Weekly Report for Week Ending December 13, 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

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LSC Issues (Reitze)

• The LIGO-Virgo meeting took place in Boston this week, with a total of 107 LSC and Virgo members attending the meeting.  In addition to updates from each of the search groups, members participated in lively discussions on the merits of convening and astrophysics advisory committee to the LSC as well as the process by which the LIGO and Virgo collaborations would certify a gravitational wave event candidate.   After the L-V meeting, many LSC members stayed on for the GWDAW conference.
• "The S3 SBBH paper ("Search of S3 LIGO data for gravitational wave signals from spinning black hole and neutron star binary inspirals") is now on the arXiv: < http://arxiv.org/abs/0712.2050>".

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.

  MOU	Attachment
  Andrews University	DAT, OPS, Z
  Carleton College	DAT, OPS, OUT, 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 is still under review.
• Northwestern, Sannio and Washington State are pending, requiring changes requested by the review panel.

PROPERTY ACCOUNTING (Luna)

• Assisted D. Ingram at LHO with packing and shipping a Multimeter and a Function Generator (surplus property) from CIT to LHO.
• Assisted K. Mason at MIT in making shipping arrangements for two crates from AstroPak in Downey, CA to LLO.
• Assisted K. Mason at MIT in making shipping arrangements one box from High Precision Devices in Boulder, CO to LLO.
• Assisted B. Taylor in clearing a shipment from U.S. Customs.
• Assisted H. Armandula with shipping a container to CSIRO, Australia.
• Created and submitted an Asset Retirement Form for a computer.
• Assisted  G. Billingsley in making shipping arrangements for two Fused Silica Blanks from CSIRO, Australia to CIT.

DOCUMENT CONTROL CENTER (Turner, Mak)

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

• Processing talks from this week's LSC/Virgo Collaboration Meeting @ MIT.

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>

• Ironing out the issues on the LSU subcontract.
• Working on the Air Liquide contract.
• Working on the two renewals for Dynamic systems.
• Moved funds and assisted Payables with the adjustments necessary to effect payment on MIT.
• Followed up with vendors on the status of modifications and contract closures that are still pending. 
• Provided assistance to Techmart requisitioners and responded to inquiries.

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

• Completed and posted November 2007-FY2007 & November 2007-FY2008 operations reports on the network.
• Requested various purchase order fund transfers.
• Met 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>

• Discussions are being held with Caltech Purchasing regarding the exact format of Modification No. 4 to the contract with CSIRO.  The issue concerns the conversion from Australian to U.S dollars.  A meeting has been scheduled for Friday, December 14 to resolve this.

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

• In response to a request from the NSF, we are providing a list of all subcontracts over $250,000 awarded in FY07.

PROPOSALS and REPORTS (Lindquist)

The NSF Monthly Report is due this week.  Still waiting for some input.

Iterating on the FY 2008 budgets.  Status will be presented during the Executive Committee Meeting on Monday.

HUMAN RESOURCES (Akutagawa)

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

• [There was a staffing committee meeting this week. –pel]

Quality/Safety (Tyler)

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

• Nothing significant to report this week.

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

Summary of post-S5 Activities at LIGO Hanford Observatory

(compiled by M. Landry)

• Enhanced LIGO work this week included much effort in the vented 4k vertex and 2k X-arm beam-manifold regions. Fused silica-tipped earthquake stops were first retrofitted for the 4k ITMX and ITMY masses, then for the 2K ITMX mass. PAM gaps were measured on the 3 ITMs and found to be smaller than anticipated. The X-arm baffle and glass were removed and stored, eliminating these as scattering sites for S6. Bias adjustments to the x-arm masses are to follow.
• UFL is here in force, working in the optics lab, prepping the Faraday Isolator for 4k HAM installation in January.

Outreach (D. Ingram)

• Yakima Valley/Tri-Cities MESA has added middle school outreach to their portfolio with the help of some additional State funding. Middle school classes in Yakima, Granger and Pasco have made December visits to LHO via their MESA partnerships.

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

VE work for enhanced LIGO (Rusyl Wooley)

• This week Gary completed breaking down the baffle supports in the X and Y beam manifolds.  He also completed the drag wipe of ITMX and ITMY.  Mike Zucker is here and helped us put together a program for replacing the 84" HAM covers.  We then installed the the 84" cover on the north nozzle of HAM1.  The installation went without a hitch and took approximately 1 hour.  We installed the conflat blank on the septum plate in HAM6.  It had been removed in order to install the beam dump.  We also installed the 84" cover on the west nozzle of HAM6 and the 60" cover on the east nozzle of BSC1.  We also put IOT1 back into position at HAM1.  IO work continues.

IO rework (many)

• Most IO optics are correctly placed and aligned, save some beam dumps.  The mode cleaner now locks again!  Also, see IO work status summary here: http://ilog.ligo-la.caltech.edu/ilog/pub/ilog.cgi? group=detector&date_to_view=12/13/2007&anchor_to_scroll_to=2007:12:13:20 :54:47-cactus9

LLO Outreach (John Thacker)

• Data Input for school visits.
• Scheduled teacher workshop (sponsored by APS) 4/28/08.
• Prepared and presented Program for SLU Lab school (elementary).
• Prepared and presented program for Denham Springs High School.
• Prepared and presented program for Albany High School.
• Worked on new Astronomy Activity.
• Downloaded Pics for SEC webpage.
• Contacted 4 schools - post-visit survey reminders.
• Committed to Copper Mill Elementary schools to conduct an in-service for 5th grade teachers and worked on a program.
• Mailed pre-visit packets to Schools visiting in Jan. 2008.
• Discussed admin matters with Southeastern La university: for teachers attending PD this past summer from SLU.
• Scheduled teacher PD in April.
• Scheduled school field trip requests.
• Committed to invited APS talk at March meeting in New Orleans.

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)

• Rob is preparing a response to the referee comments on his DC Readout Amaldi paper.
• Tobin wrote a script to automatically measure the in-loop and out-of-loop RIN of the PSL instensity stability, with the servo on and off.
• Tobin is working on resuscitating the readout of the 40m weather station, which hasn't worked in years.
• Alberto is designing and testing filters for the broad-band MC RFAM monitor circuit.
• Tobin fixed the Mach Zehnder autolocking script so that multiple copies can't run.

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Thermal Noise Interferometer (Black)

• We are still having difficulties locking the interferometer in its new location. The mirrors with the optimized coatings have significantly higher substrate Q's than previous test masses, and Akira has built several new notch filters to keep these from ringing up. (This issue is, of course, unrelated to the move.) The mode cleaner is still not staying locked long enough to take noise data, in spite of the fact that its servo appears to be in spec. At this point we are not sure what the problem is, and we are measuring seismic noise to see if it is any different in the new location. The problem does NOT appear to be in the OSEM's, the laser, or the electronic servo. If the problem is seismic noise, we will have to improve our isolation, build a more aggressive servo, or both.

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LASTI (Mittleman)

• No report.

CIT Science Group (Weinstein)

___________

Kent Blackburn for the Grid Computing R&D Group:

GRID APPLICATION DEVELOPMENT

• Einstein at Home development:
  • Held third telecon with German Grid developers to discussing progress and strategies.
  • D-Grid collaborators able to run at UWM via fork manager.
  • Waiting for Condor upgrade at UWM to test and debug.
• OSG-PROD  activity:
  • Still troubleshooting at UWMilwaukee site: problems associated upgrade to OSG 0.8.0 and compatibility with CentOS.
  • Testing WS-GRAM submission testing at UWMilwaukee site.
  • Waiting for MOU approval to start trouble shooting with Karan Vahi at: UFlorid_HPC, UWMilwaukee and other sites where data staging is needed.
• LDG (LIGO Data Grid)-OSG activity:
  • Troubleshooting NEMO with Scott Koranda.
  • Continue to learn Basic Python programming.
  • Read Pegasus and Condor documentation on using Glide Ins.
• Writing Documentation:
  • Running Inspiral Hipe on OSG.
  • Running Inspiral Hipe on LDG.
  • Installing GLUE, LAL, LALAPPS.
  • Generating Inspiral DAG/DAX.

OPEN SCIENCE GRID MANAGEMNT

• Contacted institutional PI for last remaining SOW that needs to be signed by PI before review by Resources Managers in an effort to complete all SOWs through to the Director by end of year.
• Held telecon with OSG Project Associate and Resource Managers  to discuss strategies for January's OSG Review in Washington, DC.
• Attended OSG Site Administrator and OSG Executive Board Meetings at Fermilab.
• Attended meeting with dCache developers and OSG Executive Director to discuss LIGO's experiences running binary inspiral workflows on sites with Storage Resource Management and in particular, the possibility of running at a dCache storage site. This was carried out by Charles Huang back in the spring on the Caltech ITB cluster. The Caltech CMS cluster site admin attending the meeting at Fermilab offered to let LIGO use their site for further testing. Have started to explore what is needed in the way of changes to Pegasus parameters to repeat Charles' earlier experiences on a dCache site with significantly more experience.
• No new applicants for the replacement for Charles Huang to work on the OSG Integration Testbed. Made a "pitch" in the OSG Site Administrator's Meeting at Fermilab for any names of interested candidates.

___________

Amber Stuver:

• LIGO Research (IFO Diagnostic Scripting):
  • Fixed several coding issues in the existing ifoTest scripting framework.
  • Added a few more diagnostics tests (working on ETMX like I have been) and am getting results that are consistent with expectations (from filters, etc).
  • There are still a few non-critical technical issues that need resolved but this work getting close be being ready to use for diagnostic purposes.
• SEC Outreach:
  • Did an hour long classroom activity twice to a total of about 40 Jr/Sr high school students.
  • Presented an exhibit (Giant Slinky) to about 75 students (~25 3rd grade, ~25 6th grade and ~25 11th & 12th grade).
  • Gave control room tours to a total of ~90 students.
  • Observed and assisted with a new (to me) classroom activity.

___________

• Igor Yakushin, Greg Mendell, Kipp Cannon, Joe Betzwieser, Pinkesh Patel, Dew Keppel, Stefan Ballmer, Alan Weinstein, Keita Kawabe, Mike Landry, are all at the LSC-Virgo / GWDAW meeting.
• Mike presented a LV talk on Enhanced LIGO.
• Keita presented a LV talk on the Calibration review.
• Kipp presented a GWDAW poster on A Bayesian Coincidence Test for Noise Rejection in a Gravitational Wave Burst Search.
• Stefan presented a LV talk on Status of the Spherical Harmonics Decomposition Search.
• Joe presented, with Matt Pitkin, a talk on the new Crab pulsar paper.
• Pinkesh presented a GWDAW poster on Resampling Algorithm to calculate the F-statistic.
• Drew presented a LV talk on Status of the S5 CBC searches and a GWDAW talk on Innovations in the LSC's Binary Inspiral Search Pipeline.
• Alan presented an CBC Overview talk.

Laboratory Computing (Anderson)

LDAS Software Systems (Maros)

• The tool used for documentation of the C++ code is being changed from PERCEPS to Doxygen. The initial phase has been completed. The more detailed correction of the documentation will happen over the next couple of months as the various components are modified to address other problem reports.
• Work continues on automating the generation the nightly test results report.
• The system testing of LDAS was done using version 1.9.137 of the software. This week saw the inclusion crawlin.tcl to the automated system testing script. There are authentication issues with the datasock test which have been reported to the system administrator. Work has also been done on ensuring the automated system test works on systems other than ldas-dev.

LDAS System Administration (Anderson)

Caltech

(Dan Kozak)

• Installed latest firmware on all 3510s (except 3510-11 because of /export).
• Had Sun replace 9940 drive 0,0,10,19 and got it running again under SAM-QFS (required reboot of opterondata-cit).
• Called in bad 3510-11 disk.
• Worked with Sun on problems with ssum under SAM-QFS (ongoing).
• Installed patch from Sun to try fix morbo crash, but it crashed again.  Sent them a new crash dump.
• Worked with Jim Covington to move tape storage cabinets in Powell-Booth out of room 2B and next to the silo.  More than half done.
• Ran cluster frame check--there was one new bad frame on node154 which I replaced with good copy from /archive. 
• Began copying Hann windowed SFTs from cluster storage to /archive.
• Started work on figuring out how many T10K tapes we should order and where they should go (ongoing).

(Phil Ehrens)

• The usual certificate related tasks and user support.
• Ongoing support of MOU review process and data management.
• Developed software components for command-line updating of BIOS revision and CMOS settings.
• Reconfigured access restriction model for webserver on dziban to support GWIC Wiki for Jay Marx.
• Updated CMOS settings on all nodes so that fan speed is controlled via the 3-wire interface. This was done because the nominal fan speed is reduced by ~ 20%, resulted in extended fan life.
• Replaced failing drive in ldas-suntest4 with one of the drives from the E450 decommissioned from the 40 meter.  The replacement drive has since failed as well.

MIT

(Fred Donovan)

• lsc/gwdaw12 conference all week ...

Hanford

(Ben Johnson)

• Astrowatch finally tested successfully at LHO. One percent now working, as well as control room segment submission.
• The test 3511 with new firmware tested. It receives and returns the correct bytes (tested with frame files and FrChecked).
• fb0 has new sccli v2.4.
• scsi kernel tweaks made to fb1@LHO. Framebuilder appears to be working stably.

General Computing (Wallace)

MIT

(Fred)

• LSC/GWDAW12 conference all week ...

Livingston

(Dwayne)

• Submitted work permit for kantech upgrade to potentially take place this Saturday.  I will know by later this afternoon if we will be able to proceed as planned.
• Finished upgrading two Solaris workstations to Sol 10 U 4 and LDAP client.
• Received a couple new PCs, one replacement, one for a new hire.
• Installed software on new hire PC.
• Working a problem with the auditorium lights.  the switch has been removed and supplier will attempt to fix it in their shop, as the model is no longer made.
• Re-installed OS X on a PowerBook.
• Noticed a problem with old user profile settings when doing the Sol 10 upgrades.  It requires that users change some settings in their profile.
• Other usual/unusual user support requests.
• Cleared spam trap.
• LLO mail summary for  7 December 2007 - 13 December 2007:

  Rejected:  18,623 (18 containing virus)

  Accepted:  4,080

  Total: 22,703

(Shannon)

• Set up the first test run of the Solaris Security Toolkit on a workstation.  Have deployed it before on servers, however not on a workstation which had to be an NFS, LDAP, etc. client.  Couple of hiccups, partly due to errors on my part.  Natalia has agreed to be the "test case".  Will distribute my notes and configurations soon once I get rid of the bugs.
• Continued working on the wireless.  Since RADIUS is not currently working, I am going to punt and set up the "guest" wireless at this time like the existing GC wireless, only on the new network so that users can take advantage of the multi-homed IPs in case of network outage. Captive portal, etc. is not yet a lost cause... just haven't gotten a working implementation of RADIUS/LDAP/TLS yet.  May end up needing a commercial package if FreeRADIUS is not up to the task.
• Set up the CDS network allocation.  It is ready to go whenever CDS is.

Hanford

(Christine)

• The spam and virus filtering on the new mail server are working now. Everyone has been asked to start using the new mail server.  I plan to shutdown the old mail server next week.
• Finished copying files from the old web server to the new web server. Downloaded and installed the latest version of Calcium web calendar. Moved all the old calendar files over.  Plan to start using the new web server next week and shutdown the old web server.
• Worked with Mike P. a little to get a new VPN server going for the Advanced LIGO people.  Mike got everything working and moved Dwight over to the new server.
• Responded to a request from Fred R. to cut or defer some of my planned FY08 expenses.  Called my contact at ESnet again to request a cost for network services for FY08.  Left a message again, but no response so far.

Caltech

(Mike)

• Work the whole week at LHO helping Christine and Dave Barker loading computers with updated version of Solaris plus cleaning up some network/video cables.
• Other misc. sysadmin tasks at Caltech working off-site.

(Veronica)

• LIGO:  Work in progress on the homepage update.  PAC23 meeting support, started working on the website for the next meeting.  Misc web updates /user support.
• LSC:  MOU database and backend -- made modifications for a more intuitive document lookup.  Updates of the database of technical papers.  Misc web updates.

(Melody)

• Working on Nergis' wiki requests. Finished the simplified data entry screen for the Thesis Topics table.

(Christian)

• Working at Hanford this week.

(Larry)

• Worked/working a number of different procurement items. New licenses being purchased for different packages. Purchasing more misc. hardware and a couple of workstations. The notebook for a new employee has been ordered.
• Spent time trouble-shooting one of the printers. The problem is a bad memory module and the replacement should arrive in the next day or so. Made changes on a number of workstations so people could print to another printer for their big jobs.
• Spent time working on different user environments. Finally, got a ghostview problem cleared up for one of the users.
• Participated in the walk-thru for a cabling upgrade at the 40M.
• A good deal of time was spent helping users move over to another mail server. So far no major problems.
• Worked with different people concerning the logistics of meetings/conferences that are coming up.
• Setup a new user and activated a couple of old accounts.

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

Modeling and Simulation (Hiro Yamamoto)

• Hiro met several Japanese GW people about the status of LCGT and related issues, and the summary was report to Jay.

e2e Weekly Meeting

• Sany explained his work on the back reaction effect on the HAM-SAS and  the HAM1-HAM2 motion coherence and its implication on the frequency noise.

Static IFO Simulation (Hiro, John)

• John kept writing a code to map the measured phase map data to a format to be used in the FFT simulation Hiro and John discussed how to evaluate the aliasing effect when a fine grid size is used to study the aberration effect at 1mm spatial frequency region.
• Hiro started the comparison of stable and marginally stable Michelson cavity in regards to the SB. When the RM curvature is off by 1%, for the marginally stable case,  the error signal at ITM got a phase of 0.11 due to the phase / radius  mismatch of CR and SB, which corresponds to 1% of lambda. With the  same error, the stable cavity configuration shows no effect.
• The new design of the stable cavity configuration is better than the previous design and the loss due to the curvature mismatch is much smaller.

Mechanical Simulation for advanced LIGO (Sany and SLU team)

• For the purpose of estimating the correlation between HAM1 and HAM2 table X motions (in the direction of the X-arm), computed the coherence between (MC1+MC3) and MC2 pos OSEM signals. These OSEM signals were recorded in 2004 at LLO with all the optics freely hanging. (Since MC1 and MC3 are respectively oriented 45 deg  counterclockwise and clockwise from the positive X axis, the addition of MC1 pos and MC3 pos signal is proportional to the average X motion of these two optics. On the other hand, MC2 is oriented normal to the X axis. Therefore, the coherence between these signals indicate the coherence of the HAM tables' X motions.) The computed coherence is fairly high (>0.9)  in dc to ~2 Hz, and then gradually decreases to 0.7 or so at ~3.5 Hz (except for the small optic's resonant frequencies and their harmonics). This frequency dependence is similar to the floor correlation we recorded in 2003 at LLO's corner station.

Prestabilized Laser

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

PSL

• I have been moving equipment out of Lauritsen and into the sub-basement of West Bridge.  The move is hampered a little by the elevator not working.

AdL PSL

• The communications fibres and Ethernet switches have been ordered. These should arrive at the observatories the week after next.
• A draft SOP for the 35-W laser has been circulated for comment.  Also have been investigating multi-wavelength laser safety eyewear.
• Still waiting for a quotation from Knurr for the 19" racks.

Control and Data Systems

From: Rolf Bork rolf@ligo.caltech.edu

AdL SUS

• Initial bench tests of the first UIM coil driver show that the unit matches the simulations and meets specifications. The first Top coil driver has been shipped and should arrive at CIT next week.
• A draft of the test plan for the quad electronics and controls has been written.
• Modeling of the triple suspensions continues with inputs from Stefan. Initial indications are that the noise requirements for the RM and IMC triples should be relatively modest.

ELIGO OMC SUS

• All electronics for both sites are complete and ready for shipment.
• Wiring diagrams for the OMC SUS controls are 90% complete.

AdL CDS

• Visited Innovative Integration, a vendor of PCI and PCIe DSP and real-time solutions and talked to them about some of their low noise, high speed products. They agreed to lend us some of their modules for evaluation. One interesting item here is that they build shielded boxes for their PCIe modules, such that the module goes in the box, I/O on front panel, and PCIe link and 12VDC on back. The unit is approx. 7"x4"x2". The PCIe link can then be connected to a PCIe switch (see next item) and fiber optically connected to the host computers.
• Met with vendor for PCIe switches and PCIe expansion chassis (8 slot). These units can have copper and/or fiber link connections to one or more hosts. The host cards, expander and switches can handle up to 8 lanes (20Gbit/sec), full duplex. They also provide low latency (1usec or less) communications between computers connected to these switches as well. We should be able to get some units for testing by late January.

Seismic Isolation

From: Ken Mason kmason@ligo.mit.edu

BSC Seismic Isolation Assembly and Test

• The seismic isolation is operating and undergoing testing. Fabrice and Andy are at Stanford training on the ETF on how to control two stage isolation systems.

Single Stage Ham Seismic Isolation

• All Crates shipped from HPD have arrived safely at the sites and at Astropak. This includes the assembly stand, test stand , hardware, bellows, position sensors, and trim masses at LHO and GS-13 parts at LLO.
• The first set of large plates arrived clean at LLO from Astropak and are being put into the airbake oven.
• Stephany is detailing the fabricated parts for the installation tooling.

Suspensions

From: "Greenhalgh, RJS \(Justin\)" <J.Greenhalgh@rl.ac.uk>

•  No report.

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

• OMC SUS: Some parts already in clean/bake cycle. The structure rework is complete and structure will shortly be sent out for "brite" dip followed by clean/bake. Chris and Sam now have better estimate of revised mass of optical bench, which will allow design work to proceed for ensuring bench and upper mass hang at correct heights. I am continuing to analyse data and carry out modelling to draw conclusions concerning the shorting effect of the electronic cabling on the isolation.
• We look forward to having Calum Torrie with us at Caltech starting next week. He will be here through end January and will work mainly on the OMC and the RM.
• Schedule discussions continue. We now have revised (and hopefully fairly firm) schedule for the next big push at LASTI leading to installation of the ISI+quad into the BSC tank in late January. Process of setting up trips for LIGO staff to help at LASTI during the three week period from 14th Jan is ongoing.

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

• No report.

From: k mailand kmailand@ligo.caltech.edu

Adv. LIGO

• Assembly frame and shipping container for the mode cleaner optical bench, for carry on transportation to the site for Sam Waldman is in the CIT shop.
• I received an aluminum etch cleaning process sample and a Brite Dip process sample for Calum /Janeen re. welded aluminum structure cleaning, Bob Taylor is RGA testing it now.
• I have two samples from local water jet cutters 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: Liyuan Zhang <zhang_l@ligo.caltech.edu>

• After being carefully cleaned by Helena, the arrow side (side A) of the ELI Spetum window gives a better result, no evident wiping print was shown. With more zoom in, however, there is still some non uniform background, which is not removable and changeable by wiping and FC cleaning, indicating that it's probably due to something under the coating.
• The other side (side B) was also cleaned and measured, its result is better than that of the arrow side. A summary plot is here <http://www.ligo.caltech.edu/%7Elzhang/esw03/esw03_arr_2.pdf>.

Auxiliary Optics

From: Michael Smith smith@ligo.caltech.edu

ADLIGO

• IFO LAYOUT: The CP wedge has been set to 0.08 deg, and the ITM wedge to 0.32 for a combined wedge of 0.4 deg, for both the folded and non-folded IFOs. 
  Mike is still waiting for definitive numbers for the power and signal recycling cavity lengths to complete the layouts.
• SLC: Mike is in the process of creating drawings showing the locations of the ghost beams and beam dumps and baffles based on the new ZEMAX IFO layouts. These drawings will form the basis for re-calculating the scattered light noise and revising the SLC Conceptual Design doc.
• ARM CAVITY BAFFLE: Luke discussed a concept for constructing the tubing framwork that will support the arm cavity baffle glass. He will also develop a concept in which the baffle is constructed of porcelainized steel sheets instead of glass.
  Ken received samples of water-jet cuts of black glass from two potential vendors in the LA area, with elliptical holes, square holes, and small mounting holes. He is in the process of obtaining samples of porcelainized steel. 
• CHARGE MITIGATION: Gregg Harry will take over responsibility for the new AOS subsystem, Charge Mitigation.

Input Optics

• No report.

Other R&D

• No report.

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