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The LIGO Executive Committee
Agenda for Monday October 30, 2000 will be:
(Meeting time: 10:30 am Pacific Time)
Open meeting 10:30 - 11:30
Special Items:
No report.
WBS 1.2 LIGO Operations--Administration
The list of current actions revised to reflect
open actions assigned through October 12, 2000 may be found at
ACTION
LIST.
From: Ed Chargois <chargois_e@ligo.caltech.edu>
Assisted the LLO Site Manager(G. Stapfer) requesting two (2) additional Pick-up Trucks from the General Services Administration to replace two (2) other vehicles previously lease form a local La. Dealership.
Assisted the LLO Site Manager (G. Stapfer) by submitting an accident report and a Purchase Order to repair a General Services Administration Lease vehicle to Gerry Lane Chevrolet at Baton Rouge, LA. upon completion of the repair GSA will issue a New Vehicle to the LLO.
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. . .
| Packages | Faxes | |
| In | 36 | 44 |
| Out | 12 | 41 |
Press here to access the DOCUMENT CONTROL CENTER WEB PAGE.
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
Received a change order for MMR, and several modification requests to correct expenditure types or reduce contracts. Also will work on two new setups for Inland Asphalt and Steve Bell. Continued to place pcard orders and reconcile payments.
From: irena@ligo.caltech.edu (Irena Petrac)
Univ. of Michigan: Proposal for D. Gustafson's effort in support of 2K LHO interferometer was received. CO to add required funds is under way.
Advanced LIGO/Optics Coating RFQ: Release of the RFQ, soliciting responses from potential qualified sources, is pending Project's inputs.
Galli&Morelli: Advance CO to add machining of materials for two TAMA SAS prototypes is being coordinated by Project Controls Group.
The contract with Inland Paving has been executed in the amount of $215,784, and they are already at work paving the Hanford service roads.
Letters have been sent to seven architect/engineering firms to solicit interest in designing the Hanford Staging Building.
The P-Cards are working great. Everyone seems to be happy with them and we are in the process of adding an additional ten (10) travelers to the list of card holders. The P-Card Expense Report was revised by Michelle Thompson's group and I made a few minor change recommendations. I received the re-revised version this morning and will work on it as time permits today. Once this new form is approved it will go over to Beth Moore's group to be put into FileMaker Pro form.
I prepared a few Advance Requests and Payment Requests using the old system due to various reasons that excluded them from the new system.
I also worked with World Travel Group to clear some outstanding canceled trips that had tickets that either needed to be transferred to a new traveler or a credit due from the airlines. These are special cases and since LIGO is a big ticket user with the airlines involved the airlines are giving us a case-by-case special credit or exchange.
Worked on and completed only fifteen (15) Expense Reports due to the excessive amount of time expelled on computer down time and the P-Card Expense Report form problems as related above. I now have a new computer and things should get back on track.
Prepared the Travel/Vacation Itinerary for the Week of October 23, 2000.
Performed normal recording and filing associated with Travel and Reimbursement. Worked on several problem issues with Travel Audit in addition to the above listed. Also performed miscellaneous duties as requested by various members of the LIGO Project here at Caltech as well as from members of the staffs of each of the two (2) sites. I continue to do MIT's travel to the sites for installation activities and also to assist them wherever possible.
Other activities: site trip update, Pcard purchases and reconciling.
Tracked and followed up on invoice problems.
Continue to monitor contract and blanket order funding levels and notify task managers when supplements are needed.
Jim continues to do data entry in the LIGO database and help out in the DCC.
Worked on updating PO logbooks.
Doing some filing for Ed Jasnow starting back with 1997.
Accomplishments:
WBS 1.4.1.2 Project Controls (LIGO Construction)
The following Change Request has
been submitted:
| CR-000018 | WBS 1.1.4 | Curbing for Service Roads at Livingston | G. Stapfer |
Press for the latest Contingency
Needs Projection.
From: Kris Duncan <kris@ligo.caltech.edu>
Continued with construction contract/work package close out.
Continued transferring data from the COBRA database into Excel spreadsheets.
http://docuserv.ligo.caltech.edu/~fireport
http://docuserv.ligo.caltech.edu/~finance
From: Ed Jasnow <jasnow@ligo.caltech.edu>
General Items:
--------------
(F. Raab)
We had the data acquisition system down for some work that had been getting pushed off to keep the lock acquisition work going and most of the commissars are getting some well-earned rest. Stan is here and we have some effort going to track down and fix some problems observed previously in commissioning work. Stan has also organized some special operator training and exercise to get prepared for E2. We expect one last push for stable full ifo locking before E2.
PreStabilized Lasers:
--------------------
Frequency noise modeling
(B. Bhawal, G. Cella, and R. Savage)
Frequency noise resulting from motion of the isolated
and suspended
reference cavity is being analyzed using the
e2e modeling software,
Giancarlo Cella's prediction of reference cavity
motion based on the
model he developed while at LHO last spring,
and PSL optical table
motion measurements made while he was here. With
the laser and optics
stationary and considering only the suspended
cavity motion, the
resulting frequency noise (caused by Doppler
shifting by the moving
mirrors) peaks at about 1e-2 Hz/rtHz at 12 Hz
(peak in the longitudinal
cavity motion resulting from coupling of the
stack tilt to cavity
motion) and falling to about 1e-5 Hz/rtHz at
100 Hz.
We will now consider frequency noise caused by
the relative motion
between the laser and mirrors mounted to the
optics table and the
suspended cavity for both the case where the
input direction to the
reference cavity is the same as for the 15-m
mode cleaner and for the
case where they are opposite.
Giancarlo is modifying his analysis to include
the internal modes of the
reference cavity with relative mirror motion
precision of 1e-18 m. He
expects to have results within the next few weeks.
4k PSL
(T. Mahood and M. Guenther)
The laser has been located in its hopefully final position and locked
down
using the new delrin microlocks and optic installation is commencing.
The
Livingston designed periscope and first turning mirror have been placed
in
their positions. Two boxes were received from Caltech containing
the bulk
of the items needed for the 4K PSL. We are awaiting a final determination
as to the optimum mirror mount to use, and then the turning mirrors
will be
placed on the table. The initial mode matching calculations have
been
completed, and the lens are on hand for the main beam path from the
laser
to the site of the premode cleaner.
Considerable effort has been expended experimenting with different means
of
support for the 4k optical table (i.e., regular legs, Al blocks, elastomer
inserts, etc) in search of way to reduce low frequency vibrations of
the table.
The 4k cross-connect has been wired, and minor discrepancies between
it and
the existing 2k cross-connect are being sorted out.
OPTICS/COC/SEI INSTALLATION: Arm Cavity Baffle at the X-end has been installed, aligned and disassembled. It turned out to be an unexpectedly large job to install the unit through the BSC door, and took 2 days. ETM-x has been repositioned and fine aligned, and the new ETM transmission monitor has been assembled and installed. This afternoon we'll go to Laser Hazard and use the COS-LAC to steer the beam into the monitor. All going well, we'll close up this week. Prepared and released a new SOP M000330-A-L controlling the IOT/ISC Table Operation in LLO LVEA. (Jonathan Kern)
Commissioning: The servo for the PMC was changed by reducing the 10 Hz pole by a factor of ten and then increasing the gain by a factor of 10. This was done to decrease the effect of a 13 kHz mechanical resonance in the PMC body on the intensity spectrum from the PSL. This also increases the DC gain which will keep the PMC locked closer to resonance.
Preliminary measurements of frequency noise show it to be still a factor of 10 too high.
The mode cleaner now locks robustly. One important procedure to perform if the mode cleaner will not lock is to bring down the mode cleaner gain until the demod out is not saturated. If it still remains saturated, then the DC offset must be adjusted to bring the DC level to near 0. (Joe Kovalik)
GC: Tape library arrived this afternoon. We will install it in
the rack and test this week or early next. Replacing a failed power supply
in a Fore 200BX. Installing various software packages for several people
on the GC net (e2e etc.). I have been installing and configuring
some web based database/scheduling utilities for the control room operators.
The scheduling part is working but several other items need
further configuration and testing. Eventually the operator checklist
will be web based to ease in trending/searching data from the daily forms.
Other: Our water well pump failed yesterday afternoon. We've improvised a temporary feed from Gerry's irrigation well and ordered a replacement.
A fire occurred at the intersection of the access road and Hwy 63 on 10/24. It spread from a trash fire set by the resident on the resident's property and then spread into the Weyerhauser owned forest land. It was brought under control approximately 9:30 pm 10/23 after consuming approximately 25 acres of forest. The closest approach to LIGO is was approximately 1 mile. The fire continues to smoulder and flare occasionally; we are keeping a close watch on it.
| Installation
& Commissioning:
Livingston |
Other Science/Engineering
Activities:
Issues/Concerns |
See also the Installation web page
Bill
Kells
Back
in Pasadena have been working on e2e modeling to determine the effects
of input laser frequency noise on [2k] ifo lock.
We were able to make the mode cleaner lock robustly, through fixes to a set of small problems in cable connections and in an offset setting on the mode cleaner demod board. Lock is robust enough that we can't yet quote a typical time to loss of lock; no longer is it measured in minutes, but hours or days.
A preliminary check of the PSL frequency noise reveals that high frequency performance is about a factor of 10 too high. It depends in a surprising way on the DC voltage applied to the PZT on the PMC only if the PMC is far off the resonance peak. This may occur occasionally as the PMC thermal drifts away from the DC setpoint and the feedback has to apply a large bias to keep the resonance. The PMC servo is being modified by reducing the 10 Hz pole by a factor of 10 and then increasing the low frequency gain by a factor of 10. This should increase the DC gain and reduce excursions from resonance. It should also decrease the effect of mechanical resonances at 13 KHz and above on the intensity noise spectrum.
Low frequency noise has been improved by the mechanical improvements on the PSL table that were made over the summer.
The pre-modecleaner (PMC) exhibited a first mechanical resonance at about 13 kHz. The old pre-modecleaner exhibited a resonance at ~9 kHz. The difference is thought to be due to the different bonding technique employed.
I helped Joe Kovalik layout the LSC photodiode calibration setup.
System tests of the LSC system are progressing slowly. They will not be complete before Jay, Flavio and Rich leave at the end of the week. Another trip back in a few weeks will be required.
Rolf Bork
Supporting LSC installation
at LLO (from afar).
The VME board running the MC1/MC2/MC3 suspension controllers was flaky and needed to be rebooted frequently.
Rick Karwoski, Paul Russell
The Premode Cleaner electronics
is a necessary component to the basic light source. The three custom
modules comprising the PMC which need to be built and tested are:
Two Ref Oscillator modules:
missing one component, otherwise completely stuffed. PMC servo
board stuffing has begun
Euro-crate, fully assembled and shipped to LHO. All other cabinet/crate-oriented (including OTS VME equipment) has been shipped to LHO Lab test equipment list compiled -- ordering tomorrow
Mohana Mageswaran
A 1TB RAID5 system has been installed on fortress.
I also tested running many monitors on one of the DMT machines to make sure that there were no reasons that many monitors couldn't run concurrently. At one point I had 13 monitor running (mostly different copies of my channel monitor) on a single machine (sand) with no obvious interference. I conclude that the most severe limitation on the number of processes that may be run is just the available computing power, and that there doesn't seem to be any apparent unexplained load increase when many monitors are run on a single platform.
Various pieces in progress -- electronics and cables being fabricated,
optics being laid out. No new milestones this week.
LASTI SEI installation (Hugh Radkins, Corey Gray, Ken Mason, Myron
MacInnis, Mike Zucker, Matt Smith, Ed Kruzel):
Helium leakchecking was completed Friday on the four HAM-13 bellows;
all passed. Thanks to much coaching from John Worden the procedure
went smoothly, and all our rag-tag secondhand equipment functioned
well. We're exploring the idea of borrowing a second QDP-80 roughing
pump (any spares out there?) to improve our cycle time. With
one pump
it takes 11 hours of nursing to wean over to the turbo and start
testing; we'd like to fit that into a single shift if possible.
We backfilled Monday and installed the external support wings and
structures. Because we have no scissor tables for fine height
adjustment, some precision shimming was made up to level the support
beam attachments. The structure is now solid and very well aligned.
Tuesday we removed the doors again for stack installation on HAM-13;
this also went very smoothly and, as of Wed. evening, HAM-13 SEI
installation is complete, outside and inside. We are now ready to
replace the doors and move on to HAM-21.
e2e workshop
There was a e2e workshop held last week from 18th til 20th.
On 19th and 20th, discussions were made among Hiro, Biplab,
Ed, Michel and Malik about the collaboration and support at sites.
Installations on LHO and UFL machines were done remotely from
Caltech by Michel and Malik, to make sure they can do the future
upgrade maintenance. The details of the e2e internal structures
and Han2k model were explained.
LHO model
Biplab is visiting LHO to complete the PSL noise study. The detail
is explained by the weekly report by Rick Savage.
Adlib (engine)
Based on the suggestion of R.Weiss, the module simulating the rail
effect now includes the saturation of slew rate.
The simulation of the curved mismatch was checked and there were
a few mistakes found (part coming from VIRGO note). After fixing this,
the e2e simulation passes a sanity check.
ALFI (GUI)
A through test of new alfi based on the new graphics rendering code
has been performed. The alfi bug database has been updated including
these new test result.
A discussion among Ed, Bruce, Matt and Hiro addressed removing
the support of "instances", by using macro (or alias) more extensively.
It was concluded that that decision will be postponed until we have
a more detailed modeling which may demand the concept of "instances".
Software Systems (Blackburn)
This week was spent extensively testing the current version of LDAS in
preparation for the Engineering run. These tests have been primarily carried
out on the local development system where bugs that are being identified can
quickly be fixed and retested. However, over the past few days we have begun
to focus also on performing these tests on the Hanford LDAS system. This is
strickly needed because of the differences in hardware used by the various
LDAS software modules (APIs) between Hanford and CIT. At present we are
performing i) database insertion tests, ii) ilwd data transmission tests,
iii) frame to ilwd data translation tests, iv) dataConditionAPI MDC tests,
v) DMT trigger ingestion tests, and vi) high rate random user command
requests. These test have identified a half dozen major bugs to be fixed in
preparation for the E2 engineering run. But we expect to have most fixes in
this week and repeat the testing on the new distribution of the software. One
of the bugs is hinting at a new problem with FFTW with the system is low on
memory which is sever enough to crash the dataConditionAPI. The details of
whether or not we can implement a work-around for this are actively being
explored. An effort to fix bgerrors in the TCL (event loop associated errors)
which were unexplained since the MDC in August has finally been tracked down
and fixed this will remove the unmeaningful "red-ball" bgerrors from the log
file. A memory leak was first introduced while fixing this error but has
since
been fixed. Other fixes this week occurred in the frameCPP and frameAPI.TCL
codes.The new wrapperAPI was built and tested on the new LDAS development beowulf
with its currently working 8 of 16 nodes. The available functions from UWM
which have been tested in the dynamically loaded shared object library were
initSearch(), conditionData(), and finalizeSearch(). UWM is still
implementing
the applySearch and freeOutput() interface functions. These will be tested
in the next week. The new wrapperAPI will also soon host the dynamically
loaded shared object developed by Gray Rybka (LIGO SURF student and now part
time student worker). The wrapperAPI will also begin documentation
development
in the framework of the new perceps C++ documentation generator. The testing
of the wrapperAPI with the mpiAPI interface has only been performed using a
mock interface. The mpiAPI development has fallen behind as a result of the
need to support the preparations for the engineering run.We have seen a steady decrease in the number of open software problems over
the past few months since the dataConditionAPI MDC. This decrease has now
leveled off with all the testing/debugging activity in preparation for the
engineering run at roughly half the level seen during the MDC.The dataConditionAPI group identified an issue with handling bad exceptions
which were occuring in the dataConditionAPI and causing the API to terminate.
These issues can impact any LDAS API but have only been seen in the d.c. API
due to its extensive use of specialized exceptions. Several proposals on how
to handle this issue have been proposed. The most robust solution will
involve
reworking a significant amount of API exception handling which could not
possibly be ready in time for the engineering run. An interim fix will be
needed for the dataConditionAPI prior to the run if it is to be used at all
in the E2.A GUI for the controlMonitorAPI specifically to control the tapecontroller
script to be used in the E2 run has been implemented. It has been handed off
to Greg Mendell at Hanford for evaluation. In addition, the controlMonitorAPI
interface now included support for restarting, shutdown, adding and removal
of LDAS APIs from the running system.
Data Analysis
Philip Charlton has done some more work on statistical properties of the FCT
output for Gaussian noise. He looked at the distributions of a sample of
points
in the FCT-power plane. We expect these to be chi^2, which they appear to be.
He also looked at distributions of the sums of powers from two adjacent bins
for a sample of the FCT plane. We expect these to be chi^2 degree 4. They
look
chi^2 but I haven't yet checked how well they maatch the degree.
Hardware Systems (Anderson)
All LDAS sun computers are now running Solaris 8 Maintenance Update 1, and
all LDAS networks have completed migration from ATM to 100/1000 Mbit/s
Ethernet.CIT-DEV
-------
1) dataserver was upgraded to 4GB of memory and Solaris 8.
2) sunbox1 was upgraded to Solaris 8.
3) A new U10 was installed with Solaris 8 to run as metaserver.
4) ldas-sw has been downgraded from 4GB to 2GB of memory.
Livingston:
-SUN maintenance contract for the 3000 has finally gone through.
(Shannon and Tom)
-Tape library arrived this afternoon. We will install it in the
rack and test this week or early next.
-Replacing a failed power supplying a Fore 200BX.
-Installing various software packages for several people on the GC
net (e2e
etc.).
-Installing and configuring some web based database/scheduling utilities
for
the
control room operators. The scheduling part is working but several
other
items
need further configuration and testing. Eventually the operator
checklist
will be web based to ease in trending/searching data from the daily
forms.
Hanford:
-Getting things ready for the engineering run.
CIT:
(Lisa)
- Installed 2 Ultra 10's for Rolf on the 113 subnet.
- Luna was not behaving as a gateway. That's fixed now.
Computers on the
113
subnet can now use Luna as a gateway for internet access.
- I'm trying to transition the Wilson House PCs off the 125 to the
115
subnet.
- All of the components to upgrade the modem pool have arrived.
- I've been demo-ing backup software that will back up both the Solaris
and
the
NT servers. So far I've looked at Cactus Backup Professional.
It had bugs
in
the GUI and is very expensive. Bru is not sophisticated enough
for our
environment. Also, most of its advanced features are in the command
line
tools
and haven't been implemented in the GUI. Sun's Solstice Backup
is very
sophisticated and will do everything we need, but the learning curve
on
configuring it is steep. It would be a difficult piece of software
to hand
off
to someone else to run. I'm currently awaiting a demo copy of
Quick Restore.
- I have one last problem to resolve before kater can be decommissioned.
If
anyone has a sbus ethernet card to spare, I need one.
(Sam)
-Finally finish with the new NT box for dcc.
-Got the gateway pc up and going that wasn't recognizing its hard drive.
-Settled laptop problems with dell.
-Dealt with a gateway replacement part return issue.
-Installed office component on liz's machine.
(Barbara)
- Made changes to DCC database -- tables, forms, reports, etc -- to
support
multiple files for a document and to support any file type. Am
now working
on changes to the web forms.
- Installed new LIGO home page and First Lock pages. Reworked
the News,
Travel, and Calendars web pages.
- Have talked with Verity Inc. about their Information Server for indexing
our PDF files. They are supposed to send a quote.
- Helped Rita with the Roster database and made some quick changes.
(Suresh)
-Worked with Larry on last saturday, to install some hardware (memory
and
mass
Storage unit, Sun SunStorage D1000) to system sargas.
-Saved the configuration files of all ATM workgroup switches to a tftp
server
(homam).
-Installed and configured needed application software on Irene's new
PC.
-Worked on some system related files on system tiger.
(Larry)
- Finalizing a number of procurements to get things wrapped up for
the end of
the fiscal year.
- Worked out a number of network problems. Moved part of the 125 subnet
to
another switch.
- Repaired and setup a couple of PC's. Resolved a few virus issues.
- Working with Jordon to get some data transferred from a HP unit.
The
equipment
that would have been able to read and convert the data from the disk
had been
turned over to CIT. Jordon is presently working on other methods to
try and
get
the data on to the computer.
- Setup a new disk partition on sirius, /ligoapps. This location is
to be
used
for storing programs developed by LIGO groups. Also, working on a large
scratch
area (100-150GB) for users to test their programs and check out data.
From Bill Kells:
Picking back up on FFT-MELODY comparison studies.
Working on OTF Sapphire mirror cavity measurements with JOrdan.
Also effects of (predicted to be large) "Rayleigh" scattering
from Sapphire ITMS.
From: Helena Armandula <ahelena@ligo.caltech.edu>
Loading Test
We loaded a fully cured bond (over 50 days old)
with 25 lbs. and is still holding the weight a week later.
Tension Test
Repeated tension tests at Durkee Labs. and the results obtained last
week did not improve.
We are setting-up to measure tension in our lab.
From: Mike Zucker <mike@ligo.mit.edu>
Adaptive thermal core optic distortion compensation (MZ for R. Lawrence)
------------------------------------------------------------------------
Ryan has now characterized his 10.6 micron heating laser beam at the
target focal plane using his homebrew pyroelectric beam scanner. The
beam is better than 99% TEM00, and its parameters are now known
accurately enough not to affect experimental errors.
The 4" C-axis test optic has so much spatially
varying birefringence
(evidently due to internal stress??) that the
current double-passing
arrangement for the Schack-Hartmann sensor (quarter
waveplate/polarizing beamsplitter) produces gross
spatial nulls in the
return beam. Ryan ordered some new optics and
will switch over to a
polarization-insensitive readout system to get
around this. At the
same time we're wondering how representative
this particular boule
really is...
From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>
Warren Johnson:
Joined the meeting by phone. Illustrated a possible suspension
with
CuBe suspension wires and Sapphire fingers to evacuate heath.
CuBe OK
because Q factor for it grows as T3~T4 and can be machined to get good
flexibility where needed. Also could use sputtered Beryllium
to adhere
to mirrors.
Discussed differences with Sapphire only suspensions and heath
evacuation.
Frederick
the readout electronics box thermostabilization results.
Studying sapphire Q measurement samples.
ChenYang,
Designing electrostatic actuator hardware.
Akiteru:
TAMA IP driven to 30 mHz, measured 80 dB at 2 Hz, 60 dB at 1 Hz.
Only visible resonances up to 20 Hz are the suspended chain
resonances!!!
At 20 Hz IP leg to F0 standard resonance.
DSPs in Austin TX, supposedly for test.
Alessandro
Received from Alessandro the 3 new accelerometers.
Updating drawings with Gianni for production run of 9x for TAMA 3 m
and
Livingston tests.
Giancarlo:
Sent some simulations of MGASFs, Nice results.
Riccardo:
Updates on optical heath pumps and possible Sapphire mechanics.
For additional information about this report, contact sanders@ligo.caltech.edu