation to site.
• I have made contact with a local aluminum etch cleaning process for Calum /Janeen samples are in process, waiting for quote on structure.
• I have contacted a local water jet cutter for the baffle and beam dump black glass cutting. They will do a sample part this week.
• Testing the faraday 4 wire style damper is in Phil Willems lab, is in progress.

Core Optics

From: Bill Kells kells@ligo.caltech.edu

• Considerations with regard to the setup of our new labs for optic metrology at Caltech for Advanced LIGO are at the decisive stage. (e.g the OTF, longstanding in the subB of Bridge now goes into new quarters in a different building).
• Have begun to re-edit/write the existant COC DRD for presentation at an imminent design review. We are first intending a decisive round of tete-a tete to decide Adv LIGO system configuration parameters to crystallize COC requirements.
• At long last have completed analysis of a model for light scattered from TM beam spots (on HR surfaced), that is, descriptive of the now familiar "globular cluster" images. This confirms the essential "speckle"-like character of the scatter, and confirms key aspects of the published theory of the mean scatter intensity in terms of surface roughness PSD. I will shortly complete a T note on the basics, with more detailed, quantitative comparison to recent (POST S5) images and scatter measurements.
• In connection with 3. above, work with C. Vorvick in ongoing to reduce digital camera images to numerical data.

From: GariLynn Billingsley Billingsley_G@ligo.caltech.edu

PATHFINDER

CSIRO

• We have final surface data and the final report. The final report is C070179-01
  We have data in .opd format for all apertures.
• Located at ~gari\cocdocs\LIGO2\Pathfinder\CSIRO contract\DATA

QED

• Has demonstrated  requirements for pathfinder.  Their report is C070216-00.
• Working on the PDR.From: Helena Armandula ahelena@ligo.caltech.edu.

Auxiliary Optics

From: Michael Smith smith@ligo.caltech.edu

IFO LAYOUT

• Mike has completed a preliminary ZEMAX layout of the folded stable power/signal recycling cavity IFO. He is waiting for definitive numbers for the power and signal recycling cavity lengths to complete the layout. 

Input Optics

From: David tanner@phys.ufl.edu

Guido Mueller:

• Analyzing losses in the stable recycling cavity and writing a paper about the stable recyclng cavity design.

Muzammil Arain:

• We have analyzed the data generated by the LLO team for determining the thermal lensing in TGG and DKDP. It has been estimated that a 3 mm DKDP will optimally compensate the thermal lensing in TGG. A procedure for optics lab set-up of FR has been orepared.
• On the stable cavity analysis for Advanced LIGO, we have continued our efforts to determine mode matching losses with given ROC errors in optics. Our numbers are now within a factor with the FFT analysis.

Rodica Martin:

• Tested transmission of the REO  witness sample for s and p polarization for ELIGO-FI steering mirrors. The transmitted power for s polarization was measured to be within the specified 10 ppm for 45 deg angle of incidence, as well as for a broad range (~18 deg), from 33 deg to 51 deg. The transmission of the p polarization for the 45 deg angle of incidence is ~400ppm, with a minimum of ~160ppm at 34 deg incidence.
• Data processing of the thermal lens measurements taken at LLO by Kate, Victor and Dmitry on the absorptive materials of the Faraday isolator (TGGs and DKDP) for ELIGO.

Antonio Lucianetti:

• Wrote a document on the Faraday Isolator installation in the clean optics lab.

LLO Team - Kate, Victor and Dmitry:

• Made thermal lensing and extinction ratio measurements of the eLIGO FI optics. Dr. Reitze and Kate started the FI assembly by mounting the TGGs and quartz rotator. We now have in our possession almost all Class A parts.

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For additional information about this report, contact Albert Lazzarini or Phil Lindquist