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The LIGO Executive Committee
Agenda for Monday September 11, 2000 will be:
(Meeting time: 10:30 am Pacific Time)
Open meeting 10:30 - 11:30
Special Items:
No report this week.
WBS 1.2 LIGO Operations--Administration
From: Ed Chargois <chargois_e@ligo.caltech.edu>
>From: Linda Turner - turner@ligo.caltech.edu>
Web pages for the DCC give simple how-to's for document numbering, easy access to the latest on-line documents, and search capabilities for the DCC database.Take a look. . .
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS
PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
Prepared distribution allocation for credit check from Demco, coordinated with the campus insurance office to meet the insurance requirements on the lease agreement for storage space in Livingston. Completed pending subcontract change orders, and placed credit card orders.
From: Florence Kaufman <fkaufman@ligo.caltech.edu>
From: irena@ligo.caltech.edu (Irena Petrac)
Dorothy Lloyd
Dorothy is on vacation.
Rita Torres
Progress Period from 9.1 to 9.7
Accomplishments:
The following change requests have
been submitted:
| CR-990028 | WBS 1.1.3 | Beam Tube Enclosure Closeout (return of unused funds) | F. Asirir |
| CR-000014 | WBS 1.2.1 | Additional Support Equipment for Commissioning | D. Shoemaker |
| CR-000015 | OPS | Repair of Road along Beam Tube Enclosures at Hanford | O. Matherny |
We have scheduled a meeting of the LIGO Change Control Board for 10:30 am (PDT), Tuesday, September 12, 2000.
Press for the latest Contingency Needs Projection.
From: Kris Duncan <kris@ligo.caltech.edu>
From: Irena Petrac <irena@ligo.caltech.edu>
No report this week. See above for Operations.
From: Ed Jasnow <jasnow@ligo.caltech.edu>
The Invitation for Bid for the Livingston Staging Building is undergoing
a thorough review before issuance. This will result in a delay of
one week.
General Items:
--------------
(F. Raab)
People are still working tasks where possible until installation can
restart. I will be moving people to new tasks to broaden the mix of skills
here.
Controls:
---------
(D. Barker)
Rolf and myself installed and tested the latest version of the DAQ
system recently at LHO. The
EPICS data collection unit has been ported onto a mv162, and no longer
writes into the DAQ
reflective memory network. The controller and switch units have been
combined into a single
baja. The EDU will run at 16Hz. Currently, due to the slow processor
speed, the mv162 can only
run the EDCU at 4Hz. This will be resolved by porting the EDCU onto
a
faster processor.
Alex and Hongyu ported the dataviewer, jdclient and matlabAPI to the
new
DAQ. These systems
are being tested at LHO and LLO.
I replaced hanford1 with a different enterprise 2 unit in an attempt
to
fix the SCSI problems seen
recently. Unfortunately the boot disk is still showing errors. If this
still prevents hanford1 from
backing up to tape drives, I will schedule a solaris upgrade and boot
disk replacement.
Ported our configuration control CVS from spica to ldas-sw as the
repository server.
Supported the new DAQ install and CDS updates at LLO last week. I
installed the autoburt backup
of all epics records on an hourly basis. This required installing the
saverestore facility to the
point where the request files were generated for the burt backup. The
LLO target upgrade
for saverestore will be completed at a later visit (requires target
renaming and rebooting).
Installed the automatic generation of the MEDM site overview screen
(updates every
10 minutes).
Consolidating recent CDS software changes within the CVS system.
Releasing the DAQ and ISC
software into the production areas. Upgrading the CDS RedBook to reflect
recent system changes
(the RedBook is the set of procedures for shutting down and rebooting
all CDS systems at the
observatories).
Building the LHO target database (an XML based system). Each target
entry shows information about
the target's name, ip, operating system, location, shutdown
instructions, dependencies with other
systems, etc. I will coordinate with LLO to get their target
database/RedBook updated.
OPTICS/COC/SEI INSTALLATION: We have completed the re-survey and re-alignment of all COC in the RC, and used the CAS in BSC-2 for the final positioning of the BS. The CAS misbehaved again, necessitating manual repositioning of the air bearings. Ken Mailand is now able to begin the repositioning of COS components, and we will assist him with this task. (Jonathan Kern)
CDS: The Livingston branch of CDS completed testing of the cryopump controls at the west end station last week. The pump reservoir is now full and PID tuning is in process. Training sessions for our operation specialists were held at the south end station. The alignment sensing and controls rack is still missing a couple of boards but all other internals are complete. In an effort to conform to our minimum traffic in the LVEA policy due to the doors being removed we are making distance measurements and will prep all the field cables in the OSB. Fabrication of the one arm test LSC cross connect is complete. General arrangement drawings for the latest LSC configuration have been received and fabrication is underway. Expecting a visit from Jay in two weeks for testing. The data acquisition system has undergone a complete overhaul this week and is being tested. This will enable us to continue our PEM audit including signal characterization. We have also received the hardware and software required to begin implementation our electronics configuration control plan. Completed wiring of 1X9 cross-connect. Received and installed replacement satellite amps at both end stations. (Rus Wooley)
General Computing: We are in the process of upgrading Sun workstations to Solaris 8.We have ordered a large disk for our PC server to help with backing up the PC files to tape. (Tom Evans)
PSL: The output beam alignment stability from the PMC was checked. As the looking point of the PZT was varied over its full 200 V range, the beam showed a displacement of a few microns. The stability of the beam over a 10 hour period was measured to be about 0.1 microns. (Joe Kovalik)
Vacuum Equipment: Y arm cryo pump has been tested and passed
for Ln2 level control. We replaced a faulty valve positioner from there
with the x arm corner station and have ordered a new one. Y arm end station
is under going leak test. (Allen Sibley)
Covered elsewhere.
Covered elsewhere.
| Installation
& Commissioning:
Livingston |
Other Science/Engineering
Activities:
Issues/Concerns |
See also the Installation web page
Bill Kells
Revving up on the current
"full" e2e version for LHO 2k modeling. Should be facile by next week.
Betsy Weaver, Doug Cook,
Larry Jones
Hung, balanced, and glued
ETMy optic; this will be ready for placing into the oven for baking tomorrow.
Joe Kovalik started work on the PSL section of an Operators' Manual. (Previously, a chapter template and 1st draft of the IO section had been written by Peter Saulson.)
Mark Coles, Rich Riesen, Rus Wooley, and Joe Kovalik have produced v1.0 of an Operator's Daily Task List. It contains a substantial list of checks for instrument status, health, and performance.
Preliminary results of a 24h data set show that the beam clearly drifts, but the magnitude is much less than 0.1 mm. One other noticeable effect is that the beam position changes slightly (15 micron at the monitor point, and this corresponds to a 35 x10^-6 rad angular shift of the beam directly out of the PMC) but clearly when the PMC is locked at different bias voltages. This could be a indication that either the PZT actuator tilts slightly as it moves along its axis, or the beam is not perfectly centered on the curved PZT mirror.
More details can be found in the elog.
The current MEDM PSL operator screens were installed. The default menu for pulling up the sitemap on the workstation inside the PSL Enclosure was modified to pull up the latest sitemap.adl, which in turn pulls up the latest PSL screens.
An AutoCAD layout of the PSL section of the IO/PSL table is near completion. The remaining things to be drawn are the holding forks, monitoring photodetectors and CCD cameras.
Rich Abbott
Completed the upgrade of
the frequency servo at LLO. The system now performs as well
as the two that were tested in the basement of Lauritson Lab. The
servo exhibits spontaneous locking characteristics without oscillatory
tendencies. The noise measured inside the loop is better than before
but awaits final comparison with the modecleaner derived signal.
We measure the Beam Splitter at 0 and 45 degrees incident angle. At 45 degrees incident angle there is significant turbulence in the beam path so the measurements can be hit and miss. Martin Stadnik, a SURF student, predicts ~ 4nm change in measured sag over the central 150 mm when comparing the 0 and 45 degree incidence measurements. This is based on modeling the effect of coating non-uniformity (as measured by CSIRO with elipsometry) on measurements at different incidence angles. Experiment bears this out, except that the sign is wrong. The experiment is consistent, so the guess is that there is some inconsistency in sign in the model. Once this is resolved we hope to argue that 0 degree measurements can be made on Beam Splitters, without the backup of 45 degree measurements.
Myron and Peter have also been experimenting with methods of attaching the glass filters to the ceramic boards. The idea of using a spring clip that is bonded to the board looks very attractive, and we are trying different spring materials and shapes. We are also running tests on variants of the original ceramic bonding of the filter.
Rebuilding LSC development system to make/test requested software changes.
No report.
No report.
Lock acquisition
Matt improved the lock acquisition logic, using the ratio of the error
signal and the transmitted power, instead of the error signal itself,
and the lock
acquisition time could be dramatically reduced, at least in the
simulation.
Biplab studied the effect of the mirror misalignment on the lock
acquisition.
A preliminary result shows the locking is not much affected is the
misalignment
angle is less than 5x10^-8.
Hanford 2K IFO model (Han2k)
Matt has made a detailed model the Hanford 2K IFO system, for now
focusing
on the length locking. e2e has been improved to support macro data
file.
Han2k has been modified to use the macro data base, so that physics
parameters
can be easily modified. The document, "End User's manual" is now being
prepared
so that anyone interested in using Han2k can use the program.
Stack model
Biplab made HAM and BSC stack model based on the Ed Daw's fitting of
the
transfer function. Now, in e2e, 6x6 transfer function of the two stacks
can be simulated.
Suspension model document
Malik started to write a LIGO document about the basics of the LIGO
suspension
system. This will cover the basic formulation of the dynamics, analytic
solutions,
simulations, measurements, etc. A preliminary discussion of the context
has
started among the authors, Malik, D. Tanner and Hiro.
Alfi
A multi line editor is integrated in alfi. This enables editing of
settings
consisted of long strings, like a long list of zeros and poles of a
digital
filter.
Ed is working on a major improvement of the graphics rendering.
Other bug fixing are going on as well.
Installation document
Ed is working on the document how to install the e2e related softwares.
New programmer joined
A new programmer, Ottavio D'angelis, has arrived. He is going to work
mainly on the improvement of the simulation code.
Software Systems (Blackburn)
The visits made by B.S. Sathyaprakash and Sanjeev Durandur harvested
two interesting results for LIGO Data Analysis. Sathya was able to
demonstrate a 5X speed up in the computation time for templates and
Sanjeev was able to formally show a ~10x speed up for hierarchical
searches by including the time dimension in the hierarchy. The hierarchical
search would take place over data corasely sampled in the postNewtonian time parameters and
the time itself. Both methods for improving the
computational performance are still under development but demostrate
the protential for performance boost that new thinking on the binary
inspiral search can still bare. Saytha submitted a LIGO technical
document on his results which can be found in the DCC.The dataconditionAPI was found to have new (at least previously
unknown) memory leaks this week. It has not been determined yet
if these are in the C++ shared object or in the TCL code managing
the shared object. The dataConditionAPI also appears to have cases
where failed attempts to allocate memory are not being trapped which
causes ill defined behavior for larger data sets. Attempts to track
these bugs with a debugger have not been succcessful, though we were
able to attach a debugger late last week.The build instructions and process are now being exercised on a
linux workstation which was wiped clean to provide a common starting
point for members of the LSC that may desire to build LDAS. This
has identified may shortcomings in our instructions and will make
the process go smoother for those less familiar with the environment.
Along these lines, UWM now has a full build of LDAS on their Alpha
systems. They have yet to test the LDAS there but plan to do so soon.
The next effort in this exercise will be to develop the necessary
instruction to be able to run LDAS on systems outside of the target
environments found in LIGO. This has already been accomplished at
UTB by Joe Romano, but instructions for the procedure are not spelled
out yet.MPICH has pre-released a new version to us (thanks to the contributions
that Masha Barnes made to that consortium). This release is reported to
have several fixes to the MPI 2.0 C++ exception handling which will be
tremendously valuable to the LDAS wrapperAPI. The pre-release is some-
what immature, lacking bullet proof installation procedures. We are now
working with NDU to sort out the build process so that we can test the
new release.The version of GCC that we are using in LDAS seems to be very sensitive
to options associated with thread safty and memory allocation at the
time that GCC itself is compiled. This effects the behavior of code that
is compiled with GCC and produced several problems with LDAS execution.
We are looking into the best set of options to allow thread safty in
the standard library and the LDAS modules.Lazzarini and Blackburn will have a weekend meeting with UWM principals in the MPI
search code MDC development to (hopefully) resolve several issues associated with the interface definition between
LSC-provided LAL C code and LDAS-provided C++ code.
Hardware Systems (Anderson)
A final selection for the next LDAS development beowulf system at Caltech
has been made: 16 933MHz PIII PCs.Arrangements with CACR have been made for terminating the new single mode
fibre runs needed for the LDAS Gigabit Ethernet data analysis network
at Caltech.The Sun HPSS performance testing for September has been postponed to
after SC2000 (early Nov) where Sun will have an E4500 demo system running,
and after the official Sun supported release (v4.2) scheduled for Nov 30.The LIGO data archive at Caltech is currently unavailable due to a
prolonged software upgrade at CACR, for updates and announcement of
availability, see, http://www.srl.caltech.edu/personnel/sba/ligo/hpssA major upgrade of the LDAS system at LLO has been scheduled for
the last week in September.The upgrade of all LDAS systems from Solaris 7 to Solaris 8 is proceeding
without any major problems encountered yet.
Data Analysis Activities
LIGO-SNEWS (Szabolcs Marka):
Please visit our homepage at: http://www.ligo.caltech.edu/~smarka/SN/
You can sign up to receive the alarm. (We will redistribute SNEWS/GCN
and ultimately LIGO alarms after the testing phase.) E-mail enabled cell
phones, pagers and other handheld devices are OK.
The first version of the alarm receiver/distributor code is being tested
for durability and stability.
Benoit Mours (VIRGO) joined the project and work with us during the
crucial development phase.Benoit Mours:
Studying a technique to generate a reduced data set for production:
started to work on the construction of a chisquare metric to describe
the power spectrum stability of monitoring channels.
MIT:
Some minor changes to e-mail. Still some people are have a few problems
that may
need to be worked on.
Livingston:
Nothing to report.
Hanford:
Nothing to report.
CIT:
(Barbara)
- Made another round of changes to the roster database for Advanced
LIGO
and for contractors appearing on the LSC roster.
- Continued efforts on the LDAS Equipment Inventory web forms and database.
Add and edit forms are finished. The Search/Display forms are
just about
complete. Only delete forms and reports remain.
- Finally found the secret trick for transmitting the Real media files
via
FTP to Eric at Hytec.
- Added the roster databases to the TimeTarget backups.
- Researched a problem with the weekly compact/repair process for the
DCC
databases.
- Installed the summer edition of the newsletter. Made other
quick web
site changes.
(Sam)
- Did everything possible to make Rich Abbott's PC happy
- Rebuilt two machines, including imaging them
- Answered many pc related questions, most interesting of which was
how to
connect two PC's into one
- Burned CDs
- Worked on Backups a bit (I helped change tapes)
- Looked into purchasing camera and microphone
- Tons of physical therapy.
- Playing with office2000 trying to figure out how it will work with
old
documents and with Staroffice.
(Lisa)
- Finished monthly backups
- Diagnosed a hardware problem in Rich Abbott's PC. Sam helped
out on this.
She did a great job in helping to pin this down.
- Working with Ed Chargois on getting equipment surplus out of Wilson
House
- Putting together a Req for upgrading our modem pool
- Worked on making VME crates boot off luna. I added an entry
to the FAQ that
is a list of things that need to be in place in order to support the
VME crates.
This is a critical step in the decommission of kater.
-Pushed out a couple more Ultra 10's. I added an entry to the
FAQ that is a
step by step on how to build the new workstations.
- Started working on getting the IC package of Cadence running.
I borrowed a
Cadence Design Kit and some sample setup files to make this move along
quicker.
(Suresh)
- Installed and configured Solaris 8 and staroffice software packages
in four
new Sun Ultra 10 systems.
- Worked with Larry to provide two 115 subnet connections to 40 Meter
Lab. Took
out unneeded fiber cables from network closet.
- Made a tape backup of /usr3 partition of Janeen's machine (mintaka)
before
replacing this with a Ultra 10 system. Replaced Drum kit for color
printer in
Millikan 6th floor.
- Set up two new users accounts.
(Larry)
- Worked through a number of procurements and have put in the paperwork
for a
couple of the SUN maint. contracts. As a side note the SUN 450 units
that were
recently purchased have a three year warranty.
- Purchased a number of PC's to upgrade some of the DCC equipment and
more
laptops for travel.
- Worked the the 40M group to get a few network problems resolved.
It appears
that a couple of fibers may have been damaged during the move. We have
worked
around them but will still get them checked out to see if they can
be repaired.
- Generating another list of equipment to be turned over to Caltech.
- Working on new installations of both SUN boxes and PC's.
From: Bill Kells <kells@ligo.caltech.edu>
1. Running MELODY through its paces, trying to get a basic
run equivalent to a basic FFT config. Already have ferreted
out bugs in Melody: probably minor wrt LIGO II designing.
2. Ongoing (with Jordan in OTF) investigation of coated m-axis
Sapphire: are the mirrors birefringent?
.
4. Consulting on 40m upgrade issues.
5. Consulting on LIGO II COC issues.
6. 40m recycling paper.
Sender: smith@acrux.ligo.caltech.edu
LIGO 2
A preliminary draft of the AOS DRD was completed and was sent to the other AOS subsystem designers for review and updating.
From: Peter King <pking@ligo.caltech.edu>
LIGO II PSL
The quotation that I was
waiting for has finally come in. This
should permit me to proceed with the cost estimation for the opto-mechanical
parts of the PSL.
From: Janeen Hazel Romie <romie_j@ligo.caltech.edu>
Working with Alan W. on 40m suspensions
requirements. Working on Advanced
LIGO costs.
From: GariLynn Billingsley <Billingsley_G@ligo.caltech.edu>
Specs for Pathfinder IIA (the 150mm dia sapphire blanks) were completed and circulated for comment. Comments are requested by 9-8. Assuming no major changes, these will be sent to GO and CSIRO for quotes. For the time being we have settled on a sag tolerance of ±10 nm for our pathfinder and advanced LIGO estimating. Check out the design baseline (as of this writing)for the advanced LIGO optic specs.
From: Helena Armandula <ahelena@ligo.caltech.edu>
Subject: Silica Bonding
We tested bonds made with substrates cleaned with calcium carbonate;
compared their strenght with substrates cleaned with Liquinox and with
the original bonds made at Stanford were the surfaces were not previously
cleaned or just wiped with methanol.
The test's results showed that bonds made on substrates aggressively
cleaned,(water wets the surface), are more robust.
The results obtained compare closely with J. Gwo's reports.
From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>
>From next week we move from the larger meeting room to the smaller
one
(just next to it).
Next week I will be in Japan to study feasibility of Cryogenic Thermal
Noise Interferometer, Virginio will hold the meeting.
Alessandro
Writing thesis
Shipping accelerometer aluminium mark 2 with electronics
Giancarlo
Simulations finally converged with agreement between simulation and
prototypes.
Akiteru, Szabi
Reconstructed IP with 7.6 mm flex joint, started measuring transfer
function.
Needed wider holes on IP bases to allow perfect alignment of legs
parallelism.
Oil bearing now perfect but below 500 mHz problems with directional
guide stiction.
Need to coil actuator coils soon.
Virginio, (Stanga, Giovanni)
Closed all accelerometer loops for inertial damping. No LVDT
integration yet, slow drift of system. Instability at high gain and
low
frequency, hit walls in 120 seconds.
Need better low frequency characterisation and diagonalisation matrix
and merge in LVDTs.
DSP runs OK without crashes.
Francesco
Calibrated Aesmart amplifiers with 50 and 500 KHz pulse bursts 50 cycles
long.
r.t.= burst length, f.t. = 1 ms on both HF and LF channels.
Loaded blade over week end and listened to acoustic noise.
60Kevents of which 300 compatible with acoustic emission in 5 days.
To
be analysed.
Add load to watch acoustic emission increase.
Measured anticorrelation of creep oven internal and external
temperatures, definitely need temperature controller in auxiliary
stabilized box. Reconnecting LVDTs to readout.
For additional information about this report, contact sanders@ligo.caltech.edu