The LIGO Executive Committee Agenda for Monday Jul7 11, 2005 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items:
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>
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Packages |
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Faxes |
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>From: Esther Cunningham <esther@ligo.caltech.edu>
>From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
>From: Florence Kaufman <fkaufman>
>From: Gina Salone <gsalone@ligo.caltech.edu>
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
>Irene Baldon
>Julie
Hiroto jhiroto@ligo.caltech.edu
>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 assembling and editing the annual report. A first draft of the budget and proposal for FY 2007 and 2008 has been entered into FastLane and provided to management for comment/adjustments.
Our next scheduled meeting will be on Wednesday, July 13, 2005.
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
>From: Bill Tyler tyler@ligo.caltech.edu
No report.
Due to the vent last week and the ongoing pump down the commissioning activities this week were fairly limited. The old 4K ITMX was sent back to Caltech for further investigation. The vacuum pressure in the 4K vertex is currently around 6-7 x 10^-7 torr.
We had a short period where we closed the gate valves to the arms and opened the gate valves of the 4K vertex to check the alignment of ITMX with its optical level. To reach the old alignment the resistors in the bias module had to be changed to lower values. The 4K is currently locked in PRM.
The 80 Hz bump in the 2K spectra could be made worse by increasing the
acoustic noise near ISCT10---indicating that there is an acoustic coupling path
near the anti-symmetric port. (http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=07/02/2005&anchor_to_scroll_to=2005:07:02:17:21:30-robert)
We are monitoring Hurricane Dennis as it enters the gulf and are making preparations for LLO site shutdown and evacuation if (and only if) forecasts warrant. We will issue announcements to ligo-all as needed; your forbearance and cooperation with evacuation orders, if any, will be greatly appreciated.
--Mike
There was another five minute power outage during the last weekend due to the storm. The interferometer low noise operation was recovered after the storm but the sensitivity was a factor of two to three below the nominal performance.
The trouble shooting of the electronics problem related and unrelated to the power outage continued most of the week. The list of included the LSC whitening electronics, transmission monitor electronics, optical lever laser, and 5V power supply regulators.
The interferometer calibration was performed on Thursday and Friday. The calibration parameters are consistent with the ones obtained before and after the S4 science run within a few percent.
In attempt to improve the Mode Cleaner visibility several optics on the Mode Cleaner optical table were replaced with the optics that have the correct polarization. The number of optic elements was also reduced. The visibility of the Mode Cleaner did not improve after this rework.
no report
Most of this week has been spent working on cleaning spyware out of PCs still. One PC was infected so badly that I will have to reload it. The user only needs email and web browsing capability so I am considering loading Linux on it. This will solve the virus and spyware issues on that PC while still allowing the user to email and web browse.
Thinking about how to get some useable statistics out of snort. It is providing lots of information but I do
not have an easy way to share this information.
It may involve purchasing a commercial software package if I can not
find an
Since 6/30/05:
SSH brute force scans: 7,343
TCP port scans: ~3,950
web related alerts: 8,674 (many false alarms)
trojan/virus alerts: 1,241
There was some activity on the network recently that needs to be addressed. I have the MAC address of the person (00:90:f5:29:7f:81) but I have not been able to identify the owner of the laptop.
Working on updating the support web page now that it is back up. All of the printer docs will change once I have relocated the printers to new IP addresses.
HPLF news: Received three new high power optics from CVI Laser. Started to test them but noticed a 10 % drop in output power of the laser. After some testing I also noticed that the power also exhibited a fluctuation level higher than usual. Shut down the experiment and packed the laser, which is now waiting for FedEx to pick it up for shipping back to the IPG engineers, who will evaluate the status.
REFL port beam stabilization system: Due to some issues with the design of the Piezo Jena PZT vacuum compatible cabling, the estimated delivery time has been set back to late August. The design of the mounting hardware is ready and will be submitted to the workshop within short.
AdL Quad SUS Installation Fixtures
AdL SEI Engineering
General Engineering
We have received two new DMT/GDS servers, and are going to mount one in the Mass Storage Room and the other in the Computer User's Room. The one in the Computer User's Room will be on the GC network.
Lisa is on travel this week.
1) Developed a diagnostic tool to monitor the functionality of the front-end controllers.
2) Prepared a concise procedure for bringing up the CDS controllers after a power outage situation.
3) Continued work on the mapping of the CDS signals.
Condor/Data archiving/LDAS admin:
1) Bought 16 512Mb spare memory DIMMs. In particular, one or two DIMMs will be needed to fix node31.
2) We had a few minute power outage at LLO last week. UPS kept all the servers and storage alive through the outage. Only the nodes were rebooted. Couple nodes did not restart automatically and had to be booted manually. After the outage, there was a problem with LDAS which might or might not be related (createRDS jobs were crashing). Restarting LDAS fixed the problem. However, several days later, diskcacheAPI started misbehaving again: frame queries and createRDS jobs would not run. Restarting diskcacheAPI fixed the problem for now.
from Dennis Coyne
see also the CDS weekly meeting minutes in the commissioning archives
no report
Ben Abbott
1) 8
PDs are fully assembled and tested. These are all being boxed up to ship
out today to
2) A
second flock of photodiodes is underway which will provide the last few
photodiodes needed by the sites, according to the original list, and a few extras
for spare spares. The photodiodes that are still needed are: 33.3MHz for
3) All of the machine shop parts are in now, and the boxes are being sent out for their machining later today.
4) I'm still waiting for a few parts to arrive so that I can send the new boards off to Screaming Circuits for assembly.
no report
no report
Note from D. Coyne: We are considering raising the arm cavity baffles at the end stations since recent measurements indicate that up-conversion from a scattering source is just visible in the interferometer noise spectrum. The arm cavity baffle at the corner station would preclude use of the TCS (which was added after the baffle was designed). The arm cavity baffles are in the vacuum system but not positioned on their support structures.
Mike Smith
I used ZEMAX to calculate the diffraction around the ITM due to insertion of the arm cavity baffle near the ETM. I assumed that the same amount of power is diffracted toward the ITM surface. My edge-diffraction model agrees within a factor of 2 with the ZEMAX calculation over three orders of magnitude of diffracted power. I used my model to extrapolate the ZEMAX results to a baffle diameter of 270 mm. The diffracted power around the ITM with 5000 W circulating power in the IFO is 5 E-14 W. I reported previously (T980027-01) that the effective length of the diffracting edge is reduced due to coherent cancellation of the field because of the differing path lengths from the different parts of the tilted edge; with a tilt of 57 deg, the diffracted power is reduced by a factor 1E-6. Therefore, the diffracted power into the IFO from the baffle edge is approx. 5 E-20 W. This is well below the requirement for the arm cavity baffle of < 3 E-18 W.
The BRDF of the baffle edge @ 33 deg incidence was assumed = 0.3 sr^-1 (corresponding to a Lambertian scatterer). The scattered power into the IFO is 7 E-21; this is well below the requirement for the arm cavity baffle of < 3 E-18 W.
Note from D. Coyne: A plan for analysis of the ITMx optic just removed from H1 due to anomalously high absorption (~15 ppm) is being prepared by a group led by Bill Kells. The first step will be confirmation of high absorption in the Reflection/Transmission Scanner system at Caltech.
Liyuan Zhang, Lee Cardenas
The measurement for AR, HR scattering for the 4ITM04 as well as the bulk absorption measurement has been completed. The data and results will be provided soon by Liyuan Zhang.
We are preparing the set-up to be ready for 4ITM07 (the ITMx optic recently removed from H1) when it arrives.
No report (in Stockholm).
Since our last report, we have unpacked the mirrors, inspected them, and started gluing magnets on them. Kate and Chinyere have been locking the TNI with sapphire mirrors to learn how to calibrate it and to take data.
Kate: While waiting on the new mirrors, learned how to align and lock the TNI, and to model the Pound-Drever error signal. She is currently working on a matlab program, with Eric's help, to convert the error signal to an equivalent length noise and to break down the various individual noise sources. She has read and given presentations on Saulson's 1990 Phys. Rev. D paper, "Thermal Noise in Mechanical Experiments" and Yuri Levin's 1997 paper on mirror thermal noise and inhomogeneous losses. She is currently reading the literature on coating thermal noise, in preparation for interpreting the data from the new mirrors.
Richard: Helped Akira debug the bond-noise experiment; began designing the support system for the load weights in the bond-noise experiment; and started the machine-shop course. He also read and gave a presentation on a paper on non-Gaussian noise (Ageev, Bilenko, Braginsky, and Vyatchanin, Phys. Lett. A 227, 159-164 (1997)).
Royal: Found that the photothermal experiment was not operational, due to cannibalization of optics by other experiments. Read paper on Pound-Drever locking; wrote matlab code to plot the Pound-Drever error signal for different modulation frequencies, cavity-mirror reflectivities, and phases; explored the Pound-Drever error signal in the low-modulation-frequency regime, which is applicable to the photothermal experiment; read paper on mode matching (Kogelnik and Li); wrote matlab code to calculate mode matching distances and waists; stripped out all old optics from photothermal experiment (after making a careful record, in case she wanted to recover the state as she found it); calculated new mode matching; mode matched to photothermal cavity using her new solution; aligned the beam to the cavity, and locked the laser to it. This pretty much completes the probe-beam path for the photothermal experiment. Also, she read and gave a presentation on Braginsky's original paper describing thermoelastic-damping noise and photothermal noise (Braginsky, Gorodetsky, and Vyatchanin, Phys. Lett. A 264, 1-10 (1999)).
(From: Richard Mittleman)
Ken is continuing to make progress on the BSC-FEA model. He has added the concrete floor and the chamber.
Myron is working on assembling and testing the hardware needed to lift the spacer and quad-pendulum assembly in the chamber. The decision to insert the entire structure as a unit has significantly increased the load.
Rich has been working on the problem of the non-linearity and the hysteresis of the low frequency BSC HEPI transfer functions. There is an ilog entry on the Lasti ilog on July 1, 2005 with some data and preliminary conclusions. An update will be posted soon.
(from Biplab)
(Melody)
Shourov:
Started working with Isabel Leonor and Lindy Blackburn on producing a review document for the Q Pipeline.
Continued working with Sahand Hormoz on an extension to the Q Pipeline to target positions of interest on the sky. Sahand is currently developing the necessary code base for such a search.
Working with Patrick Sutton, Massimo Tinto, Antony Searle, Leo Stein and Albert Lazzarini on extensions to the Gursel-Tinto method to coherently search for bursts in three or more non-aligned detectors.
Working on integrating data conditioning and frame reading functions from the Q Pipeline into such a search. I am also testing the possibility of using such a coherent approach within the Q Pipeline.
Performed cross-validation of our detector response code for network
analysis with the simulated bursts injections for project 1B of the LIGO/Virgo
joint data analysis working group. The
results show reasonable agreement in both timing and attenuation of bursts with
random linear polarization as seen in
Continuing trigger production for S3 detector characterization and veto studies.
Mendell:
Joe Betzwieser and I are setting up to use the StackSlide code to analyze the S4 data, though the usual distractions have prevented us from getting as much done as we had hoped. I have promised a progress report at next weeks pulsar telecon, however.
Searle(ANU visitor):
More planning for implementation. Investigation into significance of two remaining orthonormal (but not null) "residual" streams. Sum of null and residual chi^2 or power is constant wrt sky position, equal to total power of whitened detector streams. This means null stream \chi^2 can be computed from the residuals or vice versa, so only two streams need consideration for any N. Now looking at expected distributions, thresholds, statistics etc. to completely determine meaning (confidence etc.) of results.
Shawhan:
Yakushin:
Zanolin:
LDAS
Started the investigation as to why the wrapper tar ball for 1.6.0 for Anand did not succeed (PR#2842). When built on ldas-pcdev3, there were no issues. Need to look into the build logs for his build.
Worked with Stuart to try to reproduce the issue of LDAS' blindness to files on /archive (PR#2722). In the midst of this, the unbalanced '{' has reappeared and appears to be due to string truncation at the C++ layer. Code is in place to give more feedback so that this problem can be analyzed and corrected.
Reviewed the components of LDAS that will need to be modified to correct for the January 2006 leapsecond that is on the way. Found three areas where leap- second information is used. Began reviewing these to identify a common solution.
The migration away from NFS file services to QFS file services on the LDAS DEV and tandem systems has reduced overall LDAS performance by a bit more than 10 percent. In addition, many of our system and integration tests are now failing and need to be modified to work with this new file system and its unique issues.
With the down time from the QFS file system migration and the down time due to the chilled water work which resulted in further LDAS DEV and Tandem down time this week, we approached the DASWG with a request to delay the next release of LDAS until July 27th. This is found acceptable by the DASWG as most other LSC software projects are expecting to be a week or two later on delivery as well.
TCLGLOBUS
Released TclGlobus version 0.2.0 to the LSC last week. RPMs were made compatible with LSCSoft repository and handed off to Patrick Brady for inclusion in the LSC RPM repository.
Began addressing the issues with threaded support that didn't make it into the 0.2.0 release of the software.
OSG
Drafted a pre-proposal to the OSG for consideration at the July OSG consortium meeting in Milwaukee. This element of LIGO's pre-proposal looks at our involvement in the integration testbed.
Discussed meaningful topics to cover in a presentation at the OSG consortium meeting in Milwaukee to address LIGO's involvement in OSG.
Configured the Grid User Management System (GUMS) including Apache, Axis, MySQL, and Tomcat. Installed initial GUMS server and GUMS client tools. Tested the "instant gratification" gums.config groupMapping. Discovered undocumented requirements for X.509 certificates that were posted to osg-int mailing list by another engineer also working on GUMS. Found problem with initial authorization to GUMS server when using either a web browser or the command line tool "gums generateGridMapfile". Further debugging and analysis will be required. Early attempts to configure GUMS on the OSG Gatekeeper failed so moved the GUMS onto TclProxy server. This actually makes for a more secure configuration as recommended by the Priveledged Project Group.
Caltech
(Dan Kozak)
(Phil Ehrens)
(Stuart Anderson)
(Igor Yakushin)
(Keith)
Nothing to report
(
Since 6/30/05:
SSH brute force scans: 7,343
TCP port scans: ~3,950
web related alerts: 8,674 (many false alarms)
trojan/virus alerts: 1,241
(Christine)
(Mike)
(Veronica)
(Christian)
(Larry)
|
Mail Statistics |
June 30 - July 06, 2005 |
|
Rejected Messages |
22,722 |
|
Virus Messages |
906 |
|
False Positives |
176 |
|
Accepted Messages |
10,125 |
|
Total Messages |
32,847 |
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
|
Cavity (Location) |
Material/Item |
Start |
End |
Comments |
|
Cavity #1 (OTF Lab, Bridge) |
MMG nickel plated Nd-B-Fe magnets (Helena Armandula, SUS ) |
~6/8 |
TBD |
No Change
So far daily ring down & absorption measurements indicate that there is
no change. Added 40 small Nd-B-Fe magnets into the cavity |
|
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 40 of each, (Dennis Coyne, SUS ) |
~6/10 |
~9/10 |
No Change So far daily ring down & absorption measurements indicate that there is no change. |
|
Queue Priority 1 |
2 Cleaned 50ppm transmission mirrors, 1 in dia., REO coated -- |
TBD |
TBD |
witness samples for the LHO vertex volume (added in 6/29/2005 vent) |
|
Queue Priority 2 |
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 3 |
Stepper Motor (Riccardo DeSalvo, possible SUS or ISC use) |
TBD |
TBD |
Stepper Motor sample had been placed into Cavity #1: 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. Will re-test when a cvity becomes available again. |
(from Carol Wilkinson)
Progress updates for Advanced LIGO subsystem development for the period from May 1 to June 30 are due July 14.
Only Change since last week: COC metrology review ~10/05
|
Date |
Subsys |
Review |
Topic(s) |
Enabling event(s) |
Schedule motivation |
|
|
Jul 7 |
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 |
scheduled |
|
Jul 11-13 |
SYS |
SYS Mtg |
|
|
scheduled |
|
|
12-Jul |
SUS |
PDR,
Review 2 |
Electronics
req & design; Focus is on the front end electronics ( |
|
|
scheduled |
|
Jul 19 |
ISC/40m |
40m DC Readout
Review |
DC readout
experiment |
|
|
scheduled |
|
~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 |
|
|
~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 |
|
|
|
~Oct |
COC |
PDR Review 1 |
Metrology |
Review
and select vender and in-house metrology |
|
|
|
TBD |
COC |
PDR Review 2 |
|
SYS PDR? |
|
|
From: Ken Mason kmason@ligo.mit.edu
A document has been written (T050113-00) which describes the requirements, analysis, and alignment procedures for the Advanced LIGO test stand being built for LASTI.
From: "Joseph A.
Giaime" jgiaime@ligo.phys.lsu.edu
From: Janeen Romie romie_j@ligo.caltech.edu
Tim Hayler from RAL has joined us for a week here at Caltech. He’ll be working on the ITM suspension, specifically the thermal compensation design, with Phil Willems and Mike Smith. He’s also met with Mike Gerfen and Calum yesterday to go over the fabrication process for the upper structure. Mike is doing the final machining on the upper structure and hopes to be able to deliver it on Tuesday.
Datum Control will have the lower structure ready at noon tomorrow. I’ll go down and pick up the parts. Valley Precision has all parts ready. I picked up the dummy tablecloth for the Stanford structure Tuesday, along with other structure parts. Calum is picking up more parts from Valley Precision this morning. Mike Gerfen has a number of parts ready for us as well.
Working on the spacer for the LASTI mode cleaner.
Working with Bram Slagmolen on the small optic supsension particulars.
From: ctorrie
<ctorrie@ligo.caltech.edu>
No report this week.
From: Ken mailand kmailand@ligo.caltech.edu
The LIGO large part bake oven arrived Thursday 6-30.
Making simplified S/W drawings of the Adv. LIGO optical component assemblies for import to Zmax, for Mike Smith.
From: "Mark Barton" <mbarton@ligo.caltech.edu>
This week I made improvements to my pendulum modeling toolkit to allow for properly including the wire damping in models using mass beads to approximate violin modes. Formerly, if wire elasticity was enabled for a model, the toolkit assumed that each wire was a massless beam under tension. For tension large compared to the natural stiffness of the wire, this implies that most of the wire bending (and associated energy loss) is very near the end points. When mass beads are introduced to approximate the distributed mass of the wire, this creates new wire endpoints for the purposes of the model, but only the wire bending at the very first and the very last is physically realistic. Thus I added a toolkit feature to allow any particular endpoint to be treated as hinged rather than clamped, and used this in the version of the quad model with violin modes that I recently developed for E2E. I published the new model and toolkit at <http://www.ligo.caltech.edu/~mbarton/SUSmodels/asus4L2V5/>, and Ken Strain is using them to check for interaction with the global control.
From: Jay Heefner <jay@ligo.caltech.edu>
From: Helena Armandula <ahelena@ligo.caltech.edu>
No report this week
From: Peter King pking@ligo.caltech.edu
No report this week
From: Michael Smith <smith@ligo.caltech.edu>
Aabeg is beginning to assemble the OPTLEV receiver apparatus. I am awaiting help from Ben Abbot for the QPD readout.
Shasta has almost completed the assembly of the BRDF apparatus.
Ken M. has created a Solid Works model of the conceptual ring heater and the
elliptical baffle to be attached to the quad SUS. The conceptual design is
estimated to weigh less than 3 kg. A STEP file was given to Tim Hayler of
the
From: Riccardo DeSalvo desalvo@ligo.caltech.edu
Anamaria (David is out for 2 weeks):
I'm still working on the setup, now concentrating on the mass suspension. Still waiting for LVDTs and blades in order to put the electrical part together as well. Then actual data taking will happen.
Marco (28Jun)
First fft simulations showed a good agreement with actual profile data. Offsets and tilts changes the shape of the fundamental mode, but almost always the new one can continue to be considered as a linear superposition of the tem00 and tem01. On Friday John and I rehabilitate again our lab. We switched to a quite-flat input using a 1” lens as an aperture. Now the first peak on the spectrum is the highest. Unfortunately we are locking on misaligned configurations. Comparisons with the theoretical spectrum predictions are in progress.
For additional information about this report, contact Stan Whitcomb or Phil Lindquist