The LIGO Executive Committee Agenda for Monday December 13, 2004 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items:
no report
STATUS OF LSC MOUs
(Petrac)
(LSC Research Plans through February 2005 and Progress Reports
through August 2004)
Cal State University of Dominguez Hills
EGO
GEO 600
Hobart & William Smith
Louisiana School of Math, Science, and Arts
Chinese National Academy of Sciences
University of Oregon
Penn State University
University of Rochester
Shanghai Institute of Optics and Fine Mechanics
Southern University and A&M College
Stanford University
University of Texas at Brownsville
University of Wisconsin
VIRGO
SITE TELECONFERENCE (Lindquist)
PROPERTY MANAGEMENT
(Chargois)
>From: Ed Chargois <chargois_e@ligo.caltech.edu>
DOCUMENT CONTROL CENTER
(Turner, Mak)
>From: Linda Turner - turner@ligo.caltech.edu>
>From: Cleveland Mak <mak_c@ligo.caltech.edu>
COST SCHEDULE CONTROL
SYSTEMS (Cunningham, Brambila, Kaufman, Salone)
>From: Esther Cunningham <esther@ligo.caltech.edu>
>From: "Brambila, Ruth"
<Ruth.Brambila@caltech.edu>
>From: Gina Salone <gsalone@ligo.caltech.edu>
>From: Florence Kaufman <fkaufman@ligo.caltech.edu>
SUBCONTRACTS MANAGEMENT
(Petrac, Jasnow)
>From: irena@ligo.caltech.edu (Irena Petrac)
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
SUPPORT (Baldon,
Kammerling, Lloyd)
>Irene Baldon
>Sharon Kammerling
>Dorothy Lloyd
PROPOSALS and REPORTS
(Lindquist)
Due date for submittal of FY 2007 - FY 2011 Operations Proposal has been
postponed. NSF is working with us to establish a suitable approach and
schedule.
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>
Nothing significant to report.
.
Summary of Commissioning Activities at
LIGO Hanford Observatory (compiled by L.Matone)
A lot of activities this week. On H1 there was a successful attemp to switch
control over to a REFL photodiode using the non-resonant sidebands. An effort
to pin-point which TM was absorbing heat was made and the OMC now locks using
the 2 omega signal. H2 goes into 'detect' mode but we are still recovering from
the LSC/ASC hardware and IOO changes. Details:
H1
H2
Livingston Outreach
---------------------------------------------------------------------
This week is the NSF review of the LIGO Science Education Outreach Program.
John, Bonnie and Jill Andrews (CIT Provost's special assistant for outreach)
have done a fantastic job pulling together presentations and logistics along
with our colleagues from SUBR, Exploratorium and the Board of Regents. Dinner
at Gino's was a gas.
L1 Commissioning
---------------------------------------------------------------------
Late last week the mode cleaner length was adjusted by relocating the HEPI
actuators on HAM2 and then fine-tuned to the exact frequency using HEPI
controls. Coincident with this change was an unexpected increase in
interferometer phase noise. This puzzling result is under investigation.
In the meantime we upgraded to the new Frequency Devices low-noise DAC's and
adapted the interface electronics and control software to make use of the
improved noise and dynamic range. These steps should bring DAC and coil drive
noise well below the SRD level.
This week we have worked on bringing up the laser power in stages to position
ourselves for an improvement in shot noise.
On HEPI, after a long time with no valve failures a failure seems to have been
triggered by the actuator repositioning during the HAM2 move. After replacing
the valve we did an autopsy and believe we may finally have caught particles of
the offending contaminant in the act. They have been collected for
analysis. Meanwhile new particulate screens are in production to try and
reduce the mobility of whatever it is.
General Computing (Roddy)
---------------------------------------------------------------------
Lost a disc on the support web server Tuesday night. I will not be able
to repair this until I return from vacation. It is not critical at this
point though. Reinstalled a Linux workstation for Andri. Working with Mathworks
on a x86_64 problem. Matlab segfaults on SuSE 9.2 in 64 bit mode.
If you force it to run in 32 bit mode on the command line via -glnx86 it will
run fine, but in 32 bit. Working with our local Sun rep on a couple of issues
that have been ongoing for a while. Also, working with him on solutions
for authentication. Found out about a vendor who makes routers that compete with
Cisco. This may be a possible solution to replace our CPU limited router
currently installed. These folks claim wire-speed with multiple OC3s, so
it may outperform Cisco. Also, they are open source. I need to
investigate this further after the 1st. Configuring the GigE switches for
CDS. I am about half way finished with these and expect to be able to
hand them off to Rusyl tonight. Replaced our DNS server late last week.
Also installed an internal DNS that is slaved off of it. This should help
in a couple of ways: 1) the old DNS was Solaris 8 and difficult to
maintain. 2) this should split the load between the two servers, one for
internal hosts, one for DMZ hosts. Received the UPS for the 3rd GC rack.
Turns out it was damaged when it got here. After working with the vendor
(CDW-G) they immediately sent out a replacement. The replacement got here
this week, and it also was damaged. The damage on the replacement does
not look severe enough to warrant sending the UPS back though. It appears
easily repairable, however now I will not have enough time to install it before
I leave for vacation. I would have liked to have installed it and allow
the batteries to charge and let the unit "burn in" while I was out of
town.
LDAS/Condor Sysadmin and Burst Analysis (Yakushin)
---------------------------------------------------------------------
Condor/LDAS admin:
1) ldas-grid.ligo-la.caltech.edu had a failed disk. Installed two new 200Gb
disks and reinstalled RH9, LSC data server. Condor is up and running again.
2) Received tape cabinet.
Data analysis:
1) Perfecting GWDAW-9 presentation. Attending burst review telecons. Gave a
rehearsal presentation at all-LSC telecon.
2) Still looking at waveburst performance on the data simulated by Shourov.
see also the CDS weekly meeting minutes in the commissioning archives:
Rolf Bork reporting
- Completed requested changes to Hepi (allows input of LSC
signals and appropriate matrixing and filtering). This change will be installed
at LLO either today or early next week. This also required changes to LSC and
MC2 LOS controller software to route signals to Hepi.
- Changed front end DAQ software to increase number of
channels per front end from 128 to 160 (Hepi required more channels).
- Received three of the new 2.2GHz VME CPUs w/3 PMC slots.
Two were sent to LHO and one remains here for code developement/testing. The
LSC and end station controller software has been ported to Linux to run on
these new processors.
Jay Heefner reporting
Fiber Optic Timing Link (Sander)
============================
- Transmitter and receiver board schematics and pcb layouts
sent out for review by group. Comments being sent to Sander.
- Fanout layout is complete and will be sent out for review.
Timing System Redesign
============================
- No action
Anti-Image Boards for Low Noise DACs (Todd)
====================================
- 7 more will be in test by the end of the week.
- Front panels received.
40 Meter (Ben/Jay)
=================================
- The ISS is working. There seems to be a slow offset drift
in the stages after the AC coupling. The cabling to the box needs to be
re-routed to its final location. The ribbon cable needs to be replaced with a
shielded rolled ribbon.
- The alarm and severity fields for the suspension records
have been updated. When the aux crates are rebooted they will take affect. We
will then test the alarm handler. Once it is debugged we will incorporate the
changes for the other systems.
- The satellite amp for MC1 that appeared to have failed
last week has been reinstalled and is working. The problem may be with an
intermittent connection on the 64 pin ribbon to the module. We will keep an eye
on it and rework the cable if necessary.
LSC PD Redesign (Ben)
====================================
1)The enclosures should be back from Front Panel Express on
the 14th.
2)This first board of this run is currently being
characterized, everything looks fine so far, but some of the measurements still
remain to be completed. Ben is trying to measure the transimpedance accurately.
3) Nine other boards are being stuffed by Todd, and should
be finished by the end of this week ready for testing.
4) Sixteen boards are going out to Screaming Circuits
tomorrow.
5) All the generic parts, and long lead parts are now here
to stuff the boards that we have.
6) Internal cables are being fabricated by Dave, and should
be available when the boxes arrive.
7) 3 old PDs are available to be sent to LHO as immediate
spares if necessary.
ISS (Flavio)
==================================
- Working with LHO on possible changes. There was a meeting
last Wed. where a list of things to do was agreed upon.
EMI Upgrade
================================
- Meeting tomorrow at 9:00 to discuss LHO plan.
AdL SEI (Jay)
===================================
- Calibration blocks for the capacitive probes have been
ordered.
AdL SUS (Jay)
===============================
- We need to upgrade the CIT test stand to handle a quad by
late Jan. Most if not all of the parts are on hand.
TCS Chiller (Mohana)
=================================
- Sent one box to LHO. More are being stuffed.
- 10 boxes have been ordered. Panels are in hand.
TNI (Jay)
=================================
- No action
Elect Shop (Todd)
===================================
- Fabbing 4 pin LEMO cables for LHO.
Rich Abbott reporting:
1. Working on converging the remaining issues
associated with the ISS delivery to LHO. Flavio, Paul, Rick and I are
meeting today to discuss remaining issues. Most action items are now
complete.
2. Started planning for week at LLO (13 Dec.).
Did some modelling to expose possible causes of observed AD620 oscillations
into RF feedthroughs. Was able to recreate the 450 kHz oscillation
observed by Stefan Balmer and explored options for a cure.
3. Helping characterize the new RFPD with Ben.
4. Participating in planning for RFI retrofit at LHO
no report
PeterKing
There have been some problems getting the frequency servo up
and running, as the error point does not appear stable and occassionally the loop
oscillates. Problems with engaging the servo were traced down to a loose
ground connection in the wiring harness, which in turn was a remnant from
testing of Rev. C. of the intensity stabilisation servo.
Lee Cardenas, Liyuan Zhang
OTF Lab. (W. Bridge)
The chamber has two samples, white Ceramabond, and disks of TRA-BOND #2254
color light brown epoxy. Cavity still locked.
We have completed the test and we'll stop it later on in order to refurbish the
vacuum pump(change new oil) and make new test.
Absorption Test Measurement prototype -- in standby
Scatterometer system -- in progress
The Inner test mass 2ITM04 fused silica mirror is in the scatterometer
enclosure. We have had the End
Test Mass 2ITM04 cleaned with C02 gas and the scanning has been completed, data
evaluation is in progress.
We have started a new scattering test for a1.00" inch contamination cavity
mirror, after cleaning of the mirror being completed.
The fabrication of a mount to hold END TEST MASS BLANK
(40 meter) of ~ 4.92" in diameter is on waiting.
The Quantronix 60 watt laser -- No Change
OTF Lab at Lauritsen ROOM 38
Cavity #3
The contamination test for (6) disks of VAC SEAL Epoxy samples is in progress.
Cavity locked again and we'll be taking measurements after improving laser
power output (better alignment is necessary)
Cavity #2 -- in standby
no report
no report
--------------------------------
Simulation and Modeling (Bhawal)
--------------------------------
Commissioning support
---------------------------
(Matt) Continued work on TDS commissioning software tools. Also modeled a
modification to the 25 MHz RFPD which has much greater 2nd harmonic rejection.
(Biplab) Calculated Optical Gains for all Length Sensing signals for LLO
interferometer using the FFT code. Plots for Gains as functions of heating and
SPOB power are available at
http://www.ligo.caltech.edu/~bbhawal/ForRana/
The gain for L- signal at dark port is proportional to (SPOB power)^0.86.
Simulation of 40m interferometer
---------------------------------------
(Monica) A new comparison between Twiddle and e2e has been done, i.e. the
transfer function from L- dof to the asymmetric port demodulated at 166 MHz. To
get faster jobs, some channels will be removed from the 40m package.
Modeler
-----------------------
(Melody) Working on speeding up the dynamic link process used in the FUNC_X
primitives. Currently looking at compile options for an increase in speed when
loading the shared library.
Alfi
--------------------
(Bruce)
- Bundler generated connections are being moved completely into the
local nodes. Completing connections based on inherited completions did not work
correctly.
- Fixed problem with port renames which are not being propogated to
derived nodes properly.
---------------------------------
LDAS Software Systems (Blackburn)
---------------------------------
LDAS:
Closed out PR 2719, db2utils rsc no longer needs to be updated for default
database change, and PR 2747, removed variable ::dbname from metaDataAPI's
resource file. Working continues on PR 2617, missing headers for tables in the
controlMonitorAPI's client.
Work continues to add support for accessing metadata from the FrProcData
Structures within frame data for the frameAPI.
Began migration to Fedora Core 3 on a laptop. Successfully build LDCG on this
environment, but haven't used it to build LDAS yet. Also making a few changes
to the SINSTALL rule set to recognize the differences in the available RPMs for
Fedora Core 3 vs REDHAT 9.
Updated gdb, GNATS for LDAS use along with the SINSTALL rules and webpages.
Removed a redundant webpage describing CVS for LDAS (PR 2748). Installed new
webpage outlining LDCG per PR 2695.
Ran the LDAS integration and system tests on LDAS version 1.2.15 from the
development source code tree. All test scripts use the LJrun package that is
part of LDAS instead of from ligotools. This will allow modifications in the
future to support certificates for authentication. New tests have been added
for GEO frames. An issue with testing against the GEO frames has been
discovered and reported to the frameAPI developer. No issues were found with
older integration and system tests.
Tcl/Globus:
The Tcl/Globus website at http://tclglobus.ligo.caltech.edu has been
redesigned. More work is needed, but the new website captures much of the
infrastructure needed to support nightly builds and source code documentation
that was missing from previous website.
Completed the Tcl test example to exercise the blocking client/server use case
based on XIO library from Globus.
Investigating how to use GSI on top of XIO by calling the following four
functions: globus_xio_attr_cntl, globus_xio_server_cntl,
globus_xio_data_descriptor_cntl, globus_xio_handle_cntl.
Still have four remaining XIO wrapped functions untested at Tcl level.
Researched on how to use myproxy server for TCL globus testing for automatic
renewal of certificate credentials. Installed a myproxy server. In order to run
the myproxy server - need a host certificate for my machine. Tried installing a
SimpleCA on workstation to create its own host certificates. There's some
problem installing it on workstation so posted problem on globus discuss
mailing list.
Started research on how to integrate LDAS code with TCL globus to use
certificate based authentication. Currently studying the controlMonitorAPI and
its security requirements.
GRIDs:
Looked into the RLS crash here at Caltech. Essentially the current version of
RLS in the LDG package is 2.1.5 and there have been substantial improvements in
stability in RLS 2.2 because it uses Globus XIO. Made suggestion to upgrade to
RLS 2.2 and some changes in the way the RLS is run and its configuration
especially the mysql.cnf file.
Attended a face to face meeting at ISI to discuss the final year of the joint
GriPhyN LIGO activities. We will be putting together a mini-boot- camp in late
January to go over Pegasis, running inspiral and possibly stochastic jobs via
Pegasis on the GRID. We will also go over using the GRID3 grid at this
bootcamp.
-------------------------------------
LDAS System Administration (Anderson)
-------------------------------------
Caltech
-------
(Dan Kozak)
* Moved the ACSLS machine to the private private (admin) network behind
dataserver-cit.
* Extracted all of CACR's 9840 tapes from our silo and put them into their
silo.
* Finished moving all data off of SAM tapes in 9940A and/or 16k formats and
relabeled the tapes in 9940B format. We now have approximately 148Tb of
free tape space labeled and usable in our silo. This does not include the
old LIGO HPSS tapes (~1000 tapes).
* Published E11 L3 data to CIT cluster.
(Stuart Anderson)
* Received 80 new cluster nodes and started installing them with much help.
* Benchmarked the new cluster switch and found it to be 50% faster.
* Tested NFS mounting the SAM-QFS filesystem directly onto the cluster. There
are still some open performances issues to be resolved.
MIT
---
(Keith Bayer)
* Dealt with leak in condensation tank.
* Replaced power strip that repeatedly tripped circuit.
* Copied system files and data onto newly installed 200GB harddrive in
cluster. Fixed mount points so 2nd drives are now operational.
* Added users.
Livingston
----------
(Igor Yakushin)
* ldas-grid.ligo-la.caltech.edu had a failed disk. Installed two new 200Gb
disks and reinstalled RH9, LSC data server. Condor is up and running again.
* Received tape cabinet.
Hanford
-------
(Ben Johnson)
* The L700 robot arm has been repaired; the hand was replaced. It has operated
for two days without losing grip on any tapes.
* Both observatoriesare now running the updated D2D scripts. They are now
calculating and logging Frame checksums and md5sums.
* Repaired bad disk in old IDE RAID (defiance).
* ldas-grid and ldas-gridmon now part of daily backups at LHO.
* /samraw and /samrds have been merged into /archive, freeing up 16 T3 disk
arrays.
* Now copying and publishing postS3 data on the cluster. Everything from
September 20 to present has been copied/published (scripts still running to
catch any new files).
* Continuing to work on publishing scripts/classes.
-----------------------------------
Data Analysis Activities (Anderson)
-----------------------------------
(Igor Yakushin)
1) Perfecting GWDAW-9 presentation. Attending burst review telecons. Gave a
rehearsal presentation at all-LSC telecon.
2) Still looking at waveburst performance on the data simulated by Shourov.
(Peter Shawhan)
* Spent much of the week on the talks being prepared for GWDAW: reading,
reviewing, listening to them, and sending comments/suggestions to the speakers.
* Finished a study of the statistical issues involved in allowing a post-hoc
veto in an analysis, with a Matlab simulation and results posted at
http://www.lsc-group.phys.uwm.edu/cgi-bin/bag-enote.pl?nb=burs2news&page=26
.
* Re-generated the index files at Hanford that allow DTT to access data in the
archive there, now that the /samraw and /samrds filesystems have been replaced
by /archive.
(Patrick Sutton)
It's been another week devoted to review of the LIGO-TAMA bursts
analysis. I've resolved the remaining major issue pointed out by
Katsavounidis (the apparent discrepancy in background rates estimated via time
lags vs Poisson statistics). I also drafted the LIGO-TAMA talk for GWDAW,
with help on plots from Laura Cadonati. The talk has been approved by the
review committee and by the executive committee, so once I get the nod from
TAMA I'll be good to go. (I sent the draft to TAMA on Dec 6).
---------------------------
General Computing (Wallace)
---------------------------
MIT:
(Keith)
-Handled a minor security incident.
-Monitoring new wireless router
-Spec'd out new laptop for professor
-Dealt with compromised pc machine
-Looking into new CAD pc for lab
Livingston:
(Shannon)
-Lost a disc on the support web server Tuesday night. I will not be able
to repair this until I return from vacation. It is not critical at this
point though.
-Reinstalled a Linux workstation for Andri.
-Working with Mathworks on a x86_64 problem. Matlab segfaults on SuSE 9.2
in 64 bit mode. If you force it to run in 32 bit mode on the command line
via -glnx86 it will run fine, but in 32 bit. Working with our local Sun rep on
a couple of issues that have been ongoing for a while. Also, working with
him on solutions for authentication.
-Found out about a vendor who makes routers that compete with Cisco. This may
be a possible solution to replace our CPU limited router currently
installed. These folks claim wire-speed with multiple OC3s, so it may
outperform Cisco. Also, they are open source. I need to investigate
this further after the 1st.
-Configuring the GigE switches for CDS. I am about half way finished with
these and expectto be able to hand them off to Rusyl tonight.
-Replaced our DNS server late last week. Also installed an internal DNS
that is slaved off of it. This should help in a couple of ways: 1)
the old DNS was Solaris 8 and difficult to maintain. 2) this should split
the load between the two servers, one for internal hosts, one for DMZ hosts.
Received the UPS for the 3rd GC rack. Turns out it was damaged when it
got here. After working with the vendor (CDW-G) they immediately sent out
a replacement. The replacement got here this week, and it also was
damaged. The damage on the replacement does not look severe enough to
warrant sending the UPS back though. It appears easily repairable,
however now I will not have enough time to install it before I leave for
vacation. I would have liked to have installed it and allow the batteries
to charge and let the unit "burn in" while I was out of town.
Hanford:
(Christine)
- Network usage can be seen at
http://www.ligo-wa.caltech.edu/~christin/mrtg/198.129.208.1_198.129.78.122.html
- Researched how to turn off the autologout feature in tcsh. When using
SSH tunneling for e-mail, it is inconvenient to have the shell log you out
after 60 minutes. Modifying the .tcshrc will turn off the autologout.
- Moved some new PC software into our standardsys area for users to install on
their computers. Mostly it was upgrades to the standard software.
- helped a user get SSh working from his home computer so he could securely
check his work e-mail and work from home.
- Worked with Richard and Ben to determine best path to get LDAS grid computer
on the GC GigE backbone. There may already be some spare fiber we can
use, Richard is looking in to it.
- There is an unknown ip address broadcasting on the GC network. It looks
like someone has a network card setup for their home ISP router and didn't
disable itwhen they came to work.
- Swapped an old Sun Ultra 30 for a new SunBlade 1500 for use in the Control
Room.
- Mounted a new LDAS file system to several GC sun computers.
- Misc. other user support.
CIT:
(Veronica)
- LSC website: Updates/ papers for review/ presentations from the last
meeting.
- LIGO: Went through the security audit procedures for Win servers with
Mike. Updates to the website. Updates to meetings/ roster
databases. Working on a website for the Aspen'05 meeting.
- CaJAGWR/ TAPIR: Taped and compressed the video of the last talk. Tested
video setup for the Keck Foundation presentation.
(Mike)
-Helping Larry monitor the mail services, going through the spam filters,
checking for false positives.
-Worked on the Wireless Access Points, updating AP MAC Address list. This was
to grant additional users wireless access. Came across a problem with AP's on
the 3rd floor of W/B, I ended up having to manually reboot all AP's through out
the project.
-Worked on the NTSRV's, showing Veronica how to maintain the security and keep
up on the patch levels, also troubleshooting system errors, etc.
-Setup an additional project on the PDMWORKS server, and also added certain
users to this group/project.
-Reload my sys adminlaptop due to OS issues. I'm still working on this project.
-Miscellaneous onsite/phone user support.
(Bruce)
* (BS) Ilog Development:
- Fixed search engine bug and
redistributed Ilog to all sites.
(Larry)
-Assisted the 40M group recover from a power outage they had Friday evening.
There have been a few items that needed some attention throughout the week but
most of the issues have been resolved. Jay is working on getting a UPS setup
for the computer systems to where they won't be affected by minor power
glitches.
-Resolved a couple of server issues for the E2E group. They still have one
server that needs to be rebuilt. The quad CPU unit has had a few modifications
made but I still want to add some more disk space to the system.
-Working on a DNS modification for the LSC. They want to be able to point the
ligo.org to another system not in our domain and I am still waiting for some
answers from the CIT people.
-Trying to work out afew items on the network. We are going to narrow down the
GC locations able to access the data archives provided by LDAS. The first tests
using multiple VLANS did not work out as planned but we plan on doing a few
other things while we finda resolution to that problem.
-Worked a number of user account issues. We are still locking up old accounts
and will be cleaning them off during the next few weeks.
-Assisted various users with different application problems. Most dealt with
configuration or path issues. The SDRC issue was resolved but I am still
looking into why the problem occurred.
-Worked a number of e-mail issues.
Mail stats for Dec. 02, 04 - Dec. 08, 04
Accepted Messages 11,393
False Positives 113
Virus
Total Rejected 12,635
Total Messages 24,028
Dennis Coyne
See also the AL Systems web
page
Our UK partners
proposed to send PPARC/project funds to the US for purchase of COC substrates
(to leverage on the larger purchase order to be placed by the LIGO Lab). This
proposal raises a number of questions about ownership of the COC elements
purchased by the
Records Of
Decision or Agreement (RODA)
See also the RODA
status web page
In the last week:
·
Posted M040279-03, "Design work at RAL in parallel with the quad controls
prototype development"
·
Commented on draft RODA to establish the size of the Power and Signal Recycling
Mirrors
·
Calum Torrie has taken an action to revise RODA M040283-01, Sapphire and Fused
Silica Baseline Optic sizes, to include Penultimate Sizes and the flats for
ears.
·
Obtained agreement to change from the original plan to pursue R&D on
ribbons and dumbbell fibers in parallel to a plan of R&D on fibers first,
and then only if needed, dumbbell fibers. Documented in a memo by Helena
Armandula.
Requirements
·
Established a Ultra-High
Vacuum (UHV) requirements, guidance and status web page
·
Proposed the development of a large, hot, uniform temperature vacuum bake oven
to the Vacuum Review Board (VRB) and the Configuration Control Board (CCB).
Details can be found on the above cited web page. A meeting for further
discussion with the VRB will be held Thu 12/16,
·
Started analysis to establish the BS dimensions (current baseline is 350 mm
dia. x 60 mm thick, 1.3 degree wedge)
Interface Issues
·
Established the SUS BSC lift load capacity (1958#) and gave guidelines on the
access and clearance available for SUS installation tooling for the BSC
chambers
·
Held a meeting to address a number of SUS interface issues. For details see the
"working notes" on the "interface control" web page, which
can be found on the main AL Systems web
page .
·
Requested the LIGO ITS/general-computing group to establish a PDMWorks vault
for use in collaborating on integrated layouts (AutoCad and SolidWorks)
From: Larry Jones
<ljones@ligo.caltech.edu>
Advanced LIGO Seismic Structure
SEI Structure:
ASI has reviewed our proposed cost and fee numbers for the contract
revision, and has agreed with them.
The design effort at ASI has started again, with Richard Fleischner and two
other designers working nearly full time.
Actuators:
Nothing new.
Displacement Sensors:
Nothing new.
Seismometers:
Five spare STS-2 cables were shipped to Giaime at LLO for storage.
Galling/Dusting Test:
A draft of the report covering this task has been completed and is being
reviewed.
From: Janeen Romie <romie_j@ligo.caltech.edu>
nced LIGO
Working on the tablecloth design. Ordering parts for the quad prototype.
Ran Algor analysis of upper structure.
Caroline Cantley and Justin Greenhalgh were here last week and much was
accomplished. While working in the lab last week, we assembled a rudimentary
quadruple pendulum suspension.
I have a meeting with Thomas this morning to confirm the changes he's making in
the ribbon/fiber/ear section of suspensions in Primavera. Caroline and Helena
met with Thomas, Carol and I to firm up the details for preliminary and final
design for these sections.
Participated in a quad interface issues meeting last friday with Dennis that
was very helpful in validating and providing clarification on a number of
issues.
Participated in a quad installation fixtures meeting after the SUS meeting on
Tuesday. Worked on clarifying the fixtures requirements that Oddvar specifies
in his document E040473.
Gin Gin
Trying to sort out continued customs problems.
From: Helena Armandula <ahelena@ligo.caltech.edu>
Advanced LIGO Coatings
Working with GariLynn analyzing scatter patterns on coated 40 m optics
Advanced LIGO SUS
Looking into materials used on OSEM's to assess their outgassing under vacuum.
From: Michael Smith <smith@ligo.caltech.edu>
STRAY LIGHT CONTROL
Mike
From: Riccardo DeSalvo
<desalvo@ligo.caltech.edu>
Juri
In Pisa. His pre-thesis report available in
ligo.caltech.edu/~desalvo/pretesiAgrestiT0400225.pdf
Marco (30 Nov)
Working on the new PTZs driver circuit.
Operated the interferometer with coarse power feedback on TEM 00 and other
excited modes
Creep experiment:
Now at 400C it is suffering from rapid external temperature variations due to
work in the Synchro. Will need longer times to measure the position
reliably.
Riccardo, Gianni Gennaro
Finished s the first design (assemblies only) of the seismic attenuation
platform for the Output Mode Cleaner. Now proceeding with component tests
and detailed drafting.
Barbara
The final version of her thesis (minus the appendices) available in
ligo.caltech.edu/~desalvo/ BarbaraTHESIS.pdf
For additional information about this report, contact whitcomb_s@ligo.caltech.edu