The LIGO Executive Committee Agenda for Monday August 23, 2004 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items: Contract
options to deal with increased ASI costs
Major improvement in the low frequency noise on H1—see
the Hanford report
First lock of the dual recycled Michelson on the 40 m -- see their report.
no report
STATUS OF LSC MOUs
(Petrac)
(LSC Research Plans through Feb. 2005 and Prog. Reports through Aug.
2004)
ACIGA
Balearic
Carleton
Caltech-CEGG
Florida
GEO
LSU
Northwestern
SLU
Syracuse
Trinity
Columbia / New applicant
Vassar
(LSC Research Plans through Aug. 2004 and Prog. Reports through Feb. 2004)
ACIGA
Florida
LSU
National Astronomical Observatory-China (NAO-C)
Northwestern
Orsay Group (aka Groupe Virgo)
VIRGO
SITE TELECONFERENCE (Lindquist)
There was no site teleconference scheduled for Thursday, August
12, 2004 due to the LSC meeting at Hanford. The list of assigned actions
updated through July 22, 2004 may be found Here.
PROPERTY MANAGEMENT (Chargois)
>From: Ed Chargois <chargois_e@ligo.caltech.edu>
DOCUMENT CONTROL CENTER (Turner, Mak)
>From: Linda Turner - turner@ligo.caltech.edu>
> From: Cleveland Mak <mak_c@ligo.caltech.edu>
WE 08/19/04
|
Packages |
Faxes |
|
In |
22 |
32 |
|
Out |
4 |
16 |
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@ligo.caltech.edu>
Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport.
(For passwords contact Florence)
SUBCONTRACTS MANAGEMENT (Petrac, Jasnow)
>From: irena@ligo.caltech.edu (Irena Petrac)
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
SUPPORT (Baldon, Kammerling, Lloyd)
>Irene Baldon
>Sharon Kammerling
>Dorothy Lloyd
ADVANCED LIGO (Cost Schedule Control
Systems) T. Frey
>From: Thomas Frey <tfrey@ligo.caltech.edu>
See Advanced R&D Section.
PROPOSAL and REPORTS (Lindquist)
Schedule of proposals and reports planned for the remainder of the calendar
year.
We have essentially completed the Annual Report with the exception of a few
missing pieces. Overall there is a lot of good stuff reported. Most
of the FastLane entries have been entered. I think that it is basically
ready to go except for resolution of the few missing pieces and scrubbing the
publications list.
We have prepared a Final Report for the old LIGO Visitors grant and .pdf copies
have been distributed for review. Publications need scrubbing here also.
I am moving on to other issues like setting up budgets for FY 2007 - 2011.
CHANGE CONTROL/CONTINGENCY MANAGEMENT
(Lindquist)
There are no open change requests currently in the system.
[from Larry Jones] The Advanced LIGO SEI group plans to propose to the LIGO
Excomm on 23 Aug that the budget be increased for the ASI contract, adding
$445K in funds in anticipation of a total contract cost of $2423K [Larry's
Numbers]. This is to cover a growth in expected expenses with a slight decrease
in contract scope.
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 (Landry)
LHO hosted the August LSC meeting this week. The event was highly
successful thanks to the efforts of Terry Gunter, Daniell Yager, Linda Turner,
Terry Santini & Co., Richard McCarthy, Christine Barker, Larry Wallace,
John Worden and Mike Pedraza.
4K IFO
ASPDs, particularly AS1 and AS4, had previously been shown to have more 49MHz signal
than desirable. The 2-omega traps were suspected and thus received retuning.
An additional notch was added in the respective feedback paths and then the
ASPDs were returned
to the table. ASPD transfer
functions were later obtained with an AM laser.
High
bandwidth MICH and PRC loops were then restored to the IFO. Previous attempts
had this had not resulted in expected gains, owing to additional noise sources in
the spectrum. This time, concurrent optimization
and optical
lever filter fixes yielded the best ever 4k spectrum with a binary inspiral
range of ~7.4Mpc. A noise budget
for this spectrum was worked out. Thermal noise has yet to be added, but
right now the limiting sources are thought to be optical lever damping at low
frequencies, actuation electronics and MICH control at intermediate ones, and
shot noise at high frequencies.
Next, a list
of 4k problems will be tackled. Efforts are sometimes hampered by short lock
durations.
Ideally, typical evening running would be stable enough to make GRB watches
(post-commissioning, in the early morning hours).
Dick G and the SURF Machine: a 12MHz RF
photodiode was added to the REFL port, intended to observe an error signal
formed from RFAM sidebands at 37MHz beating against the PRM 24.5MHz resonant
sidebands. A second (of four) SURF experiment employs fibre-transported
PSL light beat against POY.
2K IFO
The MC REFL light level is unexpectedly different,
post-vent.
Another REFL periscope installed,
tapping off a pair of REFL diagnostic beams for later use.
The 2k has posted decent
ranges, one .9Mpc and the other 1.6Mpc. We have to reproduce and
investigate the latter measurement however, some skepticism is in order.
Outreach (Dale Ingram)
Draft summaries of four recent LHO outreach activities are now viewable:
Corey Gray's summer science camp presentation (http://www.ligo-wa.caltech.edu/~dingram/coreygray_0804.pdf)
(See Corey's own report at http://www.ligo-wa.caltech.edu/~cgray/SKC_summer_camp_04.html)
WSU T&L 571 for teachers @ LHO (http://www.ligo-wa.caltech.edu/~dingram/571_newsletter0804.pdf)
LHO and TCAC Perseid Meteor Shower viewing (http://www.ligo-wa.caltech.edu/~dingram/perseids_081104.pdf)
Greg Baker (Geneva High School) & Steve Penn collaboration (http://www.ligo-wa.caltech.edu/~dingram/baker_penn_0804.pdf)
A big thank-you to Peter Saulson for giving an excellent Public Lecture on gravitational
waves in Richland on 8/18/04.
Many were at the LSC meeting this week, where our thumbs-up HEPI report from
last week was answered by spectacular H1 sensitivity progress (check it out!),
a huge improvement in GEO noise, and a first lock on the 40m dual recycled
michelson, not to mention excellent S2 and S2/S3 analysis results. Not a bad
week for GW experiments all round!
Back at the ranch, the big push is on the EMC retrofit in the corner station.
As of Thursday Rusyl reports that all the power supplies are moved as well as
all the VME crates and boards and nearly all the analog electronics (all of
SUS, ASC and most of PEM and LSC). HEPI is back up and enough of the
fibers are in to start waking up the VME processors. We ran short on some
50-pin cables, some Ethernet wires were forgotten, some fibers came up too
short, and one of the balanced-power units was undersized, but by and large the
project is close to the (optimistic) baseline schedule. We currently expect to
be able to wake up suspensions and damp optics Monday and start functional
checkout of major systems the following week. The eerie quiet now found in the
LVEA is said to be unnerving.
HEPI and IFO engineering (Abbott)
---------------------------------------------------------------------
1. Began moving HAM4 to align the chamber with the desired optical
alignment obtained using HEPI as an alignment tool. The process is a bit
slow right now as Gary is sick and I really need his eyes and hands to do the
job well. We are planning on relieving the clearances on all the horizontal
actuators on HAM4 while we are doing the re-alignment.
2. Working with Oddvar on HEPI documentation. We are incorporating
flow charts right now that show how the microprocessor code functions for the
various iterations of the pump servo code.
3. Helping Rusyl on the RFI retrofit task by doing various odds and ends
as he needs them. Mainly small stuff like ordering cables and testing
cables.
4. Completed an analysis with Joe Hanson on the HEPI actuators removed
from service due to hydraulic offsets unrelated to the control valve. There
are no indications of any parasitic leak path internal to the actuators in
question. The pin valves that form a large part of our suspicion base
have been exhaustively checked and seem to seal very well. They will hold
air pressure for hours when differentially pressurized using shop air.
Conclusion is that we can't find any difference between the actuators we
removed and other members of the herd of spares. They all seem fine.
Safety & security (Riesen)
---------------------------------------------------------------------
Found no new safety concerns on weekly site tour.
Scheduled PM on Tenet sweeper and scrubber completed
The repair on the LVEA crane is scheduled for tomorrow (Fri. 8-20-04)
Replaced all 6 LVEA drain covers with 1 perforated plates. Safety
concerns rectified
Livingston Facilities (Sibley)
---------------------------------------------------------------------
The broken fan actuator in the south end has been disassembled and the broken parts
have been ordered. The technician from Howden Buffalo (old Joy Fan) will be
here tomorrow (fri) to teach us and our HVAC contractor, Star Services, how to
adjust the fan pitch control. New bearings are being cleaned for installation.
If all goes well we should be back on line tomorrow.
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.
* Working with Solsoft to try and get a demo license for their enterprise
version of the firewall software. This has some excellent reporting and
auditing features that would be useful here (and at other locations). We may be
able to work a deal with them so that we get it at a much reduced rate or free
if we do a writeup on the software. I will of course have to clear this
through everyone before I agree to it. I will send out an email to
everyone explaining the situation and the desire for the upgrade.
* Revisiting the computer installation in the auditorium. I had purchased
a computer a whle back to handle the multimedia needs of the auditorium. I am
planning on installing it in the auditorium in the next few days. This
should help things out greatly in there for the next conference.
* Typical round of software installation/support issues, mainly for a new employee.
* Investigating the possible usefulness of a piece of software for netork monitoring
here. in particular tools like flowscan...
http://www.caida.org/tools/utilities/flowscan/index.xml
Data analysis (Yakushin)
---------------------------------------------------------------------
LDAS admin:
Getting more and more users for Condor@LLO. Especially from people attending
the bootcamp.
Data analysis:
Made a presentation at LSC about waveburst version 5 performance on S2 MDC
frames, LIGO-G040389-00-Z.
see also the CDS weekly meeting minutes in the commissioning archives:
no report
no report
PeterKing
Dave Grimmett fixed up the 35.5 MHz RF photodetector.
The OPA547F power op-amp, photodiode and 74CH04 were replaced. As a
result the magnitude response is markedly better. Since my only
pre-modecleaner is on loan at Stanford, I hope to re-cycle another one together
later this week.
I'm having a few teething problems with my new high voltage
amplifier circuit to do with finding a suitable high voltage trimmer capacitor.
Along with trying to cram all the components in a small Pomona box.
Mike Smith
I have propagated Gaussian beams through a model of the
4-mirror OMC, and am still trying to analyze the amount of astigmatism present
in the design. There appears to be a lot of astigmatism in the round-trip pass
through the cavity, but I don't have any quantitative results yet. I have also
modeled the cavity analytically, and I obtain the same x and y beam waists that
K. Kawabe calculated with the 76.3 and 101.7 mm radius mirrors. However, I
believe that a stable cavity solution also exists using a 152.6 mm radius
mirror (instead of the 101.7 radius), which gives a 96% match of the x and y
beam waists; the 101.7mm radius mirror only gives an 80% beam waist match. I
believe that the original layout, in which the beam enters the Ry mirror with
the curvature of the mirror out of the plane of incidence is preferred, because
it will result in much less distortion of the input beam than if the curvature
of the mirror is in the plane of incidence.
Ken Mailand
The main cavity spacer and the PZT holder bracket drawing
are at the CES shop, along with the 'invar 36' material, to make it.
Lee Cardenas, Liyuan Zhang
OTF Lab. (W. Bridge)
The chamber has two samples, white Ceramabond, and disks of
TRA-BOND #2254
color light brown epoxy. Cavity is locked.
We continue taking measurements everyday.
Absorption Test Measurement prototype in standby!
The two sapphire pieces already tested are sent back to
Stanford.
Scatterometer system
in standby!
The Quantronix 60 watt laser
The running of the cooling system on the laser is done
periodically.
OTF Lab at Lauritsen ROOM 38 NO CHANGE!
Cavity #3
Chamber is pumping with (6) disks of TRA-BOND #2151 color
blue epoxy and
(4) disks of
TRA-BOND #2902 color silver epoxy.
The cavity is locked.
We continue taking daily measurements.
Cavity #2
This chamber has been completely stripped and is ready to be baked.
New baked chamber is in its way!
PSL Laser lab
Laser in standby
no report
no report
Simulation and Modeling
(Bhawal)
Lock loss study using SimLIGO
------------------------------
(Virginio)
- Tested new BSC TF in SimLIGO (see informal report for description on
http://www.ligo.caltech.edu/~vsanni/e2e/SeismicNoise/BSCStackTF
- Injection using PEPI channels and seismometer in SimLIGO with new TF
still drops the IFO out of lock. Injecting just displacement noise and removing
disp to angle coupling does not change the result.
- New set of matlab scripts to quickly analyze SimLIGO output available at
http://www.ligo.caltech.edu/~vsanni/e2e/e2eSL2matlab/index.html
Alfi
---------
(Bruce)
- Design and implementation of
ParameterLink objects for use in opaque boxes, as well as graphical
elements to be used to create and edit them.
(Melody)
Modifying the ALFI bookkeeping objects to allow displaying the FUNC_X
data variables in a friendlier user interface. The dialog will show the
member variables in the table just as any parameter setting variables (instead
of having to look for them in the C++ code).
Investigated a NullPointerException Virginio encountered while running the
latest version of ALFI. It turned out that the JGo being distributed was
an older version.
Assisted Virginio with some problems he was having with alfi and the vector
primitives.
Investigated a NullPointerException when exiting alfi which was started from
the e2e webpage. Found a work around and wrote a PR describing the
scenario.
Data Analysis Activities (Lazzarini)
Shawhan:
* Performed checks of coincidence tests, efficiency calculation, and background
estimation for the S2 binary neutron star inspiral search. Wrote a completely
independent software implementation to do these checks. Found a very
minor bug in the way coincident events are used in the efficiency
calculation. Verified that the time-shift background estimation methods
was correct in the original implementation. Still have to check the total
observation time and the overall normalization of the background estimate.
* Organized and attended a two-day face-to-face meeting of the Burst Analysis
Group.
* Attended the LSC Meeting
Yakushin:
Data analysis:
Made a presentation at LSC about waveburst version 5 performance on S2 MDC
frames, LIGO-G040389-00-Z.
LIGO Data Analysis System
Software Systems (Blackburn)
Weekly system and integrtion tests identified a bug in the diskCacheAPI this
weekend. This API coredumped during the dcmangle test which is used to
demonstrate the ability to handle changing mount points for locating frame
files. It is thought that this is a thread issue that has been in the code for
quite sometime, but is rarely exercised. The weekly system tests also include a
new test to validate support for the new complex data channels that have been
produced. Other than the issue with the diskCacheAPI, no other issues were idenitified.
The dcmangle script was repeated several times to try and exercise the bug that
caused the core dump this weekend. This was unsuccessful (typical of thread
issues). In an effort to fix the bug, a careful code review of the API has
begun, taking advantage of the lessons learned when a similar issue was
encountered in the frameAPI last year.
Work continued on the port of LDAS software to the Solaris compiler. Solaris
provides its own version of STLport for that compiler since the open source
version doesn't compile on Solaris and the fixes are held only at Sun.
Unfortunately, the Solaris provided STLport has a bug in its fstream class
which has lead us to the geodesic of customizing our own fstream class as a
substitute.
We are currently running long term tests on LDAS-Test to identify possible
memory leaks. We will also attempt to isolate new memory leaks using the
utility "valgrind" prior to the LDAS release in a couple of weeks.
The controlMonitorAPI now has the ability to monitor the usage of the beowulf
cluster on a per user or per dso basis. This will allow ranking the top users
and search codes on the beowulf cluster under LDAS.
The missing documentation for the compression libraries, bzip2 and zlib have
been added to our how to build LDAS website.
Work continued on restructuring the underlying diskCacheAPI code used to
maintain and search through time intervals.
The new sngl_burst_table changes were tested on a tandem LDAS system this week.
These tests identified issues with the design proposed by the Burst Group. The
co-chairs of the Burst Group were provided feedback as a result of the testing
issues and further changes to the table design were made that cleaned up the
problem.
Closed out PR 2658 - ldas generated email now have a common informative
message.
Closed out PR 2151 - mpiAPI needs faster clean up based on a sudo method.
Closed out PR 2663 - a defined set of users may now create new subdirectories
under LDAS for RDS creation as part of the user command.
Hardware Systems (Anderson)
LLO
Igor
Getting more and more users for Condor@LLO. Especially from people attending
the boot camp.
LHO
Ben
1) Preparing ldas-pcdev1 and ldas-grid for Summer Camp this weekend. Installed
the latest RH9 glibc on ldas-pcdev1 to prevent unclean "matlab
-nodisplay" exit.
2) Added several users to cluster accounts.
3) Replaced u1f7@t3-13.
4) Upgraded firmware on 3510-10@CIT, in preparation for more "check
parity" testing.
5) Assisting Dave Barker get the new SF440 framebuilder up to the necessary
QFS/SAN/MU setup.
MIT
Keith
1) upgraded rls server for LDR
2)added MIT specifics toUWM webpage (via cvs) turned off daily updatedb
(slocate) cron jobs on cluster which caused skewed runqueue average stats
shown on ganglia page
3) ran ram burntest on new pcraid#7 (passed) running nfs/network benchmarks on
pcraid#7
CIT
Al
1) Setup node8 in the test system for burn testing.
2) got the replacement MB for pcdev1. Will install and test ASAP
3) 215 sync had its annual fire check out.....passed.
Dan
1) Continued the transfer of non-run second trends for both LHO and LLO (about
1,000,000 files total) from HPSS to SAM-QFS (and their subsequent deletion from
HPSS).
2)I started with LLO: of the 458620 LLO files, we've transferred 384265 as of
this writing (84%).
3) I've also LHO second trends transferring--we've transferred 211209 of 526258
files as of this writing (40%).
4) HPSS has been running much better, but we have one directory (L-T-702) that
is stuck (can't transfer anything else out of it). It may be just one
file that's the problem, but it will have to wait until other activity is done.
5) Got QFS license for new LHO framebuilder.
6) Ordered replacement 3510 disk for 3510-10 (the test unit at CIT).
7) Have been working on getting a quote from STK for silo maintenance.
8) Am currently trying to fix problem with /archive on ldas-cit (seems to be a
SAM-QFS bug relating to UIDs, but I'm not sure yet).
Hari
1) Working on transferring C01_LX data from UWM.
2) Publishing and unpublishing C01_LX data.
3) update rls servers on ldas-cit and ldas-gridmon
4) Updated the lsc web pages to describe the CIT grid better
5) Working on keeping the 1% data flowing from the sites
6) Created 4 new user accounts.
General Computing (Wallace)
MIT:
(Keith)
-Upgraded 5 gc Ultra 10's to Solaris 9 w/ patches etc
-Troubleshot matlab R14 install on desktop pc
-Installed spy detection software (from Caltech) on several pc's.
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.
* Working with Solsoftto try and get a demo license for their enterprise
version of the firewall software. This has some excellent reporting and
auditing features that would be useful here (and at other locations). We may be
able to work a deal with them so that we get it at a much reduced rate or free
if we do a write-up on the software. I will of course have to clear this
through everyone before I agree to it. I will send out an e-mail to
everyone explaining the situation and the desire for the upgrade.
* Revisiting the computer installation in the auditorium. I had purchased
a computer a while back to handle the multimedia needs of the auditorium.
I am planning on installing it in the auditorium in the next few days.
This should help things out greatly in there for the next conference.
* Typical round of software installation/support issues, mainly for a new
employee.
* Investigating the possible usefulness of a piece of software for network monitoring
here. In particular tools like flowscan...
http://www.caida.org/tools/utilities/flowscan/index.xml
Hanford:
(Christine)
- Lots of meeting support. Thanks to Larry for the pre-empting setup help
and to Mike P. for his great help during the meetings.
- Helped SURF students with Malta license problems and e-mail problems..
- Helped an at home staff member get her work e-mail at home.
- Misc. other user support.
CIT:
(Mike)
-Reloaded OS and GC software on 2 loaner laptops that came back from travel. I
put these laptops back into the loaner pool.
-I finished up loading 3 visitor workstations with General Computing/Engineering
software.
-I setup 2 more visitor workstations up on the 2nd floor of W/B. I now have PC's
setup in all visitor cubicles on the 2nd floor.
-Helped out in Hanford, for the LSC conference.
-Other misc. onsite/phone support.
(Veronica)
- LSC website: Most time was spent on the web support of the August meeting.
Posted last-minute website updates before the meeting, and as it progressed,
posted the presentations as soon as they arrived. Linda reports positive
comments about the talks appearing on the web quickly. Assisted the DCC in
tracking down files as needed. Posted updates to other webpages of the LSC
site.
- LIGO website: Worked with Sharon on helping her with updates to Barry's and
her webpages. Posted updates to the seminars webpage. Did a massive update of
the roster database and the html frontend. An author list scripting project
pending.
(Lisa)
- I've been holding down the fort this week while Mike and Larry were on
travel.
- Did some performance tuning on the mailserver. We had been running out
of mimedefang slaves and having to temp fail mail. Also, I started trying
to determine where our queuing load average should be set.
- Build a blade 1500 for the 40m martian network.
- Made changes to the hosts.allow on alterf. There are some questions
about the configuration of this box now that it is replacing saiph. I expect
that it will continue to get changes for the next couple of weeks.
- A number of people have been commenting that more spam is getting through
recently. I spent a few hours tweaking the spam filters to try and block
more of this.
- Began writing a system to track mac addresses for all machines, ligo,
personal and visitor.
ail Stats 08/12 - 08/18/04
Messages Accepted:
Spam Rejected:
Viruses Rejected:
False Positives:
Total Mail Thru:
% spam blocked:
activity)
(Larry)
-Assisted Christine in support of the LSC. Fortunately, the setup went well and
only had a few minor issues on that. Assisted a few of the attendees with
problems on their computers, all of the issues were resolved.
We've learned a fewnew lessons from this conference and confirmed past lessons
learned. We definitely need to have someone from CIT at the meetings to assist.
The work load takes its toll on the group hosting the conference. A day or two
before the conference to a day after should be planned. Trying to do any other
major projects other than support should not be considered.
The NAT routing system is the only way to handle the large number of attendees.
Using the system Shannon setup at Livingston for the last conference held there
also worked well for the mtg. at Hanford.
One issue we are still trying to get a handle on is getting the attendees to
provide their MAC address. We have a few ideas we are working on.
-Worked a number of procurement issues. Things are not looking good for the
400GB drives, it is possible that order will be canceled.
-The computer room is still being worked on. It should be wrapped up soon. We
did lose a lot of space with the fire suppression system being installed but we
will work around it.
-Worked out a couple of E2E issues. Nothing major just resetting of the NIS+
files.
-Went over some of the logistics for the new GigE installation with Dave
Barker. Still a number of items and schedules to be worked out.
-Regular user assistance.
Progress Period from 08.13 to
08.19
·
·
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
§
§
Prepared an "AdL Project Management Information System" document
as requested by Carol on 8/13, for a meeting on 8/16.
§
§
http://www.ligo.caltech.edu/~tfrey/AdL_PMIS.htm
§
§
Scheduled WebEx session as requested by Carol. (Ultimately placed
on stand by)
§
§
Executed meeting with Carol, Dennis, David S, and Stan on Monday the
16th.
§
§
Continued work on preparing web space for posting Adv. LIGO reports.
("The Whole Enchilada")
§
§
Continued the input of changes / preparing RFIs / responding to RFIs, as
a result of the meetings with Carol and the Subsystem Teams.
§
§
Completed input of progress data, for progress through
§
§
Posted updated schedule reports / milestone tables to web space.
§
§
Compiled and sent out progress data requests for the period ending
·
·
ROSTER DATABASE:
§
§
Continued to work with Irena to provide Barry with information regarding
FTEs and Institutions.
·
·
COST BOOK DATABASE:
§
§
Update / Posted list / statistics of accounts and activities as requested
by Carol, for
§
§
http://www.ligo.caltech.edu/~tfrey/rd2005/Acct_Stats.htm
From: Larry Jones <ljones@ligo.caltech.edu>
Advanced LIGO Seismic Structure
SEI Structure:
Work continues in investigating options for descoping to contain costs on
the ASI contract. ASI has updated and clarified the BSC unit fabrication costs
and provided anticipated costs for pod creaking redesign, thermal straps, and
other issues which had not been included in previous estimates.
Delivery at LASTI of the BSC structure prototype is now scheduled for
Actuators:
Kyle Ryan is proceeding with preparations for conducting a Thermal Vacuum test
of the large actuator at LHO.
PSI is proceeding with fabricating the 6 large and 6 small actuators for the
BSC prototype structure.
We've decided to not preclean the magnet wire for the actuators (at least for
the LASTI prototype SEI BSC unit), due to the successful outgassing data from
the large actuator prototype (which had wire that had not been precleaned), and
the high risk involved with existing precleaning methods.
Displacement Sensors:
Nothing new
Seismometers:
Nothing new
Galling/Dusting Test:
Nothing new.
Other:
Nothing new.
From: Janeen Romie <romie_j@ligo.caltech.edu>
AdLIGO Suspension
We made the decision to award the
Calum and I are coordinating visits from various
Calum and I will visit Stanford in the coming month to discuss possible testing
of the mode cleaner triple suspension on the ETF Tech Demo.
Working with Dave Hoyland from the
Hosted and participated in two sapphire clocking meetings with various
suspension team members and Gari Billingsley. Gari brought up the issue of the
need to orient the sapphire optics to the laser beam in rotation. The meetings
provided the information that Gari needed for the sapphire downselect. If
sapphire is chosen, this topic will be discussed in more depth. Mike P-L is
currently working on a mechanical rotational alignment technique that may be
used on the quad.
On Friday, Thomas, Caroline, Helena and I will meet to discuss the schedule for
the ribbon and ear work.
I have reviewed Larry's oven drawing for the quad structures. Calum and I will
meet with Larry tomorrow to go over the details.
Gin Gin
CES will fabricate 12 clamp sets to go with the 12 lower MC blades
being sent to Gin Gin next month. I am coordinating with Conor Mow-Lowry on
this. He should get the parts near the end of September.
From: Michael Smith <smith@ligo.caltech.edu>
ADV LIGO
OUTPUT MODE CLEANER
I have propagated Gaussian beams through a model of the 4-mirror OMC, and am
still trying to analyze the amount of astigmatism present in the design. There
appears to be a lot of astigmatism in the round-trip pass through the cavity,
but I don't have any quantitative results yet. I have also modeled the cavity
analytically, and I obtain the same x and y beam waists that K. Kawabe
calculated with the 76.3 and 101.7 mm radius mirrors. However, I believe that a
stable cavity solution also exists using a 152.6 mm radius mirror (instead of
the 101.7 radius), which gives a 96% match of the x and y beam waists; the
101.7mm radius mirror only gives an 80% beam waist match. I believe that the
original layout, in which the beam enters the Ry mirror with the curvature of
the mirror out of the plane of incidence is preferred, because it will result
in much less distortion of the input beam than if the curvature of the mirror is
in the plane of incidence.
For additional information about this report, contact whitcomb_s@ligo.caltech.edu