Weekly Report for Week Ending February 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

Annonucements: There will be no LIGO Executive Committee for the NEXT TWO WEEKS:

Weekly Report Highlights

LSC Issues (Saulson)

Dave Reitze has been elected the next Spokesperson of the LSC. He was chosen from an outstanding list of candidates. We all wish Dave the very best in his new role, which will begin at the end of the March Collaboration meeting.

At its meeting on Thursday 15 Feb, the LSC Executive Committee approved three observational papers for publication: papers on the S4 untriggered burst search, on quasi-periodic oscillations in SGR 1806-20, and on the S4 stochastic search using LLO and ALLEGRO data.

 LIGO Laboratory Administration (Lindquist)

DOCUMENT CONTROL CENTER (Turner, Mak)

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

Update to Current Document Management System (Lindquist)

We are currently looking t three possibilities:

We are attempting to see if we can get accounts on working systems in organizations of similar size. We have distributed the results from the last attempt to evaluate these systems for review and as a starting point to see if some of the issues have been resolved.

FINANCIAL SYSTEMS (Funaro, Brambila, Kaufman)

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

>From: Florence Kaufman <fkaufman>

PROPOSALS and REPORTS (Lindquist)

A proposal for Continuing Operations (2009-2013) is due to the NSF this summer.  We met with the NSF this week to discuss what this proposal should contain.  I will be publishing a proposed outline and assignments based on the information provided.

CHANGE CONTROL/CONTINGENCY MANAGEMENT (Lindquist)

HUMAN RESOURCES (Akutagawa)

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

Quality/Safety ( Tyler )

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

Completed the safety audits of the Caltech campus facilities.  The 40M lab was the last to be audited, no significant safety issues were identified.  However, one safety concern was noted regarding the new bake-out oven. The door latching mechanism has no provision to unlatch the door from inside the oven.  Also, the 40M lab office area needs some extra house cleaning effort.

The consultant PO for safety support, should be in-place by next week.

The selection of members for the LIGO Safety Committee was completed and the committee members will be notified in a few days.  It is planned to have the initial meeting of this committee to discuss goals, objectives, LIGO and  Advanced LIGO need dates for safety related issues during the last week of February.

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

Summary of S5 Activities at LIGO Hanford Observatory (compiled by K. Kawabe)

Duty cycle (Thu Feb/8 to Wed Feb/14) of H1 was been 88.7 percent with 14 - 15.5 Mpc inspiral binary range. For H2 it was 87.7 percent with 6 - 7 Mpc range.

Summaries: Range and Duty Cycle update. Tuesday maintenance summary.

Highlights from the LHO elog are listed below:

Outreach:

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

S5 run (Igor Yakushin)

(Valera Frolov)

We continued the dark port beam characterization using the output  mode cleaner cavity:

(Rusyl Wooley)

CDS Computing (Lisa Bogue)

Advanced & Enhanced LIGO (Janeen Romie)

LLO Outreach (John Thacker)

Note: Friday, 2/09/07, was noteworthy in that we had our first school  group from out-of-state visit us. This was a group of HS physics  students (all had passed their  AP physics course; some had passed their AP Calculus course as well) from Little Rock, AR. This group  arrived at about 15:00 and departed at around 20:00 en route Baton  Rouge to spend the night.

LIGO computing and network security (Roddy)
-------------------------------------------------------------------- Reported under General Computing, see below.
General computing and LDAS admin (Giardina)
---------------------------------------------------------------------
Reported under General Computing, see belowReported 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)

Thermal Noise Interferometer (Black)

  • Greg continues to make progress on his spot-size measurement, and  Eric is at Hanford for a scimon shift.

LASTI (Ottaway)

ISI

HAM SAS

Pondermotive

  • Final alignment is nearing completion and the chamber should be ready for sealing up next week.

Test Cavity

  • The quad suspension was examined and new measurements of the wire break-off dimensions were recorded. The new mirror needed for the cavity was installed. The test layout for the HAM chamber has been completed and the injection bench has been installed. Both triple pendulums have been locked down awaiting re-deployment.

Infrastructure

  • The ceiling in the high bay sprung a leak due to the delightful snow/ice rain mix we had in Massachusetts yesterday. It may be necessary to shut the lab down for the weekend to ensure that any potential flooding due to the weekends thaw out does not cause a problem.

CIT Science Group (Weinstein)

Patrick Sutton

Coherent burst searches:

Other duties:

_______________

Kent Blackburn

TCLGLOBUS

  • Mary Lei and Michael Samidi are still working on ldasbox1 (64-  bit machine) instead of ldasbox4 (32-bit machine) for running   valgrind to investigate LDAS managerAPI coredumps using Globus   threaded libraries.
  • Resolved GSI authentication failure on Opteron systems. After   running strace and openssl from command line, it turned out   that the machine didn't have DOE certificates installed under   /etc/grid-security.
  • OpenSSL memory leaks within Globus Toolkit 4.0.3 has been   addressed in Bug #4743:   (http://bugzilla.globus.org/globus/show_bug.cgi?id=4743).  Downloaded GT4.0.x development branch from CVS repository and   they all use OpenSSL 0.9.7d dated on 17 Mar 2004 (old version containing memory leaks).

GRID APPLICATION DEVELOPMENT

  • In a few hours, 2nd OSG milestone will be completed: Running   LIGO workflow on OSG with 100 CPU slots continuously for one  week.
  • Discovered that Condor-G enable_grid_monitor variable is turned off by default (Condor 6.8.2) on osg-itb-se.ligo.caltech.edu. This  is the cause of high overload on ldas-grid gatekeeper when running  a large number of Globus jobs. Michael Samidi will use tclproxy  as a second submit host to test this variable.
  • Still working on SRM problem at UCSD with Karan Vahi. The problems  are submitting srmcp jobs using Condor-G fails and missing a single  quote surrounding SRM URL in the submit script.

OPEN SCIENCE GRID VALIDATION TESTBED:

  • Installed latest VTB:ce-1.6.1a release and tested.
  • Patched system for Daylight Saving Time change for 2007.
  • Attended VTB telecom related to outstanding issues of OSG 0.5.2

OPEN SCIENCE GRID INTEGRATION TESTBED

  • Tested pacman -update with OSG 0.5.2 pre-release. Reported PR  related to site_verify script and MonaLisa.
  • Worked with Michael Samidi and Kent Blackurn, successfully  completed OSG milestone of running 100 Inspiral HIPE jobs  continuously for one week as documented in MonaLisa.
  • Upgraded tclproxy as a submit host by installing Condor 6.8.4.  and OSG 0.4.1.
  • Patched system for Daylight Saving Time change for 2007.
  • Attended weekly DASWG,  ITB and Pegasus  telecoms.

OPEN SCIENCE GRID MANAGEMENT

  • Drafted presentation on "OSG Status and Accomplishments" for the  Joint Oversight Meeting next week in Washington, DC.
  • Provided data and networking slides for a second presentation at  the Joint Oversight Meeting next week.
  • Attended first OSG Executive Board Meeting of the year.
  • Submitted top level OSG policies and agreements document to  the OSG Executive Team and added to OSG DOCDB.
  • Work on job descriptions and postings at CERN and SPIRES for OSG positions at Caltech.

________________

Gregory Mendell

Laboratory Computing (Anderson)

LDAS Software (Maros)

LDAS System Administration (Anderson)

Caltech

(Dan Kozak)

(Phil Ehrens)

(Erik Espinoza)

MIT

(Fred Donovan)

Livingston

(Dwayne Giardina)

Hanford

(Greg Mendell)

(Ben Johnson)

General Computing (Wallace)

MIT

(Fred)

Livingston

(Dwayne)

(Shannon)

Hanford

(Christine)

Caltech

(Mike)

(Bruce Sears)

(Veronica)

(Christian)

(Larry)

Advanced LIGO and Supporting R&D (Shoemaker)

ELI (Adhikari/Zucker)
=====================
PSL: Rick and Annamaria circulated a draft optics BOM for upgrade of the PSL tables. Meeting
w/Benno to finalize facility requirements for AdL lasers is planned for March LSC meeting.

TCS: Tobin, Phil and Rana posted a revised TCS laser table layout
(http://lhocds.ligo-wa.caltech.edu:8000/mLIGO/Thermal_Compensation_System)

SEI: Both ISI and SAS programs had a good week, see respective AdL reports

ISC: OMC substrate design is now ready for circulation to prospective vendors, RFQ cycle expected to
begin next week. See Garilynn's report and this URL.
http://ilog.ligo-wa.caltech.edu:7285/advligo/Output_Mode_Cleaner.
Vendor has been selected and design finalized for the hermetic sealing of in-vacuum DC PD preamplifiers.

SUS: Welding issues on the OMC SUS structure are believed resolved. Production schedule predicts all components
in house around 4/1. See Janeen's AdL report. LOS EQ stop retrofit outsourced to vendor
for engineering and prototype fab. Initial vendor design submittal is under LIGO review.

VE/AOS: HAM6 septum layout on hold pending AdL output beam layout (in process). See this URL
http://ilog.ligo-wa.caltech.edu:7285/advligo/NextMeetingAgenda?action=AttachFile&do=get&target=G070025-00.pdf

G&A: RA/MZ request all those contemplating upgrades, retrofits or experiments associated with or
parasitic to the ELI vents (but not currently baselined) to please contact us now to discuss their
proposals

Advanced LIGO Systems

From: Hiroaki Yamamoto hiro@ligo.caltech.edu

Modeling and Simulation (Hiro Yamamoto)

e2e weekly meeting

Static IFO simulation (Hiro)

Modeler - e2e simulation engine (Hiro, Bruce, Melody)

Melody:

Bruce:

Mechanical Simulation for advanced LIGO (Sany and SLU team)

ALFI : e2e front end (Melody, Bruce)

Melody:

CDS Prestabilized Laser

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

The Beckhoff Automation control panel arrived.  Only four more components to go before we can actually do some software testing.  In the meanwhile I have been going through the pages (and pages) of documentation on TwinCAT.  It looks straightforward enough, only time will tell.  At least it's not a hard language to read.

I have been thinking of additions to the PSL safety plan and am currently drafting out a sample standard operating procedure (SOP).  I have subsequently found a pair of laser safety goggles that have the desired optical density at both 808 nm and 1064 nm plus a nice high transmission in the visible (75%).

Seismic Isolation

From: Ken Mason kmason@ligo.mit.edu

BSC Seismic Isolation Assembly and Test

Single Stage HAM Design

From: Brian Lantz <BLantz@stanford.edu>

SEI telecon notes for Friday, Feb 9 2007

Announcements

		- LLO outreach center on the cover of the Livingston phonebook  
HAM contract status

		- HPD is working on system installation and stage 0 deflection.
		- Design estimate cost is about 112% of original
		- Any news from PSI on the actuator feasibility not yet, Ken will ping them.
		- No complaints on schedule, yet.
Progress on the BSC
		- shims, trying to get system together, tooling works, but the tolerances are very tight. The tooling 
		  will have to be redone for Advanced LIGO. It will work for the full-load shims at LASTI, but it will 
		  not worth with full-load and less cross-coupling shims for at LASTI.
		- Laurent has a sketch posted of one solution, MZ also suggests a telescoping main screw.
		- stage 2 actuators in the wrong place, Calculations and redesign are done. Calculations by Laurent
		  and Ken Smith seem to be lining up. Calculations continue.
		- additional cap sensors? Cap sensors are ordered, should arrive on or before April 6. Rich M will 
		  check on the location of the testing units.
		- mock pod electronics: GS13/ L4C emulation board has been laid out, should be sent out next 
		   week for fabrication.
		- GS13 tester design should be sent out next week.
		- coil driver looks pretty much done, looks nice.
		- Mohana has started to look at the STS2 emulator board
		- control module probably good enough with +12 and gnd, since the neither of the two wires to the
		  motor are attached to anything else (like case ground).
		- real pods at LLO - locker code, clean assembly, STS-2s? Joe Hanson to look at better ways to
		  hold the gear to the motor. several suggestions made - bigger set screw, epoxy, off-center pin, 
		  keyed shaft. Brian O will confer with Joe H and decide. Epoxy is leading candidate right now.
		- Still working on getting together an assembly procedure for the pods.
		 - Brian L to send Joe an email about the 2 broken STS-2s.
		- Ben A. has info on locking modules in the ISI interface from Brian O & Shyang.
		- Joe G recommends that the locker/ unlocker should stay separate from interface board because it
		  would be less complicated. This will be the way it is done .Since there are 2 GS-13s controlle
		  from each ISI interface board, we will try to put 2 locker controllers per locker chassis. 
		- cleaning: Rob Luna got the shipping quote. Ken will write a description as a scientific instrument. 
		  Allen Sibley is in charge of the clean room
		- Aluminum in the BSC ISI:  many plates are made from 7075. one should not use 7075 in UHV.
		  Dennis has guess that it's only a problem at elevated temp so it might be OK with just a acid 
		  etch, and not a bake.
can we test a small part?
		- risk damaging an oven
		- asking John
		- alloy should make it not a problem
		- ALS, SLAC bans zinc
We should try to find someone with experience in a non-baked syste. Mike to call Fred Dylla at 
Jefferson Lab. Brian L to ask Dan D, and look for somebody at SLAC.
For advanced LIGO, we should replace most of the 7075 with 6000 series, because the parts are 
stiffness limited, not strength limited. 6000 series is just as stiff, more vacuum compatible, and cheaper.
For the LASTI prototype, we need to figure out how to clean the parts, because the high temp vacuum
bake is probably no good.
Seismometry and Corner station SPI

		-  20 hour run last week. Looked at the data from that to try to figure out what is important? 
		    Least squares model captures the drive pretty well. We had 3 temp probes working, the most 
		    important  term is a temp gradient. We would like to 1) have more temperature isolation, 2) temp
		    compensate the system 3) better design to minimize gradients will probably put in a pit to help 
		    with diagnostics
	- Also making a way to calibrate the pressure.

From: Dennis Coyne coyne@ligo.caltech.edu  HAM SAS

Yoichi, Ben, Virginio, Riccardo, Dennis, Alberto, Dave

Suspensions

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

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

*Enhanced/Advanced LIGO *

From: k mailand kmailand@ligo.caltech.edu

Adv. LIGO

From: Chris Echols cechols@ligo.caltech.edu

Advanced/Enhanced LIGO Output Mode Cleaner

D020482, REV A  UPPER MASS SCREW DRIVE SYSTEM   QTY: 4

D060491, REV A  MAIN SECTION, UPPER MASS, OMC           QTY: 1

D070020, REV A  MAGNET HOLDER, OMC                      QTY: 8

D070032, REV A  T-SECTION, UPPER MASS, OMC              QTY: 1

D070045, REV A  LOWER BLADE COVER, OMC                  QTY: 2

These are for the remaining parts required for the Output Mode Cleaner prototype Upper Mass stage.

Core Optics 

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

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

Auxiliary Optics

From: Michael Smith smith@ligo.caltech.edu

 OPTICAL LAYOUT

I revised the non-stable RC optical layout and the stable RC optical layout based on the criteria of achieving minimum wedge angles for the BS (1.66 deg) and the ITM (1.5 deg). Clearance of the BS PO mirror from the main beam determines the BS wedge, and clearance of the ITM ghost beam dump in the vicinity of the BS determines the ITM wedge. I gave a power-point presentation describing the layouts at the ADLIGO Systems meeting. The stable recycling cavity reduces the fabrication cost by approximately $140,000 per IFO.

From: Phil Willems <willems@ligo.caltech.edu>

TCS Noise on initial LIGO

Patrick Sutton and Cheryl Vorvick described in a Hanford elog on January 22 how glitches were observed in the PD1AC channels on TCS every 10 seconds, correlated with the updates to the polarizer orientations.  Patrick analyzed the effect of such glitches on AS_Q by statistically correlating the glitch rates between the two channels and concluded that TCS glitches were not influencing AS_Q at a significant rate.  More recently, Shantanu Desai used KleineWelle to conclude that about one large TCS glitch was getting into AS_Q per week.  Cheryl and I have been using the known coupling transfer function of TCS to AS_Q to determine how real TCS glitches would appear in AS_Q.  So far we think the typical TCS glitch in AS_Q has amplitude ~6e-18 m and has most of its bandwidth at 10 Hz, where it is buried in noise and not visible, supporting Patrick's conclusion.  However, occasional glitches of larger amplitude or higher frequency could get through and be seen. 

Cheryl and I suspect the cause of the glitch is vibration of the polarizer induced by step changes in its orientation.  We suspect this because the glitch always follows the orientation change by ~0.1s, and because 10 Hz is a plausible vibration frequency.  We also think this could cause visible glitches inEnhanced LIGO.  We propose that the problem can be significantly reduced by programming the rotation stage controller to slow down the step changes and make them less impulsive- currently they happen faster than we can resolve using a 16 Hz encoder data channel.

Absorption in LIGO Test Masses

Analysis of the TM acoustic frequency shift data collected by Sam Waldman and Valera Frolov suggests the following absorption levels in L1: 2 ppm in ITMX, 6 ppm in ITMY, 3 ppm in ETMX, and 3 ppm in ETMY.  Mike Landry and I have performed experiments at H2 to measure the absorption in the TMs there but have not yet analyzed the data.

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