There will be no LIGO Executive Committee meeting scheduled
Monday, June 20, 2005. We will resume as
usual on Monday June 27th.
No report.
>From: Ed Chargois <chargois_e@ligo.caltech.edu>
>From: Linda Turner - turner@ligo.caltech.edu>
>From: Cleveland Mak <mak_c@ligo.caltech.edu>
>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>
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
>Irene Baldon
>Julie Hiroto
>Dorothy Lloyd
LIGO must submit an Annual Report for Operations by August 1, 2005 and this annual report must be accompanied by a request for a two year extension (FY 2007 and FY 2008) as well as a justification for why Caltech/MIT should be continued in the role of management of LIGO. We are beginning to get some contributions.
We met to review status and define a future course of action. We have an action to look at the demo pages of another system, LibertyNet, to determine whether or not they are worth a serious look. We are beginning the process of comparing the attributes of various document management systems against our requirements list and my attempt to set up an additional discourse with the vendors for a selected few.
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
>From: Bill Tyler tyler@ligo.caltech.edu
From: Brian O'Reilly
Tropical storm Arlene and nearby logging have interfered with IFO operation
for the past few days. We are back in low noise mode after last weeks PSL work,
but at a lower power than previously.
Many of the reports include items from last week. Due to network problems at
LLO they did not make it into last weeks report. The current status is that we
should not have any more protracted outages, but the root problem remains to be
fixed (see
Most of our remaining SURF students arrived this week and are getting dug in
on their projects.
This week we welcomed Lisa Bogue is the latest
addition to the LLO staff. Lisa is our new CDS SysAdmin.
The storm and unusually high seismic activity from earthquakes and nearby
logging lead to low interferometer commissioning duty cycle this week.
Nevertheless the interferometer low noise operation was recovered with 3.5 W
into the Mode Cleaner, and the work is in progress to increase the power into
the interferometer to the maximum available level of 8 W.
The noise coupling from the input beam jitter and the laser frequency were
measured. It was found that these
sources do not limit us at the current sensitivity. The frequency noise is a
factor of three below the noise floor in amplitude and the beam jitter is two
to three orders of magnitude off.
The Mode Cleaner length was measured relative to the main sideband
modulation frequency and it was found that the Mode Cleaner is about 300
microns longer than it was during the S4. Changing the MC length back to the S4
value using HEPI HAM2 position offset did not change the noise spectrum. This
indicated that the oscillator phase noise is small enough so that the change in
coupling did not affect the ifo
noise at the current sensitivity level.
The fiber connection between LLO and LSU has been having issues for
approximately two weeks. Before then, we
would see occasional errors on the receive side of the LLO router. LSU was not seeing any problems, therefore it
had to be on our receive side of the fiber.
The errors would increment at a rate of around 2-6 per day. There were occasional outages less than one
hour (usually around 5-10 minutes) and then the circuit would recover. On May 30th, the circuit went down and stayed
down much of the day. Bell South was
notified and they started working the problem, but the circuit came back before
they could diagnose any real problems.
The following Monday, June 6th, the circuit again went down for much of
the day. Both outages followed strong
rain in
Setting up six PCs in the outreach area for John Thacker.
Working on rounding up a Linux workstation for a student arriving Monday. Unfortunately I may have to purchase one in
town since we are out of spare workstations.
Working on a summary of security issues for Albert for the
yearly report.
Working on documentation of the LAN topology. I will have to work with LHO in the next
couple of months to try and get
Working with Solsoft on pricing
on a software upgrade. I need to look
at the budget and determine if this is possible.
Discovered a problem in our LAN/WAN configuration due to the
Almost all of this week (and weekend) has been spent working on the
Set up a student PC running Fedora Core 3.
Core 4 would not install - might have been my CD image.
Rearranging the computer lab. Installed a UPS for my
testing servers. Had to move a lot of items around in the lab to accommodate the
rack, etc. Ordered
a PC for a student since we are basically out of spare machines.
Working on setting up the router for remote IDS when I can
squeeze in time.
Installed tcpdump, etc. on it.
Looked into an issue where it seemed the interfaces on the router were
coming up at the wrong speeds. It
appeared that they were coming up at 100 mbit, but
they were in actuality coming up at 1000 mbit. I do think that the Cu interfaces are coming
up at the wrong speed though. The Syskonnect cards are fine though.
Since last week weeklies did not make it in time due to the network outage
at LLO, this weeklies include both.
1) The
redundant controller in 3510 failed and was replaced. However, there seems to
be a mismatch in the firmware versions. The firmware on the secondary
controller needs to be upgraded during the next downtime (according to the
documentation, upgrading firmware might cause a few minute interruption in the
work of 3510).
2) The
batteries in all T3s were replaced.
3) Right
before I left for the LSC meeting, Condor started behaving strangely: it would
allow to run jobs only on about 28 nodes although
nothing seemed to be wrong with the other nodes. Restarting Condor fixed the
problem. Yesterday, I had this problem again. Again restarting Condor (couple
times) fixed the problem. It is probably connected to the new configuration
files rsynced from CIT or the new version of Condor
since I never had such a problem before. I also had to define LIGO_PREEMPT in
/usr1/condor/condor_config which was not defined in the new configuration
files, as discovered by Ben, and resulted in Condor not running on the nodes.
4) Cleaned
drive 03 in the tape robot that displayed "Need cleaning" message.
5) The
failed drive in the spare T3-13 was replaced however failed to work. It turned
out that three more drives had to be replaced although fru
stat or fru list did not show any problem with them.
Now all the disks in T3-13 seem to be working fine.
6) Found
some strange problem with Condor@LHO: the jobs in the
dag that could grab CPUs at the beginning ran
successfully but the rest of the jobs were reported as finished though they
were never tried. Again, it most likely has something to do with the new
configuration files rsynced from CIT.
1) Attended
LSC meeting and burst face to face meeting in
2) Made
a presentation on the status of the S4 untriggered
burst search at the LSC plenary session. This presentation is a rehearsal of
the one I shall make at Amaldi.
3) Worked
with Michele to process LIGO-VIRGO simulated data with waveburst.
Michele presented the preliminary results in face to face meeting in
4) Compared
waveburst triggers on h(t) and AS_Q and reported the
results on this week burst telecon: http://www.ligo-la.caltech.edu/~igor/S4/HT_vs_AS_Q
5) Working
on finalizing Amaldi6 presentation which now turned into a poster since the
burst group got only one talk out of four that were originally submitted.
6) Discovered
a problem with V2 calibration used in SG16_S4 MDC: the injection into H2 were
twice stronger than they should be (in AS_Q only, DARM_ERR channels most like
were not affected, h(t) were not affected).
7) Ran
waveburst on DARM_ERR, V3 calibration, both
production and SG16_S4 simulations. Processing the triggers.
8) Working
on processing more simulated Virgo data with waveburst
so that the results can be presented at Amaldi6.
9) Published
waveburst S4 production and simulation triggers on
h(t) and AS_Q: http://www.ligo-la.caltech.edu/~igor/S4/TRIGGERS
1) HPLF
news: The laser has continued to work without problems. Rupal
Amin and I have been testing CVI high power thin film
plate polarizers at 100 W. So far the data indicates
that the degree of polarization is lower than specified. We have also observed
stronger thermal lensing than expected, probably
originating in some of the Thorlabs 2 inch lenses
being used. We are now looking for some better high power optics to test.
2) The
PZT tip/tilt platform systems to be used in the REFL port beam stabilization
system was ordered (by Rich Abbott). Unfortunately, a mistake was found in the
original quote which needed to be corrected. Have been explanining
the requirments of the mirror holder to Luke Williams
at the
Ashfaq Khan
1) Working
on a CDS Diagnostics system that includes mapping of the CDS signals and the
Path into the IFO. It also has a detailed PSL layout that shows placements of
different objects on the PSL table.
2) Helped
Doug in wiring the Photon Calibration and Mic
Signals.
Sanichiro Yoshida
The local damping mechanism has been added to a 3D suspension e2e box which
takes into account the suspension wiresÂf
violin-mode motions (3DsusViolin.box). To model the violin mode, the 3DsusViolin
box uses a state-space representation (ABCD matrix) computed by a Maple program
developed by Virginio Sannibale.
This state-space representation is based on a violin mode model also developed
by Virginio. This model describes the violin motion
by dividing the wires into several segments; each simulates the dynamics by a
pair of massless string and bob. The current version
of 3DsusViolin.box uses five segments to describe the wiresÂf
dynamics (i.e., up to the fifth order of the violin mode) and an additional bob
to describe the suspended optic for the pendular,
pitch and yaw degrees of freedom. With a white noise input to the suspension
point and without local damping actuation forces, this box has demonstrated two
violin-mode peaks at 290 Hz and 430 Hz, each is split into two fine structures
due to the length difference between the two wires.
The box file with the local damping mechanism (LOS_violin.box) consists of the same lower level boxes as the LOS.box used in the current SimLIGO, except for the 3Dsus primitive has been replaced by the 3DsusViolin.box. The LOS_violin.box has been tested with a realistic suspension point input and various OSEM gain settings. The resultant power spectrum for each degree of freedom (pendular, pitch and yaw) seems to be reasonable, showing that as the OSEM damping gain is increased the peak at the corresponding natural frequency decreases and instead the peak at the table stack resonance increases. The violin mode peak at 290 Hz is barely seen in the yaw and pitch spectra when the local damping is turned on, whereas none of the violin peaks is visible when the optic is freely hanging. More detailed investigation on the violin peaks is under way.
from Dennis Coyne
see also the CDS weekly meeting minutes in the commissioning archives
no report
Rich Abbott
1) Finished the LSC frequency distribution panel and shipped it to Peter Fritschel at LHO.
2) Changed the frequency distribution system block diagram to reflect some recent changes. A sampling splitter was added to the ASC path, and a request was received to add a jumper path for the RF signal to be available on the front panel of the box. This jumper path is intended to allow simple switchover to an external frequency source for testing.
3) Pushed through the purchasing order for the Piezosystem Jena Refl beam steering servo. Also put in a change request for a noted change.
4) Working with Dave Grimmett to get the ISS boards tested and shipped to LLO. Possible that the first system will ship 17 June 2005 to LLO.
5) Gathered changes together to write a DCN on the LSC whitening filter. Still more work here before I am confident that I know what all the changes are.
Ben Abbott
LSC RFPD: The long-lead capacitors have arrived today, which means that a total of 8 RFPDs will be ready for test by the end of this week. Three of these will be 29.5MHz, and 5 will be 24.5MHz.
no report
PeterKing
The beam propagation of an NPRO laser was measured a number of times. Whilst the beam profile had a nice gaussian profile and the propagation fitted nicely, there was a large discrepancy between the measured spot sizes and locations with the calculated values. That made mode matching a trifle tedious. At present most of the ellipticity in the beam has been removed by 3 cylindrical lenses. Work will now continue with the rest of the optical train..
SURF students Marcus Ng and Ryan Kinney have arrived. Marcus will work with Rob and Mike Smith on the design and construction of the output mode cleaner for the DC detection experiment; he's busy reading Siegman. Ryan will work with Rana and everyone on measuring noise spectra and the noise budget, in various IFO configurations; he's busy reading Rana's thesis.
Since our last report, we have locked the
bond-noise shadow sensor under vacuum and done a preliminary noise breakdown.
We are now working on reducing the noise and calibrating the instrument.
Jay has framebuilder
boxes up and running with a signal generator serving as the clock. This is not
an ideal situation, since the signal generator and the cpu clock will get out of phase after a few days of
operation, but it is adequate to take preliminary data.
SURF students Chinyere
Nwabugwu, Royal Reinecke,
Richard Kirian, and Kate Dooley have arrived and have
started on their projects.
Congratulations go out to former TNI group
member Michael Zhang, a Caltech undergraduate who worked with us during the
summer of 2003.
Michael was recently awarded Caltech's
upper-class merit award, a prestigious, merit-based scholarship awarded to
Caltech's most academically-talented students. Michael made invaluable
contributions to the TNI during his time with us, and he shared authorship on
one of our published papers. We congratulate Michael on his merit award, and we
wish him the best in all his future endeavors.
From: Richard Mittleman
Laurent reports:
I have designed the modal control + estimator loop for the 6 dofs for the MC suspension. The results in damping and
noise transmission are very good and I manage to have a lot less sensor noise
transmission than a classic feedback method.
I have tested the loop on the triple pendulum in LASTI
I have tested the damping to an impulse response and checked the 10s
settling time and it works perfectly
I have tested the noise transmission by injecting a very large amount of
artificial noise in the sensors and measured the amplitude of the top mass
motion...This is not a perfect test since I don't have inertial sensors and
after 10 Hz I am mostly measuring frame's motion, also I don't have enough
sensor on mass3 to check the bottom mass. But the results on what I have match
the simulation perfectly, which is a good sign.
I am writing a 4th document about his, hopefully I will be able to merge the
4 documents into one after that.
Had a visit from clean room systems representative will quote us the class
100 clean room that the suspension and seismic isolation system will assembled
under.
We have received the parts for the solid space that will fit between the HEPI and the Quad controls prototype. We will have this cleaned and air baked soon for preparation and installation into LASTI for a fit check in August.
Matt Evans talked about the lock acquisition of advanced LIGO and 40m. Viewgraphs available at http://www.ligo.caltech.edu/~e2e/ME2ET/Minutes05/050616/
(Biplab) Collected all parameters for optical paths
for all Wave Front Sensors (WFS) of
(i) Gouy phase for WFS1
path is as bad as it was (=187deg) in both 4Km interferometers. This needs to
be corrected to 90 deg.(elog
June9)
(ii) WFS 2,3,4 are not at the theoretical optimal
position but those are not at a very bad location either. By tweaking the
optical path the signal can be improved but we cannot expect more than a factor
of 2 improvement.
(Matt) Worked on length control and locking in Advanced LIGO
simulation. Following the approach used
at the 40m lab, I was able to lock at the operating point. The final step, moving CARM (Common Arm mode)
to the operating point, has not yet been performed at the 40m, but this
simulation suggests that their approach is viable. Much work is yet to be done,
but these results also suggest that this approach will work for locking
Advanced LIGO.
(Monica) Calibration of Error signals has been done by calculating open loop
transfer function of the complete model of 40m interferometer. First attempts of locking one arm with the
40m e2e package: all the optics are blocked except the X-arm input mirror(ITMX)
and end mirror (ETMX) which are shaken with white noise.
(Hiro) I installed the version of modeler needed
to run Matt's advLIGO package in: /home/e2e/LinuxHOME and
/home/e2e/Linux64HOME. The first LinuxHOME is the version for 32bit machine, and Linux64HOME
is the one for AMD 64 bit machine. It runs on computer homam,
but does not run on deneb,
the Intel 64 bit machine. Source codes
are still under modification and there is no tar ball release yet.
(Bruce) - Implemented renamable parameter links
(box settings.)
(Melody) Continuing
with fixing the Problem Reports (PR).
Fixed PR 473: Duplicated item placed outside of view. Currently working on PR
482.
Charlton:
Working with Xavi I found a bug in my Matlab script for comparing band-limited RMS in AS_Q vs. h(t) which occasionally caused it to use data where
calibration lines had dropped out for a short time. This appears to have caused
~10 of the large differences I observed (out of around 180 over the whole
science run). After fixing this bug I re-ran the comparison using the H1
DARM_ERR instead of AS_Q as I had done previously. There are still a few large
differences (34 at 5*sigma and 219 at 3*sigma) but overall the match seems to
be better. The standard deviation of 0.45% is an improvement on the 0.80% I
observed when using AS_Q.
This is not yet a final result since Xavi's h(t) used the V1 calibration information and I'm using V3.
I'll need to re-run the comparison when Xavi has
created the next version of h(t).
Mendell:
As reported at the June 2005 LSC meeting, the StackSlide
pipeline for producing upper limits is complete (the previous pipeline produced
estimated upper limits that appear good to within 10%.) Tests by Joe Betzwieser and myself using software and hardware
injections shows that the core StackSlide function,
updated last January by Virginia Re, is working. Some tweaking of the
code is still needed, but it is ready to
Weinstein:
Yakushin:
1) Attended
LSC meeting and burst face to face meeting in
2) Made
a presentation on the status of the S4 untriggered
burst search at the LSC plenary session. This presentation is a rehearsal of
the one I shall make at Amaldi.
3) Worked
with Michele to process LIGO-VIRGO simulated data with waveburst.
Michele presented the preliminary results in face to face meeting in
4) Compared
waveburst triggers on h(t) and AS_Q and reported the
results on this week burst telecon: http://www.ligo-la.caltech.edu/~igor/S4/HT_vs_AS_Q
5) Working
on finalizing Amaldi6 presentation which now turned into a poster since the
burst group got only one talk out of four that were originally submitted.
6) Discovered
a problem with V2 calibration used in SG16_S4 MDC: the injection into H2 were
twice stronger than they should be (in AS_Q only, DARM_ERR channels most like
were not affected, h(t) were not affected).
7) Ran
waveburst on DARM_ERR, V3 calibration, both
production and SG16_S4 simulations. Processing the triggers.
8) Working
on processing more simulated Virgo data with waveburst
so that the results can be presented at Amaldi6.
9) Published
waveburst S4 production and simulation triggers on
h(t) and AS_Q: http://www.ligo-la.caltech.edu/~igor/S4/TRIGGERS
Zanolin(MIT):
Prepared material for a f2f in
The last error message for IFrameStream::ReadFrameH
is now available on the LDAS Development System through the C++ method GetLastError().
This resolves Problem Report 2019.
Work has started on resolving the difference between the FrProcData
elements and the underlying FrVect data elements that
has been identified through the Problem Report 2823.
About 70% of the C++ code has been written for supporting the
"-no-metadata- check" option for the createRDS
command associated with Problem Report 2824.
Added seed.cmd to the controlMonitorAPI's client to initialize the database after
a database reconstruction. This is needed to successfully run the conditionData tests.
Fixed a test wrapping problem when viewing the resourse files. The display of multiple lines in the
resourse file is now fixed as well.
Continued to fix "interim results" problem report associated with
the running of all the user commands from a single submit in the controlMonitorAPI's client. This required minor changes to
the nodeUsers test and the createLDASdb
script.
Ran system and integration tests on LDAS 1.6.10. Identified
a problem with the dataConditionAPI leaking objects.
Conducting similar tests on the LDAS 1.6.0 release on
LDAS-Test to see if the problem was introduced by recent changes to the frameAPI's C++ code.
Set up the LDAS-DEV system to simulate a beowulf cluster using a single host. The remaining
nodes from the LDAS-DEV system will be donated to the OSG integration testbed project.
The sinstall rules for rsync
(PR2826) and wget (PR2841) have been modified for the
latest versions of these packages.
The issue of memory corruption observed in the Globus
Toolkit 4.0 port is now understood. By default, the Globus
Toolkit 4.0 port was compiled multi- threaded which revealed a short coming in
the Tcl API of accurately detecting which thread was
running the code. As a result, any asynchronous callback was causing the Tcl interpreter to execute in two concurrent threads
causing the code instability. The pthread library is now
being used. The code still needs one more modification to support Tcl's Thread extension package. This will be done early next week.
Modified XIO asynchronous client/server test case to be able to run with
threaded or non-threaded Globus
Fixed SWIG-wrapped asynchronous vector write function. The fix is to check
if size of vector buffer is 0, then set the pointer to
NULL to prevent any memory corruption.
Worked with Ed fixing segmentation fault caused by
asynchronous test cases. Have
been running the test cases with the fix since last night and there is no
segmentation fault and no memory leaks.
Continue to improve the Tcl/Globus website and
documentation associated with the next release of the code.
In preparation for initial installation of OSG 0.2.1 release of middleware
on a LIGO test bed (osg-itb.ligo.caltech.edu) performed the following:
Obtained a system cert for the future head node of the test bed cluster Tested my personal cert on an LSC site and verified the cert
is good. Reviewed the installation
requirements and instructions for installing a computing element node as specified
in the OSG CE Install Guide. Met with
the hardware POC (Stuart Anderson) and coordinated planning on preparing the hardware for the OSG
test bed. Began reviewing documents on
the GUMS privilege system and its interaction with other security components. Reviewed OSG overview docs
including "A Blueprint for the Open Science Grid". Investigated resource
allocation for shared volumes on the osg-itb test
bed. Reached agreement on the external name for the test bed:
"LIGO-CIT-ITB". Began monitoring several OSG mailing lists relevant to tasking.
At this week's LSC Comp Comm meeting discussed
plans for setting up a LIGO- wide VOMS server to securely distribute
authentication information onto the OSG grid. This will be established at PSU.
PSU will also be filling out the registration form for this VOMS service with
the OSG. This is expected to be completed by the end of next week.
Also discussed plans for migrating the LSC's GRID3
clusters at UWM and PSU onto the OSG. UWM expects to have this done within a
few days to a week. PSU will follow
shortly after they have established the VOMS service.
(Dan Kozak)
-
combined /archive &
/cluster.
-
converted /frames & /archive
to use md devices.
-
SAM-QFS/FS 4.3.11 on gateway/dataserver/fb1.
-
SAN-4.4.2 on gateway/dataserver/fb1.
-
built new RAID sets in 3511s,
now 10+1+1 hot spare.
(Phil Ehrens)
(Stuart Anderson)
(Keith Bayer)
(Igor Yakushin)
(Greg Mendell)
As announced to DASWG on May 31, 2005, the createrds.tcl
and createrdsGUI.tcl have been updated to improve RDS
generation in several ways and to take advantage of new options in the 1.6.0
release of LDAS. Improvements, tests, and new options are:
1) Alignment
of output frames with the output frame length.
2) Improved
the algorithm for determining that a gap exists.
3) Tests
of generating L3 data directly from raw data; this works.
4) Tests
of LDAS v1.6.0 options to merge of input frames of different types; this works
though some changes to merge GEO frames with LIGO frames are still needed.
5) Astro-watch RDS generation started using the new code on
May 27, 2005. The code was tested
extensively over a 4 day period as well, and all tests passed.
6) The
scripts are available here: CVS/Root =
:pserver:anonymous@gravity.phys.uwm.edu:2402/usr/local/cvs/lscsoft, CVS/Repository
= dsorun/contrib/createrds/scripts
(Keith)
(
From last week which didn't make it into the weekly:
From this week:
Monday we decided to replace the
interface cards in the Goodwood C.O., however they
had to be ordered. They shipped out
Tuesday and were received on Wednesday.
They were replaced at ~4:30 AM central time. At this point all I can do is watch my logs
and see if this fixed the problem. Also,
Boyd (LSU) and I worked a couple of solutions on his router. The long term outages should not really
happen again unless we have lost light totally on the circuit. After 5 minutes, Boyd's router should auto-recover
from the errors that we have been seeing on the circuit. If we continue to have issues on the circuit,
they are now talking about flying a guy in from
This would mean some significant
downtime that would have to be scheduled.
(Christine)
(Mike)
(Veronica)
(Larry)
from Dennis
Coyne
See also:
See also the RODA
status web page
See the
"Interfaces" section of the AL Systems web
page
Residual Gas
Assay (RGA)
See also the Vacuum Bake Lab
Bob Taylor
High-Irradiance,
Contamination-Exposure Cavities
Lee Cardenas, Liyuan Zhang
Glenair Micro-D connector test report is pending; passed vacuum compatibility testing.
|
Cavity (Location) |
Material/Item |
Start |
End |
Comments |
|
Cavity #1 (OTF Lab,
Bridge) |
Will place Nd-B-Fe magnets into the cavity next (stepper motor removed & back into the queue) |
~6/8 |
TBD |
Replaced 70ppm REO mirrors. Power is at 155 mW. Last week: Power dropped from 175 mW to ~25 mW after introducing
the stepper motor sample, and continues to decrease. It is very hard to keep cavity locked. The
stepper motor may have contaminated the mirrors. |
|
Cavity #2 (OTF
Lab, Lauritsen) |
NA |
NA |
NA |
no
change cavity is close to being ready for samples |
|
Cavity #3 (OTF Lab, Lauritsen) |
OSEM emitter & photodiode (Dennis Coyne, SUS ) |
~6/10 |
~9/10 |
Started the optical contamination cavity testing on these OSEM devices. So far the ring down & absorption measurements indicate that there is no change. |
|
Queue Priority 1 |
OSEM Flexi-circuit cable,
qty ~ 45 (Helena Armandula, SUS) To be supplied by Univ. Birmingham
(Stuart Aston); |
TBD |
TBD |
DuPont
Flexible Circuits. The whole part to be constructed of 'flexi' i.e. no
'rigid' sections. (Stuart Aston, (document link: http://www.dupont.com/fcm/products/H-73244.pdf Coverlay (x2): Kapton
(LF0110) (document link: http://www.dupont.com/fcm/products/H-73245.pdf DuPont Pyralux
Series - Kapton / Acrylic Adhesive system. (document link: http://www.dupont.com/fcm/products/H-73246.pdf |
|
Queue Priority 2 |
MMG nickel plated Nd-B-Fe magnets (Helena Armandula, SUS ) |
TBD |
TBD |
Vacuum bake & RGA completed Comprised of sintered 24% Neodimium, 75% Iron, 1% Boron by weight and may contain traces of fully alloyed Cobalt and Dysprosium. The coating is electroless nickel, 10-15 um thick on top of a thin copper layer. |
|
Queue Priority 3 |
Stepper Motor (Riccardo DeSalvo, possible SUS or ISC use) |
TBD |
TBD |
|
Large Item
Cleaning Plan/Facility
Ken Mailand
|
Date |
Subsys |
Review |
Topic(s) |
Enabling event(s) |
Schedule motivation |
|
|
June, 05 |
SEI |
BSC
Critical Design Review 3 |
review
basic requirements, interfaces & dynamic coupling |
available
analysis/reports |
timely decision
on proceeding with SEI/BSC prototype for LASTI for integration with the SUS
quad prototype |
|
|
~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 |
|
|
15-Jun |
SUS |
PDR,
Review 1 |
Requirements
update |
completion
of the DRD update |
ensure
RAL effort working on proper baseline |
done |
|
Jun 29,30? |
ISC/40m |
40m DC
Readout Review |
DC
readout experiment |
|
|
|
|
Jul 11-13 |
SYS |
SYS Mtg |
CDS Infrastructure & HAM Isolation Requirements |
|
|
scheduled |
|
12-Jul |
SUS |
PDR,
Review 2 |
Electroncis req & design; Focus is on
the front end electronics ( |
|
|
scheduled |
|
~Sep |
SUS |
PDR,
Review 3 |
Quad
design |
Completion
of the quad controls prototype assembly; |
timely
transfer, to RAL & UB efforts, of lessons learned from the controls
prototype |
|
|
~Nov |
SUS |
PDR,
Review 4 |
Quad
Installation |
Completion
of installation at LASTI |
Inform
the |
|
|
~Dec |
SUS |
PDR,
Review 5 |
Triple
design |
Available
SUS/US staff |
Enable
SUS/US final design phase |
|
|
~Feb |
SUS |
PDR,
Review 6 |
quad
controls prototype test results |
completion
of LASTI testing |
timely
incorporation into final design effort on the noise prototype |
|
|
TBD |
SUS |
PDR,
Review 7 |
BS, FM/ITM
SUS design |
design
work completion (has yet to start on FM/ITM, not mature for RM) |
|
|
|
Sep |
AOS |
Stray
Light Control, DRR/CD |
|
SYS PDR? |
primavera
late finish 6/15/05 |
|
|
TBD |
AOS |
Thermal
Comp., DRR/CD |
|
SYS PDR? |
|
|
|
~Oct |
SYS |
PDR,
Review 1 |
Engineering
& Implementation ('generic') Requirements; |
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 |
|
|
~Dec |
SYS |
PDR,
Review 2 |
CDS
Infrastructure |
Sufficient
CDS requirements & concept work (also 7/11-13 mtg) |
CDS
Infrastructure is key to subsystem electronics req. |
|
|
~Sep |
IO |
PDR
Review 1 |
Faraday
Isolator |
SYS PDR? |
|
|
|
~Jan |
IO |
PDR
Review 2 |
Electro-Optic
Modulator |
|
|
|
|
~Mar |
IO |
PDR
Review 3 |
Mode
Matching Telescope |
Determination
of whether a stable recycling cavity will become part of the |
|
|
|
TBD |
COC |
PDR |
|
SYS PDR? |
|
|
From: Jay Heefner <jay@ligo.caltech.edu>
From: Ken Mason kmason@ligo.mit.edu
We initiated talks with ASI to contract them to soften the stage 0-1 and stage 1-2 springs. They will be supplying us an estimate of time and costs next week. Our plan is to supply to ASI the approximate blade geometry. They will calculate launch angles, interface shapes, stiffness matrix, and make modifications to the parts. At that point we will take these design changes and update the detailed drawings.
Dwight Carter, Carol Wilkinson, and I have had several meetings redefining the schedule for the prototype and production isolation systems.
The design and fabrication drawings for the test stand used to assemble and test the advanced ligo seismic isolation and quad suspension has been completed. The drawings have been sent out to fabrication shops for quote.
Rich Mittleman and I are putting togther a plan for alignment and leveling of the test stand at LASTI.
From: "Joseph A.
Giaime" jgiaime@ligo.phys.lsu.edu
Agenda for the weekly SEI phonecall Friday, June 10, 2pm Eastern, 1pm Central, 11am Pacific time
Announcements
Electronics (Jay)
BSC amplification (Rich, Ken, Pradeep) (see cool pictures in the lasti ilog )
LASTI test stand (Ken)
Modeling for softer springs (Brian L.)
From: Jay Heefner jay@ligo.caltech.edu
From: Janeen Romie <romie_j@ligo.caltech.edu>
Working on the Universal SUS DRD in preparation for the SUS DRR Update today. Made viewgraphs for various team members and posted documents and viewgraphs on my web page.
Will meet with Carol tomorrow morning about cost book information and organization. Will hold a telecon with Caroline and Helena prior to iron out some details. Worked this week on preparing for this.
Yesterday, visited Datum Control and Nelson Grinding in
From: ctorrie <ctorrie@ligo.caltech.edu>
SolidWorks and PDMWorks
We have now all of the add-on's associated with SolidWorks 2005 and PDMWorks 2005 working. All of the Caltech licences are SolidWorks (Research) Office Professional Seats.
Quad Suspension
Work on the upper structure is progressing very well. reference the June photograph section http://www.ligo.caltech.edu/~ctorrie/pictures/QUAD-JUNE-2005-01/QuadJUNE2005-01.html The clean room has also been installed in the lab. Helena, Janeen and I plan to suspend one chain from a fixed top mass to further investigate the clamps associated with the upper intermediate stage.
Design Meeting
http://www.ligo.caltech.edu/~ctorrie/QUAD_ETM/quad_etm_setup_page2.html
Visits
Janeen and visited the 2 machine shops in
Drum End Wires
As part of our on going research into drum ended wires. The company it
From: Helena Armandula ahelena@ligo.caltech.edu
Adv. LIGO SUS
Building of the clean room in the Synchrotron Lab. is complete. By Friday, Caltech's electrical maintenance personnel will make the electrical connections for the lights and fans to the Synchrotron's electrical lines. Also, the optical tables will be moved back in place, allowing for the assembly of the Quad to move forward.
From: Bill Kells <kells@ligo.caltech.edu>
Besides ongoing work on understanding the TM HR mirror quality (see my
report to Fred), I have got swept up in the new surge of interest in the
"parametric instability", particularly w.r.t
the rather dire proclamations of the Peth group. I
believe we must conduct some characteristic experiment to understand this
phenomenon (the fact that AdL will nominally attain
the instability threshold is undeniable). But the situation is more complex and
subtle than the
Also, I am writing code (actually expanding existing Mathematica algorithms I had already developed) to answer a recent question: What should be the PRC/SRC optical surface tolerances (esp. just ROC) for AdL optics? I realized that a simple modal model should suffice for getting overall orientation on this (with, ultimately a full FFT to detail). Then, there are a host of similar questions that can concommitantly be resolved with this approach. Results soon: its simple/easy to use!
From: Peter King pking@ligo.caltech.edu
No report this week.
From: Phil Willems
<willems@ligo.caltech.edu>
We have begun assembling the equipment to for the preliminary design of the carbon dioxide laser compensator. The laser and optics are here, the AOM and photodiode are on order. For now we are using a spare TCS chiller which we are plumbing into Caltech's site chilled water.
We have also extracted a Texas Instruments DLP micromirror array from a display projector and tried to remove the glass window to test its utility as a spatially modulating reflective mask for 10.6um radiation. The first attempt shattered the window, likely making the array inoperable, but we can now reverse engineer the construction to see if we can get the next window out cleanly.
We investigated an alternative technology, a "grating light valve," that works like a micromirror array, except that rather than tilt tiny mirrors it forms tiny gratings, diffracting unwanted light. It would be an attractive technology but the versions offered by the one company who makes them work at 1um, not 10.6um (gratings, unlike mirrors, care a lot about wavelength).
From: Michael Smith smith@ligo.caltech.edu
BS DIFFRACTION LOSS
A revised doc, T-50066-03 BS Diffraction Loss (AdLIGO), was completed. It will be distributed to the DCC shortly.
SURF
My SURF students have washed up on the campus. Aabeg
and Shasta are learning how to use Matlab and the
ABCD matrix method for calculating Gaussian beam propagation. All of the needed
equipment is available for the BRDF experiment; Peter King has an 80 MHz AOM
driver. I am awaiting help from Ben Abbot for the QPD readout for the Oplev receiver experiment.
From: Riccardo DeSalvo
desalvo@ligo.caltech.edu
Marco
We were able to lock the cavity with the Mexican Hat mirror 5008 on higher
order modes such as TEM10 and TEM11. Until now we haven?t seen a stable fundamental mode (
Juri
I made some graphs for the Amaldi6 presentation, showing the results of the calculation of the thermal noise in finite size fused silica substrate test masses: they show the noise reduction we expect in using a Mesa Beam instead of a Gaussian Beam. I started working with Bench2 in order to calculate also the improvements in the expected range for NS-NS.
I worked with Marco on the computation of the theoretical spectrum of the cavity and on the simulations with the real map of the mirror we are using.
Chiara
After the introduction of cylinders under the plane which supports the experimental set-up we have found the new balance of the system working on the soft springs attached under the table. Now I?m starting the new set of measurements with the accelerometers using the spectrum analyzer. Still taking classes in the Machine Shop.
John
After the SURF meetings and orientation, I started working with Marco on the alignment of the output optics for the Mexican Hat cavity and I’m studying the problem of input mode matching.
For additional information about this report, contact Phil Lindquist