Graph provovided
by Cindy Akutagawa.
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The LIGO Executive Committee
Agenda for Monday April 10, 2000 will be:
(Meeting time: 10:30 am Pacific Time)
Open meeting 10:30 - 11:30
Special Items:
LHO 2K Engineering Data Run completed
Observatory log book style guide from David Shoemaker
No report received.
WBS 1.2 LIGO Operations--Administration
M. Coles and F. Raab have been requested to review their budgets to determine if "mid-course corrections" are needed. Cost reports will again be reviewed April 13 using end of March data. The end of March data will be distributed this week.
The monthly financial reports can be found on the network in .pdf format.
From: Ed Chargois <chargois_e@ligo.caltech.edu>
Assisted the Detector Group (L. Jones) with packing and shipping of a BSC Cable Form to the LIGO Hanford Observatory via UPS, delivery confirmed. Account Number LIGO.5F500 2.2 NSFLIGO.5F5000.
Assisting the LIGO Livingston Vacuum Group (A. Sibley) with arrangement of transportation of four (4) Transformers, approximate size 4'x6'x4', wgt approximately 5000 lbs. to be shipped to the LIGO Hanford Observatory, Account Number LIGO.5B600 1.5 NSFLIGO.5B6000.
| Packages | Faxes | |
| In | 34 | 35 |
| Out | 13 | 48 |
Special Projects: Processed fairly high volume of electronic docs. Began working on PSI electronic drawings.
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
I finished up Apollo and walked over change orders 11, 12, 13 and 14 on Monday for signatures and approvals.
As I work on the change orders for the various subcontracts, I have been including a spreadsheet documenting the different "revisions", "change orders" and transactions which have been made in the purchase orders in Oracle. Note that a "revision" in Oracle is not the same as a "change order". Change orders are requisitions received by the dept to be processed pertaining to the purchase order. However, revisions can be made for internal modifications, to correct a field, to transfer funds, or to cancel an encumbrance. The change of certain fields of a purchase order automatically create a new "revision". The spreadsheet includes the revisions made in Oracle, and also the change orders processed. It is also includes the information from IFIS.
This spreadsheet provides the history in a concise way so transactions are clear as to what has taken place. Backtracking and gathering the data on the different revisions is not easy as there has been a definite learning curve pertaining to the way we input and modify purchase orders in Oracle since it was implemented last July. However, since we are beginning to track the different revisions on the subcontracts, it is easier to backtrack now, than it would be to start backtracking at a later point in time.
I am still working on Triad and will begin working on Sun River which I have to set up the folder.
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
Irene Baldon
Worked on preparing the paper work for 12 new trips taken recently or upcoming (12 Payment Requests and 7 Advance Requests). There are approximately an additional 19 new trips in various stages pending completion of travel arrangements before the paper work can be completed.
Completed 20 Expense Reports. There are 20 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.
I have spent some time during the past week working with Rita showing her how to process Expense Reports. She is progressing very nicely. Thanks Rita! Rita has completed 12 Expense Reports.
Performed normal recording and filing associated with Travel and Reimbursement. Also did research on 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 April 3, 2000.
Rita Torres
For I. Petrac formatted LSC report from Louisiana Tech, electronically filed with DCC for posting on the MOU/LSC web page. Scanned more MOU Attachments to be posted on the web page. For E. Jasnow formatted Cooperative Agreement with Louisiana State for the weather station at LLO; signatures pending.
Obtained requisition #8709 to TekniCircuits for J. Mason. Spent more time on travel documents, have completed a few more this week. Completed input from D. Lloyd to place each PO log entry under the correct account, then printed out summary for filing under each Poeta. Usual P-card activities, chased invoices, reconciled some. Did site trip updates.
Dorothy Lloyd
Graph provovided
by Cindy Akutagawa.
Invoices continue to trickle in slowly, but are being process with requisitions and receiving on-line. For more detail see "Cost Schedule Control Systems" report by Esther Cunningham.
Tracked and follow up on invoice problems.
Monitored contract and blanket order funding levels and alerted task managers where supplements needed to be made.
Both Jim and I worked on updating the PO Log Books (Jim the old set and I with the new POETA set).
Reviewed payments processed by Esther during the week of March 27. Payments were entered in contract summary sheets and the LIGO database by both Jim and me.
Elizabeth K. Wood
Got the annual report off to the NSF. We got the money. I remained on the phone even as Dr. Berley pushed the approved button
Did a lot of hiring and other personnel-related activities.
Progress Period from 3.30 to 4.6
Accomplishments:
I have received most of the materials that I need for the Quarterly Report for the end of February 2000. I am impressed. We should be able to submit a good report this quarter.
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.
The following change requests have
been submitted:
| CR-990028 | WBS 1.1.3 | Beam Tube Enclosure Closeout | F. Asiri |
| CR-000001 | WBS 1.1.4 | Fencing Road at Livingston (Information Only) | G. Stapfer |
| CR-000002 | WBS 1.4 | Project Office Close Out | K. Duncan |
| CR-000003 | WBS 1.1.4.3 | Erosion Control--Livingston Observatory | G. Stapfer |
| CR-000004 | WBS 1.1.4 | Protection of Concrete in LVEA at Hanford | O. Matherny |
We are scheduling a meeting of the LIGO Change Control Board, Tuesday, April 11, 2000 at 9:30 PDT in the Engineering Conference Room (ECR). The following change requests will be discussed:
Press for the latest Contingency Needs Projection. This list should be reviewed and revised.
From: Kris Duncan <kris@ligo.caltech.edu>
No report this week.
Announcements:
--------------
(F. Raab)
We had a successful engineering run starting
on Monday (about 3 hrs delayed)
and
ending Tuesday about noon. Thanks to the LSC
members and all LIGO Lab folk who
participated.
Gregory Mendell will join the LHO staff in
June. Gregory is currently a
Visiting
Professor at the University of Wyoming and he has been actively pursuing
modeling
of fluid dynamic instabilities in neutron stars and the gravitational
radiation
thus produced. He will be responsible for the LDAS system at the observatory.
Peter Fritschel, Nergis Malvalvala, Dale Ouimette and Richard McCarthy
are
in the
process of testing the common-mode servo electronics.
Seismic Systems:
----------------------
(C. Gray , H. Radkins & M.Guenther)
Installation work continues at BSC9 (X-end); Down Tubes and Bellows
have been prepped for installation.
Received Accelerometer and hardware from Joe Giaime/LLO for transfer
function measurements at BSC9 in the near future.
Four prototype PZTs (used at HYTEC) were sent out for re-calibration.
Controls:
---------
(D. Barker)
Tested and installed EPICS autoSaveRestore on MY suspension controller.
Investigating Solaris EPICS server software to allow GDS UNIX programs
to raise EPICS alarms. Continuing to redesign CDS file structure before
it is put under CVS configuration control.
Commissioning: We fixed the EO shutter on IOT1 and raised the power into the MC to 2.5 watts. The MC continued to lock stably. We measured the noise power spectrum of the MC MCA signal at low frequencies to look at the 16 Hz bounce mode. Results are on the iLog. This is being compared at LHO to results seen there to evaluate the effect of the horizontal/vertical coupling. Some improvement in the MC mode matching was accomplished. The visibility increased from 0.79 to 0.88.
Optics: 4 core optics in process, COS cleaning and baking ongoing. The guide rod on ITMx appeared to have slipped during the curing process, so it is being stripped clean and rebuilt.
CDS: Assembly of rack 1X8 (ASC) including cross-connect wiring and testing, and mass-term cables fabrication and testing is complete. We are waiting for a shipment of boards from Pasadena to complete the crates and begin system testing. All field cables are installed, terminated and tested in preparation for installation of BS, RM, ITMX, and ITMY. Testing of 1X7 (LOS controller rack) was previously completed.
PEM: The South End Station Tower is erected. Some instruments
have been mounted. 90% of wiring for both end stations complete. Seismometers
are now operating at all three buildings; LVEA,south and west end stations.
Anthony Rizzi has completed 90% of
permanent installation of the systems required for the seismometers.
He has all the PEM DCU's functioning---although we do not have enough chips
and BNC anti-aliasing boards for all channels. Warren Johnson and Anthony
are preparing for huddle test of the three permanent Seismometers. When
this test happens most of the seismometers will go off the air.
Community relations: Three high school classes from Denham Spring
High School toured LIGO and added to our mural collection. Mark Coles gave
the physics colloquium at Xavier University of New Orleans on Tuesday.
They have expressed some interest in participating in LIGO and want to
have further discussions this coming summer about possible avenues for
involvement.
All MIT activities reported elsewhere.
All CIT activities reported elsewhere.
| Installation:
Livingston |
Commissioning:
Livingston |
Other
Science/Engineering
Activities |
The re-built IR 940/990nm diode lasers have been received at LHO. Alignment targets for the ITM, FM, BS, RM, MMT3, and MMT2 optics support structures are being designed; they will be used to re-align the 2K COC in the vertex station during the 4/17 vent period.
Viewport beam dumps for HAM9 and HAM10:
The viewport beam dump parts for the 2K
IFO have been received at LHO.
Arm Cavity Baffle:
Approximately half of the arm cavity baffle
glass broke in shipment to LHO. The glass has been re-fabricated and was
hand delivered by Betsy to LHO. Assembly and installation drawings are
being prepared for the 4/10 installation.
Faraday Isolator:
One baked magnet assembly and half-wave
plate will be shipped to LHO on 4/5.
Mode Cleaner
Haisheng Rong, David Ottaway
Preparation of the MC2 replacement is
progressing:
The modified base has been sent to LHO
for baking 5 clean OSEMs have been received from LLO for installation in
the MC2 SOS.
The spare MC2 has 2 chips of about 1x1
mm and 0.5x2 mm on the side. This mirror suffered multiple gluing cycles
before we found the proper process, and when the side magnet and the wire
standoff came off, they took glass chips with them. To give stronger
bonding, we will rotate the mirror 180 degrees around its optical axis
and hang it with the same orientation as
MC1. This will mandate a slight
rotation of the SOS tower to accommodate the different wedge orientation.
PSL
Peter King
A number of discussions for kinematic
mounting of the pre-modecleaner have been initiated with Joe LaCour of
Kineoptics (thanks to Jonathan Kern). A kinematic mounting scheme
was developed in addition to some tightening of the tolerances in the pre-modecleaner
body.
COS
Mike Smith, Lee cardenas, Tom Evans
The following COS parts are in the process
of being cleaned and baked: PO/APS telescope assemblies, arm cavity baffle
assemblies.
Suspensions
Janeen Romie
LLO received the piezo electric actuator
and controller. Gary Traylor is measuring the resonances of the LOSs.
IO Controls
Jay Heefner
The WFS PD that was sent back from LLO
appears to operational. Jay will confirm his measurements and talk to Sany
about the symptoms.
Daniel Sigg
In preparation of
the E1 run the mode cleaner channels have been checked, the configuration
script for the reduced data set writer havebeen updated and aset of optimal
gain settings for length and alignment sensing have been determined. A
calibration procedure using multiple lines at 30, 300 and 1000 Hz has been
set up for determining the optical gain while the cavity is locked.
John Zweizig
This week I continued
to write and install the trigger generation functionality for the Data
Monitoring tool. The goal was to complete this in time to write a few triggers
during the engineering run at Hanford. This was almost accomplished, and
in fact an online monitor was generating a trigger every time the arm locked
or unlocked during the latter hours of the test (Tuesday morning). These
triggers were sent to a (newly written) trigger manager which then wrote
them to disk in a format appropriate for ingestion into the LDAS database.
The final step, sending the trigger files to LDAS, was not accomplished
during the run because of some minor problems which have since been resolved.
I now intend to reprocess the data offline with any available monitors
to generate triggers and test the ingestion process.
Guido is gathering and collating all of the mode-matching data on the x-arm to a) nail down a quantitative number for the current mode matching and b) develop a recommendation for moving MMT2 during the vent.
One Arm Cavity Studies
Peter Fritschel, Nergis Mavalvala, Luca
Matone
Calibrated the drive to ITMx using the
Michelson interferometer. The new calibration agrees with the previous
one within about 10%.
Tuned up the wavefront sensing alignment control for the x arm
Bill Kells
Sifting through recent LHO 2K arm test
data to get limits on mode matching
FFT code studies to corroborate Beausoleil discovered phenomenon That, in distorted IFO, the +/- SB Gains are not the same. Good progress identifying the source of simiar phenom in FFT results.
Sifting through recent LHO 2K arm test data to understand/verify the possibility that input beam pointing fluctuations are dominating the [orientation] matching into the 2K X arm. This claim seems distinctly at odds with the clean observation that the specular (no cavity) reflection from ITMx is extremely stable, through an aperture which is quite restrictive.
Exploring how to turn the following into a real measurement: We anticipate resonating the 2K RC for the carrier inorder to boost power for arm studies. This will be the first chance, perhaps, to get enough intensity in the ITM to see thermal lensing.
Transients Identification
Julien Sylvestre
I have been working
on characterizing transients in the one arm LHO data and the 40m data,
in order to construct a compact catalog of transients. In particular, I
am working on identifying characteristic scales in the recurrence time,
duration and amplitude of the transients.
Improved the mode matching. Sany moved the mode matching lenses on the PSL/IOO table to their calculated positions. Now, with proper alignment, we achieve a visibility of 0.88.
Worked on reconciling ringdown measurement with cavity pole measurement. We learned how to deconvolve the non-negligible decay time of laser power in our "step-function" test carried out the previous week. This yields a cavity (power) time constant of about 2.75e-5 seconds. >From the cavity pole we had expected 3.7e-5 seconds.
Turned up the power into the mode cleaner. We now have 2.5 W going into the MC, the most that the present PMC will allow us to deliver. We see no signs of power-induced instability, and indeed the lock is very robust. The power coupling to MC at 2.5 W is about the same as previous (~0.88).
Made a new measurement of the strength of the 16 Hz bounce mode in the mode cleaner.
PSL
Peter King
A bug was reported with the Pockels cell
oscillation software. The software did not return to the previous
value of the frequency stabilization servo common gain but to the value
obtained when the software was initialized. A new version has been
written and is currently awaiting a suitable test period.
Jay Heefner
Design of the Universal Dewhitening filter
that will be used to implement the digital suspension, LSC and ASC systems
is progressing. So far it appears that a circuit can be built that will
come very close to the requirements. The investigation of the design should
be complete by the end of the week.
Rolf Bork
ASC: Modified the frontend and supervisory
code to handle 2x7x7 basis xfrm matrix, one 7x7 each for pitch and yaw.
This replaces the single 5x5 for WFS and 2x2 for QPD signals.
Microseismic: After telecon with Fritschel and Joe G., have started on interface layouts for the microseismic peak servo.
LSC: In process of developing supervisory code to interface with the LSC frontend software. Hope to run initial tests on the system at Hanford next week.
Components for modification of the 10-W laser's current shunt have been obtained. In particular the two 1/4-W resistors installed by Lightwave Electronics will be replaced by a power resistor. Lightwave have agreed that the modifications can be performed by us .
A first draft of the Test mass phase maps were "delivered" to Erika for use in the FFT code. These use the derivation of the reference flat from a year ago. The current "Three Flat" test is still in process.
There was a failure of one of the fans used to push air around in the metrology lab. The fan was replaced and the room temperature is stabilizing.
Suspensions
Janeen Romie
Received four Macor new osem prototypes.
Received a quote for alumina, conductive coated heads from Wesgo/Duramic.
Progressive Technology's quote due tomorrow. Accuratus's quote due friday.
GHS NOTE: I include David
Shoemaker's style guide for log book entries at the observatories below.
This is a good guide to how we should record information in the log.
From: David Shoemaker <dhs@ligo.mit.edu>
Subject: ilog style guide
As we move to make the electronic log ('elog')
at the observatories
the official repository of information for the
day-to-day commissioning
and operations effort, and open to all, we'd
like to establish a style
for those entries.
We want to make the ilog as good a replacement
for the traditional
'lab-book' paper logs as possible, while taking
advantage of the
possibilities afforded by the electronic medium
-- file/web pointers,
etc. To help people new to the system, here are
some guidelines for
making useful entries. Please send comments on
ideas for entry
guidelines, ways to make this guide or ilog better,
etc. to me at
dhs@ligo.mit.edu.
I've sent it as simple email to encourage everyone
to read through it;
the DCC will have it in electronic form as LIGO-T000037-01-D.
Style Guide for ilog entries
LIGO-T000037-01-D
David Shoemaker 22 March 00
============================
First, some general notions:
----------------------------
An entry must serve two related functions: it
must communicate to your
audience, and the information must be accessible
by someone using the
available search tools.
To communicate well, the entry (or group of entries)
must have a
lead-in sentence or phrase which orients the
reader -- what is the
subsystem or system under study, and what was
the goal of the
measurement.
The data should be complete enough to recreate
the experiment; a
pointer to a previous set up is fine (if not
better).
The entry also should, if possible, draw a conclusion
or indicate how
the data are to be used. Ideas on interpretations
and speculation are
also very useful (but should be clearly indicated
as such!).
A series of entries in one series of experiments
(on a given day)
may be introduced in the first entry and conclusions
left for the
last entry to reduce the overhead and repitition,
but each shift
should be self-explanatory (perhaps by pointing
to a previous shift
introduction).
Before making your first entries, read one month's
worth of entries in
the log -- it will give you a sense of what works,
and especially what
does NOT work (what is that graph about? what
did they hope to
achieve? what is that list of numbers for?).
Try the search tool to
see what kind of entries make it easy to find
information.
PLEASE re-read your entry the next day, and feel
free to comment on it
(using the facility in ilog to put the comment
within the original
entry); your insight is uniquely valuable.
More specific points:
---------------------
FIXED-WIDTH TYPE: if alignment of text is important
(and it usually
is), enclose the entry in <pre> ...text...
<\pre> -- this will
make the text appear in normal Courier typeface,
and so aligned
columns etc. will remain so.
TABLES: Tables for repeated entries should be
identical in layout, if
possible; this is best achieved using a template
prepared in another
application (e.g, Word), and pasted (in text
mode) into the ilog
window. The table title (don't forget one!) should
be exactly
identical between occurrences to allow searches
(and is best pasted in
with the template). Whevener possible, use cut-and-paste
to get
quantities of numbers or long strings into the
ilog to reduce the risk
of error (and frustration).
FIGURES (embedded objects in general): A caption,
including the word
'figure', is important. Give axis labels, number
of averages, tool
used if appropriate. pdf files are strongly preferred
to other graphic
formats; ascii text is best for words. Exceptions
are ok for special
cases. Try to orient the figure for easy viewing.
If the figure is
very large (>200kb) please indicate in the text.
POINTERS TO DOCUMENTS: All pointers to documents
outside of the ilog
should be to documents in the electronic DCC.
This is to ensure that
documents are not moved, changed, etc. rendering
the ilog pointer
useless.
OPERATIONS vs. DETECTOR LOG: The Operations log
is intended to carry
operator information, responsible persons, alarm
conditions, changes
in state of the site, the site physical installation,
vacuum system,
the data acquisition system. Changes in the detector
installation
should go in the detector log, along with all
measurements and
analysis.
ILOG vs. DCC: For some documentation, the DCC
(Document Control
Center) is a more appropriate environment. In
many cases, information
will be first logged in the ilog, and then collected
and/or analyzed
and then assembled into a report which should
have a DCC number and be
electronically available there. Examples are
the development of
procedures, or measurements of resonances of
suspended optics. In this
case the DCC number should be added to the original
entry as a comment
to lead the reader to a definitive document.
An ilog entry might just
indicate that the data have been incorporated
in a new revision of an
existing document, and point the reader there.
POST-DATED ENTRIES: It is best if associated information
lies
together, and so if e.g., some spectra of measurements
are made on the
day following the experiment, it is best to put
them in the log on the
actual day of the experiment. An alternative,
when there is evolution
in the interpretation, is to put a comment in
referring to the later
analysis.
KEYWORDS: An entry should carry one or more keywords
(in the pull-down
menu) which describe the focus of the work. People
will use the
keywords to narrow a search; try some searches
yourself to see how the
concept can help if used judiciously. For all
work including the
complete set of subsystems, please use '2km'
(or '4km' as appropriate).
ABBREVIATIONS AND ACRONYMS: Please use the standard
TLAs (yes, Three
Letter Acronyms) for the subystems in any text
(including 'IOO' for
the Input Optics Optics). The search tool is
powerful, and so
reasonable abbreviations which leave out no consecutive
letters are
fine; for example, a search for 'interf' will
find interferometer,
interferometric, interferometers, but will NOT
find 'ifo' (so this
latter should be avoided). A search for 'boot'
finds 'boot', 'reboot',
'booted', 're-boot', etc.
MATH EXPRESIONS: Use any standard ascii characters
that get the idea
across; no actual subscrips or superscripts are
needed. 1.6e-19,
10^13, Hz/rHz, sqrt(f), etc.
During the past week we glued the side magnet onto our back, curved
mode
cleaner mirror, and we reamed out its fin with a drill bit to reduce
the
chances of breaking the magnet off again during installation.
(The problem
in the past has been that the fin fits too tightly on the magnet.)
On
Monday, we successfully installed the back mirror, along with all of
its
fins. One OSEM head was not functioning, and we fixed it by replacing
its
LED. We also replaced the LED in another head, upgrading from
an old-style
"dome" LED to a modern "flat" LED to give its fin more clearance.
We now
have a complete suspended cavity. All mirrors are suspended,
and all of
them damp in each mode.
We also fixed a fourth suspension controller to use as a backup, in
case
any of the ones we are using fails.
Most recently, we have been aligning the cavity and the laser to each
other, with the mirrors held in place by their earthquake stops.
This is
going well, but we are not yet finished.
LASTI (Zucker, Kruzel)
Vacuum system-
Completed and tested annulus turbopumping system on HAM21, which
includes right beamtube midpoint flange. Pressure is coming down
slowly, as expected from water/N2 desorption from O-rings. Finishing
the other three annulus systems this week.
Problem reported last time in valve interlock was traced to a
corroded
pin on a TTL AND gate (!). Interlock now passes all performance
tests
and has been wired in permanently.
Some last-minute changes to the RGA nipple design (to make it more like
LHO/LLO RGA setups) required some new parts. The last of these
is
expected late this week.
Lab infrastructure-
With the lab floors recleaned, personnel wearing booties
and our house HEPA systems running the particle counts have returned
to
about 300-1000 particles per cubic foot.
This week was primarily spent preparing and
using the LDAS system in the
Hanford one arm test run. The version 0.0.10
of LDAS was mirrored up to
the sites over the weekend. On Monday the LDAS
system was started up at
Hanford. The start up process required modification
to the scripts and
the process for starting up was also updated.
This resulted in a more
easily start up but several issues remain and
a new strategy for bring
up the LDAS APIs which uses the managerAPI in
a more central role is being
planned for the next release. The log files for
the LDAS APIs also showed
signs of poorly deterministic starting of the
individual APIs, especially
when other cpu intensive applications such as
rsync were running. This is
being investigated further though there is not
a major problem since the
APIs do within a minute start up and are sensed
by the managerAPI. The
real issue that came up at the test run was the
enability of the lightWeightAPI
to ingest test data that simulated triggers from
the GDS DMT. The DMT
software had code to generate LIGO_LW table documents
which included a
possibility of null fields. This caused the lightWeightAPI
to occasionally
abort and to always enter a no response state.
Which required restarting
the API each time an attempt to enter data was
made. This bug has now
been fixed but it interfered with the ability
to ingest data online (Off-
line ingestion is possible now that th bug has
been fixed).
We also have had the dataserver workstation at Hanford stop responding
to requests two mornings in a row after the completion of the test
run. The
cause of this is not known at this time. However, the first loss of
the
dataserver also turned up an license expiration notice for our DB2
server
at Hanford. It was later discovered that the same license expiration
exists
at Livingstion but not at CIT. Mary Lei investigated this and determined
that the sites had DB2 6.1 installed on top of DB2 5.0 (which was not
the
case at CIT) and as a result had references in the license file to
software
that is part of DB2 but not part of our license agreement. It looks
like
removing a single file will resolve the license expiration issue at
the
sites but the test for this is being carried out today so a conclusive
statement will have to wait until after this report.
The new version of the FrameCPP software for the 4.0 specification was
completed this week. Alex Ivanov will begin testing this software both
internally and in collaboration with VIRGO before adding it to the
CDS
framebuilder. This will mark a major improvement in the data structure
of the frames and in the overall performance of using frames as has
already been seen in several internal LDAS tests.
Stuart Anderson,
Re-working the LDAS hardware
procurement plan.
Further investigation of
the CACR network data corruption that
effects retrieving data
from HPSS under certain circumstances.
Larry Wallace,
Ordered AIT-2 tape drive
to support LHO engineering run and
future LSC requests for
custom datasets.
Omar Rashad,
Kent Blackburn,
Replaced failed hard drive
in the LDAS linuxbox1 at LHO.
Omar Rashad,
Diagnosing ldas.ligo-wa
system crashes.
linuxbox1.ligo-wa is now
working properly after switching the hard drive with a
good one. The old
drive failed later diagnostics and is now being replaced.
Cleaned up some configurations
to be more secure.
Performed monthly backup.
Analyazing data available
via snmp for Sun machines, possibly to be incorporated
into a monitoring system.
Researched Fore ES-3810
configuration options.
Livingston:
Did receive some notices from LSU about network and power issues but
nothing bad
happened.
Ordering a number of PC's and upgrades in preperation for SURF and
others that
will be at the Observatory for the summer.
Hanford:
See Hanford report.
CIT:
Samantha Burned a number of CD's and is working on a standard build
CD to
facilitate installation of s/w on new computers.
Started rebuilding one of the older computers.
Suresh is working on the new documentation server (docuserv). Installed
Apache
(web server). Transferred dcc and calendar data from gsparc to it.
Barbara and
Linda will take care of the configuration of data on it. Documents
are
accessible through web only to LIGO systems.
Installed teTeX version 1.0.7 (tex, latex etc binaries) on sirius.
Still need
to work on various macros as needed to technical writting.
Completed last month's (March) scheduled monthly full backup of LIGO
servers.
Restored user's deleted files, modified few aliases etc.
Barbara fixed font problems on some of the web pages and made several
other
quick changes. Began work on page for the PSI as-built drawings.
Reviewed
revisions to LIGO home page with Gary.
Helped woman from SLAC who may be interested in procuring the DCC
database and web forms.
Wrapped up several issues concerning the inauguration videos.
Larry worked a number of procurement issues. Presently, looking at larger
disk
systems (300GB range) for data and user accounts. Odered switches and
other
related equipment for the NT server room. Have requests in for quotes
for a
number of items; PC's, UPS, SUN boxes, network equipment and s/w.
Worked out some network issues. There will be some testing going on
over the
next few weeks with the switch boxes and hubs during after hours.
Fixed a few printer issues. All were minor problems, things like paper
jams.
Fixed a few PC's. All were fixed by using Norton Utilities.
Attended the Internet World exhibit. The main theme was business to
business
tools and WEB related items.
I did have a few companies perform their tests for DSL availability
to the
Observatories, all failed.
From: "Ryan C. Lawrence" <rclawren@ligo.mit.edu>
Thermal Compensation:
Began work on wrestling the 3D PDE's for thermoelastic deformation into
a
linear 2D elliptic PDE (for the situation of cylindrical symmetry),
so I
can incorporate it into the 2D thermal model. Finished the signal
I/O
boxes for the galvos, and the galvos now function. Got the CO2
laser
controller back, and the CO2 laser works. Got a new probe laser
(635
nm
fiber pigtailed diode laser), installed it, and aligned the optical
system
into the wavefront sensor. I've got a general exam next week,
so all of
my energy for the next week or so is being poured into staving off
failure.
From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>
Soft Isolation development
Szabi: Oil bearings for IP shaker in production, pumps 3 in 1
coming
today. Actuators will use the old IP voice coils when we will
replace
them with the precision ones.
Advancing on MSE seismic noise playback program, problem with the MSE
position actuator
Giancarlo: Fixing the position actuator
providing the time domain simulation utility to provide the mass and
stiffness matrices for simulation controls for Virginio and Akiteru.
Virginio: Diagonalisation of IP controls. possible problem
with soft
springs reducing the diagonalisation contrast at low frequeny?
Sensor matrix diagonalised, probably driving matrix ready this week.
Acquisition program to replace the spectrum analiser with the DSP
working.
Found possible matrix inversion problem in Matlab, makes problems at
1
Hz.
Alessandro: Mounted minus-K table to provide a soft platform for
accelerometer tuneup.
Accelerometer dynamic range problem on this table, saturated by its
normal modes. For now replace electrostatic actuator back with
a voice
coil. electrostatic should be Ok as soon as will go on IP (after
Virginio finishes his development
Machine shop still to modify thin joint test pieces.
Hareem: Advancing on LVDT cables for creep, (preparing it for Lisa's
arrival).
old GASF load disks shipped, eta early next week.
Chenyang: writing report on zero gradient actuator (YOU SHOULD
ALL SLOW
DOWN SOME OF YOUR WORK AND WRITE, TAKE EXAMPLE)
preparing creep LVDT coiling setup.
Flavio: ADC problem found and repaired, but came back intermittently.
Contact problem?
Designing PCB labview to LVDT interface
received 830 nm Marconi lasers, will start tests next week
looking for fiber interface to make them safe.
New ADC DAC DSP shipped, eta next week.
Eugene: Thermal noise studies: does SAS have a clear advantage
over
stiffs? work ongoing.
Lisa: studying Italian to read creep thesis.
Akiteru and Kenji still M.I.J., hope they have good time, Akiteru is
suspected to be working on TAMAA suspensions.
Riccardo: paperwork, prepared updated report for TAG: final draft at
http://www.ligo.caltech.edu/~citsas/SASbaseline5Apr.pdf
From: Sam Richman <srichman@ligo.mit.edu>
Stiff isolation system (S. Richman, J. Rollins, S. Chatterji, J. Giaime)
We have included a cross term in the controller to compensate the
interaction between the upper stage vertical control loops above the
body
modes of the system, allowing a factor of ~1.5 increase in the gain
of
these loops. This interaction is still the limiting factor in
vertical
isolation.
A controller for the upper stage horizontal loops was designed and
tested. The horizontal and vertical loops were closed together,
with the
blending frequency between the inductive position sensors and the geophones
around 400 mHz. In the closed loop case, there is significant
excess very
low frequency (<100 mHz) noise, with motions of a few 10s of
micrometers. We are checking to see if this is due to an unwanted
feedback
path from residual geophone signal through tilt-horizontal coupling.
With all 6 upper stage loops closed, the 3 lower stage vertical loops
were
closed using geophones and position sensors.
From: Phil Willems <willems@ligo.caltech.edu>
Silicate bonding:
The strength of the hydroxy-catalysis silica-silica bonds made at Stanford
seems
to have increased to 400 lbs. of shear for a 1/2"-diameter bond.
This Friday we
will evaluate an ultrasonic flaw detector as a nondestructive test
of bond
strength. (Helena Armandula, Phil Willems)
Fused silica fiber strength:
We continue to measure strength of fibers with improved chucks.
Tests of a
commercial tensile tester gave very promising results (>4GPa for a
250um fiber).
(John Johnson, Phil Willems)
Q of coatings on fused silica:
We reanalyzed the data from an old experiment to measure the Q of a
LIGO test mass using new numerical mode structure calculations. The
data shows
no obvious correlation between mode Q and the degree of flexure of
the coating,
in contrast to data reported by the Glasgow group. In fact, the
two modes with
Q<<1e7 that are not suspension-limited both have very little
flexure of the coating, but a lot of flexure at the epoxied wire standoffs.
The
difference with the Glasgow result may relate to the difference in
the mirror
sizes, coating materials, and coating manufacturers. Therefore,
the Q of _any
specific coating_ should be measured before installation into LIGO.
(Dennis
Coyne, Phil Willems)
From: Helena Armandula <ahelena@ligo.caltech.edu>
Sapphire coating
Shipped 4 - 1" sapphire substrates to REO to be used in a calibration
coating run.
The parts will be coated over the weekend and two of them will be returned
to Caltech for evaluation next week. The other two will be measured
at REO.
The coating run for the rest of the 1" substrates will take place on
/around the 20th. of April.
From: James Mason <jim@ligo.caltech.edu>
RSE tabletop prototype (Jim Mason)
The design of the new voltage controlled phase shifters was completed
and the board sent off to the board house for manufacture. Work in
the
lab is more or less suspended until these puppies are done.
Progress has been made on the calculations of the noise couplings of
the laser intensity/frequency noise to the GW signal in frontally
modulated RSE. Results are still in the future; I've spent most of
the
time going over the preliminary calculations to convince myself I'm
doing it right. There are basically two difficulties: 1) When to toss
terms because they're supposed to be "small", and 2) How to generalize
the formalism in order to accomodate analysis of the different signal
extraction schemes that are currently under consideration. All in all,
it's not terribly hard, it just requires a good deal of attention and
patience.
For additional information about this report, contact sanders@ligo.caltech.edu