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The LIGO Executive Committee
Agenda for Monday June 5, 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
Work continues on the creation of a 501(c)(3) non-profit corporation in Livingston to allow for the receipt of donations for outreach activities. Discussion is revolving around he composition of a board of directors.
PROPERTY MANAGEMENT (Chargois)
From: Ed Chargois <chargois_e@ligo.caltech.edu>
Assisted the Detector Group (M. Smith) with the packing and shipping of APS Telescope and Pick Off Telescope Hardware to the LIGO Livingston Observatory(J. Kern) account number 5F515.
Assisted the Project Administration Office (G. Salone) with the packing and shipping of a excess computer card to Nelles Griot Photonic Components Div. (S. Renadonaldo) account number P158117.
Completed the Hanford Surplus Equipment Transaction with the National Science Foundation and the General Services Administration. Arranging removal transportation for the equipment to Department Of Enengy located at Hanford WA.
Arranged transportation though United Motor Freight for pick-up and delivery of a Vehicle (Cherry Picker) from Edwards Air Force Base Ca. To LIGO Livingston Observatory, expected arrival date 6-5-00.
DOCUMENT CONTROL
CENTER (Turner, Mak)
| Packages | Faxes | |
| In | 37 | 49 |
| Out | 10 | 49 |
Special Projects/notable activities: Electronic docs continue to roll in as usual and I'm trying to keep current with them but am running into a few bumps along the way in processing them completely.
NOTE: I will not be in the office next Friday, June 9th. With Linda being out on medical leave, the DCC will be closed for the day. I apologize for any inconveniences it may cause.
Press here to access the DOCUMENT CONTROL CENTER WEB PAGE.
COST SCHEDULE CONTROL SYSTEMS (Cunningham, Brambila, Akutagawa, Kaufman)
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS
PAYABLE HISTORY DATA.
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From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
Triad change orders 49 & 50 went in yesterday along with an internal mod to transfer avail funds of $309,900.49 from 5N500-2.9 to 1.5.1. I will be submitting the paperwork for signatures and distribution today. Still need to work with Florence to make the transfer to 1.4.1 and to resolve the difference of $18k.
Working on finishing up some pending change orders to Promec, Demco, et al.
Compiled and submitted the comprehensive list of LIGO subcontracts for the DCAA auditors which was due Tuesday, May 30th.
Have a list of po's to be checked into and closed out. I will start this once I complete the pending change orders.
From: Florence Kaufman <fkaufman@ligo.caltech.edu>
For a listing of the FY 2000 POETA Accounts see
http://docuserv.ligo.caltech.edu/docuserv/home/accts_ops.pdf
http://docuserv.ligo.caltech.edu/docuserv/home/accts_adv.pdf
Continue to reviewed the open encumbrances on the Construction and Advanced R&D accounts to see if the requested removals have been made. I will continue to review these accounts weekly until all encumbrances have been removed.
Discoverer has been installed on my PC and I am learning how to use it.
SUBCONTRACTS MANAGEMENT (Petrac, Jasnow)
Galli&Morelli: CO#10, adding $50 for additional LIGO Seismic Isolation prototype components, was released to the CIT Acquisition.
Univ. of Florida: CO#9, incorporating D. Reitze's research at LLO, is in Detector Group review.
Support (Wood)
Dorothy Lloyd
On vacation this week.
Irene Baldon
Worked on preparing the paper work for 7 new trips taken recently or upcoming (7 Payment Requests and 1 Advance Requests). There are approximately an additional 8 new trips in various stages pending completion of travel arrangements before the paper work can be completed.
I have completed most of the travel arrangements needed for 23 incoming SURF students, some of which will be coming from Europe. We have 14 students coming to LIGO/Caltech, 3 will be going to LIGO/Hanford, and 6 will go to LIGO/Livingston. I have ticketed some of them and will continue to push the others so that I can get the best possible fares. We have 1 student coming from Warsaw who required an additional Visa so that he could layover in Zurich for 1 night. This has been accomplished and all is in place.
Completed 28 Expense Reports. There are 23 Expense Reports still to be done. I'm holding 2 completed Expense Reports which require a check from the Traveler before sending to Travel Audit to clear.
Rita continues to try to fit into her schedule some time for travel. She has completed 12 Expense Reports this past week.
Gary Sanders, Ed Jasnow and I attended a meeting on the use of P-Cards for Travel on Thursday, May 25th, with Caltech's new Controller, Al Horvath, Wayne Morales, Supervisor of Travel Audit, Michelle Thompson, Manager of Accounts Payable, and Criselda Rodriquez-Brodeur, P-Card Administrator. We feel that our presentation went very well and that we should know something more definitive in the next week or so.
Prepared the Travel/Vacation Itinerary for the Week of May 30, 2000.
Rita Torres
While D. Lloyd is on vacation, I'm obtaining Oracle numbers for requisitions; about a dozen to date. Will continue until Dorothy returns.
Scanned signed documents to be posted on the web page for LSC/MOUs. Did edits to progress report for Wisconsin-Milwaukee, sent to the DCC for posting on the web. Prepared for close out file with Senior Flexonics. For S. Whitcomb distributed an article to the science group, also updated the distribution list.
Spent some time on travel documents. Site trip updates. P-card activities, the usual invoice chasing, and reconciling.
Elizabeth K. Wood
Did a lot of last minute planning for Kipfest. Currently, I’m in the midst of Kipfest.
Progress Period from 5.26 to 6.1
Accomplishments:
WBS 1.4.1.2 Project Controls (LIGO Construction)
COST SCHEDULE CONTROL SYSTEMS (Duncan, Akutagawa)
From: Kris Duncan <kris@ligo.caltech.edu>
Calculated and posted updated earned value status for month end April 2000 CSSR. Corrected invalid estimate dates in COBRA and began work on May 2000 reports.
Continued with construction contract close out.
Continued work on the update of the Construction Responsibility Assignment
Matrix (RAM) for month end May 2000.
Continued to rework the Performance Measurement Baseline (PMB) including removing the change request for Floor Covering ($70K) from 5D532 and the LDAS accounts.
No report this week.
Announcements:
--------------
(F. Raab)
Having closed up the 2K interferometer and pumped down last week, work that has been waiting for time to do it is getting attention this week. Most of it is not very newsworthy, but it will help us in later phases of installation and commissioning. Next week the resilient flooring installation will begin, starting on Tuesday.
Seismic Systems:
----------------------
H.Radkins, C.Gray, M.Guenther
We have completed the design and are finishing the ordering of the parts to implement the Coarse Actuation System (CAS) for the 4K IFO. This consists of air line fittings, regulators, and filters. The installation of the 4K CAS cabling is beginning.
We are 'shaking' down the system we will use to measure the In-Vacuum Seismic Isolation tranfer function. The hardware is in place and we are determining the amount of shaking needed for good data.
Tiltmeters are being calibrated and temperature affects are being studied.
It seems the tiltmeter is affected by temperature more than just in the
sensor. More later.
Commissioning Activities: We checked the calibration of the VCO in order to measure the frequency noise of the laser. We then measured the frequency noise of the laser and saw a great deal of acoustic coupling. We will investigate various options for reducing the acoustic noise in the PSL enclosure room during the installation period. We will also change some optical mounts and should then be less sensitive to acoustic noise. (For example, the tall mounts for the periscope into the reference cavity are very sensitive to acousitic coupling.) We are also preparing to measure correlations between seismic noise, output beam jitter and the signal ouitputs from the OSEMs designated Pitch, Yaw, Pos and Side. (Joe Kovalik et al)
With Anthony Rizzi I set up and aligned optics (except for wavefront sensors) on ISCT1. While doing this we found that the high voltage cable for the EO shutter had a bad contact at the Pockels cell's connector (the EO shutter consists of a Pockels cell and a polarizer). We fixed this and the EO shutter worked well (extinction ratio of 300). This solved the problem that we had in the EO shutter (that uses the same cable) on IOT1, i.e., the EO shutter had hysteresis, it opens suddenly at a voltage when the applied voltage was increased (rather than the transmission gradually increases as the voltage increases). We (Gary Traylor, Joe Hanson, and myself) continued preparing spare optics for those SOS that have too large balancing angle error. We have cleaned the optics and made four sets of magnet-dumbbell combinations and glued a wire standoff and a guide rod to MMC2. (Sany Yoshida)
OPTICS: We're gearing up for the vertex installation beginning next week. The final load of COS components will be placed in the bake oven tomorrow. We've received assembly drawings from Mike Smith for the IO baffle, as well as the arm cavity baffles and we'll begin assembly of them next week. Staging and separation of installed components is ongoing. (Jonathan Kern)
Other: Shannon Roddy has recently joined the computing staff at Livingston,
and will be assisting with system and network administration. Prof. Mario
Diaz from Univ. of Texas at Brownsville has arrived at LLO for a one month
stay.
All MIT activity reported in other categories.
All CIT activity reported in other categories.
| Installation
& Commissioning:
Livingston |
Other Science/Engineering
Activities:
Issues/Concerns |
See also the Installation web page
The modecleaner was successfully locked without the laser oscillating. Although sometimes when the modecleaner was swinging through several fringes the laser would break into oscillation and automatically recover after a few seconds. For the times that the laser failed to recover automatically, the oscillation could be halted by lowering the servo's common gain. Raising the gain afterwards does not cause the laser to oscillate. Perhaps the strategy for locking the modecleaner might be to lock the modecleaner with a low common gain on the frequency servo and once the modecleaner is locked, to increase the frequency servo to its full bandwidth.
The modulation for the pre-modecleaner (PMC) has been adjusted to give a discriminator slope similar to that used when the PSL was installed. The light level on the rf photodetector was adjusted to give 1.36 V DC on the photodetector when the PMC was unlocked. At present there seems to be a problem with the PMC servo card, where the mixer offset cannot be compensated for by the input offset adjust (a problem that was fixed earlier by Peter Fritchel when some other modifications to the PMC servo were made --- I believe). This limits the u.g.f of the servo to around 200 Hz for a servo gain of 10 dB. Why the problem has re-occurred isn't clear. It is possible that the AD602 has gone awry again, for some reason.
The beam alignment into the PMC has been tweaked up. When the new PMC was installed, the transmission voltage was ~1.3 V. Over the three or so weeks after installation, the transmission voltage decreased to ~1.2 for the same incident laser power. It is suspected that the mirror mounts on the main beam periscope drifted. The mounts may have settled, since the PMC transmission has been ~1.3 V since Saturday.
The transfer function for the recently modified current shunt has been measured. The gain response is essentially flat from 1 Hz to 1 kHz. The shunt was used to stabilize the intensity, initially with an SR560 with a gain of 5000 (intensity spectrum plot) and with a gain of 10000 (intensity spectrum plot). A line at -120 dB represents the PSL intensity stabilization requirement before the modecleaner. The photodetector used was located after the PMC.
Laser power supply #107 has
been returned to Lightwave for repair. Lightwave have changed their return
policy. Previously we could get an RMA from our "contact" in Lightwave
but now all RMAs are handled by Lightwave's central service desk.
The cause for the power supply's demise isn't known.
WA 2K LSC (Jay competed the WA 2km LSC rack wiring diagrams and the cross connect lists have been sent to LHO for fab. (The 40 meter team saved the day by allowing us to borrow cross connect blocks for the fabrication when our shipment was delayed.)
Dale Ouimette, Rolf Bork and Flavio Nocero will be at Hanford starting the week of 6/12 to start the installation and test of the LSC digital controls. Peter Fritchel will be at Hanford 6/8-15 and Mike Zucker he week of 6/19 as well to assist.
We calibrated the VCO drive (120.5 kHz/Volt), and as a result were able to produce a calibrated spectrum of the frequency noise of the LLO PSL. It looks almost identical to the spectrum of the LHO PSL, as presented by Peter King at the 1st Director's Review.
We examined the dependence of the PSL's frequency noise on the acoustic noise that impinges on it. >From 200 Hz to 1 kHz, the noise is dominated by a forest of resonant peaks, driven by acoustic noise. By turning off nearly all of the fans in the PSL room, we were able to reduce the excess noise in this spectral region by around a factor of 3.
We also created a catalog of spectra associated with different components on the PSL table. While different components exhibit different acoustic fingerprints, many have fundamental frequencies in the 100 - 300 Hz range, and some show substantial excitations well above 1 kHz when tapped with the yellow plastic handle of a screwdriver. We are thinking of ways to make this measurement in a more calibrated way, so that it will be easier to compare with the (hopefully) much more rigid mirror mounts designed by Jonathan Kern and Joe Lacour. We will be able to try them during the upcoming vent (or perhaps during the first half of next week.)
We are about to start on another attempt to account for the beam jitter noise, by comparing the beam jitter signal (measured with a quad diode on a sample of the transmitted light) with the pitch and yaw signals derived from the OSEMS on MC1 and MC2. Previously, we had only compared with individual OSEM outputs.
Matt and Luca have been working on an e2e model for the recycled michelson configuration. This model is ready to be used to study Matt's scheme for lock acquisition. The mirrors' angular degrees of freedom will also be implemented.
N.B.: Matt's C-code is written for direct implementation on the real-time VME processors. It has wrappers for integration into the E2E simulation code so that we can be assured that the simulation and the instrument are running the same code. Well done! (Dennis Coyne)
No report this week.
This week we aligned our suspended mode cleaner to an auxiliary He-Ne
laser
with the earthquake stops removed. One of our mirrors goes into
oscillation when the local damping is turned on (which it didn't do
when we
clamped the mirrors down a few weeks ago, odd!), so we will have to
fix
that before we can complete the alignment to our NPRO. We expect
to have
that problem solved by Thursday evening (June 1), and final alignment
completed sometime Friday.
If all goes well, we should be able to attempt lock acquisition next week.
Vacuum system:
Continuing characterization of outgassing loads and system performance.
Operating pressure is now below 1e-6 torr, dominated by water vapor.
Water flux after 1500 hours under vacuum corresponds to a surface rate
of approximately 5e-11 torr-liter/s/cm^2 (high by LHO/LLO standards
but adequate). Hydrogen rate is about 1.5e-11 torr-liter/s/cm^2.
We
found evidence of a substantial air leak (about 1e-5 torr-liter/s)
which we believe we've isolated
to a particular fitting we added before the pumpdown. We will need
to
fix this before proceeding with annulus tests.
Lock Acquisition
Matt Evans and Luca Matone have been working on an e2e model for the
recycled michelson configuration. This model is ready to be used to
study Matt's scheme for lock acquisition. The mirrors' angular degrees
of
freedom will also be implemented.
During the simulation, a bug of the code was found related to handling
the misalignment of mirrors. Biplab is working to fix it. During this
study, Biplab found a trick to speed up the calculation by a big amount
(factor ~2) by taking advantage of the fact that the LIGO Michelson
is
a low finess cavity and the number of bounces in the summation cavity
is around 100.
RSE
Matt Evans has studied the RSE error signals for locking the optics
system.
He is studying the generality of his method.
STL-based version
Hiro is concentrating to convert the simulation code to the one using
STL.
This is expected to boost the speed by 50-100%.
DEC-ALPHA
Ed Maros is trying to compile the simulation code using the compiler
released by DEC to see how it can improve the simulation speed
compared to gnu compiler.
alfi
alfi4 beta is being used by e2e users at Caltech. Bruce Sears is
debugging
the code related to tracing the modification status of the files.
The memory leaks that were tracked down within the FrameAPI's
Tcl layer last week are being plugged using a new attribute to
the LDAS Internal Light Weight Data format. This new attribute
is called jobid and allows the glue layer to keep track of the
objects associated with each request to the LDAS system. It is
also expected to clean up the problems that we have had with
some threaded code hanging up since these hang ups were associated
with using the Tcl vwait command which will not be needed now
that we have the jobid attribure.
A model developed over the last week for generating sequences of
filtering methods on data within the dataConditionAPI. It uses
two new classes, one which will build a stack of processes to
perform on the data and a second to execute the stack of processes
within a thread.
The LDAS databases here at CIT and at the sites were copied over
to a new instance user this week. This is to make the DB2 user
environment more symmetric everywhere.
The MPI code has now matured to the point where tests are likely
to begin by early to mid next week to integrate the wrapperAPI
with the mpiAPI in the LDAS system. We also now have two visitors
from UWM with us here at CIT working on the LAL dynamically loaded
shared object libraries that will be loaded by the wrapperAPI.
We will be working together for the next month to actually carry
out tests of the parallel LDAS code and its integration with
LSC developed search algorithms.
Anderson:
Continued testing of Foundry Networks gigabit switches and Sun fibre
channel
RAID system.
Installation of Solaris 8 and latest Sun C++ compiler (Forte 6.0)
on loaner E450 to test LDAS software.
Lazzarini: Attended a meeting at NSF with the GriPhyN principals to
present the project concept to NSF management and to discuss how the
nascent ITR effort can grwo into the required hardware+personnel
support needed to create the GriPhyN infrastructure.
MIT:
Increased the amount of disk space on the main user server. Went over
some of the plans for upgrading the systems and configuration changes.
Larry has been working on installing and upgrading a few of the programs
on the server.
Livingston:
Nothing to report.
Hanford:
Nothing to report.
CIT:
Surresh is wrapping up the backups for the month. Working on s/w
installations for laptops that have been purchased for travel usage.
We
hope to have two high-end laptops that will be available for those
that
will need them for travel (people that don't travel a lot).
Waiting for SUN to approve our special educational discount on a fairly
large order.
Working on the GC plans for computing needs and usager for the next
year.
Testing out the DSL and cable modem connections to work out the logistics
for future installations and usage.
From: GariLynn Billingsley <Billingsley_G@ligo.caltech.edu>
Veeco now has an approach to our request for a metrology upgrade quote,
in
summary Erik Novak writes: "...we are going to quote the separated,
incoherent laser as an upgrade. However, most of the other requests
would
require extensive modifications to the system base plate and are not
really
feasible as an upgrade, but rather would be part of a separate system.
" The laser upgrade alone could significantly improve the vibration
environment on the table. The quote is promised by June 7.
From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>
Riccardo
Taken delivery in Caltech of the prototypeTAMA tower. Everything
ready
to rev up and validate the design next week. The target
is to
terminate validation in the next two weeks as in the test programme
of
last weekly.
Szabi came back today from Livingston. Virginio will arrive within
a
couple of days, Lisa, Kenji and Tatsuo will arrive on Sunday.
Alessandro
Production of accelerometer with updated design ongoing, G&M expect
production in two weeks, validation from Ale should follow in another
week, By end of June we should start up the first serie production,
six
for TAMA, three for the IP, two for the Szabi’s seismic station, one
spare. E.t.a. beginning August.
Improved capacitive readout.
Alessandro, Francesconi
Cleaning up accelerometer readout circuitry.
Hareem, Soy
Precision measurement of GASF thermal drift in different working points
ongoing. Search of a temperature insensitive working point for
a
possible vertical accelerometer.
Soy
Made LVDT coils.
Virginio
Still abroad. Good echoes from the Elba conference.
Akiteru, Hareem
Got accelerometer mark 1 working on IP, found a problem with a switch
that wasted almost a week; characterisation started.
Hareem.
Finishing oil bearing improvements.
G&M, PROMEC
Expo with SAS components at the industrial section of Elba conference.
For additional information about this report, contact sanders@ligo.caltech.edu