Weekly Report for Week Ending January 24, 2008

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 News (Reitze)

• Graham Woan has been elected to serve a two year term as the CW data analysis group co-chair, replacing Maria Alessandra Papa, who steps down after 7 years on the job.  Congratulations to Graham, and thanks to Maria Alessandra for her long service and also to Alicia Sintes Olives for also standing in the election.
• Planning for the March L-V meeting is continuing.
• A document outlining the plans for the upcoming Astrowatch has been circulated to the LIGO-Virgo Data Analysis Council.  The document is intended to inform the global terrestrial gravitational wave community about Astrowatch for coordination purposes and will be circulate to the Gravitational Wave International Committee.  Revisions should be finished next week, where upon it will be circulated to the LSC, Virgo, and GWIC.

LIGO Laboratory Administration (Lindquist)

STATUS OF LSC MOUs (Lloyd)

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

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

• ACIGA is still under review.
• Sannio is pending, requiring changes requested by the review panel.

PROPERTY ACCOUNTING (Luna)

• Assisted Calum Torrie in making shipping arrangements for one crate and one container from CIT to LLO.
• Worked with Peter King and a customs broker in providing proper documentation for a laser shipped from Germany to LHO.
• Writing exports and imports procedures.

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>

• Issued the order for the construction of the Laser Diode room at LHO.
• Provided assistance with Techmart training, access, inquiries, and re-routed the Ares package for final approval and distributed.
• Submitted the Release of Claims to Alliance requesting close out.  It was returned and the file closed.
• Ordered the turbo pump for Bob.

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

• Started expenditure analysis, invoice review, budget review and data entry for January 2008 monthly operations report.
• Requested stipend expenditure type reclassification to correct stipend charges on the old Visitor's Program account (NSFLIGO.VISITO).  Project Accounting is in the process of closing out the PTA.
• Worked with benefits billing to reverse incorrect charges on Low Noise account.
• Prepared three cost transfers pending review.
• Continued to meet with project accounting/IMSS personnel to discuss possible enhancements to operations report (on-going).
• 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>

• Modifications are being issued to the contracts with Air Liquide and Corporate Mechanical Corporation to reflect changes in rates that have recently occurred.

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

• We have submitted additional data to the NSF regarding the Tinsley contract, as requested by their contracts specialist, Ann Miller.  We expect their approval shortly.
• The letter requesting blanket approval of Advanced LIGO imports has been received back from the Department of Commerce with some recommended changes.  We are working to incorporate those changes prior to re-submittal.
• Jay Marx and Ed Jasnow are meeting on Friday with Ann Bussone, OGC, to discuss the proposed arrangements with the Baton Rouge Area Foundation (BRAF) to solicit funds for the outreach activities of the LLO Science Education Center (SEC).

PROPOSALS and REPORTS (Lindquist)

The revised budgets for FY 2008 LIGO Operations have been submitted to the Office of Sponsored Research for approval and forwarding to the NSF.

FY 2008 budget has been developed assuming $29.5 million in funding.  Copies have been provided to Karl for incorporating into the financial reports.  The current version (2.0) includes budget for the deferred items in the appropraite WBS elements.  A change request (CR-080001) has been prepared that would place the budget under configuration control.

HUMAN RESOURCES (Akutagawa)

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

• A Staffing Committee meeting was held on Monday, January 14, 2008.  The minutes and action items have been posted on the SC web page.

Quality/Safety (Tyler)

>From: Bill Tyler tyler@ligo.caltech.edu

• With Linda Turner's help, assembled and updated presentation material for the all-hands safety meeting scheduled next week.  Sent out all-hands meeting notice.
• Made plans with Caltech Safety Office for a hazardous waste class for LIGO campus lab workers.  Sent out request for names of individuals that should attend hazardous waste class.
• Investigated the 40-meter parts cleaning lab hazardous waste disposal and excessive fume problem with the PMA Caltech Safety Office representative.  The concerns were that the existing fume hoods may have been malfunctioning and that sanitary drains were being damaged by dumping of cleaning solvents.  The investigation revealed that the concerns (both) were apparently the result of inappropriate parts cleaning set-up and operator error.  Both items have been corrected and should not be a problem in the future.

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

Summary of activities at LIGO Hanford Observatory (compiled by M. Landry)

• H1 IOO work has nearly completed, with the HAM1 east door rehung and attempts underway to relock the MC in air.  A power budget on the new layout was performed, indicating 96% transmission through the Faraday (see this nice view of the upstream aperature of the FI, i.e. "hard aperature 1" or HA1).  MC1 and 2 optics were drag wiped, MC3 was deemed to difficult/risky to move and do the same.  It was noted that the last steering mirror prior to the MC had a ~6% transmission, owing to its angle being other than 45 degrees.  This loss accounts for some of the poor measured transmission of the H1 MC, and was rectified by the installation of new mirror.  A second important loss mechanism was the baffle of MC2, 8mm too low on the 1" aperature.
• An H1 mode cleaner study performed over the holidays, somewhat hamstrung by neglected data that scrolled off a disk, found absorption levels in MC mirrors to be 20, 41 and 78ppm.  This accounts for some but not all of the observed MC loss, as modeled here, but see above for other loss mechanisms.
• Next week, we intend to relieve the bias on the RM, and revisit our alignment in and around HAM4.
• What is expected to be the last incursion into the H2 vacuum envelope prior to Astrowatch start occured on Wednesday.  The ETMX mass received most of the same treatment as the other core optics (earthquake stop retrofit, PAM gap increase, drag wipe, calibration-based power measurements), except that the bias was low enough that the cage did not need to be rotated.  Barring any problems observed in ETMX, we probably need to pump on MX about two weeks, after which time we can open the volume to the beamtube for nominal Astrowatch start.  Note there was some concern about potential chipping at the contact site between the H2 earthquake stop tips and the chamfer edge of the optic.  The ETMX work, with photos, was summarized.
• HAM6 SEI work continues apace.
• A LIGO version of the Matlab based, GEO-derived dataviewer and analysis tool was installed under CDS.
  

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

• There was an inspection of our entire beam tube.  The findings are summarized in the LLO ilog:
  X-arm report, Y-arm report part 1, Y-arm report part 2.

• The IO group has tested the performance of the new Faraday isolator at relatively high power, and happily does not see any power-related beam shift (ilog ref: here).

CDS Computing (Lisa Bogue):

• Working with Rolf, Brian Lantz, Ben Abbott and Pardeep on ISI installations.  Most of this for me has been learning how to setup a machine for borkspace, figuring out the installation paths for all of the new, extra, front-end related code that didn't exist before. Working through installations of SENDS (Ben Johnson's new nds beta), mDV and ligoDV.  I am feeding back documentation to the developers as appropriate to get better installation guides.
• Matlab r2007b - says it will run on solaris10 but really doesn't.

LLO Outreach (John Thacker):

• Minor repairs to 4 exhibits.
• Prepared and delivered teacher professional development to 9th Grade Physical Science Teachers.
• Prepared and delivered 3 school field-trip programs: 2 elementary and 1 high school;.
• Hosted ST. Tammany Parish senior Curriculum and Instruction Staff for tour and discussion of potential partnership;.
• Participated in Family Science Night program at local middle school.
• Continued work on Next Phase project; completed the LIGO- Exploratorium Activities List.
• Continued work on NSF Annual Report.

Safety & Security (Rich Riesen):

• Spend most of this reporting period in support of the BTE inspection.
• Found no site nor laser safety concerns on this weeks safety rounds.
• Working on the Entrapass laser safety system. It appears that after installing the new software upgrades, some settings were overlooked concerning the card swipe door open condition of  IO tables. This should be fixed in a couple of days. This is not a laser safety concern, rather a minor  inconvence.

CDS Electronics (Rusyl Wooley):

• This week we completed the installation of the ISI electronics in the new racks at the CDS high bay.  We installed the field cables to HAM6 and began checkout of the controls.  We are still working through several fiber optic communication issues.  Rolf Bork and Ben Abbott are here to assist in this effort.  We were unable to make any further progress on the vacuum system due to other work that had priority.

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)

• The Wednesday night rains caused a flood of water and mud in the 40m control room and IFO hall vertex area. Quick hard work by Andrey, Alberto, John, Steve and Rana staved off any major equipment damage. The next-door construction crew had blocked up the storm drains, causing a lake to form at the 40m north wall, and water seeped right through the wall. The Caltech facilities person came and unblocked the drains. bu Thursday noon, Steve and the janitor had cleaned up the floors and electronics racks, and the crew is starting to bring things up. Looks like there's no major damage.
• Rana conceded a bet yesterday, and treated the 40m team to sugar napoleons.
• Rob, John and Andrey are making great progress in locking. After overcoming several obstacles, they got the interferometer fully locked in a power-recycled FPMI state, and measured a noise spectrum that is not much different from what we had months ago; it bottoms out at ~ 2e-18 m/rtHz in the 1-3 kHz range. There's more noise at 100 Hz, but that is understood and can be reduced.
• Then Rob did some dual-recycled Michelson locking. He's working on a bunch of issues, including the handoff to the double-demod signals.
• Andrey has succeeded in measuring the suspension Q's as a function of damping gain, getting good results. He continues to work on minimizing the XARM noise by optimizing the damping gain of the TM optics.
• Our RGA controller is back from repair and Steve will re-install and test it out, soon.
• Alberto continues to perfect his RF filters for the MC transmitted RFAM monitor. He's designing low-pass filters to make the LC resonant circuits more symmetric, to achieve -40 dB of attenuation at +-33 MHz around each filter (33, 133, 166, and 199 MHz).
• Tobin and John are testing a long fiber to see if it can bring a PSL pickoff beam to the ETMs for auxiliary laser arm locking, with acceptable phase noise. In doing so they used our GigE camera for a physics application for perhaps the first time, viewing the transmitted mode from the fiber during initial alignment. Meanwhile, Sam is doing a similar fiber test at LHO.
• Kentaro is here. He's using Optickle to study the response of GEO600, and is trying to understand why they don't see an opticle spring at 10 Hz where they expect it. Rana suspects the problem is due to the difficulty in understanding the triple-pendulum suspensions (and aux loops) at 10 Hz. Kentaro is also working on the design of a 10-meter SQL interferometer at Hannover.

---

Thermal Noise Interferometer (Black)

• Akira and Innocenzo have been working together to analyze our recent data on optimized coatings, and Tara is setting up the photothermal experiment in its new location.

---

LASTI (Mittleman)

BSC-ISI

• Mostly we have been waiting for bolts this week. The silver-plated bolts to replace the galled bolts are taking longer then expected. We are going to “borrow” a set of bolts from a shipment destined for one of the sites and reinstall the lockers on Monday.
• The engineer from PSI who has designed our actuators visited this we and showed us how to open up one of the actuators, so we now have the ability to do that.

Noise Prototype Suspension

• Mostly we have been working with the UK people on ways to fix the blade spring problem that was discovered last week. We are still exploring various options, more bolts, stronger bolts and redesigned clamps are the options.

CIT Science Group (Weinstein)

_________________

Antony Searle:

• Initial project presentation to bursts group, and integration with X-Pipeline community.
• Prototype implementation of full Bayesian search in X-Pipeline branch, now being tested.

_________________

Kipp Cannon:

• Worked on validating some new injection code in LAL.
• Attending DASWG authorization & authentication hackathon at CIT.
• 2 LSC publication reviews.

_________________

Gregory Mendell:

• My data analysis time since my last report has been spent following up on comments I made on upcoming CW papers.

_________________

Anand Sengupta:

• Added a page to highlight the effect of e-thinca bug in the high mass search.
• I retagged the lal/lalapps code with the ethinca bug fix in.
• Re-analysed V3 cal data (playground) using this code.

_________________

Amber Stuver:

LIGO Research

• Completed webpage documenting my work on evaluating the likelihood of a candidate GW event given its detection delay and the observed SNR values.  It can be viewed here. I plan on presenting this work to the CBC group in the near future.
• Finished taking the electronics RUN/ACQ transfer functions (coil IMONs/LSC_EXC) and sent them off to Hanford for comparison.
• Attended the h(t) review telecon and have started looking into the effect of the calibration factors in the production of h(t).  I am still catching up on the work that has been done thus far.

SEC Work

• Lead a classroom activity with ~40 9th graders dealing with thin film interference.
• Presented the giant slinky exhibit to ~45 5th graders.
• Gave control room tours to ~130 students.

Other

• Completed draft of poster that I am presenting at the APS Graduate Education conference at the end of the month and submitted it to the Forum on Graduate Student Affairs (whom I am supposed to be representing) exec. board for review.  My abstract has been posted on the conference page and can be viewed here.

Laboratory Computing (Anderson)

LDAS Software Systems (Maros)

• The build rules for building the LDAS software packages have been modified to support parallel builds (PR#2597). This better utilizes the multiple CPUs that are available on the build systems.
• In an effort to have a single source for third party packages, the rules for building LDG ClientPro for Solaris are being enhanced to support 64-bit builds of globus and pyGlobus (PR#3228). Next week should also see the introduction of TCLGlobus to the Solaris ClientPro target.
• Work continues on converting the C++ source documentation tool from PERCEPS to Doxygen (PR#3187).
• System testing of LDAS was done using version 1.9.178 of the software. The main test script successfully automated the running of most of the system tests. lsyncTest and createRDS each had problems and had to be rerun from the command line. The script testing the database performance continues to core dump when running dims of 10 and 1000 (PR#3217). When set up on a standalone system, the script runs for all dims without core dumping.
• The system tests are also being run on a standalone box to ensure the site neutrality of the test scripts. Because the system has fewer recourses available, the job mix of concurrent jobs has to be reworked.
• Work was also done on integrating the datasock network traffic test into the automated test suite.

LDAS System Administration (Anderson)

Caltech

(Dan Kozak)

• Got some info (and a new caseworker) on the morbo crash problem.  Now they're trying to determine if what we're seeing is a version of one of a couple of bugs they've seen before.  If so, we may be able to get an IDR patch.
• Configured vdisks/volumes on new 6140s.
• Got the last of S5 ingested at CIT (from LHO).
• Set up Ed with ssh public key access to grid@ldas-sw.
• Participated in planning for new filesystems.
• Mounted ldas_outgoing on Linux part of tandem systems.

(Phil Ehrens)

• Since 12/19/2007, when the fans in the cluster were set to be speed controlled by the thermistors on the motherboard, a total of six fans have failed. This is in contrast to the ~ 3 fans per week during the preceding month.  Fans failing recently do not exhibit the missing blades observed formerly, which may be due to earlier detection or to modified failure mode at lower speed. 

MIT

(Fred Donovan)

• Cleaning up account updates, updating gmond monitoring of disks (web interface).

Hanford

(Greg Mendell)

• Since my last report, I have worked with LDAS to fix a problem with the tape catalog at LHO,  continued to implement the LDAS astrowatch plan, continued working to make sure the C03 h(t) data and trend data are have transferred successfully between the sites and CIT, and worked on several LDG issues.

General Computing (Wallace)

MIT

(Fred)

• Mostly xp desktop issues: inc. new install for visitor.
• Mail filter issues.
• Software installs.
• Deactivating some old machines.
• Gravity/nova issues: LDR software, migrating automounts to local file systems.
• Fixing some broken xp backups.

Livingston

(Dwayne)

• Received second new MacBook for SEC staff.  Various configuration and installation on said MacBook.
• With Shannon over the weekend, replaced a failed disk in LLO WAN Router.
• With Shannon over the weekend, replaced failed disk in mail server, had to restore from tape backup losing approximately 20 hours of email traffic.  Temporarily switched to an external SCSI drive.  Hope to replace with a new raid soon.
• Tweaking the look and feel of the Inventory Control system, getting ready for demos to other sites.
• Adding more documentation to the GC wiki.
• Moved all GC network printers to the new network.
• Received Toshiba IP camera to be installed in the LVEA.  configuring and testing ongoing.
• Ongoing migration of servers and workstations to new subnet.
• Other usual/unusual user support requests.
• Cleared spam trap.

Hanford

(Christine)

• The primary network went down last week during Jay Marx's visit.  The backup network was still down from Dec 19th.  After pleading with Lockheed Martin, they were finally able to connect the backup network fibers to the correct circuit and the backup network was restored at about 4p.m. on 1/17.  The primary network was down due to problems at PNNL which required ordering special parts.  The primary network was restored at 2:30 p.m. on 1/18.  The BGP peering with ESnet worked flawlessly and automatically as the networks were brought up.
• Lots of support for new visitors as Astrowatch starts.
• Set up two new MAC laptops, upgraded to Leopard and secured using the CIS guidelines.
• Took down the old mail/web server.  Ran in to a few problems in that some people had used the server name in their email address and are having to contact people to use their new email address.  Also a weekly reminder email cron job from the old server had to be set up on the new server.
• After patching all the Solaris 10 computers, they all developed a problem with the Sun patch management system not being able to communicate with the Sun patch server.  Had to install many more patches trying to fix the problem, but they didn't work.  Looks like the problem is that the patch management software tries to ping the sun patch server and if it doesn't get a response it goes into error mode.  My site firewall doesn't allow ping from off-site.  Now I'm going around disabling patch management on the Solaris 10 computers.

Caltech

(Mike)

• Working on loading a server to host DCC. This is an ongoing project.
• More work on securing lscweb & gwic web-servers.
• Continued work in our server room 18 putting together a server rack. We are just about ready to load this rack with servers from another rack that is being shipped to Hanford.
• Additional work on our wireless access points cleaning up old mac addresses.
• Trouble shot a network connection with Christian. This turned out to be a problem with one of our edge switches. Rebooting the switch seems to have fixed this issue.
• Other misc. user support and sysadmin work.

(Veronica)

• LSC:  Ongoing work on the website for the March meeting. Setup/troubleshoot of the online registration; working on the credit card payment utility.  Contuinued work on the redo of ligo.org. Updates of the database of technical papers, other we updates.
• LIGO:  High-res images for NASA.  Various web updates.
• CaJAGWR:  Website updates/ user support.

(Christian)

• Riccardo Desalvo - Configured new workstation with Matlab and Mathematica.
• Ed Jasnow - Replaced old monitor with 24 LCD monitor.
• Toner cartridge replacements - 3flr W/B and 40 Meter.
• Ken Mailand - Can’t login to Ansys 11. Removed two files in system32 folder that were causing Ansys to crash.
• Reloaded laptops that were returned from MIT to the loaner pull this week.
• Other misc.: Continued onsite software/phone support.

(Melody)

• Worked on the mediawiki's security features:  More refined usergroups and user authentication over Apache.

(Larry)

• Spent more time than normal with different sales reps. Most of the time was spent looking at new conferencing equipment. There are definitely some new items to look at. Distributed a number of items that had been received and ordered some misc. items for different users.
• Working on different logistical issues for the meetings coming up.
• Spent time working with Shannon reviewing some of the different logs.
• Setting up different mail support items for different users.
• Worked on a couple of backup items and moving items to tape.
• Some debugging on one of the edge switches. Part of this is to help in programming the new edge switches.
• Regular end user assistance.

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 explained his study of the coherent effect of HAM1 and HAM2 on the frequency noise induced by MC. See his report below.
• Mark mentioned that he or his student will explain the effect of the ribbon used in the suspension in the coming e2e meeting.

Static IFO simulation (Hiro, John)

• Hiro discussed with Kentaro Somiya about the effect of the mode stability in the cavity formed by PRM and SRM.
• Hiro is developing the simulation code and setup to study the effect of the error of PRM ROC and SRM ROC on the RF sideband field modes.
• Hiro started to summarize his simulation results about the thermal effect, aberration and the recycling  cavity to be ready by the meeting scheduled in the week of February 4th.

Modeler : e2e simulation engine and ALFI : e2e front end (Hiro, Bruce, Melody)

• John is learning modeler and alfi so that he can take over the task Bruce did to implement "UserDefinedPrimitive" class. This is a module with user defined numbers of input and outputs of any user specified types.

Mechanical Simulation for advanced LIGO (Sany and SLU team)

• Considered the effect of coherence between HAM1 table and HAM2 table displacements on Mode Cleaner’s length fluctuation. Previous measurement shows that the HAM table’s coherence is over 0.9 in dc to 1.2 Hz and then gradually decreases to 0.7 around 5 Hz. This indicates that for a given HAM table motion and the MC length control servo gain setting, the differential motion of the MC optics, hence the MC length fluctuation, is (1-coherence)=1-0.9=0.1 smaller than the case when three MC suspended optics’ motions are totally incoherent. The corresponding frequency noise in the arm cavities should be lower in proportion. 

Prestabilized Laser

From: Peter King pking@ligo.caltech.edu

PSL

• The instrumentation rack was moved from Lauritsen to West Bridge. Thanks to Larry and Christian for helping Lee and myself carry the rack down the stairs - as it was too large for the elevator.

AdL PSL

• The EnL 35-W laser for LHO arrived in the country today.
• Identified an AOM driver that allowed an external frequency reference input for phase locking the output.  The unit costs about 1200 euros for the variable frequency model and about half that for the fixed frequency version.

Seismic Isolation

From: Ken Mason kmason@ligo.mit.edu

BSC Seismic Isolation Assembly and Test

• Scott Stewart from PSI visited MIT on Thursday. He walked us through the disassembly of one of the large actuators that was giving us problems. A piece of shim material was removed from the actuator along with small bits of aluminum and polyimide flakes. The actuator was cleaned and reinstalled onto the structure. Scott also presented several options to increase the actuator gaps which will make installation much easier.
  
• The seized screws in the locater caps were removed. We are still waiting for silver plated screws to replace them.

Single Stage HAM Assembly and Installation

• We have received the clean hardware, locater parts, actuators, and GS-13 parts in Livingston. We are planning on placing the stage 1 assembly onto stage 0 on Friday.
• Brian L, Ben, Rolf and Pradeep are at LLO helping with the assembly and installing the electronics. Hugh, Rich, and Pradeep will be at LLO next week.
• The Trillium 240 seismometer has arrived at Stanford and is being tested by Daniel Clark as a replacement for the STS-2 seismometers

Suspensions

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

Advanced and Enhanced LIGO

• Output Mode Cleaner: Norna and Calum have assembled the OMC with the metal bench, locked it down and packed it in its shipping container for pick up this morning. It will be at LLO next week, along with Norna and Sam. A secondary box of tools will be shipped at the same time. We need to review some small items on the OMC structure drawing before we send it to Mike for fabrication of the second weldment for LHO.
• Recycling Mirror Suspension: We've checked the piece part drawings for the recycling mirror and they've been given back to Greer. We've also given him a redlined copy of the structure weldment. Bob confirmed the height of the suspension and sent around a sketch. Bob sent me the drawings for the RM blades to review and send out for RFQ. It is my intention to send out the RM and IMC blades for RFQ together. Greer is finishing up on the mounting pads.
• Input Mode Cleaner: Calum reviewed the blade drawings and sent them to me for fabrication. Mike and Derek are working on incorporating the cam into the design.
• An ANSYS class is being scheduled at LLO for Feb 21 & 22. 

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

• OMC SUS work: Spent most of the week at 40m annex assembling, testing, adjusting, locking down and packing the clean OMC SUS (in all-metal configuration) with Calum, plus assistance from Bob Taylor and Ken Mailand. Big thanks especially to Calum who came in on several days on or before 6am to assist one of the engineers from the Aeroshop with helicoiling. Two crates are now ready to be shipped out Friday 25th AM to LLO.
• Auxiliary optics: Had telecon with Janeen and Dave R on requirements for types of suspensions from the IO group, stepping through the two alternative recycling cavity layouts.
• Held monthly SWG telecon (minutes posted on SWG elog).

From: k mailand kmailand@ligo.caltech.edu

Adv. LIGO

• Assembly  of the frame for Sam's OMC bench assembly /shipping frame is complete in the 40m clean room.
• I'm doing an input test mass drawing for Eric Black/ Helena.
• 15 Ham table beam dumps are in process to be delivered by Feb. 4th. 5 Ham table side beam dumps will also be delivered by the 4th., for Sam Waldman, and are on schedule.
• The black glass pieces for the Ham mounts have been cut to size and arrived at CIT , some will go out for a 1064 ar coating.
• I'm working on a eddy current damper for the faraday isolator, also brakes and handles for the quad installation arm.
• I'm working on a end station beam dump, metal, to be black porcelain coated and suspended , for Mike Smith.
• Three different vendors have sent samples of their jet cut black glass process, and are complete at CIT for evaluation.

Core Optics

From: Helena Armandula ahelena@ligo.caltech.edu

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

• The Tinsley contract is still at NSF for review.  Tinsley has received a draft of the contract for preliminary review. Material is ready to ship from CIT.
  A change order to the QED contract, for additional polishing, has been submitted to contracts.
  
• COC PDR documents are scheduled for release Feb 7th for a review mid February.  This will be a fab readiness review for the material.
  

From: Liyuan Zhang <zhang_l@ligo.caltech.edu>

• One of the six chamber witness mirrors from LHO was scanned for the HR absorption and compared to a same type mirror which was cleaned before the measurement. No evident increase of absorption was observed. The measurement for other samples is underway.

Auxiliary Optics

From: Michael Smith smith@ligo.caltech.edu

ADLIGO

• IFO LAYOUT: Mike corrected several errors and has published a revised recycling cavity length document on the ADLIGO Wiki, T080007-01. The HAM chamber geometry is the actual chamber geometry with internal brackets. In addition, the max modecleaner cavity for the folded-stable IFO was increased to 34524 mm (the increased modecleaner length does not appear in the Rev 01 doc.) Stephan has calculated recycling cavity lengths that are compatible with the available mirror locations for the folded and non-folded stable recycling cavity cases.
• SLC: Luke presented a conceptual design for the LASTI prototype arm cavity baffle assembly with the louver arm cavity baffle fabricated from porcelainized steel.
• ETM PO TELESCOPE: Peter Fritschel agreed that ISC will be responsible for the intensity attenuator for the ETM output beam.

ELIGO

• TCS: Aidan is working on the electronics interface for ELIGO.

Input Optics

From: David tanner@phys.ufl.edu

UF LHO Installation Team (David, Volker, Muzammil, HsingJung and Rodica):

• LHO Faraday isolator installation; measurements of power budget.
• Beam alignment in HAM1 and  HAM2 (in air)
• Mode matching adjustment - MMT2 relocated on HAM2

LLO Team (Dave, Kate, Antonio):

• IOO beam alignment.
• Characterizing the mode cleaner.

Luke:

• Preparing eligo docs for DCC submission.
• AOS suspended baffle designs.
• Preparing for all-hands safety meeting talk.

---

For additional information about this report, contact the editor.