The LIGO Executive Committee Agenda for Monday August 30, 2004 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items:
Minutes of LSC Council meeting at the LSC meeting, LHO, 18 Aug 2004
1. Applications for membership
The case for Szabi Marka (Columbia) was put forward by Stan
Whitcomb. After
discussion, the Council voted by secret ballot to admit the Columbia group.
The case for Eric Myers (Vassar) was put forward by Bruce Allen.
After discussion,
the Council voted by secret ballot to admit the Vassar group.
Congratulations to both new members!
2. Integrity Policy
Gregg Harry presented the revised version of the proposed
Statement on Scientific
Integrity. Revisions had been made by him, Brian O'Reilly, and Peter Saulson,
to
take into account the criticisms of the wording of the earlier draft, as
expressed at
the March meeting of the Council. After two suggestions for minor corrections,
the
Council voted to approve the Statement.
3. New MOU review system
The Council received a briefing on the new plan for review of MOUs
annually by an
LSC panel.
4. Thoughts on restructuring the LSC and its relationship to the Lab
The Council received a briefing on the various discussions that
have taken place
about restructuring the LSC and its relationship to the LIGO Laboratory, and
discussed
various alternatives.
Kip Thorne had been charged by the Caltech administration with
bringing back to them a sense of the LSC's thoughts. He summarized what he
heard by
saying that he had heard no significant pressure to move LIGO from Caltech to
some other
sponsoring institution or collaboration, and had heard some significant support
for
continuing with Caltech. He also said he had heard that it was essential to
have
representatives of GEO and of LSC institutions on the LIGO Oversight Committee.
Other issues will probably also come forward, such as ensuring
that LSC members with
appropriate expertise be able to play suitable roles in the Advanced LIGO
project structure.
There was no attempt to establish a consensus on a new structure,
because
several alternatives are on the table, and many details remain to be worked
out. But it
is becoming necessary to converge on a new plan soon. (The next LIGO Operations
proposal
must be submitted to the NSF early next year, so its contents need to be in
place well
before that.) Small group discussions will continue, including the Lab
Directorate.
Preliminary discussions with the Caltech administration will also begin. The
Council will
be consulted, most likely via a telephone meeting, when a specific proposal is
ready to
be discussed.
*************************************
Minutes of LSC Executive Committee meeting at the LSC meeting, LHO, Monday
16 Aug 2004
Attendance: Bruce Allen, Barry Barish, Patrick Brady, Sam Finn, Joe Giaime,
Albert Lazzarini, Dave Reitze, Keith Riles, Peter Saulson (minutes),
Bernard Schutz, David Shoemaker, Daniel Sigg, Rai Weiss, Stan Whitcomb,
Benno Willke, Alan Wiseman
Paper on Externally Triggered Search for GRB030329
Keith Riles presented the recommendation of the Burst Review
Committee, in favor
of publishing this paper, subject to completion of a few minor editorial fixes
and
bookkeeping checks.
The Exec Comm discussed the paper. No members had any substantive
worries about it.
The committee voted unanimously to recommend publication, subject to
satisfactory
completion of the reviewers' minor changes, and also to the requirement that
the
analysis code be placed in a CVS repository.
GEO plan for night-time data collection
Bernard Schutz and Benno Willke presented GEO's plans to begin
collecting data when
commissioning is not taking place (i.e., most nights.) This is based on the
interferometer's
excellent duty cycle, and also its ability to relock itself automatically if it
should lose lock.
The plan is to leave the interferometer running, with calibration
lines injected.
The automatic online calibration program produces calibrated h(t), as well as
tests
of the quality of the calibration model's fit to the data. Each morning, a
scientist
would examine this, and assign a data quality bit (good or bad) to the previous
night's data.
Bruce Allen remarked that both the Stochastic and Pulsar groups
are interested in using
this data. Sam Finn noted that this will help the LSC to get into the mode of
keeping
up with data in real time. It was agreed that it would be necessary to get information
about good data segments into our data segment repository.
David Shoemaker raised the question of whether LIGO should also be
doing something
like this. It isn't clear, though, that LIGO yet has the robustness (especially
the
ability to run without well-trained operators) that would enable this to be
done without
a great deal of effort.
New plan for review of MOUs
The Executive Committee discussed a proposed new system for
reviewing MOUs of
LSC member groups. In this revised system, all MOUs would be reviewed together
at an
annual meeting of a board consisting mainly of chairs of Technical Working
Groups and
Analysis Groups (along with a few other experts on topics that don't fit into
those
categories, e.g. commissioning.)
The expected advantages of the new system are:
*The LSC and the Lab would get a better picture of the whole effort of the LSC,
be
able to spot gaps, and could ensure that we have both the right plan and that
we are
making good progress.
*This will use the expertise of the LSC and enable the LSC to take
responsibility
for its work.
*PIs will get feedback on what is or is not going well.
* This system will allow more timely recognition of situations when planned
work
is not being accomplished. Some sort of probation could result or, in extreme
cases,
loss of LSC membership.
It was agreed that such a system was a good idea. Given the
intensity of the
review effort, an annual review seems to make more sense than one every six
months.
(It remains an open question how to handle work with Advanced LIGO
deliverables.
Almost certainly, more frequent progress reporting is necessary.)
The plan is to bring this into operation in time for the Feb 15
renewal cycle.
A transition to the annual cycle might occur after a second run-through in
August.
The exact timing, as well as many other details, will be worked
out by a
committee consisting of Albert Lazzarini, Dave Reitze, Alan Wiseman, and Joe
Giaime.
STATUS OF LSC MOUs (Petrac)
No report
SITE TELECONFERENCE (Lindquist)
A site teleconference was scheduled for Thursday, August 26,
2004. The following issues were discussed:
The list of assigned actions updated through August 26, 2004 may be found Here.
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>
Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport.
(For passwords contact Florence)
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
PROPOSAL and REPORTS (Lindquist)
Schedule of proposals and reports planned for the remainder of the calendar
year.
We have essentially completed the Annual Report with the exception of a few
missing pieces. Overall there is a lot of good stuff reported. Most
has been entered into FastLane. I think that it is basically ready to go
except for scrubbing the publications list.
A Final Report for the old LIGO Visitors grant has been submitted via FastLane.
CHANGE CONTROL/CONTINGENCY MANAGEMENT
(Lindquist)
There are no open change requests currently in the system.
The Advanced LIGO SEI group proposed to the LIGO Excomm on 23 August that the
budget be increased for the ASI contract, adding on the order of $750K in funds
to cover a growth in expected expenses with a slight decrease in contract
scope. This will be discussed again next week.
HUMAN RESOURCES (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Quality/Safety (Tyler)
>From: Bill Tyler <tyler@ligo.caltech.edu>
No report this week.
.
Summary of Commissioning Activities at LIGO Hanford Observatory (Landry)
LHO hosted the post-LSC Detector
Investigation Camp. Twenty-five sessions by 17 different presenters
were held on analysis tools, data access and detector artifacts. Thanks
to Christine Barker, Richard McCarthy, Dave Barker and Terry Santini for help
making the camp successful.
Acting NSF director Arden Bement visited LHO on Tuesday.
Recall that stick-slip events associated with thermal cycling of the LN2 dewar
outside the LVEA are thought to be responsible for a significant number of S2
and S3 IFO unlocks. Insulation of the LN2 dewar appears to have knocked
down glitch
rates. Next we hope to see
that we get the expected increase in duty cycle during science-mode running.
RF spectra and 60Hz noise were measured
in the end-stations and corner station. Some follow-up
showed that the basic conclusions of the original measurement are correct,
however at a lower level: the ETMY is the largest offender of 60Hz and
harmonics. Strangely the latter measurements showed worse noise when the
spectrum analyzer was powered with batteries (as per the earlier
measurement). LLO end-stations,
newly equipped with RFI mitigation, are at least an order of magnitude quieter
at 60Hz and harmonics that those of LHO.
4K IFO
-----------
Minimizing angle to length coupling with test mass diagonalization
resulted in improvements for cavity optics; a factor of ten and five less
coupling was achieved for ITM and ETM masses, respectively. This yielded
improved low-frequency performance in displacement
spectra.
One more noise source to think about: point scattering.
It was suggested that twinkling seen on camera views of beamsplitter (BS) and
fold mirror (FM) masses were simply motion of the uncontrolled optics relative
to the standing wave of a locked interferometer. What remains to be seen
is the calculation for the intensity noise as this light couples in
differentially into the arms, and potentially upconverts.
Looking
at AS_Q with RayleighMonitor, one finds periods in which the power spectrum
is too steady. Currently a mystery.
As the TCSX crosshair and beam centering servo point did not overlap, the
latter was used to overlap the two and investigate TCS get performance;
less TCS power is now required to maximize SPOB. The current TCS and SPOB
status is summarized here.
A differential TCS servo was later added.
2K IFO
------------
The new Faraday installed in the 2k was assessed, and it seems bang
on. The 2k MC however has developed a penchant to lock on the wrong
polarazation.
DAQ
------------
Fast VMIC processors were tested.
no report
see also the CDS weekly meeting minutes in the commissioning archives:
no report
Jay Heefner reporting
Fiber Optic Timing Link (Sander)
=========================
- The prototype is installed and running on the 40M Y end. It appears to work, but synchronization needs to be measured.
- Sander is starting to think about the link that will be required for the timing system redesign.
Timing System Redesign (Flavio)
==========================
- Progress has been slowed by ISS work. There is a very rough requirements list that will be refined into a requirements document over the next two weeks.
Anti-Image Filters (Jay)
============================
- We are still waiting for 2.2nF caps to complete the remaining boards. We can substitute other components if the sites require the boards immediately.
40 Meter (Jay, Ben)
=============================
- Working on optical lever servos.
- Need more extender boards.
- Working on various problems associated with daq and timing system.
ISS (Flavio)
============================
- All H/W, cables and cross connects installed in 40M.
- Need database and screen updates.
- Testing will start today.
EMI Upgrade (Mohana, Jay)
============================
- Revised ASC and LSC drawings sent to LLO.
- Need to add MC WFS to ASC drawings. Should be complete by today.
- Need to order more cables.
LSC PD ((Ben))
============================
- Prototype board is being stuffed. Testing will begin this week.
TNI (Jay)
=============================
- 2 arm cavity servo amps delivered
- working on EPICS interface and automation.
HEPI LASTI (Jay, Rolf)
=============================
- Install VME controls at LASTI in Sept.
Elect. Shop (Todd)
=============================
- Working on LHO spares, satellite amps, LOS Coil drivers, 80MHz VCO, 100 ea. 2 ft 4-pin LEMO cables.
- Don's last day will be sept 21.
PeterKing
A pre-modecleaner is under construction to replace the one on loan to Stanford.
Dave Grimmett repaired an old VCO. A problem was found with a solder bridge underneath one of the RF attenuators. During the course of firing it up again, another problem was fixed with the modulation input.
Mike Smith
I finally have some results with a Zemax model of the
unfolded 4-mirror OMC based on Keita's original design, which has an
out-of-plane of incidence input cylindrical mirror with radius 76.3 (which I
will re-label as Rx); an out-of-plane exit mirror, Rx = 76.3; two in-plane
mirrors Ry (re-labeled) = 101.7. The unfolded geometry is as follows: the beam
enters through (my) Rx, and forms a beam waist 1 unit beyond, which is midway
between the entrance and output mirror faces; the beam travels 1 unit and
reflects from Rx; it travels 1 unit and reflects from Ry; it travels 2 units
and reflects from Ry; it travels 1 unit and reflects from Rx; it travels 1 unit
to reach the center of the cavity and completes one round trip. The input beam
waist at the center of the cavity, between the input and output mirrors should
be replicated after making one round trip. I propagated a physical optics
Gaussian input beam from outside the cavity, and adjusted the x and y beam
waists of the input beam to compensate for the astigmatism caused by the first
input mirror. The results are as follows:
all dimensions are in millimeters
input beam waists (at the center of the cavity): wx = 0.096, wy = 0.099
input beam position error: dzx = +1.7, dzy = -2.2
output beam waists (at the center of the cavity after 1 RT) : wx = 0.097, wy = 0.099
output beam position error: dzx = +5.7, dzy = --10
The astigmatic input beam that was required to correct the astigmatism of the OMC is:
wx = .088, wy = 0.099
Such a beam would have to be constructed with an external astigmatic telescope.
I am in the process of modeling the alternative design, in which the input beam enters through the Ry = 101.7 mirror with the curvature in the plane of incidence.
Ken Mailand
The main cavity spacer and the PZT holder bracket drawing
are at the CES shop, along with the 'invar 36' material,
to make it. Mike Smith will finish an optical layout soon to resolve a question
re.the possibility of astigmatism in the system.
Ken Mailand
i have been working on a layout for the laser chiller, and ordering purchase parts for a test, for Phil Willems.
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 is locked.
We continue taking measurements everyday. No Change
Absorption Test Measurement prototype in standby!
Scatterometer system in standby!
Received the (2) new sets of posts for the support of Sapphire holder.
These new posts will give the sapphire mirror surface more space and make laser
alignment
more precisely of the two beams He-Ne and ND:YAG.
The Quantronix 60 watt laser NO CHANGE
OTF Lab at Lauritsen ROOM 38
NO CHANGE!
Cavity #3
Chamber is pumping with (6) disks of TRA-BOND #2151 color blue epoxy and
(4) disks of TRA-BOND #2902 color silver epoxy. The cavity is
locked.
We continue taking daily measurements.
Cavity #2
Taken to the shop to weld the leg support in place.
Since our last report, we have been constructing new servo electronics that can be computer controlled, in preparation for a measurement of non-Gaussian noise. The servos are essentially complete now, lacking only a way to switch the boosts on and off. Akira is working on a box with manual switches to test the servos, while Jay is working on the computer that will both sense the state of the instrument and perform the switching automatically.
Triple Installation and Shakesdown (Reported by Laurent):
Most of the HEPI system has been installed now, the 8 actuators and 8 PS are
installed, the pier boxes interface are installed and the cables have been made
and installed. The seismic interface and valve driver are ready to be powered
in the rack and connected. The next step, and I hope I can finish that today or
tomorrow will be to power the electronics (we missed fuse block) and build the
termination block to merge with triple system. Then I'll be ready to test the
sensors measurement. as soon as we will be ok with the sensors we will be able
to take the valve off the BSC to install on the HAM (hope we can do that monday
or tuesday).
software and data (Reported by Laurent):
I added Calum's model to the software (which I realized was not compatible with
old version of matlab). I have been able to compare my data taken in noisy
environment with the model and it match pretty well for some dof. However I
also realized one of the sensor (top2 OSEM) seems to work strangely in
perpendicular excitation (impossible for example to have a good longitudinal
-> roll transfer function). I think it is because this OSEM is going out of
range in this case of motion. We will probably check it visually next time we
have the opportunity to access the triple.
Adaptive Feedforward System (Rich M) Work continued on the adaptive feedforward
system with a isolation up to 15 Hz. This was achieved by putting a geophone on
the floor, directly under the HAM chamber
Simulation and Modeling
(Bhawal)
Thermal lensing and as-built mirrors
------------------------------------------------------------
(Hiro) A talk was given at the LSC meeting last week and also in this
week's
e2e Physics meeting (http://www.ligo.caltech.edu/~hiro/G040328-01.pdf).
The application of this interpretation to commissioning is under
investigation, including the distinction between the BS curvature effect and
the effect due to difference of two ITM absorptions.
FFT study: mirror maps and WFS
----------------------------------
(Biplab) The manual correction of equivalent angles for asymmetries in mirror
maps calculated from the Wavefront sensor (WFS) signals is not in all cases
becoming very effective below a level of a few 10^-8 radians. The possibility
that the WFS matrix may have been calculated either (i) outside the linear region,
or (ii) in a region overshadowed by intrinsic offsets originating from mirror
map asymmetries under various orientations, was investigated. WFS matrices
calculated by perturbations of plus & minus 10^-7 before averaging and
similarly for 5 X 10^-8 rad look to be in good agreement with each other
suggesting that such values of perturbation are still in linear region.
FFT code
----------------------
(Hiro) FFT code has been modified so that input files can be much easier to
maintain. This makes it easy to calculate ASC/LSC signals, because those
signals need many runs with different parameters.
e2e code maintenance
---------------------------------
(Hiro) When compiled on decatur@ligo-la, a problem was found in building
modeler. It turned out that gcc 3.4.1 on decatur applies more strict C++ syntax
and MEMatrix template class needs to be modified to conform to the standard
more strictly. Fixing is almost done. ModalModel class has been revised to be a
first class C++ class from a mixture of C functions and C++ classes. This
change is expected to speed up some and will be more thread-safe. This class
has all the modal model matrixes documented in the latest e2e time domain modal
model document.
Alfi
----------
(Melody)
Finished modifying the ALFI bookkeeping objects to allow displaying the FUNC_X
data variables in a friendlier user interface. Currently modifying the
dialog to incorporate the new way of displaying the parameter setting variables
and values.
Evaluated 2 Java debuggers (jswat and jdebugtool) to aid in figuring out some
exceptions that was being caught by the application. I decided to
use jswat which is an open-source software for its performance.
Data Analysis Activities (Lazzarini)
Yakushin
1) Making pictures and tables for S2 burst paper.
2) Testing sample S3 MDC frames before starting full scale production.
3) Writing LIGO note about S2 MDC frames to refer to it in S2 burst
paper.
Lazzarini:
Working on H1H2 analysis and H1L1 re-analysis to cull outliers from
sliding PSD estimator;
Working on calibration review committee activities
LIGO Data Analysis System
Software Systems (Blackburn)
We are preparing for the 1.2.0 release of LDAS. Two significant Problem Reports
attached to this release remain outstanding. In addition we are awaiting
confirmation from the Burst Group on the current form of the sngl_burst table
SQL schema. We had to make several modifications to the original design and
would like thier blessing before adopting it for the release.
The effort to generalize the definition of time intervals in the disk- CacheAPI
continues. This is a big overhaul of the code and hopefully will make the 1.3.0
release of LDAS.
The circumstances surrounding last weeks coredump in the diskCacheAPI are still
unexplained. It is strongly felt that this is due to a thread safety issue in
the C++ code but the occurence is very raw and not enough insight was gained
from the LDAS logs and the core file to pursue a fix.
Updated the "sinstall" script rules and ldas documentation to capture
recent changes to packages in LDCG: gdb, gd, python, imagemagick, gnuplot, gsl,
mozilla, cvs, apache, and cvsgraph.
Corrected mistakes in documentation for openssl and removed several broken
links on our webpages.
Discovered that the memory leak for the dataConditionAPI on the LDAS-TEST
system was 4 to 5 times larger than on LDAS-DEV. The LDAS-DEV system has
pentium hardware that support hyperthreading and the code is compiled on such
architectures. However, the LDAS-TEST system doesn't have hyper- threading and this
is thought to be somehow involved in the differences in memory leak size. A
short test to compare size of memory leaks when hyperthreading was disabled on
the LDAS-DEV system brought the difference down to only 40 percent.
Added totals to the statistics for the x and y axis of histogram plots in the
controlMonitorAPI's gui. Added these statistics to print out for all histograms
including job command and dso filters, database and time graphs.
Worked on a generic thread wakeup function to wake up all tardy threads. This
currently only being used by the lightWeightAPI and testing is under way on the
LDAS-DEV system.
------------------------------------------------------------------------ --
-------------------- Weekly from August 19th
-----------------------------
Weekly system and integrtion tests identified a bug in the diskCacheAPI this
weekend. This API coredumped during the dcmangle test which is used to
demonstrate the ability to handle changing mount points for locating frame
files. It is thought that this is a thread issue that has been in the code for
quite sometime, but is rarely exercised. The weekly system tests also include a
new test to validate support for the new complex data channels that have been
produced. Other than the issue with the diskCacheAPI, no other issues were
idenitified.
The dcmangle script was repeated several times to try and exercise the bug that
caused the core dump this weekend. This was unsuccessful (typical of thread
issues). In an effort to fix the bug, a careful code review of the API has
begun, taking advantage of the lessons learned when a similar issue was
encountered in the frameAPI last year.
Work continued on the port of LDAS software to the Solaris compiler. Solaris
provides its own version of STLport for that compiler since the open source
version doesn't compile on Solaris and the fixes are held only at Sun.
Unfortunately, the Solaris provided STLport has a bug in its fstream class
which has lead us to the geodesic of customizing our own fstream class as a
substitute.
We are currently running long term tests on LDAS-Test to identify possible
memory leaks. We will also attempt to isolate new memory leaks using the
utility "valgrind" prior to the LDAS release in a couple of weeks.
The controlMonitorAPI now has the ability to monitor the usage of the beowulf
cluster on a per user or per dso basis. This will allow ranking the top users
and search codes on the beowulf cluster under LDAS.
The missing documentation for the compression libraries, bzip2 and zlib have
been added to our how to build LDAS website.
Work continued on restructuring the underlying diskCacheAPI code used to
maintain and search through time intervals.
The new sngl_burst_table changes were tested on a tandem LDAS system this week.
These tests identified issues with the design proposed by the Burst Group. The
co-chairs of the Burst Group were provided feedback as a result of the testing
issues and further changes to the table design were made that cleaned up the
problem.
Closed out PR 2658 - ldas generated email now have a common informative
message.
Closed out PR 2151 - mpiAPI needs faster clean up based on a sudo method.
Closed out PR 2663 - a defined set of users may now create new subdirectories
under LDAS for RDS creation as part of the user command.
Hardware Systems (Anderson)
Caltech
-------
(Dan Kozak)
* Continued the transfer of non-run second trends for both LHO and LLO (about 1,000,000 files total) from HPSS
to SAM-QFS (and their subsequent deletion from HPSS).
* I started with LLO: of the 458620 LLO files, we've transferred 410798
as of this writing (89%).
* I've also LHO second trends transferring--we've transferred 288168 of
526258 files as of this writing (54%).
* HPSS has failed totally several times this week. The crash of DCE over
the weekend has caused the SFS backups to beginning failing again. I've
submitted this to Mike Gleicher, but haven't heard back from him. In the
meantime, I'm just moving the SFS backups into a different filesystem by hand
to prevent that from causing HPSS to crash again.
* Have been working on getting a quote from STK for silo maintenance.
* Have been working with Sun on the problem where shared clients (in this case
alterf) ask for files, but they never get staged.
(Hari Pulapaka)
* Working on transferring C01_LX data to CIT.
* Added new users to CIT cluster, wrote a utility to add users.
* Working on upgrading condor on the cit cluster.
(Al Wilson)
* Node8 in the test system failed its burn-in test. Contacted ASA to send the
whole (case and all) back to them for repair.
*Systems compromised. It seem that the LIGO might be a target. Sent the better
part of a day or two to confirm that the LDAS systems here at CIT are secure
and that there were no breach of security. Glad to report that we can sleep
soundly. As a pro-active measure we will be changing access passwords.
* Bosco, has its new CD rom installed. It is currently being loaded with a
fresh install of RH.
(Stuart Anderson)
* Continuing to report and test several SAM-QFS 4.1 bugs so that they
will be fixed for the 4.2 release.
* Merging most of the GNATS tables on ldas-sw to a single account
database.
MIT
---
(Keith Bayer)
* Working on first dead cluster box.
* Preparing benchmark numbers for pcraid#7.
* Working on adding grid users to cluster.
* Working on testing new gridftp server.
Livingston
----------
(Igor Yakushin)
* Replace failed harddrive in 3510.
* Database replication test between LLO and CIT has been running for 2.5 weeks
successfully replicating triggers produced by slope DSO. Over 6.5*10^6 rows
have been inserted into sngl_burst table at LLO and replicated to CIT. The
replication was able to keep up with the trigger production in real time.
Hanford
-------
(Ben Johnson)
* Setup temporary GC linux box so users could use gsissh + the necessary Globus
tools for the Det. Char. Bootcamp. This has been removed, but the
"/etc" on that host archived for the future
Linux@ldas-jobs.gc-network setup.
*Shoehorned gsissh/Globus on Sol8 GC boxes (not working on fortress unfortunately).
Users can now log into ldas-grid using their GC accounts by copying over their
cert and key then sourcing some config files in my GC user directory.
* Replaced ldas-pcdev1 box with the old beowulf Dell machine due to
harddrive failure. The "new" box appears to be working.
* Upgraded the rls server on ldas-gridmon and ldas
* Replaced bad 3510 disk. The second one ever to be replaced on that
machine.
* Added second and minute and /dmt/... directories to MOUNT_PT. The detchar
bootcamp showed many users the wonders of getting data from LDAS via guild.
* The linux-based web page monitor in the control room has died (i.e. failed to
reboot after "reboot" was issued). Various attempts at resurrection
have failed.
General Computing (Wallace)
MIT:
(Keith)
-Investigated hacked account
-Working on upgrading gc proposal
-Upgraded 2 more Ultra 10 boxes to Solaris 9
Livingston:
(Shannon)
-Fixed a problem with NIS+ & LDAS where a client would not return the FQDN
for ldas-grid.ligo-la.caltech.edu. Evidently this problem has been weeded
out most places, but at LLO, Natalia was the first person to try and connect to
ldas-grid with the grid enabled ssh.
-Installed a computer in the auditorium to handle future multimedia
needs. I will have to install some acoustic foam in the rack to keep the
noise down. I have ordered the foam... It claims to have a noise
reduction coefficient of .85.
-Created a /apps/LAL_zotov directory. Natalia is planning on maintaining
a copy of the LAL, etc. software in this directory. She wishes to keep up
with nightly builds, etc.
-Had an opportunity to test the restoration functions of the new backup
software. After digging for a while, we determined that the problems that
one of the users here was having were related to a change of their .cshrc. It
is still puzzling how the file was modified, however we were able to restore
her old cshrc from a file on tape that was dated Feb 14th. The restore
utility allows fine grained selection of which version of the files you wish to
restore.
-Usual rounds of support issues...
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
- This week has been quiet. Most staff members that were involved with
all the meetings are taking time off to recover. A few visitors stayed on
this week to do some commissioning work.
- I think most everything at all the meetings went well. There were
some problems with the wireless network dropping out in the auditorium and on
the first day of the LSC there was a problem with the NAT router not being
configured for enough IP addresses. With the attendance at these meetings
growing, there was a problem in that the properly equipped meeting rooms are
too small and the larger meeting rooms are lacking network, power and
phones. We also didn't have enough larger meeting rooms.
- The detector camp had some logistics problems as far as trying to get
everyone logged into the GC network with the proper configuration to run the
data analysis tools and to gain access to the LDAS Grid. I think in the
end most everything was accomplished at least for the demonstrations if not for
each individual.
- At the start of the detector camp another one of the disks containing the
user home directories started going bad. It was reporting bad sectors and
read errors. Access to the disk was excruciatingly slow and finally it
generated so many error messages it crashed the file server. I had a spare disk
ready, but trying to tar files from the bad to disk to new disk was taking way
too long, so I restored files from my tape backup then just copied any files
that had been changed on the old disk but not on the new disk. It took
two days to get everything moved and restored to normal, mostly because I had
to keep the old disk on line as long as possible and allow users to continue
using it and the server for the detector camp.
- The rest of this week has been spent cleaning up after the meetings. The
equipment borrowed from CIT Ligo was packed and shipped out. The NAT
router will be shipped back to LLO later this week. The temporary wiring
for the wireless antennas is coming down until a permanent solution can be
designed.
- Other Misc. user support.
CIT:
(Lisa)
- Resolved a printing problem on sirius that was affecting those using samba to
print.
- Ligo had bad blocks on its boot disk causing it not to boot. I took
another box and restored from tape backup to get ligo back up.
- Jumpstarted an ultra10 and a blade100. The blade100 will be built as a new
dns server.
- Spent an hour trying to find an infected pc whose mac address is not in any
of our tables.
- Helped Mike out on a virus problem on m32.
- I'm still working on trying to get more of the incoming spam discarded.
Mail Stats 08/19 - 08/25/04
Messages Accepted:
Spam Rejected:
Viruses Rejected:
False Positives:
Total Mail Thru:
% spam blocked:
(Veronica)
- LSC website: Posted the bulk of the talks of the August meeting as they
arrive. Updates of other pages (author list, papers for review).
- LIGO website: Mike and I set up and webcast'ed the last LIGO seminar. Both
VRVS and the webcam worked well. Updated the Seminars webpage. Continued
tutoring Sharon on html and web updates.
- GNATS administration/ user support.
- CaJAGWR support.
(Mike)
-Worked on all NTSRV's updating security and searching for system errors and
intrusion attempts through event viewer.
-Barry Barish: I backed up his laptop and updated his office installation. I
also installed X-terminator to eliminate spyware, adware, malware and key
loggers.
-Linda Turner: OfficePC picked up a virus that requires me to reload her
workstation from scratch. I have started working on this.
-I worked on setting up a video-conference in SCR. This required setting up
VRVS equipment, updating software, setting up an additional web-cam and
reconnecting both network switches. All video and networking equipment was
disconnected in SCR. After connecting equipment, I ran multiple tests to
confirm that everything is working correctly.
-Started re-loading a PC that got infected with a virus, up in the 3rd floor
control room, on W/B.
-Other misc. user/phone support.
(Larry)
-Went through a number of orders. Most of the orders have arrived and are being
distributed and/or assembled.
-Spent a number of hours cleaning up the computer room after the fire
suppression installation. There are a few more tests that have to be run. One will
include a discharge of the gas which will require us to turn some of the
computer equipment off. Hopefully, we will be able to keep all of the core
equipment running during the test.
-Chased down a couple of h/w and s/w issues on different servers. Fortunately,
the units we are having problems with are scheduled to be replaced in the next
few months.
-Assisted Mike and Lisa in chasing down some infected machines.
-Worked a number of user accounts and still working on getting old accounts
cleaned off.
-Regular user support.
From: "Thomas Frey"
<tfrey@ligo.caltech.edu>
Progress Period from 08.20 to
08.26
Out of the Office on
8.20 and 8.23
·
·
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 the input of changes / preparing RFIs / responding to RFIs, as
a result of the meetings with Carol and the Subsystem Teams.
§
§
Executed telecom with Carol W. and Phil L. regarding ongoing efforts for
revising AdL project data. Agreed that Tuesday's at
§
§
Started work on LASTI schedule changes as provided by Carol.
Discussed these changes with Janeen to make sure the SUS team is accommodated
and continued modifications accordingly.
§
§
Executed a telecom with Janeen,
§
§
Prepared follow-up information to discuss with Janeen. (Relation of COC
Large Pathfinder to Final Bonding Development) Started schedule changes
to SUS plan.
§
§
Started to prepare comprehensive FY2005 data as requested by Carol W.
·
·
ROSTER DATABASE:
§
§
Continued to work with Irena to provide Barry with information regarding
FTEs and Institutions.
§
§
Updated and posted the approved version of the LSC S2 Authorship List
§
§
http://www.ligo.caltech.edu/~tfrey/authorship/compare.htm
·
·
COST BOOK DATABASE:
§
§
Discussed briefly with Garilyn B. the opportunity of having COC be the
pilot project for implementing activity (cost sheet) based accounting.
§
§
http://www.ligo.caltech.edu/~tfrey/rd2005/Acct_Stats.htm
From: Larry Jones <ljones@ligo.caltech.edu>
Advanced LIGO Seismic Structure
SEI Structure:
The LIGO Executive Committee has agreed
# DHS in principle – a look at the overall budget implications, and ways to limit other costs, R&D in particular #
with the AdLIGO
Management Team's proposal for dealing with the increased cost of the ASI
contract effort. This proposes that we continue with BSC prototype fabrication,
but not to start the HAM unit design until BSC prototype fabrication costs are
confirmed controlled. Competitive bidding will be applied to all parts. Also,
the thermal straps and pod creaking redesign have been dropped, and the LIGO
Project will take over the UHV cleaning and reassembly of the BSC prototype.
Studies are continuing to confirm that funding exists to carry out this decision
prior to approving the start of BSC prototype fabrication.
Budgetary needs are being developed for FY05.
Actuators:
Kyle Ryan is nearly complete with the Thermal Vacuum test of the large actuator
at LHO. Preliminary results are within the range expected.
PSI is proceeding with fabricating the 6 large and 6 small actuators for the
BSC prototype structure.
Displacement Sensors:
ADE is proceeding with fabricating and testing the 14 displacement sensors for
the BSC prototype structure.
Accu-Glass is proceeding with fabricating and testing the 3 feedthrough flanges
for the BSC chamber at LASTI, with 16 feedthrough fittings each.
Seismometers:
Nothing new
Galling/Dusting Test:
Nothing new.
From: Janeen Romie <romie_j@ligo.caltech.edu>
AdLIGO Suspension
Hosted a set of meetings with Caroline Cantley, Helena Armandula and
Thomas Frey about the ribbon process design and the optic ribbon attachment
design. We will hold another scope meeting with Sheila Rowan on Friday.
Coordinated with Carol on the LASTI Planning meeting being held on Sept 1st.
Calum and I visited Valley Precision in
Calum and I coordinated with Brian Lantz and Norna Robertson for a visit to Stanford
on September 15th. We will discuss the possibility of the Caltech mode cleaner
triple going to Stanford for testing with the ETM Tech Demo. We will also be
discussing the quad structure design and requirements with Brian and Corwin.
Researching for Dave Hoyland from the
From: Helena Armandula <ahelena@ligo.caltech.edu>
Silica / sapphire silicate bonds
I exposed some previously bonded (in 2002) 1/2"dia. sapphire/silica
substrates to ~34 degrees C heat for 1 hr.
Immediately after removing the substrates from the oven, the bond's interface
showed stress. The amount of stress was very similar to the stress observed on
bonds between SF2 and fused silica substrates when exposed to the same
temperature for the same amount of time.
When the bonded substrates were removed from the oven and reached room
temperature, the stress at the substrate's interface disappeared.
Test results reported in T030046-00-D http://www.ligo.caltech.edu/docs/T/T030046-00.pdf
showed than when sapphire/fused silica bonds were exposed to 41 degrees C and
brought to room temperature, some of the stress still remained.
Sapphire/silica bonds exposed to greater temperatures, (60 -80 degrees C)
showed very noticeable permanent stress.
We may conclude that stress induced on sapphire / silica bonds by baking under
35 degrees C is reversible, however, noise issues associated with this effect
need to be assessed.
From: Riccardo
DeSalvo <desalvo@ligo.caltech.edu>
Juri
I used my Mathematica notebook to compute the electromagnetic
field across the mirrors of the Mexican Hat cavity where an initially
launched fundamental mode is
reflected back and forth between the misaligned mirrors until a steady-state
field distribution is obtained. Now I am changing the program in order to
obtain an animation with the dynamics of the field inside the cavity as the
beam bounces between the mirrors. I am analyzing the results to extract
information about the characteristic time of the cavity and on the minimum
number of rebounds to obtain a steady state.
Simone
Trying to improve the ohmic
contact of the electrode with the undoped silicon bar to produce
electropolishing on silicon.
Checked the behavior of Silicon under the light of a commercial laser [
< 5mW 650-680 nm], to try to overcome the problems due to the high
resistivity [330 K Ohm / cm] of the intrinsic Si.
Ordered some pieces at
machine shop to allign easily the flexjoint into the Q machine.
Received silicon flex joints
from Tom Pike at
Received mechanical
components to start testing the silicon flex joints.
Francesco
I have finally realised what
I was doing wrong with ANSYS and now it seems to work. I performed a
pre-stressed modal analysis with varying loads. For the flex joint modes we are
interested in the frequency now seem to be of the order of tens of KHz.
Maddalena
I'm just arrived from the
LSC meeting in
I'm continuing to write the
article on the subject of my master Thesis.
I'm continuing to take
Transfer function Measurement with lower gain in order to study the anomalies
of the system at lower frequencies.
Barbara:
I've finished to mount the
lens to match the injection beam to the cavity and I'm starting to align the
cavity.
Just using the micrometric
screws, the input beams and the reflected once are pretty close, I will start
to use the PZT to finish the alignment.
Obviously in the meantime I'm writing my thesis
For additional information about this report, contact whitcomb_s@ligo.caltech.edu