The LIGO Executive Committee Agenda for Monday March 7, 2005 will be:
(Meeting time: 10:30 am Pacific Time)
LIGO has a new Assistant to the Director/Deputy Director, Julie Hiroto. She begins work Monday March 7 and will be located in 102 E Bridge. Her phone will be x3064.
Attendance: Bruce Allen, Sam Finn, Joe Giaime, Albert Lazzarini, Irena Petrac, Dave Reitze, Keith Riles, Peter Saulson (minutes), Bernard Schutz, David Shoemaker, Daniel Sigg, Rai Weiss, Stan Whitcomb, Benno Willke, and guest Norna Robertson
Preparation for the first meeting of the LSC MOU Review Panel is progressing well. Most member groups' reports have been sent in, and are available to panelists via a web site maintained by Irena Petrac. Albert Lazzarini and Alan Wiseman have organized the assignments of readers, and an agenda has been prepared for the meeting 4-5 March at MIT.
Bruce Allen reported that Einstein@Home was read for launch on 19 Feb. [The launch did indeed take place on that day.] Bruce noted that things were already working very well in the testing phase. There were 17,000 registered users, yielding 12,000 active hosts or the equivalent of a 9,000 node cluster. He expects that a scaling up of a factor of ten ought to be easy, with a factor of fifty perhaps possible.
Norna Robertson reported on the organization of the election for Spokesperson. The Nominating Committee, which she chairs, had assembled a list of two candidates, Dave Reitze and Peter Saulson. She has solicited statements from each of them; when they are received, the committee will share them with the LSC and conduct the vote. [The election is now taking place, with the results to be announced by the time of the March LSC meeting.] Sam Finn asked if there was going to be a provision for LSC members to make additional nominations. Norna said no, the Nominating Committee had solicited nominations already, and was only asking for votes for the two candidates on the ballot. There was some discussion of this question; the consensus was that this was a reasonable procedure and in accord with the LSC Charter, but that the question could be revisited in the context of writing the revised Charter (or relevant by-laws) for future elections.
Stan Whitcomb reported on behalf of the committee (himself, Albert Lazzarini, and Rai Weiss) looking into the organization of a LIGO Thesis Prize. They proposed to award a prize every two years, with the choice being made by a committee selected by the Spokesperson for that round of awards. No member of that committee can be a thesis supervisor of any of the nominated students. The award should be made every other August (at the LSC meeting), starting in 2005, for theses defended in the previous two academic years. The LSC Exec Comm was very pleased with this proposal, but agreed with a suggestion by Sam that the final vote to set up the prize should be taken by the LSC Council at the upcoming March meeting.
Request to add John Cannizzo to author list of GRB030329 paper:
Szabi Marka had asked that John Cannizzo be added to the author list of the paper about to be submitted on the search for signals from GRB030329. In his request, he pointed out that John had been the key expert for the External Triggers group on the theory of GRBs, and was overall one of the most important contributors to the analysis. The consensus of the LSC Exec Comm was that this was an easy case: John is already an LSC member, and we have already voted to dissolve soon the LIGO-I distinction (beginning with papers using S4 data.) Thus, there was universal agreement to the request. [The paper has now been submitted to Physical Review D.]
Keith Riles offered to host the 4-5 June Observational Results meeting in
We also discussed the August meeting at LHO. Tentative dates are Sun-Wed 14-17 August. A few members (Sam, Bernard Schutz) may have difficulties with the date, but an alternative of a week later encounters other difficulties with the start of many members' academic year teaching commitments. We agreed to "pencil in" the 14-17 August date, and to confirm it at the March LSC meeting.
David Shoemaker and Norna Robertson presented a draft of a new LSC Charter. The drafting was motivated by the ongoing restructuring of the relationship between the Lab and the LSC. Sam Finn and Peter Saulson also participated in the drafting, and several other LSC Exec Comm members gave important comments during the drafting process to date.
There were a number of constructive criticisms of the draft as presented. Most focused on the proposed new structure of the LSC Executive Committee. In the new draft Charter, an effort was made to strengthen the legitimacy of the Exec Comm, by having membership determined by an election process. In turn, most of the seats would be filled by elected heads of various working groups of the LSC. It was this last point that got the most criticism, because it necessitated specifying the various committees and working groups of the LSC in the Charter in some detail. The drafters received clear guidance to try to find some way to come up with an elected Executive Committee while simultaneously allowing the committee structure of the LSC to evolve as necessary.
Several members spoke up in favor of ensuring that the Executive Committee contains a good representation of people with the highest level of technical expertise (which would have been automatic under the draft presented but which needs to be thought about again as the draft is revised.) There was also discussion about ensuring that the Spokesperson has sufficient power to do his/her job. An interesting exchange occurred concerning how to think of the LSC Executive Committee; Rai proposed it was best thought of as a body that advises the Spokesperson, but Stan and others countered that what we need to do (by making it elected) is to ensure that it has the legitimacy to act as a proxy for the LSC Council.
There was also discussion about the proposed extensions of voting rights (on some issues) to people other than Council members, and on the procedure elaborated for approving scientific results. Joe said he thought the rules seemed too complicated, and ought to be simplified.
David and Norna agreed to revise the draft in light of the comments expressed at the meeting. The plan is for them to submit a revised draft to LSC members several weeks before the March LSC meeting, so that it can be discussed at the Council meeting. If things went extremely well it might be adopted then; another possibility would be another round of revisions, leading to a document that could be adopted in August.
STATUS
OF LSC MOUs (Petrac)
LSC MOUs and Research Plans
and Progress Reports
Most LSC groups have submitted their
research plans for 02-15-05 to 08-15-05 and Progress Reports through February
2005. These are undergoing LSC review.
For a web page summary showing the status of LSC MOUs and associated Attachment
updates see:
http://www.ligo.caltech.edu/~irena/Revstatus/Reviewstat.doc
Non-LSC MOUs
SITE
TELECONFERENCE (Lindquist)
A site teleconference was held on
Thursday, March 3, 2005. The following items were among those discussed:
PROPERTY
MANAGEMENT (Chargois)
>From: Ed Chargois
<chargois_e@ligo.caltech.edu>
·
Assisting Caltech's Property Branch with the Campus
wide inventory.
>From: Linda Turner - turner@ligo.caltech.edu>
>From: Cleveland Mak
<mak_c@ligo.caltech.edu>
COST
SCHEDULE CONTROL SYSTEMS (Cunningham, Brambila, Kaufman, Salone)
>From: Esther Cunningham
<esther@ligo.caltech.edu>
>From: "Brambila,
Ruth" <Ruth.Brambila@caltech.edu>
>From: Gina Salone
<gsalone@ligo.caltech.edu>
>From: Florence Kaufman
<fkaufman>
SUBCONTRACTS
MANAGEMENT (Petrac, Jasnow)
>From: irena@ligo.caltech.edu
(Irena Petrac)
>From: Ed Jasnow
<jasnow@ligo.caltech.edu>
SUPPORT
(Baldon, Lloyd)
>Irene Baldon
>Dorothy Lloyd
PROPOSALS
and REPORTS (Lindquist)
Addressing budget short fall issues
for FY 2006 through FY 2008..
DCC Steering
Committee (Lindquist)
The DCC Steering Committee met March
2, 2005. Completed first pass discussion on the requirements
matrix. Will now attempt to distill requirements to a shorter list and
prepare a list of potential products to be evaluated. The next meeting of
the DCC steering committee is scheduled for Tuesday, March 9, 2005. The
location has been moved back to the ECR.
CHANGE
CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
>From: Cindy Akutagawa
<cindy@ligo.caltech.edu>
Quality/Safety
(
>From: Bill Tyler tyler@ligo.caltech.edu
No report.
Summary of
Commissioning Activities at LIGO Hanford Observatory (Landry)
The science run is off to a reasonable start at LHO, despite some concerns on
both interferometers. Duty cycles to date for S4 are: H1, 75%, and H2, 81%.
Ranges are typically 7 to 8Mpc on H1 and 3.5Mpc on H2. Problems being monitored
include increased noise on ASPD 2 and 3 on H1, possibly due to alignment and/or
burn spots on the photodiode, and a new wandering line near 1190Hz on H2.
Some highlights from the run are bulleted below. Please see the elog
for more details.
At 4 AM local time on February 24rd we experienced a several hours long interruption of power due to a failure in the DEMCO (local power utility) substation. Repairs took several hours, and on recovery our power line voltage was quite unstable. Despite these problems all systems were recovered and we went back to Science Mode at 5:30 pm on the 25th. On late Sunday the 27th and early Monday the 28th we had unusually high seismic activity, which interfered with our ability to lock. Subsequent to this we found instability in either the Common Mode or Mode Cleaner servos, which interfered with our ability to run the interferometer in power up mode. Investigations into this are continuing, and we have had scheduled interruptions of data taking in order to characterize the problem. In the interim we are operating at reduced laser power.
The HEPI system is performing exceedingly well, the only seismic activity, which seems to routinely interrupt science mode comes from earthquakes. These cause motion below 0.1 Hz where HEPI is not designed to provide suppression. Coincident with the power outage troubles we seem to have also regained some sensitivity to trains, although not all trains cause lock loss.
Even in the non-optimal configuration the interferometer locks stably for several hours at a time with an Inspiral range of ~ 5 Mpc (this compares to a range of ~6.5 Mpc in full power-up mode). Our duty factor in this mode is comfortably above 70%. Without interruptions for diagnostic tests it would easily exceed 90%.
We anticipate some downtime in the coming week in order to install a new crystal oscillator, which should reduce our high-frequency phase noise. We also hope to return to our optimal running power and then concentrate on collecting science data for the remainder of the run.
The only commissioning activity this week was to recover from the power outage last week. The common mode servo has been unstable since the power outage. We're still not able to increase the power into the interferometer from 1W to the nominal 2W due to this instability. The Mode Cleaner and frequency servo open loop transfer functions were measured but no smoking gun has been found so far. The interferometer inspiral range went down from 7 to 5 Mpc due to lower input power. The duty cycle has been high with reduced power over the last two days (for the 24-hour period ending noon yesterday we had 92% uptime).
1. established date for LEPAC
and initiated agenda; forwarded final draft to Barry for comment.
2. established date for LEN;
researched LEN plan: much ground work required here.
3. drafted support ltr for
Tangi schools PD.
4. reviewed two exhibit
labels with Dale.
5. drafted agenda for
Directorate teleconference.
6. researched solar telescope
needs.
7. Initiated summer 2005 LLO
RET process.
8. Initiated draft agenda for
Congressman Baker's visit.
no report
no report
Due to the power outage I lost the motherboard and the internal hard drive on our applications and backups server. Sun came out and replaced the failed components. I spent all of Friday rebuilding the OS and services on the server. There are still some bugs to fix on it.
Spent most of Monday trying to get the new Dell server repaired by Dell. It had a bad DVD-Rom drive and I had to spend most of the day on the phone with Dell to convince them that the drive was bad. After convincing them, they sent out a replacement drive. This fixed the problems I was having installing the OS, but I am still having some issues with this server.
Evaluating some commercial PGP software for use by windows users. There have been some issues with it and I am going to evaluate a couple alternative packages. The mail server did not come back up happily after the power outage. For some reason RAV refused to function after the reboot and I had to spend quite a bit of time reconfiguring the mail server. This will force me to move off of RAV and install CanIT, etc., which we have been needing to do for a while.
There were lots of miscellaneous problems to work on after the power outage. Converted a couple of matlab licenses for a couple users who made a platform/OS change.
Made some configuration adjustments on the firewall due to LDAS and a couple of other issues. Started looking into a VPN issue on Linux. Still unsolved at this point.
#MZ ADDS: Shannon also accomplished a major coup (much engineering, some politics, and a bit of psychology) and got the network to support realtime streaming of S4 data back to Caltech; Stuart Anderson writes:
"Shannon,
we have made it through our first 24 hour period of sustained high-speed LLO
frame data transfer. We are now averaging 7-8Mbyte/s and are catching up on S4
data at a rate of 40 hours of full frame data every 24 hours. It should take
about 1 week to catch up to S4 real-time data generation. Thanks for all your
hard work on this."
no report
1) The people at IPG finished the production and installation of the new fiber block Monday February 28. Since then the repaired laser have been tested. We are waiting for the outcome of this test, which should arrive March 3 (today).
2) Have continued to modify the Melody Advanced LIGO mode cleaner model. The goal of this is to investigate how much better the reflected MC carrier beam would be if we inject from the curved mirror instead of one of the flats at high power. I think I have a working version. Am having several OS, Matlab and Femlab installation problems on my desktop which started when I upgraded my machine to FC3. At the moment calculations are performed at decatur which is rather slow.
1) After some changes in GC, ldas-jobs lost its ability to mount user home directory on Saturday, which caused createRDS jobs to fail. After Shannon fixed GC configuration the scripts were restarted. It was decided to move createRDS jobs from ldas-jobs to gateway not to depend on GC.
2) Publishing script for /frames crashed on Feb 28 and online jobs were stalled for a while until the script was restarted.
Working on automatic
postproduction of triggers produced by online wave burst jobs.
see also the CDS weekly meeting minutes in the commissioning archives
Rolf Bork
Jay Heefner reporting
Fiber Optic Timing Link (Sander)
LSC RFPD (Ben Abbott)
I have made up a list of the available photodiodes that can be allocated to necessary frequencies. I will mail the list to people in the know, and figure out what frequencies will go out in the next round.
John Zweizig
This week I managed the DMT machines for S4 and worked on getting early S4 Data Quality feedback.
Peter King
nothing new
Mike Smith
1. Both IFOs locked
I calculate that approximately 1E-7 W may be scattered from the arm cavity of the 2K IFO directly into the 4K IFO mode, and vice versa. The arm cavity baffles would prevent this scattered light coupling, but they are not in place. (In fact the arm cavity baffles can't be put into place, as currently designed, or they would interfere with the TCS beam.) After discussions with Hiro, he pointed out that this will produce a negligible coupling of the 2K arm motion audio sidebands into the 4K IFO detection port because the displacement amplitude of the locked 2K mirror is extremely small.
2. 4K IFO locked, 2K IFO unlocked.
The scattered light from the 4K IFO may retro-reflect from the "wildly" swinging 2K IFO mirror and re-scatter into the 4K IFO. The similar scattered power of 1E-7 W will have much larger phase noise from the uncontrolled 2K IFO mirror. In this case, audio side bands from the 2K IFO motion may appear in the 4K IFO detection port. (It is not clear that the arm cavity baffle, were it in place, would suppress this light coupling.)
Lee Cardenas, Liyuan Zhang
OTF Lab. (W. Bridge)
This chamber still has two samples, white Ceramabond, and disks of TRA-BOND
#2254 color light brown epoxy. Cavity has been recovered and locked.
Absorption Test Measurement prototype shut down
Scatterometer system in progress
The fused silica 2ITM02 is in the scatterometer enclosure for
for beam scattering. It needs to be cleaned.
We have checked a 1.00" inch 70ppm mirror and took the scan and the
result is the same as before.
The fabrication of a new mount to accommodate one inch mirror under the
scatterometer is done
The Quantronix 60 watt laser is in standby
OTF Lab at Lauritsen ROOM 38
Cavity #3
The contamination test for (6) disks of VAC SEAL Epoxy samples has
been completed and the result shows to be clean/acceptable
We have introduced a new sample into the chamber. (20) pieces of Glenair, Micro-D-connectors for
contamination test. The test is in
progress. Cavity is locked and we are taking measurements for absorption
and ring down for contamination loss every day.
Cavity #2 in progress
We continue the assembly of this cavity.
· This week, Jay and Alex finished installing linux and the control software for the TNI's new computer, including modifying the kernel. The framebuilder data-acquisition box is almost done too.
·
For the bond-noise
experiment, Akira has completed the pulley system for the bell jar, and he is
working on the optical layout. A new breadboard is also being machined to go
inside the vacuum chamber and support the fiber suspension cage.
No report.
I did a simplified Mathematica
quad model similar to the triple of last week. For AdvLIGO I used it to
generate a set of symbolic matrix elements in Matlab format that models the
blades more accurately than the old GEO code. For e2e I used it to generate some
numeric state-space matrices that will be efficient for time-domain simulation.
I also tidied up and posted http://www.ligo.caltech.edu/~mbarton/SUSmodels/ a
lot of the stuff I've been working on recently including v2.0 of the modeling
toolkit, the new simplified triple and quad models and new manual, T020205-01.
Worked with Mike Smith to
calculate the scattering noise
Worked on analysis of
differences in images of sidebands at dark port under various thermal states
represented by simple assumption of variation of refractive indexes of input
mirrors.
Studied how the resolution of
the camera and its dimension may affect the accuracy of modal information
obtained from its images. Started
putting all studies in a new document.
E2E simulations for the Power
Recycling case and Signal Recycling case: Twiddle and E2E simulations match
very well in the first case, still some differences for minor signals are found
in the second case. In order to understand the discrepancies, the evaluation of
error signals in the DC case both for Twiddle and E2E has been done.
Worked with Sany and his students
of Southern Louisianna University to setup their computers so that they can use
and upgrade easily e2e and SimLIGO.
The expression template in
matrix class has been rewritten. The new implementation allows to handle
expressions without explicitly defining the expression. This is part of the
efforts to speed up the calculation of the state-space based simulation of
mechanics.
Worked on dealing with unresolvable connection types. Sometimes connections
extracted from bundles are not immediately resolvable but must still be tracked
until they can be resolved.
·
Misc problem report bugs.
Worked on fixing existing Problem reports. Currently working on disabling/enabling
appropriate menu items (PR 371).
Also looked at issues concerning upgrading ALFI to use Java 1.4.2 and Java
1.5.
[LDAS]:
Worked on a fix to the frameAPI to allow merging of frames from LLO,
LHO and possibly GEO, which are not aligned due to IFO drop outs unique to the
individual sites. A 1.5.1 release of LDAS will be pushed out with this fix
prior to the completion of the science run to enable custom frames after the
run to be generated.
Upgraded the IBM DB2 database to 8.2.1 on the Tandem4 system to verify that
its compatibility with LDAS. It does require a rebuild against the developer's
toolkit to run, but the performance is about 50% better with this upgrade. This
will migrate onto the other LDAS boxes after the 1.5.1 release.
Identified a unique source of the memory leak in seen on the Tandem systems
in the dataConditionAPI. It appears to be associated with a single job
class (the burstwrapper datapipeline jobs). When these jobs are taken
out of the mix (and the mix is made the same as on the LDAS-DEV system) the
memory leak is consistent with that seen on the LDAS-DEV system. Further
investigation will be needed to understand what it is about the burstwrapper
jobs that triggers the 5000x increase in the memory leak.
The creation of RDS frames at LHO and LLO continues to go smoothly.
The LDAS CVS repository is in a
code freeze awaiting the fixes to the frameAPI needed for merging nonaligned
framesets due to drop outs.
[Tcl/Globus]:
·
One Globus I/O function is still buggy in this
package:
globus_io_secure_authorization_data_get_callback()
[Grid]:
·
Continued to work on getting the OSG testbed up and
running. A reinstall of the operating system had to be performed on Monday due
to a mysterious hardware failure. In addition, a new version of the OSG
software was released and the testbed was upgraded to the latest release. The
integration group intends to have a new release each week while the testbeds
around the country are being evaluated.
·
We currently have everything but the Condor computing
components back up and working. A complication with condor exists due to the sharing
of the nodes with the LSC Data Grid and an existing condor that is not the
spec'ed out condor for OSG being reserved by the system administrators of th
LSC Data Grid. We are trying to figure a way to have the two versions co-exist
at this time.
·
We began looking into the installation of
"Ganglia" onto the OSG testbed. The official "word" from
the integration group is that this product will be optional, but many of the
monitoring tools for OSG, e.g., Monalisa, need it installed.
[Caltech]
(Dan Kozak)
(Phil Ehrens)
(Stuart Anderson)
[MIT]
(Keith Bayer)
[Livingston]
(Igor Yakushin)
[Hanford]
(Greg Mendell)
S4 data archiving and RDS generation has been running smoothly at LHO and
LLO for the most part. Minor network problems at both sites caused scripts
driving RDS generation to hang last Saturday. These were restarted and caught
back up to near real-time generation without loss of data. Except for the power
failure at LLO, there are no unexpected gaps in the data so far.
(Ben Johnson)
(Shourov Chatterji):
·
The S2 H1H2 double coincident burst search is complete
and final results have been posted at http://ligo.mit.edu/~shourov/q/results/.
(Vuk Mandic):
·
With Peter Shawhan, I worked on the software needed to
automate hardware injections into the interferometers. We also performed a
number of inspiral and stochastic injections.
·
I worked on the follow-up stochastic analyses needed
for the S3 stochastic paper.
·
I started working on a code for studying instrumental
correlations.
(Greg Mendell):
A major reorganization of the StackSlide code was checked into lalapps/src/pulsar/StackSlide
on Feb 28, 2005. This splits the loops over the parameter space for the search
for CW waves from binary and isolated stars into two modules:
StackSlideIsolated.c and .h and StackSlideBinary.c and .h. This will make the
code for these two types of searches easier to develop. Otherwise, the main focus
now is on making further comparisons between the Hough, StackSlide and
PowerFlux codes and preparing the StackSlide code to generate S3 results for
the March LSC meeting.
(Peter Shawhan):
(Patrick Sutton):
·
During the past two weeks I visited Japan to give a
talk at the TAMA symposium on the status of LIGO data analysis, and to meet
with TAMA people to discuss S2 and S3+ analyses. Nobuyuki Kanda and I agreed on revisions to the LIGO-TAMA
MOU, and I've circulated the revised draft to the joint working group for
comments. I'm now making final edits
to the LIGO-TAMA bursts paper before it is released to the full collaboration.
·
I also produced the full-data-set MDCs for the S3
LIGO-AURIGA joint analysis. The
frames have been published thanks to Anderson, Johnson, and Kozak.
(Igor Yakushin):
·
Working on automatic postproduction of triggers
produced by online waveburst jobs.
CaJAGWR: Captured and compressed a video of the last week's seminar.
Website updates.
Adv. LIGO Systems
from Dennis
Coyne
See also:
Planning
· reminder: installation sequence/plan discussion will be an agenda item for the SUS breakout session at the upcoming LSC meeting (a follow up discussion to a presentation/meeting last October)
Records Of Decision or Agreement (RODA)
See also the RODA
status web page
· Justin Greenhalgh (RAL) has revised the OSEM Count RODA, M040088, with reference to the UK work scope document, M030162-04. Draft circulated for comment/review.
Requirements
· nothing new.
Interface Issues
See the "Interfaces" section of the AL Systems web page
· Continuing coupled SEI/Quad dynamics analysis in modal basis -- a report is being prepared. Have also started to integrate a more up-to-date SUS structure model.
· Reminder: AL PSL DRR, 3/24 8:00-11:00 CT
· other reviews in the near future are listed below. These reviews have possible (early) completion dates in CY2005 according to the project Primavera schedule (though many have late end dates well into CY2006):
|
Date |
Subsystem |
Review |
Topic(s) |
Enabling
event(s) |
Schedule
motivation |
|
3/24/2005 8-11 CT |
PSL |
DRR |
design
requirements & conceptual design |
laser
design approach selection, definition of PSL system requiements |
enable
preliminary design work |
|
April, 05 |
SEI |
BSC
Critical Design Review 2 |
update on
actions from M050025 |
|
timely decision
on proceeding with SEI/BSC prototype for LASTI for integration with the SUS
quad prototype |
|
June, 05 |
SEI |
BSC
Critical Design Review 3 |
review
results from ETF testing & recommend prototype fab |
completion
of ETF initial functional & performance testing; completion of model
based extrapolation to BSC |
|
|
~Aug, 05 |
SEI |
HAM
Critical Design Review |
Recommendations
w.r.t. HAM prototype development based on ETF results |
Completion
of SEI/BSC critical design reviews; LSC review of ASI HAM configuration
design |
timely
decision on proceeding with SEI/HAM prototype |
|
April, 05 |
SUS |
PDR,
Review 1 |
Requirements
update |
completion
of the DRD update |
ensure
RAL effort working on proper baseline |
|
~July, 05 |
SUS |
PDR,
Review 2 |
Quad
design |
Completion
of the quad controls prototype assembly & installation at LASTI; |
timely
transfer, to RAL & UB efforts, of lessons learned from the controls
prototype |
|
~Oct, 05 |
SUS |
PDR,
Review 3 |
quad
controls prototype test results |
completion
of LASTI testing |
timely
incorporation into final design effort on the noise prototype |
|
TBD |
SUS |
PDR,
Review 4 |
BS, FM/ITM
SUS design |
design work
completion (has yet to start on FM/ITM, not mature for RM) |
|
|
TBD |
AOS |
Stray
Light Control, DRR/CD |
|
SYS PDR? |
primavera
late finish 6/15/05 |
|
TBD |
AOS |
Thermal
Comp., DRR/CD |
|
SYS PDR? |
|
|
TBD |
SYS |
PDR,
Review 1 |
|
completion
of generic requirements definition; completion of first draft of ICD;
revision to optical layout; establish integrated opto-mechanical equipment
layout |
timely
system level definition enables/helps define subsystem reqmnts & design |
|
TBD |
IO |
PDR |
|
SYS PDR? |
|
|
TBD |
COC |
PDR |
|
SYS PDR? |
|
Progress Period from 02.25 to 03.03
Out of the office on 03.01
· 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
§ Continued work on preparing web space for posting Adv. LIGO reports. ("The Whole Enchilada")
§ Continued work on the 40-Meter schedule changes.
§ Executed telecoms with Carol and Dwight.
· ROSTER DATABASE:
§ Assisting Irena as needed on record changes.
§ Continue to assist Irena with setting up her web site to accommodate review of attachment As.
§ Confirmed content of the PI mailing list with Peter Saulson.
· COST BOOK DATABASE:
Working with Carol and Dwight
From: Ken Mason kmason@ligo.mit.edu
SEI Structure:
ASI has delivered the documentation package to Ed Jasnow and Ed has distributed copies to Dennis, Joe G., Brian L. and myself. Several assembly drawings have not been signed off as released until Scott VandeZyl returns from a trip.
We have instructed ASI not to charge any additional hours to this contract until further notice.
The buy-off meeting scheduled for next week at ASI has been put on hold until we can thoroughly review the contents of the documentation given to us.
Actuators:
I met with the engineers working on the actuators at PSI. We reviewed the status and specifications of the large and small actuators. We also compared the thermal analysis done at PSI to the thermal testing done at Hanford.
PSI will ship one large and one small actuator to Jay Heefner, the remaining actuators will be shipped to MIT on 3/10/2005.
Along with the actuators PSI will send to us:
From: Janeen Romie romie_j@ligo.caltech.edu
Advanced LIGO Suspensions
Norna Robertson visited us for the day yesterday. We were in the lab all day, suspending most of the quad. It was a good exercise in understanding the assembly steps. I believe Norna, Calum and Russell Jones will agree that the exercises were fruitful. We thank Norna for coming down for the day. While she was here, we also discussed topics of discussion for the March 21st SUS breakout meeting of the LSC.
Working on SUS R&D budget.
Working on tablecloth model for fea.
From: Ken mailand kmailand@ligo.caltech.edu
Adv. LIGO
I'm currently learning solidworks, and working on the lower suspension installation arm to move the lower suspension into the BSC chamber.
Also I have finished designing a platform for the modules for the BSC chamber, to fit either the large or small port tube, and to allow positioning possibilities to clear obstructions that may be near the chamber. One assembly is in process at the CIT shop and should be finished next week.
I spoke to Riccardo re. his previous experience with the air bake ovens, for possible configurations and space requirements. This preliminary hardware design showing an oven with a integral wash cleaning platform was sent for quote, the hardware configuration was modified this week. The preliminary cost estimate for this bake oven/cleaning station is ~$45,000 +shipping.
I have requested a ball park baking estimate from NTS based on our visit, not a quote, just an ROM for our budgeting use. The NTS response is $18,750.00 to clean the large parts per set, [one BSC] and $4,870.00 per bake out cycle, times the number of bake outs required.
From: "Mark Barton" mbarton@ligo.caltech.edu
Pretty much all my work this week was dual purpose. I did a simplified
Mathematica quad model similar to the triple of last week. For AdvLIGO I used
it to generate a set of symbolic matrix elements in Matlab format that model
the blades more accurately than the old GEO code. For e2e I used it to generate
some numeric state-space matrices that will be efficient for time-domain
simulation. I also tidied up and posted (<http://www.ligo.caltech.edu/~mbarton/SUSmodels/>)
a lot of the stuff I've been working on recently including v2.0 of the modeling
toolkit, the new simplified triple and quad models and a new manual,
T020205-01.
From: Helena Armandula
<ahelena@ligo.caltech.edu>
Advanced LIGO Coatings
From: Peter King pking@ligo.caltech.edu
AdvLIGO PSL
o So far so good with the high power photodetector exposure test. A little over 2 weeks running at 375 mA without any obvious signs of damage.
o A new photodetector topology is being explored. However a limitation is the amount of photocurrent the design can handle. I have not thought of a way to overcome this as yet.
From: Michael Smith smith@ligo.caltech.edu
STRAY LIGHT CONTROL
o I have completed a preliminary stray light budget for the ADV LIGO IFO. However, I am working with Hiro to verify the proper magnitudes of the scattered light/noise transfer functions for ADV LIGO.
o The size of the MMT3 affects the size of the errant beam baffle, which scatters light into the recycling cavity. However, this has a negligible effect on the scattered light budget for ADV LIGO.
BS SIZE
o
I completed an analysis of the power loss around the
edges of the 45 degree tilted BS and the corresponding elliptical baffles
at the ITMs and the PRM. The beam optimally placed on a 336 mm diameter BS
produces a 100ppm power loss in the recycling cavity; a 411 mm diameter BS
produces a 1ppm power loss.
From:
Riccardo DeSalvo desalvo@ligo.caltech.edu
Erika
Updated simulations with optimized tilt correction using the map of the prototype mex hat mirror. The updated results are in http://www.ligo.caltech.edu/~desalvo/temp/Erika-simulations-update.doc
Marco, Phil and Riccardo
On shift in Hanford
The laboratory has been cleared of all asbestos that needed removal and most of old air conditioning. Now reconstruction is beginning.
Juri
I made further improvements in my simulation program; I tested the routine I built with Mathematica for the automatic length control in order to achieve the resonance condition in the cavity and it worked pretty well: it is very fast and easy to modify. I run a simulation with curvature mismatch and the result was in agreement with the theoretical prediction. In the next days I will focus on the characterization of the input beam in order to improve the coupling with the cavity.
The creep experiment: from the measurements I took this week the system seems to have reached a stable configuration and in the next days we will came back to the temperature of 40 C and then we will move to 200 C for the last run.
For additional information about this report, contact whitcomb_s@ligo.caltech.edu