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The LIGO Executive Committee
Agenda for Monday May 8, 2000 will be:
(Meeting time: 10:30 am Pacific Time)
Open meeting 10:30 - 11:30
Special Items: Operations budgets review
No report this week
WBS 1.2 LIGO Operations--Administration
From: Ed Chargois <chargois_e@ligo.caltech.edu>
I attended a meeting at the Department Of Energy/Hanford Works with the Chief of Property Management (Nancy Sitton) located in Richland, WA. The purpose of this meeting was to establish a local "point of contact" to dispose of surplus property accumulated at the LIGO Hanford Observatory, (without paying a costly sum to transport the surplus equipment to the Defense Reutilization Material Office (DRMO) at Fort Lewis WA). The DOE will accept these items with proper release documentation (Standard Form 120) approved by the National Science Foundation..
| Packages | Faxes | |
| In | 32 | 38 |
| Out | 10 | 48 |
Special Projects: A large volume of electronic documents.
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
http://docuserv.ligo.caltech.edu/docuserv/home/accts_ops.pdf
http://docuserv.ligo.caltech.edu/docuserv/home/accts_adv.pdf
No report this week (vacation).
Dorothy Lloyd
Began reviewing old purchase orders that are complete, but remain encumbered dating as far back as 1995. It appears that in some cases we were never invoiced (maybe items were returned without my knowledge). In other cases, we were invoiced for less than the PO total (discounts, items returned and/or replaced at lower cost, etc.). I have begun pulling these and adjusting the LIGO database accordingly, and will forward them on to Ruth to "close out" and remove the encumbrances.
Processing requisitions, invoices and receiving on-line continues. For more detail see "Cost Schedule Control Systems" report by Esther Cunningham.
Tracked and follow up on invoice problems.
Continue to monitor contract and blanket order funding levels and alerted task managers when supplements need to be made.
Reviewed payments processed by Esther during the week of April 24. Payments were entered in contract summary sheets and the LIGO database.
Updating PO Log Books continues.
Irene Baldon
This report covers a couple of days before my vacation and the week since my return.
Worked on preparing the paper work for 27 new trips taken recently or upcoming (27 Payment Requests and 18 Advance Requests). There are approximately an additional 15 new trips in various stages pending completion of travel arrangements before the paper work can be completed.
I also have the travel arrangements to be made for 23 incoming SURF students, some of which will be coming from Europe. We have 14 students coming to LIGO/Caltech, 3 students will be going to LIGO/Hanford, and 6 student will go to LIGO/Livingston. I have been able to start on some of them and will continue to push the others so that I can get the best possible fares.
Completed 42 Expense Reports, some of which were extensive, involving 2-3 or more pages each. There are 37 Expense Reports still to be done. I'm holding 1 completed Expense Reports which requires 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 6 Expense Reports to be done at the present time. She also completed 7 Expense Reports last week.
Performed normal recording and filing associated with Travel and Reimbursement. Continued to research several items for Travel Audit in regards to Encumbrances not removed from Travelers records. Will continue to work with Travel Audit on this ongoing problem.
Prepared the Travel/Vacation Itinerary for the Week of May 1, 2000.
Rita Torres
Formatted incoming Stanford progress report, sent to DCC to be posted on the MOU/LSC web page. Continued to coordinate food arrangements for the 5/8-5/11 NSF review; lots of follow-up phone calls. SEI drawings: compared list with a stack submitted by M. Fine, added to list the missing drawings. Handed revised list to F. Asiri; project on-going.
Obtained Oracle requisition numbers. Spent more time on Expense Reports. P-card activities, the usual chase of invoice information.
INFORMATION - Reminder. "Graphic Arts MAY Special Color copies at Caltech Graphic Arts are $.75, each & every Wednesday in the month of May! This offer applies to all orders we receive during our business hours for 8 1/2 X 11, single-sided, regular stock copies."
Details: http://atcaltech.caltech.edu/news/item.tcl?news_id=1228
Elizabeth K. Wood
Continued preparations for the NSF site review. Thanks again to Rita and Irene.
Did a lot of personnel-related work.
Progress Period from 4.28 to 5.4
Accomplishments:
We are preparing a schedule for the support that is going to be required for proposals, work plans, and reports for the last half of FY 2000. Clearly there is a lot of information needed, and there is a lot of overlap in the schedules that will have to be spread out given limited resources. Material for the End of May Quarterly Report is hereby requested by Friday, June 9. Thanks!
The following change requests have
been submitted:
| CR-990028 | WBS 1.1.3 | Beam Tube Enclosure Closeout | F. Asiri |
| CR-000005 | WBS 1.2.1 | Upgrade Pre-stabilized Laser | S. Whitcomb |
| CR-000006 | WBS 1.2.1 | Re-polish Core Optics Components | S. Whitcomb |
Press for the latest Contingency Needs Projection.
From: Kris Duncan <kris@ligo.caltech.edu>
No report this week.
Announcements:
--------------
(F. Raab)
We now have a new web page to keep up with LHO activities, called "This
Week at LIGO Hanford Observatory" ( http://www.ligo-wa.caltech.edu/thisweek.html
). We will try to keep it up to date.
Last week, there was no LHO weekly due to "Operator Error" on my part.
This error is all the more egregious because I was to announce that ALL
LIGO-1 SEI CONSTRUCTION HAS BEEN SUCCESSFULLY COMPLETED. It looks
like "test and trim" from here on out on seismic work.
A disturbing discovery was made during mod's to the 2K mode cleaner.
See contamination report, below.
Tom Mahood will join the LHO staff on May 22.
Tom comes to us from Cal. State. Fullerton where he worked on torsion-balance
experiments for his masters thesis.
Bake Oven:
----------
(K. Ryan)
LHO Vacuum Bake Oven A load #88, consisting of HAM 6, 12 and BSC 4 purge
air hardware and Mike Zucker's view ports was released Tuesday 4.25.00.
Load #89, consisting of 2K and 4K LHO and LLO HAM Beam Dump assemblies,
was released on Tuesday 5.2.00.
Load #90, consisting of Arm Cavity Baffle parts, is vacuum baking and
is scheduled to be released on Friday 5.5.00.
The need for a "B" oven is being revisited (see weekly from 11.18.99).
A cost proposal has been submitted.
## The "B" oven would be a smaller unit, more convenient for small loads.
Contamination Incident
-----------------------
Michael Landry, Haisheng Rong
Recently, MC1 was removed from HAM7 to replace
the 0.0017" diameter suspension wire with 0.0016" (in keeping with MC2-3).
Once the mirror was moved to the optics lab, a large deposit was noted
on the MC1 front face. The deposit ran in a streak from the edge of the
optic, approximately 1.5" long, ending in a tear shaped smudge. As
the streak ran from near the top of the front face and straight down, the
contamination occurred after the optic had been hung. The deposit
may have been sweat that was shed during installation or subsequent work
in HAM7. It also may have been Liquinox, although this appears less
likely as such a deposit would have probably been observed at bake time.
A photo of MC1 prior to re-cleaning is available at http://www.ligo-wa.caltech.edu/~mlandry/
.
Optics:
---------------------
(D. Cook)
BSC7&4; HAMs7,8,9 optic tables have been leveled and reset to proper
elevations using the optical level. Some of these optic tables had not
been set after the seat replacement. The realignment of the Core optics
using the COS autocollimator technique is taking longer than expected.
It became necessary to closely identify the actual optic heights, target
placement in relation to the therorical beam path, table elevations. The
X-arm should finish by weeks end and the Y-arm by early next week. The
balance of COS baffles, telescopes and dumps will
follow on over the next two weeks
Seismic Systems:
----------------------
(H. Radkins, C. Gray & M. Guenther)
**note: activities since 4/20 are reported**
BSC9 (4k ETMx):
4/20-4/27---Encapsulated accelerometer is now on-line. It can
be seen on:
H0:PEM-BSC9_MIC. This accelerometer is a different model than
our PEM on-site accelerometers (731A vs. 731-207) and has a sensitivity
up to 1000 V/g. Other BSC9 news is that the Expansion Bellows passed
their leak check.
4/27-5/4---Z-pivots have partially been installed. External Accelerometers
(731-207) have been mounted and are on-line.
2k HAMs:
4/27-5/4---Elevations/level of HAMs 7-9 were checked; target Z = -200.0
mm (global), +/- 0.3 mm level, +/- 1.0 mm elevation. No adjustments
required for HAM7; HAM8&9 needed adjustment (see detector e-log 5/20).
CAS:
4/20-4/27---A CAS test was run 4/20 on BSC 7 to investigate the effect
of holding torque to the positioning motors on optics alignment. No
effect
on alignment was found with holding torque, however the air bearings
were
also floated during the test and a possible "strain relief" effect
was noted.
A minor revision 1.3 of the CAS software has been installed on the
2-channel and 4-channel racks. Air supply has been run to the 2-channel
rack, and its BSC 8 database has been transferred from the 4-channel
rack.
We now have CAS capability on BSC 4, 7, and 8. The calibration
of the Fine Actuator Hytec prototype PZT channels is nearing completion.
We expect to receive them back from Physik Instrumente next week.
4/27-5/4---A height adjustment was performed on BSC 7. The operation
went smoothly. An air bearing filter upgrade is planned to extend
air bottle life. Parts are on order.
Detector Commissioning: We measured the cavity pole frequency of the mode cleaner and found that it has not changed over tyhe past two months. We measured the alignment sensing matrix for the wave front sensors and then implemented the alignment control software. We found that there was some gain at DC but negligible gain above 0.1 Hz. We are trying to increase the gain by putting more power on the wave front sensors. We are now investigating the relationship between the SFW outputs and the control signals placed on the MC mirrors. We find that there is a strong coupling between longitudinal actuation and measured pitch and yaw.
We re-measured the violin mode Q of the recycling mirror suspension in air. This time we measured the motion of the wire with a shadow sensor using a He/Ne laser and a centroid sensor. We excited the violin mode with the same coil as previously. We drove the coil by a sine wave at one half of the violin mode resonant frequency so that the wire oscillates at the resonant frequency (335 Hz). When the excitation was turned off clean ringdown waveforms were observed. The Q value estimated from the decay time was 2520 +/-83. We also swept the frequency of the excitation (signal to drive the coil) and plotted the amplitude of the detected signal as a function of frequency. The Q value estimated from the width of this plotting agreed with the Q estimated from the decay time.
We optimized the local (position) damping of MC1, MC2, MC3 and MMT1. We gave a square wave to the POS test port and measured the POS monitor's response. For MC1 and MC2, the response was close to the theoretical step response of the SOS calculated by P. Fritschel when POS gain was 10. So we set all gains at 10 for MC1 - MC3. In the case of MMT1, POS gain of ~5 gave the closest response to the theoretical step response. We also observed that the ratio of the stack rms motion to the pendulum rms motion (estimated from the spectrum of POS monitor) increases linearly with the POS gain indicating that as the gain increases the optic tends to follow the suspension tower's motion.
CDS: Juilien Svoboda will be leaving LIGO after May 4 to prepare for her new baby. She has completed two documents describing PEM software interfaces to the dust monitors and FMCS. Drafts can be viewed at http://abundance.ligo-la.caltech.edu/~juiliens/ and final versions will be placed in the DCC after review. If any question should arise in the future, Juilien can be reached through email at home.
Installed cables at the south and west end stations for camera's, illuminator, quad cell and optical lever.
Detector installation: Cleaning and baking of COS components continues. ISCT3 moved from lab into position. ISCT1 moved into lab for assembly.
Weather Stations: South End remote connection established (this allows among other things Web access when equipment is all functional). South end datalogger program running and cds collection software functioning and talking to data logger.
Data logging and Seismometers: ADCU 5 and 6 have all the anti-aliasing chips in and are running. Initial seismic coherence measurements done. Anthony has made some initial measurements of the coherence of the z-axis of the three seismometers.
Community relations: LSU physics majors taking Greg Stacey's
optics class toured LIGO last Friday. About 50 K-12 teachers participating
in project PLATO, a teacher in-service program to improve science teaching,
spent a full day at LIGO on tuesday touring the site, going through the
hands-on activity with polarizers and spectrometers, and then conducting
other business using our conference rooms. Three more groups are scheduled
to visit this Saturday.
All MIT activities reported in other categories
All CIT activities reported in other categories
| Installation:
Livingston |
Commissioning:
Livingston |
Other
Science/Engineering
Activities |
Stan Whitcomb, Introduction and Concluding Remarks
Peter Fritschel, Servo Charaterization and Performance
Nergis Mavalala, Suspensions
Daniel Sigg, Characterization of Environmental & Input Beam Noise Inputs
Bill Kells, Core Optics Characterization
We started MC realignment and we encountered a major problem: MC1 (surface normal) seems tilted up by about 1.3 mrad and can not be fully compensated by the SUS controller. We checked the balance angle of this mirror after we changed the wire in the optics lab, and it was within 0.5 mrad. Some changes must happened during transportation and installation. We are working on the final diagnosis.
An AR coated beam pick-off wedge (30') from CVI has been checked out, and it looks suitable for the RFAM measurements after the EOMs on the PSL/IO table. At 3 - 8 degrees of angle of incidence, the reflectivity of the AR surface is 0.5% and the difference between S and P components is 3%. As a comparison, the beam pick-off mirror currently being used has transmission of 0.8% and the difference between S and P is 5% at 8 degrees of angle of incidence.
Gerrado Moreno, Larry Jones
An instance of ribbon cable
touching (contacting the support table, between the support table clamp
and the first leg element clamp) was discovered on the east side of WHAM
8. This will be corrected by adjusting the unsupported length.
N.B.:
This is the first instance of a cabling problem on the HAM chambers. The
general problem of cable creep is under investigation. (D. Coyne)
The three flat test progresses when the room temperature is stable.
Phase map difference between transmission measurements of 2ITM01 and
2ITM04 (flipped about Y)
LHO 2K Y and X ITMs respectively.
T=Tilt P=Power A=Astigmatism
| Diameter | rms-T | rms-TP | rms-TPA |
| (mm) | (nm) | (nm) | (nm) |
| 200 | 18.9 | 18.7 | 18.5 |
| 80 | 7.7 | 4.4 | 3.6 |
| 60 | 5.9 | 3.8 | 3.5 |
| 40 | 4.0 | 3.2 | 3.1 |
| 30 | 3.5 | 3.2 | 3.1 |
A Phase map of the full 200 mm of ITM Difference data
Taken from the two CSIRO Phase maps of the ITMs in transmission.
Measured through side 2, off side 1 and returning through side 2.
The factor of 2 is accounted for in the CSIRO software. ITMy-ITMx
(flipped about y)
This week we began a pumpdown of the TNI, in order
to check our mode
cleaner optics and track down some residual shake in the mirrors, which
are
still clamped to their earthquake stops. We also wanted to do
a dry run to
make sure our vacuum hardware still works, since the pumps haven't
been
exercised in some time.
In preparation for this experiment, we moved some
optics out of the
chamber and changed the oil in our large roughing pump. We closed
the
chamber on Tuesday and began pumping down on Wednesday.
Alignment was not affected much by closing the chamber.
The mode cleaner
still resonated in the TM00 mode, but we did need to walk the beam
to
recover optimum transmission, about 70% for our rough alignment.
We have
not yet measured the noise or the finesse, but we expect to do so within
the next day or two.
Eric presented a paper at the APS meeting in Long
Beach on Sunday, Ken
gave a talk at the PAC meeting on Monday, and Luca has been at Hanford
all
this week.
----------------
Vacuum:
Ed K. has physically completed all the remaining annulus systems and
tested/pulled vacuum on all but BSC0 using turbos. Annulus
ion pumps are operating valved off as we wait for the annulus waterload
to
decrease.
Mike Z. has returned from travel and is trying to calibrate
and interpret the RGA spectra from the main volume.
Infrastructure:
Nearby construction has stepped up, with vibrating pile drivers now
inducing perceptible accelerations in our building (especially
unnerving to the few of us with direct earthquake experience).
"High-level" talks have been initiated with those in charge.
Three talks/presentations are given related to e2e in the past week.
Two are at ASP by Biplab (e2e general and optics) and Hiro (MSE).
The third presentation was given by Hiro at the PAC meeting, summarizing
what has been done at the W2K one arm run, what is going on, especially
the lock acquisition work by Matt, and the future planning and resources.
Meeting
After the PAC review meeting, in the regular e2e meeting, with Albert
and Kent attending, two topics which were hilited at the PAC were discussed.
One was various possibilities of speeding up the simulation.
The first action item is to evaluate DEC ALPHA. Ed will install e2e-all
package on the existing DEC ALPHA to see the compatibility and the
speed
gain. After the installation, Hiro will join to test the simulation
engine
compatibility test. If we see positive results, Albert will look into
the possibility of purchasing faster DEC ALPHA (1.2GHz), possibly with
multiple
CPUs.
There are several possibilities of the speed up by the imporvement of
the
software code. Hiro will lead this effort, possibly with the help of
<to be
appointed> programmer(s).
Another topic discussed was the future development of alfi. There was
a
suggestion raised to move to use JAVA. The pros and cons are discussed,
including the scope and lifetime of the software, but no definitive
conclusions come out of the discussion.
Lock Acquisition
The c code version of the Lock Acquisition filter is developed and improved.
e2e codes are modified and it is easier now to share the codes between
CDS and e2e. A C++ code has been completed which provides the same
functionality as Peter Fritschel's pz2iir.
Alfi
Bruce wrote a perl code to help people to reorganize box files in a
logical
way, which can be handled properly by in the new version of alfi.
paper
Biplab started planning to write a e2e paper on the implementation of
the
optics and field.
MSE
G.Cella was supposed to come on April 29 for one week at CIT. Because
of
unknown reason, he could not get the prepaid ticket at Pisa and the
trip
was canceled. The next trip is being discussed, and the possible visit
is in the
middle of June.
LDAS presented its status to the PAC this week. There were no major
surprises or concerns raised during the presentations. On Monday,
bugs were found in the socket testing benchmark code where had to
be fixed "just in time" to present on Tuesday. The code is now able
to accurately measure data throughput in LDAS.
Even though the 0.0.11 version of LDAS was successful in injesting
trigger data from the GDS DMT system over the weekend, several significant
bugs in the software were identified and are being fixed. Among these
were corruption of char and char_u data types in the ilwd upon being
passed through the strstream class-still open; slowness and even failure
of the lightWeightAPI to handle large LIGO_LW documents-now fixed;
the
metadataAPI was corrupting its logfiles-now fixed.
The dataConditionAPI now has an FFT engine that supports both double
and single precision calculations. This required the use of dynamically
loaded libraries to implement since the FFTW package only supports
one
or the other in a process.
The wrapperAPI's interface to LAL code is better defined this week after
a meeting with UWM and a tremendous effort by Jolien Creighton to join
the two worlds. The communications of input data have now been completed
and the communication of output data is about half done. Work will
begin
on the flow control for the parallel computing once the output data
is
working.
Peter Shawhan overhauled his GUILD userAPI's communication with LDAS
to
use a new socket based method. He also added the ability to run multiple
jobs and to cancel a job.
A bug in GCC was discovered which caused the frameCPP library to be
non
reentrant. A fix exist for this within the GCC CVS repository and was
tested and found to be reason the library was not reentrant.
CIT:
Docuserv has been taken off of gsparc and is now on its own machine.
There are a
few minor changes that need to be made but so far everything is looking
pretty
good.
The third floor of Bridge and Wilson House now have color printers installed.
Duplex units are being added to the color printers on the 3rd floor
of Bridge
and the one in Millikan.
The hot topic for the day was the virus alert for the "ILOVEYOU" virus.
Fortunately, there were a number of people that helped spread the word
such as
David S. at MIT and Liz W. at CIT. Also, thanks to Phil E. who was
able to get a
temporary method of fixing the problem out to us. Most of the virusscan
vendors
now have a fix for the problem.
Full monthly backups were finished.
Larry is working on some financial and future planning of GC equipment.
Presently, talking with each of the groups to get more information
on what
future needs may be.
Barbara has made a number of WEB changes and is working on a server
upgrade for
document searches.
Stiff isolation system (S. Richman, J. Rollins, S. Chatterji)
We have been working on developing robust controllers using the position
sensors and geophones. We can now close all 6 loops on the upper
stage and
4 of the 6 loops (2 vertical, 2 horizontal) loops on the lower stage
to
within a factor of 2 of the design gain. This configuration is
quite
stable and reduces the very-low-frequency horizontal motion we had
experienced with earlier controllers to ~10 micrometers. We are
not
lacking for seismic drive signals; construction activity in our backyard
has actually increased and crept toward us (20 m from the experiment
at
closest approach!)
Jamie is nearing completion of a setup to measure multiple transfer
functions of the prototype simultaneously using the digital control
system. Shorouv is working on replacing the forcer current drivers
(the
current set are on loan from JILA).
Monitoring of the position sensors has shown the prototype has had little
significant drift over the past 1 1/2 months. Operating in air with
~ few
degree C temperature changes in the high bay, motion in horizontal
and
vertical directions has been less than 10 micrometers. The pitch
and roll
have been negligible, though there has been a noticeable yaw.
From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>
"soft" system report
We held no group meeting this week because of APS, PAC and TAG meeting.
So I made up the weekly report from my personal inquiries. I
may have
made several mistakes.
Everybody, prepared the seven APS presentations for last Sunday’s APS
meeting in Long Beach. It was a very good show!
I was also pleased with the remaining TAG members visit to our lab.
Szabi
New HAM design simulation and definition of drawing parameters.
Continuing on earthquake injection.
Alessandro
Tested Accelerometer on IP, found a large resonance at 30 Hz, that
almost saturated the accelerometer response. Finally tracked
the
resonance to the leg’s segmented counterweights vibrating in quadrupole
fashion.
Virginio
Full diagonalization achieved, found bug in software. Closed loop of
damping. Measuring performances.
Akiteru
Simulation: Writing a document on designing of suspension for TAMA
SAS.
Controls: Started working with Virginio. Found a bug in a program of
actuation matrixdiagonalization.
Hareem
Testing new blades on the blade testing fixture. The correction
factor
applied from the old to the new blades was found to be 12 mm instead
of
6. Will try to shorten blades and will determine new correction
parameter.
Riccardo
Designed ring counterweights and put them in production both for the
test setup and for TAMA. Stopped delivery of TAMA IP system until
new
counterweight will be ready. The new counterweights will use
the same
bell for the TAMA prototype and a new one for the test tower. E.t.a.
to
be figured out starting from raw materials delivery times.
Flavio
Tested the Marconi drive lasers
Small reminder.
This coming saturday, in the outreach spirit,
we will host half a dozen
High School students, they will characterise
a few filters. Please do
not leave measurements ongoing because we will
disturb them. Do not
leave delicate and/or dangerous things around.
Thanks to the ones that will assist me.
Ric
From: "Ryan C. Lawrence" <rclawren@ligo.mit.edu>
Core Optics Compensation:
I finished installing and aligning the in-vacuum optics, heaters, and
shields, and realigned the optics on the I/O table. I'm continuing
work on characterizing the CO2 laser in situ by using the galvos to
scan
the beam over a pyroelectric sensor. The VI appears to work,
and the beam
looks fairly decent. I'm now working on ironing out a few minor
details
in the VI, and making sure that what I'm seeing is real.
From: GariLynn Billingsley <Billingsley_G@ligo.caltech.edu>
Metrology
Veeco has not yet responded to the RFQ for an interferometer upgrade.
They
hope to respond next week.
From: Phil Willems <willems@ligo.caltech.edu>
Hydroxy-catalysis bonding:
-------------------------
Last week we tested the last of the hydroxy-catalysis bonds that we
made at
Stanford in February. Our ultimate strength was 2.5e7 Pa, which
is within 15%
of the unpublished ultimate strength value from Gravity Probe B.
There is still
lots of scatter in bond strength, but most values are well above LIGO
II
requirements. Future work will focus on speeding up bonding and
identifying the
clinkers as they are made. Tests of an ultrasonic flaw detector
for this
purpose were inconclusive. (Helena Armandula, Phil Willems)
For additional information about this report, contact sanders@ligo.caltech.edu