The LIGO Executive Committee Agenda for Monday July 12, 2004 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items:
Congratulations to Mike and Marilyn Landry,
who had a baby boy last weekend.
Breaking news from LLO: HEPI mechanical
installation is now complete in the corner station
and the gate valves are open!
no report
Status of LSC/MOU
Research Updates and Program Reports (Petrac)
LSC Research Updates through August 2004, and Progress Reports
through February 2004)
Balearic:
GEO 600:
National Astronomical Observatory-China (NAO-C):
Stanford:
IUCAA:
Rochester:
Groupe Virgo:
Virgo:
HETE II:
Site Teleconference
(Lindquist)
There was no site teleconference scheduled Thursday, July 8,
2004.
PROPERTY MANAGEMENT (Chargois)
>From: Ed Chargois <chargois_e@ligo.caltech.edu>
DOCUMENT CONTROL CENTER
(Turner, Mak)
>From: Linda Turner - turner@ligo.caltech.edu>
No report
> From: Cleveland Mak <mak_c@ligo.caltech.edu>
|
WE July 8, 2004 |
Packages |
Faxes |
|
In |
12 |
23 |
|
Out |
9 |
16 |
COST SCHEDULE CONTROL SYSTEMS (Cunningham,
Brambila, Kaufman, Salone)
>From: Esther Cunningham <esther@ligo.caltech.edu>
For ACCOUNTS PAYABLE HISTORY DATA: http://www.ligo.caltech.edu/%7Ephil/Weekly/AccountsPay.htm.
>From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
>From: Gina Salone <gsalone@ligo.caltech.edu>
>From: Florence Kaufman <fkaufman@ligo.caltech.edu>
Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport. (For passwords contact Florence)
>From: irena@ligo.caltech.edu (Irena Petrac)
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
SUPPORT (Baldon, Lloyd)
>Irene Baldon
>Dorothy Lloyd
ADVANCED LIGO (Cost
Schedule Control Systems) T. Frey
>From: Thomas Frey <tfrey@ligo.caltech.edu>
See Advanced R&D Section.
Reports (Lindquist)
Change
Control/Contingency (Lindquist)
I have saved a copy of a change request submitted by Albert
Lazzarini at:
http://www.ligo.caltech.edu/~phil/ChangeBoard/CR040013.pdf
The request is for additional budget for Hanford LDAS hardware and
maintenance. You will recall that some LDAS maintenance budget was
retained in planning packages at the beginning of the year to provide an
aggressive target as well as some budget flexibility. I propose to
discuss the change request during the next meeting of the LIGO Executive
Committee (July 12, 2004).
Human Resources (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Quality/Safety (Tyler)
>From: Bill Tyler <tyler@ligo.caltech.edu>
No report this week.
.
Summary of Commissioning Activities at
LIGO Hanford Observatory (compiled by L.Matone)
First of all, Mike and Marilyn Landry had a baby boy last weekend.
Congratulations!
This week we continued to work on reducing the high frequency bump in
H1's AS_Q. In the process of implementing a new crystal filter (elog),
it was observed that H1's noise floor (and power lines) had increased by ~10x
above nominal. This was finally tracked down to the REFL lambda/2 plate
controller not responding anymore (elog).
After the fix, more measurements of the crystal filter were made (elog).
It was also noticed how H1's acoustic coupling has significantly increased over
the past few months. See elog.
For H2, with the new Faraday Isolator installed, we measured the power of the
beams it produces (elog).
And the new H2 PSL layout (in order to match it to H1's) began this week (elog).
---------------------------------------------------------------------
L1 Commissioning highlights (Zucker)
---------------------------------------------------------------------
Another extremely productive week for HEPI commissioning. After last week's
demonstration of about a factor of ten suppression in the target band, using a
relatively simple control law, the team continued to improve bandwidth and
performance by integrating the onboard L4C geophone signals (now demonstrated
on at least two degrees of freedom). Substantial progress is also
reported in integration of the high-accuracy FIR filter supplied by Stanford
for tailoring STS-2 seismometer sensor correction, to remove the excess noise
at 30 mHz reported last week. Also a more robust, unconditionally stable
control law was introduced to replace the more fragile quick-and-dirty law used
for last week's tests.
WIth the expected completion of the HAM3 chamber alignment tweak tomorrow
(Friday) all HEPI heavy lifting will be complete. We will then open the LLO
beam tubes to resume full-interferometer commissioning.
LLO Seismic retrofit (Rich Abbott)
---------------------------------------------------------------------
1. Completed the re-alignment process for BSC-1 and BSC-2. Re-alignment
of the last chamber (HAM-3) is currently underway.
2. Most of our effort is being focused on preparing ITMX for control
under the HEPI system. By early next week, we should be in a position to
take system ID data on ITMX. As the electrical and hydraulic installation
is so close to completion, the other chambers will also be available for
checkout within a few days of completing ITMX.
LLO Facilities and Infrastructure (MZ for Allen Sibley)
---------------------------------------------------------------------
We have determined that the problem of back up HVAC chillers not coming on line
when needed are several poorly adjusted pressure switches. They will be
replaced as soon as replacements are acquired. HVAC software updates are still
being worked but there is good progress.
General computing (Roddy)
--------------------------------------------------------------------
* Current bandwidth usage can be seen at http://teche.ligo-la.caltech.edu/mrtg/LLO-Router/130.39.245.1_1.html
* Archived bandwidth usage can be seen at http://teche.ligo-la.caltech.edu/mrtg/archive/
under the dated folder for the week of interest.
* Usual rounds of account additions, etc.
* Started making backups with the new software. I have some bugs to work
out, but we are getting backups now on the file server and the web server.
This software seems to work pretty well. It has it's own way of doing
things, but so far it is manageable.
* Had a SCSI drive fail. I have sent in the RMA paperwork on it. Luckily,
there was no data on it. It was in the process of being installed on a
machine.
* Installed a new SunPCI 3 card in a workstation. Seems to work fairly
well.
* Testing an AMD 64 motherboard & CPU. So far it has great
performance. Currently
I am using it as a central syslog server and workstation, though this may
change in the future.
* Working on some billing issues with LSU for the gigabit line. Took several
phone calls and emails to get eveything straightened out.
CDS software support (Khan)
--------------------------------------------------------------------
1) Developing scripts to perform one button local damping of Optics
2) Prototyping an EPICS data collection system
S2/S3 Burst Analysis, AdL IO Modeling, and HPLF (Franzen)
--------------------------------------------------------------------
Finished the conversion and selection of the S3 Playground WaveMon triggers
produced on-line . Posted the results as text format files at
http://www.ligo-la.caltech.edu/~franzen/restricted/S3download/list.html
However, it was discovered that there is an excess in the number of triggers
with start time zero nanoseconds appearing with a periodicity around 60
seconds. This is probably due to a wrong setting in the WaveMon version running
during S3. We probably have to discard this set and rerun everything off-line
again. Trying to understand what went wrong.
Data analysis (Yakushin)
---------------------------------------------------------------------
LDAS admin:
1) Tested Condor at LLO at full load for several hours. No AC or power problems
found. Everything seems to be working fine.
Data analysis:
1) Rerunning waveburst on S2 after some corrections to the coincidence
algorithm and ldas job submission script.
2) Running waveburst on S3 playground.
for more information, contact Dennis Coyne coyne@ligo.caltech.edu
see also the CDS weekly meeting minutes in the commissioning archives:
Dennis Coyne reporting
Jay Heefner reporting
Anti-Image Board for Low Noise DACs
================================
- 10 boards have been received and are being stuffed. The first board is in test and should be ready for shipment to LHO by Friday. The other 9 boards should be ready for test by late next week.
LLO EMI Retrofit
================================
Continue to receive cables, connectors, feedthroughs and other parts for LVEA suspension systems.
AdL MC Triple Suspension Controls
=================================
Received BNC to Dspace ADC boards for LASTI installation. They will be stuffed and shipped to LASTI by the end of next week.
Ben Abbott
RFPD Redesign:
I am wrestling with ground loop problems in the interconnections of the RFPD. I think I have worked out a solution, and the layout should begin concurrent with the enclosure selection shortly.
Sander Liu
HEPI Opto-isolation
Couple of 40 meter long multi-mode fiber cables with ST connectors on both ends ordered from CablePlus still have not arrived. Waiting for a quote on price and delivery from a backup manufacturer (Fiber Optic Cable Shop in Richmond, CA).
[see also the LLO report for progress at the observatory]
Ken Mailand finished a general maintenance and service manual for the site HEPI Pump Stations, and will post it on the sei log and DCC.
Ken Mailand and Oddvar Spjeld have completed updates to the HEPI mechanical drawings and have submitted them to Dennis Coyne for review & approval.
[see also the LLO and LHO reports for progress at the observatories]
Mike Smith
TCS at LLO
Optical Bench: The second CO2 laser optical bench was assembled and aligned in the optics lab.
LVEA installation: Both TCS optical benches were installed in the housings and are positioned in the LVEA under the X and Y arm Zn Se viewports awaiting installation of the periscope mirrors.
Installation Procedure: The alignment and installation procedure was simplified, with explicit instructions on aligning the laser beam, the central heating beam, and the annular mask. A procedure was written for setting the size of the illumination beam at the annular mask. The revised document was distributed to the TCS team: T040014-02.
Cost Growth Analysis: A preliminary cost growth analysis was completed. Dave O. will complete it and revise it if necessary before submitting it to Dennis C. who will then make a request of the Configuration Control Board (CCB) for additional funding.
PeterKing
The machined pieces for my high power photodetector came in and a mechanical fit test was performed. No glaring problems were encountered although a mistake was made in one of the spacers that took the gloss off things at bit. I had drawn the part correctly but dimensioned it wrong.
A problem was encountered in one of my other photodetector circuits in which a ~2 MHz oscillation was present in the buffered output. This was tracked down to the feedback resistor forming an un-intended pole with the input capacitance of the OP-27 and was easily remedied. However the dark noise of the photodetector is about 1.5 - 2 nV/Sqrt[Hz] noisier than the high power photodetector for the same front-end electronics, so I suspect that there's a problem with the layout of the PCB.
Lee Cardenas, Liyuan Zhang
OTF Lab. (W. Bridge)
We have succeeded cleaning the third pair of ATF mirrors. We have installed
these mirrors and,
we got our previous transmission and ring down as well as beat frequency base
measurements.
These new pair gave us an improve of transmission power of ~15%.
By tomorrow, We'll be able to introduce the disks of TRA-BOND #2254 color light
brown epoxy
to be tested for contamination.
Absorption Test Measurement prototype in progress
Scatterometer system in standby
OTF Lab at Lauritsen ROOM 38
Cavity #3
The cavity is locked and we have optimized and improved its output power and
transmission. We have introduced (6) disks of TRA-BOND #2151 color blue epoxy
and recently (4) disks of TRA-BOND #2902 color silver epoxy.
After pumping and taking measurements we found out that there no evidence of
contamination as yet – more test time is required to establish whether these
materials meet LIGO requirements.
Our ring down (loss) and Beat frequency (absorption) have not changed
yet. So far these samples are still
in the chamber and we are taking daily measurements.
Cavity #2 Test cavity optical set up is still in standby
We are finishing up a paper on our
the results of our Sapphire measurement, and we are working on the next stage
of the TNI, a measurement of the rate of non-Gaussian noise events that
originate in the mirrors and suspensions. Akira Villar, with help from Jay
Heefner, has been designing an automated locking system that will monitor the
state of the TNI and reacquire lock if it is lost. Our SURF student, Jason
Sussman, has been working on an algorithm for monitoring the data stream in
real time and identifying events.
LASTI Weekly Report (Allen, Mason, McInnes, Mittleman, Ottaway,Pfau, Ruet)
Thermal Compensation System
All fabricated parts for the camera boxes and beam tubes came in. They were
assembled and shipped to Livingston and Hanford. We are also finishing the
design work on the TCS Interface board, started by Stefan.
Triple Suspension Alignment
The autocollimator and theodolite used for the initial alignment was set up and
used to align the triple suspension at LASTI. The pitch was easily adjusted
with the pitch adjuster and increaded osem range. The yaw was a little more
difficult as we had to push the structure for course alignment and then move
the optic with osems. This should work fine for triple suspensions but could
not for quad alignment. Myron and Laurent has been finishing up the
installation of the triple pendulumn and designing a system identification
program to use once the chamber has been closed.
Overall the triple installation went very smoothly, alignment went very
smoothly and was accomplished using a small amount of the range of the top mass
OSEMs. From my experience (Dave O) it was certainly no harder than installing a
LOS in Initial LIGO. Ken Mason is currently preparing a report on the
installation procedure.
ISC Periscope Investigation
David Pfau is working on the new cylinderical periscope. He is investigating
the reports from Hanford that the new design has a resonance around 280Hz.
Simulation and Modeling
(Bhawal)
WFS set-up at LLO
--------------------
Biplab calculated Gouy phase accumulation and the variation in beam-width along
the optical paths of WFS set-ups. The Gouy phases accumulated are in general
away from the optimal values for signals from target degrees of freedom and
need adjustment. Plots are posted in LLO elog July 2nd.
Effect of BS curvature and ITM heating
-------------------------------------------------------
(Hiro, Xiao)
The effects of the BS curvature and the heating of ITMs have been studied
using LHO4k configuration. The curvature of BS, -200km, induces an extra
phase of +0.02 on reflection. The transmission induces around 1/3 of this
effect. For the cold ITMy, the curvature of the field is 21km which does not
match with the mirror curvature of 14km. This curvature mismatch adds an extra
phase of +0.14. These two values, signs being the same, suggest that the effect
of the finite BS curvature induces a similar effect as differential heating,
ITMy is colder than ITMx. FFT program has been used to study this effect more
quantitatively, and the result is consistent with this argument. More
systematic study, including a validation using e2e is going on. Related plots
are available in
http://www.ligo.caltech.edu/~e2e/ME2ET/Minutes04/040707/
Simulation of Mach-Zehnder configuration
-------------------------------------------
(Monica) The Mach-Zehnder package has been completed for its first
configuration (ref. LIGO T040119-00-R-00-D 06/01/04): open and closed loop has
been evaluated but improvements have to be done. The new Mach-Zehnder
configuration (ref. 40m weekly report 01/07/04) is in progress.
40m/AdvLIGO optical configuration is almost ready.
Code development and maintenance
---------------------------------
(Melody) Modifying the modeler to process a .sim file, the modeler file which
contains consolidated box files information. Added the code to parse and
evaluate the .sim file. Tested using the SimLIGO files and validated that the
output are identical (from the ones generated by multiple box files).Currently
looking at making the code more efficient.
Alfi
-----------
(Bruce) Working on re-institution of bundle and bundler code.
LIGO Data Analysis System
Software Systems (Blackburn)
LDAS system performance continues to increase as minor improvements are made in
various APIs. Sustained throughput of close to 2800 jobs per hour is now
possible on the LDAS-DEV system.
System and integration testing on LDAS-DEV last friday found no new issues or
problems with the current code base. There was only one job to fail over the
long weekend test run out of the quarter of a million jobs run over the weekend
due to a none responsive thread in the dataConditionAPI under the RedHat9 SMP
kernel.
The support for compression type "diff_zero_suppress_short" from the
frame spec has been suspended since the method's reliability is in question.
User will be notified that this compression method is not supported in the
1.2.0 release of LDAS.
A bug was discovered and fixed in the new cache viewer window of the
controlMonitorAPI's client. The TCL layer expected the list to come back from
the C++ layer in a time ordered sequence which it didn't. The Tcl layer has
temporarily been changed to do the sorting while the necessary changes to the
C++ layer are implemented to do the sorting (see next paragraph).
The diskCacheAPI has been extended to carry out the concatenation and sorting
of frame data segments reported in a list to the Tcl layer for graphical
display in the new cache viewer window of the controlMonitorAPI's client GUI.
This has increased the performance an reliability of the interface
significantly.
Several minor edits were made to the TclGlobus website documentation in
response to questions raised during the annual review process for this project.
Hardware Systems (Anderson)
LHO (Greg)
1) the createrds.tcl and createrdsgui.tcl scripts that drive the rds generation
under ldas have been updated. The scripts now gracefully handle errors
when sourcing the resource (.rsc) and record files (.rec) and vet the input
parameters for reasonable values. The createrdsgui.tcl script now uses
the same .rsc, rec, lock and log files as createrds.tcl, i.e., Createrds.rsc,
createrds.rec, createrds.pid.lock, and createrds.log. The scripts are now
compatible with the new ldas feature that allows the user to set the usertype
field in the name of the output rds frame files (the second field in the name)
provided that usertype ends in a number (otherwise ldas appends a number to the
end of this type, based on the level of rds being generated).
The latest version of the scripts can be checked out from the
:pserver:anonymous@gravity.phys.uwm.edu:/usr/local/cvs/lalwrapper cvs
repository under the dsorun/contrib/createrds/scripts directory.
2) Contractors are currently installing pipes for the new 5 ton chilled water
AC unit for the LDAS room; another contractor will install the
electrical. This will not disturb access to LDAS or the Condor cluster
which currently has 200 CPUs available. With the new AC we should be able
to add back into the cluster the remaining 78 CPUs.
3) LSCdataFind crashed do to a configuration problem on July 1 at LHO but is
working again thanks to help from Scott Koranda.
LLO (Igor)
1) Tested Condor at LLO at full load for several hours. No AC or power problems
found. Everything seems to be working fine.
MIT (Keith)
1) worked on restarting LDR for S2 L1 RDS triple-coin frames
CIT (Al)
Was on vacation for most of the week.
1) getting a list of spare parts for CIT,LLO,LHO. Expecting a quote soon.
2) set up printers for M90 and Garrak, to use the new print que's
(Hari)
1) Tested gridcvs on Linux, works.
2) Had problems building gridcvs on Solaris. Got it to build dynamically,
currently testing that.
(Dan)
1) Continued the transfer of files from HPSS to SAM-QFS. Also continued
deleting files in HPSS after confirmation that they were successfully
transferred.
2) Received tape from LLO with missing S3 L0 data. Since I already FrCheck'd it at the LLO end, I just put it in the /archive file system where it will be used to make L1/L2 files.
3) Dealt with stuck staging (particularly from saiph) on the ldas-archive system several times.
4) Dealt with total HPSS meltdown over the weekend. Finally got HPSS running but not DCE hsi. Put in a request to Mike Gleicher about this, never heard back but it started working again. Still don't know whether this was because someone did something or not.
5) Did some research to show that the gaps in data showed by Mary's new cMonclient tool were due to an error in that software and that the data was really in the archive.
6) Had used old contract number
in T3 service call to Sun so I had to resubmit it with new contract
number. Still waiting on delivery of disk drive.
Data Analysis Activities (Lazzarini)
Creighton:
This week I've continued writing FrComputeFStatistic, a frame-reading version
of ComputeFStatistic.
Mendell:
Nothing significant to report this week. However, starting today I plan to
start putting as much time as possible into StackSlide again to get results for
the August LSC meeting.
Shawhan:
Provided comments to several of the speakers for several of the GR17 talks
run-through.
Going over the S2 known pulsar search, discovered that an incorrect distance
was used for one pulsar, and that updated distances (5-10% different) are now
available for several others. The upper limits on epsilons in the paper
draft have been updated accordingly.
Sutton:
I've spent this week examining the sensitivity of the S2 bursts analysis as a
function of the duration, central frequency, and bandwidth of the signals
sought. So far we've only examined a fraction of the signal space that we
should be sensitive to. I'll be giving a presentation at the next bursts
telecon on the subject. Also, I'm processing the WaveBurst S2 event triggers
for the joint LIGO-TAMA analysis. I hope to have a combined
TFClusters-WaveBurst- TAMA upper limit from the S2 playground next week.
Yakushin:
Rerunning waveburst on S2 after some corrections to the coincidence algorithm
and ldas job submission script.
Running waveburst on S3 playground.
General Computing (Wallace)
MIT (Keith):
-Attended Usenix Tech conference last week
-Worked on matlab licenses for urops
-Working on installing matlab R14 on desktop (license troubles using the FlexLM
server)
-Had 1+ second power outage this morning - trying to clean up desktop machines
Livingston (Shannon):
-Current bandwidth usage can be seen at
http://teche.ligo-la.caltech.edu/mrtg/LLO-Router/130.39.245.1_1.html
-Archived bandwidth usage can be seen at
http://teche.ligo-la.caltech.edu/mrtg/archive/
under the dated folder for the week of interest.
-Usual rounds of account additions, etc.
-Started making backups with the new software. I have some bugs to work out,
but we are getting backups now on the file server and the web server. This
software seems to work pretty well. It has it's own way of doing things, but so far it is manageable.
-Had a SCSI drive fail. I have sent in the RMA paperwork on it.
Luckily, there was no data on it. It was in the process of being
installed on a machine.
-Installed a new SunPCI 3 card in a workstation. Seems to work fairly
well.
-Testing an AMD 64 motherboard & CPU. So far it has great
performance. Currently I am using it as a central syslog server and
workstation, though this may change in the future.
-Working on some billing issues with LSU for the gigabit line. Took several
phone calls and e-mail's to get everything straightened out.
Hanford(Christine):
- Network usage can be seen at
http://www.ligo-wa.caltech.edu/~christin/mrtg/198.129.208.1_198.129.78.122.html
- The tape drive used to do the backups of the home accounts and mail server
has a dead power supply. The unit is still under warranty, but will have
to be shipped to the manufacturer for repair. Repair could take up to 10
days. Meanwhile I am creating tar files of the home directories and
backing them up to disk.
- The 5 SunBlade 1500s that I ordered back in March have finally arrived. I
will start setting those up ASAP. They are for the SURF students to
use, they are also replacing some Sun Ultra 10s that are obsolete.
- No word from PNNL as to when they want to swap over to the new GigE
network connection. The media converters that I ordered haven't showed up
yet, so we can't do anything until those get here.
- The usual user support for e-mail virus problems and printing problems.
CIT (Mike):
-Ran end of month ghost back ups on all NTSRV's.
-Erica D'Ambrosio: Loaded additional software on her laptop and updated GC software, security settings and office
updates.
-Searched for a Solid Works compatible video card for Ken Mailand. I went through his computer seeing what
software I have to load for a rebuild that I am scheduled to start on tomorrow morning
7/9. I also updated his e-mail client software.
-Setup an additional visitors workstation up on the second floor of W/B rm:
251.This required a lot of equipment moving around in order to complete this workstation setup.
-Finished up reloading three loaner laptops by updating General Computing
software, OS/office updates and updated security settings.
-The controller card on my workstation died this week. After running multiple diagnostics with Dell tech
support, they finally decided to send
me out another motherboard. My workstation is back up and running.
-Helped Larry Wallace surplus some old computer equipment.
-Lee Cardenas: I troubleshot a problem with a network connection to his
workstation. This turned out to be a dead network interface card. After
replacing this card his workstation is now back on the network. I also notice
many unsuccessful login attempts from unknown users. As a precaution I
have loaded zone alarm and updated his security settings to be safe.
-This week I ghosted Donna Tomlinson, visitors workstation, and all 8 NTSRV's.
-Other Misc. onsite/phone user support.
(Lisa)
- I was on vacation for most of the week.
- Reprogrammed the wireless access points.
- Working on the application server. I finally resolved the problems I
was having with the X11 tree, a dependency for some core applications.
I should be able to make better
progress now.
Mail Stats 07/01 - 07/07/04
Messages Accepted:
Spam Rejected:
Viruses Rejected:
False Positives:
Total Mail Thru:
(Veronica)
- LSC website: Updates to the Observational Results page. Set up a website for
the upcoming August meeting and posting updates as they arrive. The website is
ready to be installed. Working on ways to automate the process of generating
LSC author list.
- LIGO website: Updates to internal b/board, employment, meetings webpages.
(Larry)
-Setup and reworked a number of PC units. Two were new installs.
-Benchmarked another webcam. So far the one from Toshiba is looking the best for our need in the conference
room.
-Continued checking out different spyware detection programs. We've decided on
a pkg. and will be ordering it today.
-Checking out the different ultra-slim hard-drives for those that need more
disk space while on travel.
-Still working with the electricians that are updating the server room.
-Working on a number of documentation projects. The new GC web location is now
up and we are making additions to it. It should be quite informative in the
near future.
-Worked with Mike and Ed C. on getting some old and nonfunctional
equipment moved out.
-Working on a new storage space for some of the existing equipment.
-Assisted a number of users with different applications and h/w changes.
-Finished up a few items for the E2E servers.
-Regular account maintenance. Along the same line we will be making some
changes to the local alias lists that should make things a little cleaner.
-Worked a couple of orders that are late in shipping.
for more information, contact Dennis
Coyne coyne@ligo.caltech.edu
From "Thomas Frey" tfrey@ligo.caltech.edu
· · See http://www.ligo.caltech.edu/~tfrey/index.html for a complete listing of all project related cost and schedule data.
Accomplishments:
· · Sub-system PLANNING activities
n n ISC - Continued data input / changes. Preparing assumptions and questions..
n n Continue working on AOS and IO concurrent with ISC regarding scope movement to ISC.
n n Executed a telecom with Janeen and Justin G. regarding meetings with Pparc.
n n Followed up with David Ottaway regarding testing dates in LASTI, as requested by Carol.
n n Received progress data for the following sub-systems: TNI, SEI, COC, and LASTI. Spent some time with Larry, providing guidance on the best way to execute the update.
n n Continue to evaluate the effect of hammocks on percent complete calculations, and limitations of resource / cost loading exports.
· · COST BOOK DATABASE:
n n Re-evaluating the cost code structure, in anticipation of funding that crosses WBS phases.
From Dennis Coyne coyne@ligo.caltech.edu
From Dennis Coyne coyne@ligo.caltech.edu
· · PSI provided performance test data for the Phase 1 actuators. This data is being reviewed.
· · The prototype actuators were received on campus today. Mechanical inspection is expected to be complete tomorrow morning, and cleaning/baking scanning will follow: the large actuator should complete the scans on 15 July, and the small actuator on 20 July. I plan to send the large actuator to Kyle for a thermal vacuum test.
· · Larry & Jay had a telecon with ADE, the manufacturer of the capacitive position sensors, to discuss alternatives to the Tra-Bond epoxy (conductive & non-conductive) which had initially failed the optical contamination cavity test (when included with a 3rd epoxy). Recent tests, though preliminary, indicate that a switch may not be needed afterall. Aremco (manuacturer of the Ceramabond adhesive that we use in initial LIGO OSEMs) has recommended one of their products for use in ADE's application. testing on this alternative will being soon.
· · Joe, Brian, Larry and Dennis continue to work action items/issues from the successful Critical Design Review (CDR) for the BSC system.
From: Janeen Romie romie_j@ligo.caltech.edu
Working with Ian, Calum and Mike P-L on the ETM blade
drawings. Gina has extended the quote due date to July 16th. RFQs have gone out
to 4 companies. New updated drawings will (if Mike P. can fix the plotter) go
out by FedEx today.
Coordinating with suspension team on MC installation and testing at LASTI.
Working on the ETM Upper Structure Product Design Specification. Working on
Failure Modes and Repair Approaches paper.
Working with Caroline and Justin on costs and quantities of penultimate and
reaction mass blanks for the final design and for fabrications.
Working with Justin and Birmingham folks on osem costing details.
Working with Justin & Thomas on Advanced LIGO suspensions scheduling.
From: ctorrie ctorrie@ligo.caltech.edu
1. MC Drawings
All of the MC drawings are now ready for transfer and release to both the DCC
and the vault. A couple of minor issues have to be ironed out and then I will
transfer them for release.
2. Quad
Work is continuing on the drawings for all of the suspended items in the Quad.
it is hope to get all of these reviewed, released and out to on campus
workshops before MPL leaves Caltech at the end of the month.
3. Bench testing
Several parts have been ordered to allow us to complete bench testing of a new
magnet assembly , a suspended mass under load and to investigate the pitch of a
double pendulum. Other tests that are planned include testing a new concept for
the 4x4 eddy current damper on a suspended double pendulum to look at the
various adjustment mechanisms.
4. PDMWorks vault
The vault is up and running. I had hoped to have the documentation to the DCC
by today but it will now be by the end of the week.
The main reference document will be LIGO-D030382-05.
5. Blade Drawings
For several reasons there has been a delay in the process of obtaining quotes
for the blades. This is linked to inconsistencies with drawings, questions from
vendors and a delay in turning round changes. It is hoped that we will have the
quotes by the end of next week and that we can start procurement then. However,
we are also waiting for some other results form RAL.
From: Peter King pking@ligo.caltech.edu
I measured the capacitance of the GAP976 photodiodes. Compared to the GAP2000 photodiodes, the variation in capacitance is greater --- about 10 - 15 pF at a bias voltage of +5 V.
I lent Stanford an old pre-modecleaner for use in their saturated amplifier noise experiment as the one they were using showed signs of having a zapped PZT.
(Stanford)
The saturated amplifier noise experiment has been completed and the data obtained thus far fits the theory well. At present the results are being checked. The quantum noise picked up by the probe beam decreased as the amplifier pump power increased.
New pump diodes from LIMO have been ordered and these are expected in about 6 weeks. These should be better than those obtained from LaserLine, as the emission tolerances are tighter.
(LZH)
Optimization of the high power laser continues. Typically the laser has a warm-up period of between 20 to 25 minutes. It was found that the alignment of the mirrors was very sensitive to single mode operation. An attempt was made at injection locking the high power stage. The results of which I didn't quite make out during the lasers telecon but I thought that Maik had said that they got a unidirectional output of 65 W.
From: Helena Armandula ahelena@ligo.caltech.edu
Advanced LIGO Coating Development
CSIRO sent a report on the work performed to test the effect of ion bombardment assisted deposition on Young's Modulus of Ta2O5 films.
The films were bombarded by an oxygen/argon ion beam from an assist ion gun during deposition.
The Young's Modulus of the films was measured using a CSIRO manufactured ultra-micro indentation system (UMIS).
Changes on Young's Modulus were very small, within the sensitivity of the instrument.
Also, according to the report, " X-ray diffraction measurements of the above films have shown no evidence of possible ion-bombardment induced microcrystallinity, the as-deposited films being amorphous according to this test. The annealing of the films at 600°C for 2 hours did not change this result, however, at 700°C, a strong evidence of crystallization of the film was obtained. This is in agreement with other sources which have shown the threshold of microcrystallization of an initially amorphous tantala film to be somewhere between 600°C and 700°C."
From: Gregg Harry gharry@ligo.mit.edu
MIT Q Lab
We have measured the Q of 6 modes of a thin silica disk coated with Jean-Marie Mackowski's Formula 2, a silica/tantala coating with a higher concentration of titania dopant that in Formula 1. Without the dopant, phi_coat was about 2.7 10^-4, Formula 1 had phi_coat 1.9 10^-4.
Mode Frequency Q phi_coat
7 2706.3 Hz 8.9 10^5 1.6 10^-4
8 2711.1 Hz 8.8 10^5 1.6 10^-4
9 4100.9 Hz 6.8 10^5 1.9 10^-4
10 6164.6 Hz 8.4 10^5 1.7 10^-4
12 9463.5 Hz 6.8 10^5 1.9 10^-4
13 9464.7 Hz 6.1 10^5 2.1 10^-4
This shows two things; Formula 2 does seem to have slightly lower loss that Formula 1, so loss may correlate with titania concentration. Also, the loss does seem to be slightly going up with frequency, which has been hinted at in earlier data. We may try to get even higher
frequency modes if time allows.
A 30 cm long sapphire rod is now hung by two silk threads. We have been unable to get it hung with a single thread because the silk breaks. I suspect this can be corrected by teflon clamps rather than stainless steel we have now. We have used both greased and ungreased silk in the suspension. The lowest mode at 4 kHz has a higher Q than with the steel wires, about 4 million, but still well below what is expected.
From: Eric Black black_e@ligo.caltech.edu
TNI:
We are finishing up a paper on our the results of our Sapphire measurement, and we are working on the next stage of the TNI, a measurement of the rate of non-Gaussian noise events that originate in the mirrors and suspensions. Akira Villar, with help from Jay Heefner, has been designing an automated locking system that will monitor the state of the TNI and reacquire lock if it is lost. Our SURF student, Jason Sussman, has been working on an algorithm for monitoring the data stream in real time and identifying events.
Jay Heefner
Tested a possible variable gain amplifier for the Arm Cavity Servo. As time permits the design of the board and the lock acquisition software will be completed.
From: Riccardo DeSalvo desalvo@ligo.caltech.edu
SAS
We sent three Pomona College exchange students to Italy to work on Virgo and LIGO related R&D issues. One more student from Berkeley is working on Virgo itself.
Three Italian students will arrive in a week, Ester Guidi working with Flavio Nocera on LIGO electronics, the other two, Francesco Costagliola and Simone Napolitano will work in SAS on suspension developments.
The first of the Pomona students, Justin Kamp, is working with Alessandro Bertolini to, hopefully, finalize the Ultra Sound Milling Machine that we built more than one year ago.
The other two, Randal Burns and Jessica Strand we sent to work in tha salt mines. They are working with Fabrizio Barone measuring and interpreting seismic noise amplitude correlations in a salt bed inn the Realmonte mine, and studying the possibilities of Newtonian Noise cancellations in spherical caves centered around the test masses.
All of them left last week, Justin already sent a, somewhat informal weekly:
Ciao Riccardo,
You come from a beautiful country! So far I have been to Roma and Firenze, which are both outstanding, but perhaps the most amazing thing I have done has been bike rides in the rural areas surrounding Pisa in Tuscany. It reminds me of the countryside where I am from. Regardless, we have already gotten a fair amount of work done on the milling machine. Yesterday we ran a test to get an overall idea of what had to be accomplished. There are quite a few bugs, but
I'm sure we will find success. Ciao.
Justin
The Geophones have been installed at Realmonte in the last three days (unfortunately before Jessica and Randal could help) and data is starting to flow.
Anamaria
This week I managed to install the new setup, with smaller spacer between blades and a much better wire (thinner and shorter) so that beatings between vertical and horizontal modes will no longer interfere with low frequency data acquisition. I began to take data and learning how to analyze it, found an expected dependence of the frequency from the oscillation amplitude otherwise nothing too interesting yet.
Also I tested the data acquisition program to make sure it acquires data correctly and has no delays due to data saving it turned out ok.
I also changed the mass for Maddalena's measurement, so that the range of the working point can be taken at higher range before the integrator voltage saturates; and am currently taking data at the high end of the interest range on that experiment.
Liquid Metals is finally providing 4 samples for the measurements: two of LM1, fully glassy, and two with LM2, stabilized with cristalline dendrites. Giulia DeSalvo, high school student volunteering for the summer in Bill Johnson’s group will assist in getting the blades to us and get them processed to build two sets of GAS blades for the comparison with Maraging and CuBe.
Nicky
This week the components for my oven arrived and they are almost completely assembled (with the filter inside already). The payload needs to be mounted. The PID controller that will measure and control the temperature turned out to be not adequate, we ordered a different model. We have to mount the position monitor. I also continued to help Barbara's interferometer, we started mounting the definitive ballast masses and the tuneable springs. I also cleaned up the lab.
(This I find extremely commendable, she is the only person so far that does it without me pointing the gun!, THANK YOU, RDS)
Juri
Mainly preparing the GR17 presentation and poster.
Yanyi
More work on the circuit components and layout.
Maddalena and Barbara
Both done the last exam in Pisa. Barbara is coming back next week to resume the assembly of her interferometer. Maddalena is preparing the defence of her Master thesis.
Riccardo
Next week going to Pisa for Maddalena’s defense, meetings with Virgo EGO and CEGO, and for the GWIC meeting.
For additional information about this report, contact whitcomb_s@ligo.caltech.edu