The LIGO Executive Committee for January 24, 2005 is cancelled because of the Staffing Committee meeting.
no report
STATUS
OF LSC MOUs (Petrac)
(Weekly update on the status of
LSC MOUs and Research Plans and Progress Reports
through February 15, 2005)
Cal State University of Dominguez Hills
GEO 600
EGO
Shanghai Institute of
Optics and Fine Mechanics (SIOM)
VIRGO
Other
SITE
TELECONFERENCE (Lindquist)
A brief site teleconference was
held on Thursday, January 20, 2005. The following items were among those
discussed:
PROPERTY
MANAGEMENT (Chargois)
>From: Ed Chargois
<chargois_e@ligo.caltech.edu>
>From: Linda Turner -
turner@ligo.caltech.edu>
No report.
>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>
No report.
>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
>Dorothy Lloyd
PROPOSALS
and REPORTS (Lindquist)
Nothing new to report
DCC Steering
Committee (Lindquist)
We have contacted proposed members of a steering
committee to schedule a meeting next week. The purpose of the committee
will be to prepare a recommendation as to how the
CHANGE
CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
HUMAN
RESOURCES (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Quality/Safety
(
>From: Bill Tyler
<tyler@ligo.caltech.edu>
Nothing significant to report this week.
Summary of Commissioning Activities at
LIGO
Displacement noise on the 2k now rivals that on the 4k, yielding an extremely
stable binary inspiral range of 3.5Mpc.
Important contributions to this improvement were the correction of a completely
wrong cable connection into the RF distribution (a configuration which had
produced combs of artifacts), more laser input power and working photodiodes
(bulleted below).
Additional commisioning highlights from the past week
are briefly described:
4K IFO
2K IFO
DAQ
L1 Commissioning (
---------------------------------------------------------------------
This was another up and down
week for the interferometer locking. We had a long stretch of
<a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/16/2005&anchor_to_scroll_to=2005:01:16:14:37:
02-harryo"> stable locking
</a> with one 9 hour lock.
But continuing problems with
electronics and DAQ system prevented us from locking most of the week. The
interferometer work was mostly focused on getting the angular control to work
with thermal compensation system to improve the stability and sensitivity.
Some highlights of the
interferometer commissioning activities:
- the
RM/BS DAC was producing the angular instability and was <a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/15/2005&anchor_to_scroll_to=2005:01:15:05:40:
34-rana"> replaced
</a>
- the
WFS sensing matrix was measured in <a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/15/2005&anchor_to_scroll_to=2005:01:16:17:10:
56-rana"> cold </a>
and
<a href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/17/2005&anchor_to_scroll_to=2005:01:17:01:45:
36-mevans"> hot
</a> states, and inverted to enable the high gain WFS with ugfs of 1-3Hz.
- the
new interferometer readout channel was introduced - <a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/17/2005&anchor_to_scroll_to=2005:01:17:02:38:
54-rana"> DARMA
</a>. This channel is taken after the dynamic matrix in the control loop.
- most
of the <a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/14/2005&anchor_to_scroll_to=2005:01:14:12:17:
18-DougL"> PEM </a>
sensors are operational
- new
coil balancing technique for <a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/13/2005&anchor_to_scroll_to=2005:01:14:03:07:
51-rana"> RM, BS,MMT3 </a> was proposed.
- the
problem with MC1 optic angular shift was finally narowed
down to a cable which was not plugged in all the way.
- the
MC WFS demod boards were checked in the elab. High voltage cables repaired. The MC WFS is now back on. It is still not clear if the problem was in the demod epics controls or may still be with us.
- noisy
dewite board and ETMY optical lever electronics were
<a
href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/17/2005&anchor_to_scroll_to=2005:01:18:01:47:
59-rana"> identified
</a>.
- the
<a href="http://www.ligo-la.caltech.edu/ilog/pub/ilog.cgi?group=
detector&date_to_view=01/18/2005&anchor_to_scroll_to=2005:01:19:02:07:
31-mevans"> data
corruption </a> problem required reconfiguring the small optic front end
code and multiple front end and Frame Builder reboots. The rate of data
corruption is reduced from one check sum per minute to one per hour. It allows
us to continue but more debugging is needed.
CDS software (Khan)
---------------------------------------------------------------------
1) Worked with Alex on
different CDS related problems, including configuring the frame builders,
debugging the CRC checksum error on the data transfer, installing high speed
DAQ system. AWG setup and GPS installation.
2) Perform general maintanence of CDS controllers.
---------------------------------------------------------------------
Conducted two tours
identified color schemes for Exploratorium exhibits
Set up exhibit production
space in warehouse
Safety and Security (Riesen)
---------------------------------------------------------------------
Nothing to report
L1 and AdL
Mechanical Engineering (Spjeld)
---------------------------------------------------------------------
Oddvar is on travel at Caltech this week attending the ASI
closeout and working with Dennis, Larry Jones and Ken Mason on taking over some
AdLIGO engineering scope.
General Computing (Roddy)
---------------------------------------------------------------------
Working on
an agenda & notes for the security meeting.
Working on
translating the Cisco ACLs to Linux iptables rules.
I might be able to script this???
Getting
pricing for a rack mount Linux PC to act as our router to replace the Cisco
router. Assuming that
further testing goes well, I will purchase one of these and possibly a spare
depending on price. If I can get the proper device support from Solsoft to support both the Linux and Cisco router, a back
up solution could be put in place within ~1 hour if the router failed. An
automatic failover solution would be much more expensive .
Helping
Igor with a T3 disk issue.
Replaced a
failed power supply in a workstation.
Going
through the syslogs and security notices this week.
High Power Laser Facility,
Optics Modeling and L1 Commissioning
(Franzen)
---------------------------------------------------------------------
1) Have been monitoring the
ongoing high power endurance test of the RTP crystal. So far
so good. However, the laser power has slowly been decaying during the
last couple of days by more than 5%. We are worried and have contaced the IPG people for some advice on this.
2) Writing a short note on
the results from the Melody AdvLIGO mode cleaner
model together with Amber Lynn Bullington and Ray Beausoleil.
LDAS/Condor Sysadmin and Burst Analysis (Yakushin)
---------------------------------------------------------------------
1) badblocks failed on the new drive on node26. Ordered 10 more spare drives. All the other drives seems to be OK.
2) having
trouble with one of the new T3 units: cannot log into it.
3) 1% dataflow is restored.
from Dennis
Coyne
see also the CDS weekly meeting minutes in the commissioning archives:
no report
Rich
Abbott reporting
Trip
summary (LHO) for week of 10 January 2005:
Planning next trip to LLO in early February.
Setting up team for initial developments on new documentation
system.
====================================
-
-
Paul is fabbing the chassis.
-
Sander is writing the test procedures.
-
Need 4 pin lemos. They are due by the end of the
month.
=====================================
-
7 more complete and ready to ship.
=====================================
Ben
went to
Some
minor adjustments were needed that only became evident after the high-power
testing. The summing weight resistor needs to be changed in order to
better adjust the feed-forward loop weight.
There
are more units here that are mostly stuffed, but need tuning, testing and
assembling into their boxes. These will be done and shipped when Todd can
fit them in the queue.
=====================================
-
Flavio at LHO
-
2 boards being fab'd. Dave doing box assembly
====================================
-
Units shipped.
no report
PeterKing
The
qwerks of the high voltage amplifier reported last
week I think are due to the
inductance in the leads of the capacitive load I used as a dummy. Otherwise
when compensated for maximum gain flatness, the small-signal 3-dB bandwidth is
about 9 MHz with a unity gain frequency of 67 MHz.
The
layout for a small battery powered single-ended to differential/differential to
single-ended board was completed.
Ken
Mailand
The
LHO Chillers are being plumbed in this week, and Phil Willems
is at the site. The Chiller at the site has been running now for two months
with a mixture of glycol and water, showing some corrosion on the internal
parts.
That
system has been flushed and the recommended Dex-fluid
mixture has been substituted. The overnight indications are excellent
performance has been maintained with a small increase in flow rate to 1.3 gpm.
Lee
Cardenas, Liyuan Zhang
OTF
Lab. (W. Bridge)
This chamber has two samples, white Ceramabond,
and disks of TRA-BOND #2254
color light brown epoxy. Cavity still locked.
We are going to shut this cavity down due to the repair of the A/C unit in the
hallway.
Absorption Test Measurement prototype in standby
Scatterometer system in
progress
The Inner test mass 2ITM04 fused silica mirror is in the scatterometer enclosure.
The fabrication of a mount to hold END TEST MASS BLANK
(40 meter) of ~ 4.92" in dia. by 53mm in
thickness still in progress
The Quantronix 60 watt laser has
been recovered
Alignment and optical train set-up still in progress.
OTF Lab at Lauritsen ROOM 38
Cavity #3
The contamination test for (6) new disks of VAC SEAL Epoxy samples
is in progress. Cavity is locked and we are taking measurements for absorption
and ring down for contamination loss every day.
No change in measurements, good indication that the samples are
"clean"
Cavity #2 in standby
This cavity will be recovered ASAP due to shut down at Bridge.
As mentioned before, all the components required are gathered.
Misc.. tasks, machining of
the scatterometer head holder has been completed.
some fixing in the labs to comply with safety
inspection is undergoing.
no report
no report
Simulation and Modeling
(Bhawal)
Weekly E2E meeting
-----------------------
We had discussion on the
level of longitudinal and angular motion for mirrors in the Mode Cleaner and in
Mode-Matching Telescopes and how these may affect the performance. This is
related to the simulation of input optics currently being studied by Sany Yoshida and his group. Matt reported about
commissioning activities at LLO.
Analysis of rotating
astigmatic beam from H1 dark port
---------------------------------------------------------
(Hiro)
Keita measured the beam profile of the beam coming from the dark port to find
that the beam is astigmatic and major/minor axis is rotating as a function of z
position (Oct.22,2004 LHO elog).
This is studied by decomposing the field by a few lower order modes.
Practically, this is useful to prepare an optic to correct this astigmatism.
PhaseCamera Data Fitting and E2E studies
--------------------------------------------
(Biplab,
Hiro) We did more testing and improvement of our
fitting technique using Matlab and time-domain
outputs of SimLIGO.
Simulation of 40m
interferometer
---------------------------------------
(Monica) I'm doing transfer
functions calculations of error signals for each degree of freedom using MATLAB
after the e2e time series file has been generated. I'm doing analytical
calculations of error signals for the Dual-recycling configuration.
Modeler Codes
----------------
(Hiro)
Matt sent in a revised code to utilize threads more dynamically. Modeler code
is revised to include this and other minor issues for the next 2.5 release.
(Melody) Solved
Tom Evans' problem with building the E2E in LLO system (which uses gcc 3.4.1). The fix required some code
changes as well as using a new version of the binutils
library.
Working on speeding up the
dynamic link process used in the FUNC_X primitives. Found out that symbols can
only be exported in shared libraries, whereas we're using a static
library. Currently working on streamlining the static
library to see if that improves the overall performance.
Alfi
----------
(Bruce)
- Reorganizing parameter setting and parameter link
objects to make their usage less confusing.
- Continuing work on chaining parameter links.
Data Analysis Activities (Lazzarini)
Chatterji:
Completed modification and
testing of DMT LPEFilter and FIRFilter
classes. Proposed corresponding modifications to the kleineWelle and glitchMon
monitors. All code has been committed to the DMT CVS repository
with the exception of glitchMon modifications, which
are awaiting testing by Masahiro Ito.
Implementing Q pipeline
modifications to improve computational efficiency and incorporate calibration.
Mandic:
I worked on ways of
identifying the instrumental noise correlations in the H1H2 stochastic
analysis. In particular, by time-shifting one of the two detectors, we can
reconstruct much of the structure observed in the original cross-correlated
spectrum. Hence, such structure is likely not stochastic in nature.
With Peter Shawhan, I started preparing the hardware-injections code
for the E12/S4 runs.
Mendell:
Updated comparisons of the StackSlide, Hough, and PowerFlux
searches: scripts now exists that can run jobs on the
cluster which calculate the detection efficiency of each type of search for a
fixed false alarm rate. Results will be discussed at the Feb 3-5 PULG F2F
meeting in
Virginia Re, for the
University of Birmingham, UK, is visiting LHO until
Feb 20. he is working with me to add options to
the StackSlide code to perform a search for periodic
gravitational waves from neutron stars in binaries, such as in Sco. X-1.
I am working on improving the
Monte Carlo simulations used by the StackSlide code
in several ways: 1) the search for injected signals should include all
neighboring templates, not just the template nearest the injected signal, 2)
the LAL function, LALFastGenerateSFTs, used to make
software injections, and main bottle neck in producing results, will be sped up
by a factor of 10 or more I think, and 3) Hann
windowing of injected signals into SFTs produced by
the University of Michigan group (which are Hann
Windowed) will be implemented for comparison with usual rectangularly
windowed SFTs.
Shawhan:
* Worked on S2 LIGO-only
burst paper.
* Reviewed StackSlide and PowerFlux search
methods for continuous-wave GWs.
* Re-implemented GW
interferometer status display as a web page.
* Did some preparation for
M6/E12/S4 data runs.
Sutton:
I've been editing the
LIGO-TAMA bursts paper draft, focusing mainly on revisions suggested by the
review committee and burst group members, mainly Riles, Tohline,
and Weinstein. On the DMT side, I've made some minor changes to SenseMonitor for M6, and helped Marc Cenac
at Loyola get StochMon running with modern
calibration codes. I'm continuing to studying the inverse problem for GWB
detection (determining sky position and waveform for GWBs)
for arbitrary networks of detectors.
Lazzarini:
Continued
to work on maximum entropy methods for data analysis. I developed a toy Mathematica
model that demonstrates its operation.
LIGO Data Analysis System
Software Systems (
LDAS:
The long awaited release of LDAS(1.4.0) for Fedora Core 3 came out this week. The big
break through came last week with the discovery that the threaded performance
was coupled to the LD_ASSUME_KERNEL environment variable, which was introduce
when LDAS was ported to Redhat 9 to deal with the
poor implementation of threads in that release. Fedora Core 3 has greatly
improved the thread implementation and this has allowed us to drop the use of
LD_ASSUME_KERNEL all together for this OS. This had the effect of greatly
improving performance AND stability of LDAS under Fedora Core 3. It is now
running the best we have seen in many years! One down side to the migration is
that it has nearly quadrupoled the rate of memory
leaks in the dataConditionAPI. There is some
speculation that this is related to how the dataConditionAPI
loads in several third party libraries (FFTW, CLAPACK, maybe others) which is
different from other APIS and more closely involved with Operating System
issues. The release is available for downloading and currently running on
LDAS-DEV LDAS-TEST, and LDAS-CIT. It will be installed and started up on the
LDAS-LLO, LDAS-LHO and LDAS-MIT systems once they are upgraded to the Fedora
Core 3 Operating System. Other major changes to this release address previous
issues with the creation of short RDS frames and the FrHistory
records.
Began
exploring the
TclGlobus:
Debugging
XIO attrs and cntls
functions to support pointer data type.
Investigating
GSSAPI issues - SWIG wrapping and Tcl test cases - to
support standalone applications using security mechanisms such as X509 or
Kerberos v5.
Investigating
GridFTP issues - SWIG wrapping and Tcl test cases - to support data movements.
Resolved
some issues with wrappign pointers in SWIG.
Investigated
the integration of control monitor API with certificates. Checked out LDAS and am now identifying where changes
can be proposed to indroduce certificates for
authentication.
OSG/Grid3:
Performed
the configurations for the various components of VDT 1.3.0. Faced problems in some components
like edg-mkgridmap and edg-crl-update
and condor. So I installed the latest download again. But
still facing the same problems. Contacted the VDT
software lead to get these resolved. The problems are not pertaining to
Fedora core3 but more of VDT issues.
Still
waiting for hardware to become available to start configuring a new Grid3dev
site for OSG testbed activities.
Discussed
modifications to Pegasus abstract job flow control tool with the developers at
ISI to better support the movement of large datasets typical of LIGO inspiral data analysis on grids. A follow up on this as well as tutorials on running
codes with Pegasis on grids will take place next
Monday and Tuesday at ISI.
Hardware Systems (
Caltech
-------
(Dan Kozak)
* Brought ldas-pcdev1 up as
grid post-processing node.
* Upgraded LDAS-CIT cluster
to Condor 6.7.3.
* Got QFS license for new LLO
framebuilder.
* Received replacement 146Gb drive for 3510, installed in spares unit.
* Got 1% + interesting
scientific data LDR flow going again. LHO is copying a backlog now then
we'll find out if things working for LLO.
* Fixed Greg Mendell's grid cert on ldas-grid
& ldas-pcdev1/2.
(Phil Ehrens)
* Cabled the 80 new beowulf nodes.
*Debugged the scancluster utility based on feedback from Ben Johnson, who
used it to run badblocks in parallel on the
*Migrated improvements made
to badblocks to the patch.tcl
remote system management utility. Ongoing testing and
debugging of patch.tcl.
* Arranged with Maxtor to
allow us to return drives that we determine to be bad without running the
Maxtor disk diagnostic
.
(Al Wilson)
* Finished upgrading the 210
node in the CIT system to FC3.
* Started installing Fedora
Core 3 on the remaining 80 nodes in the CIT system.
(Stuart Anderson)
*Helped with various cluster
tasks associated with upgrading from RedHat 9 to
Fedora Core 3. Initial feedback from users has been positive.
* Received new support
contract for tape library system at Caltech.
* Continued testing NFS
mounting SAM-QFS filesystems on cluster nodes with
much higher success after the FC3 upgrade.
----------
(Igor Yakushin)
* badblocks failed on the new drive on node26. Ordered 10 more spare drives. All the other drives seems to be OK.
* Having trouble with one of
the new T3 units: cannot log into it.
* 1% LDR dataflow is
restored.
-------
(Greg Mendell)
* Media storage tapes for
archiving data between now and this summer, including S4 data, are being
ordered for LHO.
* I am currently working on
upgrading the createrds scripts to use new
functionality available in LDAS version 1.4.0. The scripts will now allow
the running of LDAS createRDS jobs that output RDS frames
with an arbitrary number of seconds per frame. This will allow, for example,
the merging of 60s GEO frames with 32 s LIGO frames, and the output RDS frames
can be of any length. The script will also fill in times near gaps in the
input data as much as possible by adjusting the number of seconds per frame.
(Ben Johnson)
* Restored L3 RDS files to
node71. L1 files have not been restored yet.
* Ran badblocks
on all of the new HDDs. Only node92 showed bad
sectors.
* Assisting Igor with setup
of Segment Archiver at LLO (the single segment util for calibration folks); though there probably isn't
enough time to get it working before M6.
* Now publishing full-frame
postS3 data to LDR@gateway. I'll start publishing
/frames data to ldas-gridmon, with a lower thread
count in megamd5 to take some of the load off of gateway.
General Computing (Wallace)
Lazzarini+Roddy: We have scheduled a meeting at LHO for 4 Feb. to
begin discussion on the changes needed in the observatory LANs to support
security requirements for the Observatory Critical System.
MIT:
(Keith)
-Upgraded library PC to
windows XP
-Installed new Axis camera in
library per request should require no config time -
just turn it on and point browser to thread.mit.edu
-Removed and replaced burned
out fan in external SCSI drive on backup server. Myron helped me solder
new fan leads to the power supply to make the connection permanent.
-Patched several windows
computers
-Experimented further with smartmon disk utilities
-Upgrading certificate on
calendar service on emvogil-2
** looking into troubles
running dmt with connections to LLO/LHO - I think
firewall issues at the sites could be part of the problem.
(
-Working on an agenda &
notes for the security meeting.
-Working on translating the
Cisco ACLs to Linux iptables
rules. I might be able to script this???
-Getting pricing for a rack
mount Linux PC to act as our router to replace the Cisco router. Assuming
that further testing goes well, I will purchase one of these and possibly a
spare depending on price. If I can get the proper device support from Solsoft to support both the Linux and Cisco router, a back
up solution could be put in place within ~1 hour if the router failed. An
automatic failover solution would be much more expensive.
-Helping Igor with a T3 disk
issue.
-Replaced a failed power
supply in a workstation.
-Going through the syslogs and security notices this week.
(Christine)
- Network usage can be seen
at
http://www.ligo-wa.caltech.edu/~christin/mrtg/
198.129.208.1_198.129.78.122.html
- Installed two new 36 Gb disks for user files. Moved some user home directories around to create more space on all
the disks. Added the new disks to the tape
backup software.
- Richard connected the LDAS
server directly to the main GigE switch in the server
room. Ldas has started transferring more data
across the network. The increase can be seen on the network usage chart
above. LDAS is now using 30 to 50 Mbits/s.
- Started upgrading the
firmware on all the printers. There have been repeated problems with
printing postscript files. The firmware upgrade is supposed to fix these
problems.
- Installed some new software
on the license server.
- Other misc. user support.
CIT:
(Mike)
-Bob Taylor: His computer had
some hardware issues. I was able to find an identical pc, and swapped out the
defective hardware with parts from this unit. He is back
up and running.
-Setup more RMA's for Stuart Andersen. I have turned this over to Ed Chargois for shipping purposes.
-NTSRV's:
Updated service packs on LLPDMWORKS & PDMWORKS.
-Working the spam filters;
checking for false positives.
-Ordered toner cartridges for
all printers.
-Additional misc. onsite/phone
user support.
-Burned ghost images of NTSRV's for Larry Wallace to send off-site.
(Veronica)
- LIGO: Updates to
- LSC: Website
updates. Posted papers for the LSC review and started working on a
website for the upcoming meeting.
(Larry)
-Worked a number of
procurement issues. Just received a new set of quotes from a
company that SUN is using for their maintenance contracts. The LDAS
group has already used them and the company so far has been pretty responsive.
No other major procurement problems. P-card reconciliation went well for once. Purchased misc. items for the GC and LDAS groups.
-Started preparations and
going over the logistics for the abatement, in
-Assisted the DCC group with
a variety of issues. So far all have been resolved without any major effort.
-Worked with Janeen on a couple of PC issues. The last item is a problem
with the Algor s/w not being able to complete its FEA
on a model brought in from Solidworks. Presently, it
looks like there is a resource conflict with a fortran program used for the analysis. We still have
some more digging to do before this issue is resolved.
-Worked on the computer room.
We still have a lot of hardware that needs to be shuffled around.
-Added a couple of new user
accounts and modified a few accounts for existing users.
-Resolved a number of e-mail
issues.
Continual work on the spam
filters with Mike.
E-mail statistics Jan 13, 05
- Jan 19, 05:
Rejected Mail
11,758
Virus
794
False
Positive 79
Accepted
11,522
Total
Mail 23,326
Adv. LIGO Systems
from Dennis
Coyne
See
also the AL
Systems web page
See also the RODA
status web page
No new RODAs this week
RODA M040005-01 on "CP location, dimensions and mass baselined", is further along in the review/signature process
· nothing
new
· posted
a list of SUS quad interface issues that were discussed 12/2, with post meeting
notes (T050005-01); See the "Interfaces" section of the AL Systems web
page
· Continued discussion on cost, schedule, interfaces and
performance issues for the AL SEI/BSC System as part of the Critical Review.
A draft report will be circulated to the SEI team and review committee next
week. A review report from the committee is expected by 1/30. Follow up review
meetings will be needed.
From: "Thomas Frey"
<tfrey@ligo.caltech.edu>
Progress Period from 01.14 to
01.20
Out of the office on
01.14 and 01.17
·
See http://www.ligo.caltech.edu/~tfrey/index.html
for a complete listing of all project related cost and schedule data.
Accomplishments:
·
Sub-system PLANNING activities
§
Continued work on preparing web space for posting
Adv. LIGO reports. ("The Whole Enchilada")
§
Continued work on the 40-Meter schedule changes.
§
Executed telcom with
Carol.
§
Continue to catch up on filing from last year.
§
Continued work on AOS schedule changes.
·
ROSTER
DATABASE:
§
Assisting Irena as needed on record changes.
§
Continue to assist Irena with setting up her web
site to accommodate review of attachment As.
·
COST
BOOK DATABASE:
§
Continued work on changes to estimates for AOS and
IO.
Larry Jones ljones@ligo.caltech.edu has
passed the baton for Advanced LIGO Seismic Structure reporting to Ken. Thanks
again, Larry!
From: Ken Mason
<kmason@ligo.mit.edu>
Advanced LIGO Seismic Structure
BSC SEI Structure:
An Information Exchange Meeting was held at ASI this week. ASI Engineers
walked us through their plans for the assembly, alignment, and testing of the
advanced LIGO seismic design.
22 additional structure drawings have been posted on the ASI web site this
week, making a current total of 43 released drawings of a planned 131 drawings.
We recieved a CD which contains the solid models of the fixtures and tooling required to assemble the BSC
seismic isolation. These models will require some additional design and we will
need to create the fabrication drawings.
A monthly status meeting was held on
Several days were spent with Larry Jones reviewing project status and
information. I want to thank Larry for all his help during this transition.
Actuators:
We anticipate delivery of the actuators by January 31st.
Displacement Sensors:
Nothing new.
Seismometers:
Nothing new.
AdLIGO SEI (Jay)
====================================
- Todd will start working capacitive position sensor chassis design.
- Dave will work on large coil driver as time permits.
From: Janeen Romie <romie_j@ligo.caltech.edu>
AdLIGO Suspensions
Working on tablecloth design details and interface
with Calum, Tim and Mike PL.
Held a meeting with the installation fixtures design folks and ironed out a
number of details. It was helpful to have Ken Mailand
and Oddvar, along with Ken Mason and Calum in one room to go over these issues.
Held a meeting with David Shoemaker, Laurent, Ken Strain, Norna and Calum about the testing
of the mode cleaner. We will have a follow-up discussion on February
1st.
Algor has had a number of errors trying to analyze
the complete structure and we are trying to understand the sources. Calum, Russell, Mike P-L and Tim have been working to make
sure the models have integrity. I'm working with Larry Wallace to make sure it
is not a computer problem of mine.
Will hold a quad wiring meeting tomorrow morning at
AdLIGO SUS (Jay)
====================================
- Need to build up quad test stand in Sync Lab.
From: Ken mailand <kmailand@ligo.caltech.edu>
I'm currently working on the lower
suspension installation arm to move the suspension from a carrier outside the
BSC chamber, to the fine locating adjustment table inside the chamber.
From: Bill Kells <kells@ligo.caltech.edu>
Continuing on analysis of the HR scatter loss issue. There is now data from LLO
coming out (via G. harry) which can be compared to
that I have accumulated from LHO. Consistency not clear
yet.
Also have been looking[more] into the possibility of measureing a signature of the "parametric
instability" (say in present LIGO). This would be a sub threshold noise enhancement
at the parametric resonant frequencies.
From: Peter King
<pking@ligo.caltech.edu>
As part of writing the intensity stabilisation
section of the conceptual design, I have been looking into the various
standards the electronics are supposed to conform to but I have not figured out
the dependency tree yet. Thanks to Todd for leading me to MIL-HDBK-454.
From: Riccardo DeSalvo
<desalvo@ligo.caltech.edu>
Marco
I helped Juri for the Flat Top Beam Cavity Prototype
presentation for the Aspen Workshop. Riccardo and I
prepared the vertical suspensions blades for a re-cooking and fixing their
hardness, and so bringing them to the elasticity region.
Completed and tested the DPM circuit for the PZTs
drivers, and then calibrated his scale.
I begin the layout design of the box and Im
inventorying the needed parts.
I saw the first TEM00 data on Matlab. Data analysis in progress (only a study of the ASCII data from BeamScan software).
Im
continuing to take data from the creep experiment at the temperature of 1700 C.
After a week, the equilibrium point is quite stable.
Alessandro
Submitted the two accelerometer papers for internal review, they can be found
in:
http://www.ligo.caltech.edu/~desalvo/bertolini-acce-mech.pdf
http://www.ligo.caltech.edu/~desalvo/bertolini-acce-elect.pdf
Riccardo and Juri,
in
For additional information about this report, contact whitcomb_s@ligo.caltech.edu