The LIGO Executive Committee Agenda:
No Meeting because of Holiday
Special Items:
no report
.
Summary of Commissioning Activities at
LIGO Hanford Observatory (compiled by M. Landry)
Livingston-like weather resulted in some unexpected sparking
in the mass storage room on Friday night. No long term problems were
noted but investigation is underway to see if we are susceptible to future
strikes.
First-time heavy use (i.e. all 200 nodes) of the LDAS Beowolf cluster loaded AC
units and tripped
power to cluster racks.
Thankfully, elog file are no longer editable!
4K IFO
The 4k digital IO WFS system was installed,
necessitating a ASC front end and EPICS interface upgrade. AM laser
diagnostics were performed
and repeated.
The IO WFS2 loop was closed,
but WFS1 needs more work.
The optical layout for the output mode-cleaner is summarized here. The mode structure of the AS port and
OMC was analyzed.
2K IFO
The 2k was brought to better locking performance throught the weekend,
described in elogs and briefly summarized here,
and with links, here.
The effect of IO WFS on the MC_F spectrum was detailed.
L1 Commissioning highlights (Zucker)
---------------------------------------------------------------------
Main thrust continues to be HEPI installation and commissioning. The HAM
actuator installation in the corner station is now complete, and the crew has
moved on to BSC2. Oddvar has designed an adaptation so IOT1 can roll back in
close to HAM1; we anticipate doing this and getting the mode cleaner back on
line by end of next week. Piping is continuing on schedule.
At the X end BSC, two GS-13 seismometers were installed on the crossbeam as
extra-loop witness sensors. An exercise to rezero the position dial indicators
using DC commands to the actuators succeeded, although it absorbed more of the
DC range than wanted. Another iteration may be indicated to parallel translate
to the best collective average "mid-range".
Rupal did some realignment of the PSL EO modulators to achieve a significant
reduction in residual RFAM. He also is nearly done updating the PSL table
layout to be consistent with H1 and H2 (FSS pickoff before the PMC).
In other developments, Rolf installed and successfully tested the latest
version of the LSC and ASC, EPICS (for Linux), framebuilders, IO WFS, AWG and
ADCU code.
At the Y end, relocation of interferometer electronics to the new rack system
was completed, along with the HEPI electronics installation. Testing is also
concurrent. The corner station EMC-shielded rack and power installation is
nearing completion in the CDS High Bay (formerly known as Clean Storage). The
current plan is to cut over the corner station in two stages this summer, first
moving IO and SUS crates and cables and then, after testing, moving LSC and
ASC.
L1 Commissioning (Frolov)
---------------------------------------------------------------------
I wrote the draft of the technical note on intensity noise coupling
measurement. I also started setting up the TCS optical benches in the optics
lab.
Safety (Rich Riesen)
---------------------------------------------------------------------
Continuing work on Safety Procedures.
Found no site safety concerns during my weekly site tour.
HEPI installation crew continuing excellent safety practices.
Shipped scissor table to Janeen at CIT. It has arrived.
LLO Seismic retrofit (Rich Abbott)
---------------------------------------------------------------------
1. Actuator installation is now taking place on BSC2. All HAMs are
complete with the exception of bolting actuators on HAM3
2. Electronics installation in the Y-end station is essentially
complete. We are in the process of powering things up and checking
connections
3. The piping contractor is still on track for completion during the week
of 7 June
4. Inventory is under way on materials for the LASTI but not complete as
of writing
LLO Seismic retrofit (Oddvar Spjeld)
---------------------------------------------------------------------
Completed
- received the remaining HEPI boots for LLO (10 total, 2 spares)
- completed assembly of (4) HEPI BSC actuator housings for LVEA BSC #2
- re-designed mounting bracket for HEPI housing circuit box, quote requested
- follow-up of IOT1 Leg Modification fabrication, delivery LLO Tuesday 6/1
Ongoing
- assembly of hydraulic actuators for HEPI housings
- started assembly of HEPI housings for the next LVEA BSC chamber
- updating HEPI drawings and models on the PDM Server
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.
* The Bell South circuit has been stable for the last 9 days. I have seen
no interface resets. This is much better than what we have seen almost since
the circuit went live. I will continue to keep a close eye on it over the
next month.
* Added several user accounts on GC. SMC is still not working perfectly,
but several problems have been solved by moving to the new server.
* The new web server is mostly set up. GCC, associated gnu tools, Apache
2.0.49 are all installed.
* I have been going through the web pages and archiving obsolete pages. I have
also been going through the existing pages that will remain and editing where
necessary. Currently there is about 11 GB of files. Some of this
will be archived, but much of it will have to stay. Most of the files are
pictures, etc.
CDS (Parameswariah)
--------------------------------------------------------------------
Rolf and Alex visiting LLO over the weekend. Changes made to epics systems,
hepi ey installed, frame builders upgraded.
fb1 upgraded to solaris 9 and running with the new code.
fb0 upgraded to solaris 9. Have got the A1000, D1000 and the 20 internal disks
configured and mounted. StorEdge 3510 is still being configured. LDAS pointed
me to software I need to get it up and running. Syskonnect Gigabit Ethernet
Card which I installed was found to be bad. Ordered a new card.
Working on autogeneration of HEPI status screens. Testing some code to do this.
This will help to generate status screens for all the nine HEPI systems.
Setting uptest point name resolver to resolv selected test point names from
numbers.
CDS gateway2 - river upgraded to Solaris 9. User accounts and directories put back
in. River back online. Didnt run into any problems while I was watching it over
the past few days.
CDS gateway - london will also be upgraded to Solaris 9.
CDS software support (Khan)
--------------------------------------------------------------------
1) Helping Sany in his analysis of BSC Seismic coupling to the yaw motion of the
optics.
2) Developing test software for ICS110B ADC board.
Data analysis (Yakushin)
---------------------------------------------------------------------
LDAS admin:
1) Configuring LDR on gridmon. Waiting for host/datarobot certificates to be
approved to be able to complete the installation.
2) Configured a new T3 for dmt data. Now it needs to be mounted on the
framebuilder.
3) Got two Fujitsu (instead of requested SEAGATE) replacement disks from SUN.
Data analysis:
1) Studied how waveburst event detection and reconstruction depend on the way
the triple coincidence science time segments are divided into 120 second
intervals used by the ETG: http://www.ligo-la.caltech.edu/~igor/TIMESHIFT.
Presented the results at the burst telecon.
2) During the last week face to face waveburst code review meeting at LLO we
found a minor bug/feature in the waveburst that caused event reconstruction to
be done slightly differently than originally intended and described in the
documentation (although quite legitimate as well). I compared the waveburst
performance on the SG5 MDC frames for the current and corrected versions and
showed that the difference is not significant: http://www.ligo-la.caltech.edu/~igor/BUGEFFECT.
Presented the results at the burst telecon.
3) Helping Michele to learn how run waveburst production and postproduction
scripts for waveburst review.
4) Together with Patrick Sutton trying to figure out what's wrong with SG13
LIGO-TAMA MDC frames (apparently the amplitudes of the injected signals are
wrong while timing and and frequency seem to be OK).
5) Tested the effect of usize bug (now fixed) in the postproduction scripts:
http://www.ligo-la.caltech.edu/~igor/USIZE
E2E analysis of suspensions (Yoshida et al)
---------------------------------------------------------------------
Under collaboration with Caltech e2e group, we investigated the coupling
between translational floor motion and rotational/translational BSC1 table
motions. We obtained the table's translational (in Y direction)/rational
motions by dividing recorded ITMY's position/yaw motions by theoretical
table-to-optic position/yaw transfer functions. We then computed the coherence
between Accelerometer X/Y (ACCX/ACCY) signals and table's translational/yaw
motions. ACCY and table's translational (in Y direction) motion show high
coherence (>0.98) around 6 Hz, 10.5 Hz, 13.5 Hz, and 16 Hz. ACCX and table's
yaw motion show fairly high coherence (>0.85) around 6 Hz and 13.5 Hz,
indicating translation-rotational coupling via BSC stacks. ACCY and table's yaw
motion also shows high coherence (~0.9) around 17.5 Hz. ACCX and table's
translational (in Y direction) does not show clear coherence in the
investigated frequency range of 0 - 20 Hz.
see also the CDS weekly meeting minutes in the commissioning archives
Rolf Bork reporting
- Alex and I spent last four or five days at LLO. Main purpose was to update the systems to latest code versions, same as running at LHO. See elog entries for details.
- Ran into some problems at LLO running DTT. This turned out to be a problem with the Network Time Server (NTS) not seeing satellites. We had to "jump start" the NTS by connecting the antenna going to the DAQ controller. Russ is planning on moving some antennas and will make a new connection to NTS at that time.
- Got the software part of the DAQ going to acquire the HEPI spare channels. However, the cables necessary to connect Spare 2 channels are not in (waiting for cables from manufacturer). I still need to get the latest wiring diagrams for the corner station from Ben Abbott to get the spare channel readouts into the corner station HEPI software.
- Installed the HEPI EY VME modules and got that software up and running.
- Received an email from M. Landry that we need to start working microseismic feedforward for LHO. However, that system will be different than what was previously installed at LLO, so we need to work out the details.
- Still working the new LSC software for the 40m lab. We will schedule an installation/test time, probably next week, depending on their run schedule.
Jay Heefner reporting
Fiber Optic Timing Link (for HEPI compliance with RFI
requirements) (Sander)
===============================
- Jitter measurements show ~10psec jitter on the 4MHz signal. This needs to be compared to the jitter on the 4MHz coming directly out of the GPS receiver.
Timing System Redesign (Flavio)
================================
- A draft block diagram has been sent to Daniel for comment.
- A draft requirements document should be available for comment next week.
Anti-Image Filter for Low Noise DACs (Mohana)
===================================
- Tests of the single op amp prototype should be complete by Friday.
40 M (Jay, Ben)
===================================
- Ben is working on the RF Distribution Drawings
- Ben is checking the PSL and ISS DAQ signals to make sure the gains on the whitening board are appropriate.
- LSC cross connect wiring is complete. Jay will modify the databases next week to add signals.
HEPI (Ben)
=================================
- ordered some 7-foot, 50 pin D-sub, Female - Female
connectored cables from Wilco Wire today. This solves a connector
problem for the HEPI Analog rack.
- The reworked 44-pin cables are shipping this Friday and should be in hand in Livingston on Monday.
- I have shipped 28 of the Pier Interface modules to Livingston. They have all been tested by Don, and passed with no problems.
- There was a change in the rack location numbering for HEPI. This change has now been reflected on my system schematics for both the Y-end, and the Vertex.
LSC PD Redesign (Ben)
====================================
- got the go-ahead from the commissioning group/RTRB to
begin the process of making 10 new RFPDs. The first step will be to
gather all of the existing rework ideas together, and circulate it for
comments. I will do this later this week, and will go from there.
ISS (Flavio)
=====================================
- A modified version of the original servo has been installed on the 40 meter. Initial test results are very encouraging.
- Rana is working on a revision of the ISS requirements (originally written by Mike Z.)
- Flavio issued a block diagram of the revised ISS for review. Revised schematics to be issued soon for review.
EMI Upgrade (Jay, Mohana)
=====================================
- LLO LVEA SUS drawings are 90% complete.
- Feedthroughs and cables will be ordered next week.
Elect Shop (Todd)
======================================
- Continued stuffing and testing of Pier Interface Boards
- Cross connect upgrades for 40M complete.
- Inventoried PDs for the commissioning group.
John Zweizig
This week I modified the Data Quality monitor to allow exclusion of line features in from the Figure-of-merit bands. During S3 the power in the figures of merit bands was dominated by the narrow line features notably calibration, violin/internal mode and power lines. The figures of merit effectively followed these line features and were correspondingly less sensitive to the overall IFO noise level that they were supposed to monitor.
I have also modified the DMT data accessor class so that it can be used to get frequency series data from frames. This has become necessary for the implementation of a frequency-domain calibration class.
PeterKing
I found some problems with the master oscillator monitoring circuit which I suspect is due to a grounding problem. Each time either the master oscillator power monitor, or the amplifier power monitor, was connected the crystal temperature appeared to change by as much as 4 degrees. The 10-W laser output power fluctuates by about 20-25%.
I tried out a new photodetector circuit. Unfortunately the bandwidth was woefully short of the design value, for reasons I have not figured out yet. But I might have to check the photodiode capacitance to see if this is the limiting factor.
PeterKing
Quotations from the three coating vendors (ATF, MLD and REO) have now been received. Delivery for all are 8 weeks ARO.
Mike Smith, Ken Mailand
Sent the uncoated parabolic mirrors to Cascade Optical for gold-coating. A revised schedule for assembly, installation, and commissioning of the LHO and LLO TC systems is awaiting approval. The schedule added an extra week of assembly to allow for late delivery of the housing assembly. Installation will begin on 6/28, and commissioning will begin on 7/12.
Mike Smith, Ken Mailand
Have been working with Ken Mailand to clean up the documentation for the errant beam baffles before submission to the DCC. LHO 4K and 2K are ready for submission.
Lee Cardenas, Liyuan Zhang
OTF Lab. (W. Bridge)
The test for contamination of
(21) pieces of the twisted, shielded, teflon cables are completed.
We are still taking ring down and beat frequency measurements
as well as the RGA of the chamber every other day. NO
CHANGE
Absorption Test Measurement prototype in progress
The scanning for absorption of the15 cm dia. sapphire substrate is in
progress.
the scanning are done at Z= 10, 15, 20, 25, 30 & 35 mm in depth.
We'll continue scanning at other depths in order to have better understanding
of the sapphire absorption.
The fabrication of the rods for the laser enclosure have been completed and
installed in place. We have found the need of three more rods and the
modification
of the two rods of 27" inches. The plates being cut to size still in
PROGRESS! as
the modification have changed the plates dimensions in lenght.
Scatterometer system in standby
OTF Lab at Lauritsen ROOM 38 NO
CHANGE.
Cavity #3
The cavity is locked and we are taking ring down and beat frequency
measurements every
day as well as the RGA for the chamber.
Cavity #2 Test cavity optical set up in standby for further samples. NO CHANGE
PSL.
The 10 watt laser alignment and mode match has been completed.
We (Peter and I) still have the power output not being stable as power degrades
with time.
and the laser is temperature independent as we have change the temperature
without noticing a significant change. So far, we can conclude the power
change it has to do with the power amplifier.
Next option will be to remove the Pockell cell(EOM) from the optical train and
make a new alignment.
no report
HEPI Installation and MC Triple Installation
Myron has installed the four piers on the the Xend HAM and the piers are now
floating on springs. Preparation has begun for the preparation for the upcoming
vent to install the mode cleaner triple pendulum. Laurent has been visiting
Caltech to learn the fine details of the MC triple system.
LASTI Vacuum
We have installed a scroll pump to back the main LASTI turbo pump when we get
to low vacuums (~1e-5 torr). This is to both save continued wear on the
expensive high volume capacity backing pumps and to make the highbay
significantly quieter. We had a diaphram pump fail, that was backing one of the
small annulus turbo pumps. With this experience in mind Jon is pursuing a
pressure guage interlock for the forline of the main LASTI turbo pump.
Controls for HEPI
Lei and Dave have been investigating the implementation of an adaptive feed
forward system for isolation on the HEPI HAM system. This technique was
developed by the Mech Eng department at MIT. Preliminary results are
encouraging with a factor of at least 20 isolation at the Stack Mode peaks.
Ken Mason reports:
Laser Thermal Compensation
Several minor changes were made to the Camera box allowing easier access to the
mirror mount adjustment screws and adding lateral adjustment to the camera. The
drawings have been completed and supplied to the fabrication shops.
Triple Suspension Installation
Viewports and vacuum feedthrus have been ordered and shipped directly to Bob
Taylor at Caltech for vacuum baking. In addition The stack spacers for the
y-end HAM have been shipped to Caltech for clean and bake.
Simulation and Modeling
(Bhawal)
--------------------------------
Collaboration with LAL / Orsay
--------------------------------
Hello and Barsuglia from Virgo LAL/Orsay visited Caltech to discuss the
collaboration between Caltech and Orsay on advanced interferometer
configurations. Alan suggested once again to pursue the 40 modeling using e2e
as an important learning step, and it was agreed that Monica Varvella will work
to develop a 40 m model based on Han2k and SimLIGO, existing LIGO I model.
Hiro, Biplab, Bruce and Melody provided Monica with necessary software, tools and
technical assistance. Monica is going to come back in July for one month, and
for a longer period sometime after. Possibilities to have regular meetings
between Caltech and Orsay have been discussed. Han2k model uses old LSC
algorithm and it did not work as is, and Hiro is working to fix it.
Mirror phase map and FFT study
---------------------------------------------------
Hiro wrote a code to fit the mirror phase map using Zernike polynomial. One
major use of this work is to extract phase map of BS by subtracting the power,
the major aberration, and to see the source of asymmetry. LLO 4K BS has a small
ROC, but the remaining aberration after subtracting tilt and power is worse
than that of LHO4k BS. The image can be viewed at
http://www.ligo.caltech.edu/~e2e/images/LLOBSMap.jpg
Biplab produced field intensity profiles with raw mirror map data and also data
with tilt removed. An example POY intensity profile in hot state of H1 can be
viewed at
http://www.ligo.caltech.edu/~e2e/images/WA4KPOY.jpg
The study of the contribution of these mirror maps on WFS signals and changes
in field profiles after the alignment correction is brought in is now going on.
Note that FFT code does not have any control system in it so the correction is
done manually after calculating WFS signals.
Code development and maintenance
----------------------------------------
Macro in e2e:
Hiro and Bruce worked together about the macro implementation. It is still a
most complicated issue. Bruce is working to fix an inconsistency between Alfi
and modeler and associated tweaks. Hiro is working to make sure that the macro
is implemented as is documented.
Examples and documentation:
Hiro is working to update the e2e document to reflect the latest change in the
e2e 2.0.1 release. He is also fixing some examples which need fixes associated
with this update.
Alfi
----------
(Bruce)
- Finished macro parsing (to not parse them.) (PR 457)
- Working om port movement problems in external view. (PR
391)
- Working on helping modeler in situations where Alfi
has implicitly removed a connection. (PR 444)
(Melody) Fixing several problem reports.
LIGO Data Analysis System
Software Systems (Blackburn)
On Monday and Tuesday we met with Scott Koranda and Patrick Brady of UWM to
discuss and plan out a new deliverable from the LDAS software group. The
deliverable involves extracting the functionality in the diskCacheAPI for
discovering frame files on a file system and making it into a standalone
library that can be used outside of LDAS. In addition, we have been asked to
deliver a testbed TCL driver script that supervises the library in a standalone
process. Also, we've been asked to provide a Python shared object that allows
the C++ diskCache library to be called from a Python script to be developed by
CIT/UWM and possibly other LSC institutions. We have postponed work on LDAS
tasks, making this our highest priority until delivered (hopefully in under 3
weeks). In addition, we have asked and been granted an extension on the next
LDAS release as a result of this high priority critical path task. We now
expect to have the next LDAS release at the end of August.
As of today, we have been able to construct the tarball of the source code for
the standalone diskCache library using LDAS's build rules environment. This
work has only been attempted on a test system and not migrated into CVS yet.
There, the C++ library has been separated from the TCL SWIG shared object and a
new Python SWIG shared object has been created. One of the standard LDAS unit
tests fails as a result of the gross extraction process to remove dependencys
on LDAS from this new deliverable. This will be resolved in short order.
On the LDAS side, work was carried out to clean up several open issues
involving ldcg packages and thier associated SINSTALL rules in the
build-package script.
Effort to port LDAS to the Solaris Compiler Suite continued up until the
definition of the new task to deliver a diskCache Library was put on the table.
Also started working on supporting different I/O characteristics based on
different file system types up until the new task was defined and given highest
priority.
An issue with LDAS system emails was discovered at LHO and demonstrated on
other LDAS systems. The problem has never shown up on any of the CIT LDAS
systems but is thought at this time to be a race condition at the socket level
when connecting with the mail server at LHO. This effort has also been placed
on hold as we work on the diskCache Library task. However, a PR does capture
what has been learned and proposed as a solution.
In the controlMonitorAPI's client graphs additional time standard information
has been aadded to the windows and printouts.
Work has started on providing a GUI to graphically view what frame data is
available under the diskCacheAPI's hash table.
Fine tuning of a timeout parameter for the metaDataAPI was iterated over the
weekend run. A second iteration will be needed this weekend to determine if
doubleing the timeout period is acceptable before commiting changes to CVS.
Worked on PR 2474 associated with the insertion rate variable in the
eventMonitorAPI. C++ changes will now be needed to resolve this open PR.
Carried out integration and system testing on the following: compression test,
createRDS, RDS verification, NDAS verification, datacond MDC, non-standard DSO,
DC to frame, FrProc Read/Write tests and updated results; monitor dev test
results. Also ran frame tests and added new exception tests to the metadataAPI
testsuite to verifying fixes in metadataAPI for DB2 messages, including
deadlock messages.
The diskCacheAPI PR 2455 is ready for CVS. It required changes to both C++ and
TCL code as the getHashNumbers() interface had to be changed. Started working
on PR 2526 also. Code for PR 2407 is now being tested on tandem-5 and LDAS-DEV.
New code is now being tested to throttle the number of jobs in any LDAS API, as
well as, code to throttle number of jobs in the data- ConditionAPI based on
current memory usage.
The LDAS Project webpages on the DASWG website have now been updated to reflect
information that is current as of the LDAS 1.1.0 release. This includes new
pointers to the FAQ, major changes, problem reports closed with that release,
and links to the new dataCondition library used external to LDAS.
Hardware Systems (Anderson)
Caltech
-------
(Dan Kozak)
* Continued retrieving and deleting data from HPSS.
* Unwedged ldas-archive staging a couple of times.
* Imported and FrCheck'd E10 at CIT (the tapes had been shipped but the
metadata never incorporated into the /archive filesystem). LLO
done,
LHO still being FrCheck'd.
* Exported tapes of post S3 data at LHO/LLO for shipping to CIT.
* Made some refinements to the scripts for moving SAM-QFS metadata
between
sites in preparation for firing up the tape shipment pipeline again.
(Al Wilson)
* Replaced memory in dataserver in the dev system.
* Another disk failure in the IDE raid test unit. Replaced and rebuilt
the array.
* Set up a test bb system for using Ben monitoring software. Still
testing the reporting to BB.
(Stuart Anderson)
* Installed and started tested Fedora Core 2 on: laptop, desktop, and
server.
* Verified LDAS passes all expected unit tests on Fedora Core 2.
* Finished publishing old S1 L0 data to LDR (several LDR restarts).
* Ran some createRDS jobs to fill a small hole in S2 RDS data for Condor
users.
* Discussed plans to integrate the LDAS diskcacheAPI and LDR for S4 to
provide automated data discovery.
MIT
---
(Keith Bayer)
* Finished downloading the S2 MDC frames using LDR.
* Restarted LDR on S2 L1 RDS frames.
* Successfully had Laura test the condor installation and run jobs on
the cluster.
Livingston
----------
(Igor Yakushin)
* Configuring LDR on gridmon. Waiting for host/datarobot certificates
to be approved to be able to complete the installation.
* Configured a new T3 for dmt data. Now it needs to be mounted on the
framebuilder.
* Got two Fujitsu (instead of requested SEAGATE) replacement disks from
SUN.
Hanford
-------
(Greg Mendell)
* LLO S3 Level 3 RDS data (i.e., L1:LSC-AS_Q only) is now available at LHO
under /samrds/S3/L3/LLO and from the LHO cluster. (Thus, all of S2 and S3
Level 1 and Level 3 data for LHO and LLO is available at LHO under
/samrds/S[2|3]/L[1|3]/LLO; the Level 3 data is available from the cluster.)
* Added these options to createrds.tcl and creatrdsGUI.tcl scripts:
-filechecksum (validate file checksums), -frametimecheck (validate frame time),
and -framedatavalid (check datavalid flags). These new options work with
LDAS v1.1.0 createRDS jobs. If these flags are set to 1 in the .rsc file
for the scripts then the input frames are checked as indicated and the jobs
returns an error if any check fails. (For example, see the documentation
at
http://www.ldas-cit.ligo.caltech.edu/doc/userAPI/html/createRDS.html.)
(Ben Johnson)
* S3 L3 LLO data has been sprayed across the cluster and published into
the local LDR database at LHO.
* Dealt with power outage in LDAS room on 5/22/2004. All filesystems recovered
successfully after running samfsck several times on each filesystem. Tape
archive also appears to be OK.
* Tweaking AC in LDAS room. On Sunday, 5/23/2004 the temperature in the LDAS
room was creeping up (76F on 10 ton unit) due to positive feedback loop between
the 5ton humidifier and 10ton dehumidifier. Problem has been "fixed"
by increasing the humidity tolerance to 10% on the 5ton.
* Despite electrical power difficulties and issues with the globus-rls-server
in LDR, the cluster has been tested with a 4+ day 100CPU condor job by Xavier
Siemens. The Condor+LDR setup appears to be in basic working condition.
* Replaced disk in t3-15.
* The 5kVA UPS's at Hanford are now on the blue T3 network. Working on a way to
use the 2.2kVA serial-port-only UPS's to perform the auto-poweroff of servers
when the batteries are low.
Data Analysis Activities (Lazzarini)
Creighton:
This week I fixed several bugs in LAL: fixed skewed Galactic population of
inspirals for MC simulations, removed a (rare) infinite recursion in template
placement code for pulsars, and made the root finder to compute start time of
inspirals more robust (needed for low-mass halo objects).
Mendell:
The StackSlide Monte Carlo simulations code is nearly complete, with the goal
of having some preliminary results for the June 5-6 LSC meeting in about 1
week.
Sylvestre:
o I have been working on finishing the S2 analysis by processing the last MDC
frames.
o I have also been working on organizing the documentation for TFClusters in
preparation for its review by the burst group.
Weinstein:
- working on inspiral S2 BNS review
- working on burst astrophysical interpretation section of paper
Yakushin:
1) Studied how waveburst event detection and reconstruction depend on the way
the triple coincidence science time segments are divided into 120 second
intervals used by the ETG:
http://www.ligo-la.caltech.edu/~igor/TIMESHIFT.
Presented the results at the burst telecon.
2) During the last week face to face waveburst code review meeting at LLO we
found a minor bug/feature in the waveburst that caused event reconstruction to
be done slightly differently than originally intended and described in the
documentation (although quite legitimate as well). I compared the waveburst
performance on the SG5 MDC frames for the current and corrected versions and
showed that the difference is not significant:
http://www.ligo-la.caltech.edu/~igor/BUGEFFECT. Presented the results at the
burst telecon.
3) Helping Michele to learn how run waveburst production and
postproduction scripts for waveburst review.
4) Together with Patrick Sutton trying to figure out what's wrong with SG13
LIGO-TAMA MDC frames (apparently the amplitudes of the injected signals are
wrong while timing and and frequency seem to be OK).
5) Tested the effect of usize bug (now fixed) in the postproduction
scripts: http://www.ligo-la.caltech.edu/~igor/USIZE
Lazzarini:
Completed a time-series analysis of the point estimates of Omega_GW from the
H1L1 S2 analysis (23200 data points). The purpose was to make sure there were
no discernible fluctuations in the estimates that were generated over the
course of the 2 months of S2. A harmonic analysis was performed using the
Lomb-Scargle algorithm (cf: Numerical Recipes). A search for secular variations
(e.g., linear drift over 2 months) was performed by regressing a line against
the ~23200 data points. Results indicate that nothing is obviously present in
the time evolution of our results. This allowed us to set up a formalism to use
in S3. Interested people are referred to the stochastic elog, URL:
http://www.ldas-sw.ligo.caltech.edu/ilog/pub/ilog.cgi?
group=stochastic&date_to_view=05/25/2004&anchor_to_scroll_to=2004:05:
27:12:21:50-lazz and the assoicated sub-entry.
Continued work on implementing a targeted stochastic search formalism based on
published techniques. In the course of validating the matlab model I built, I
generated several movies (.MOV Quicktime objects) showing the temporal and
frequency-dependent evolution of the H-L antenna pattern. See
http://www.ligo.caltech.edu/~lazz/distribution/LSC_DataDir1/SGWB/
LHOLLOAntennaPattern_0-500Hz.mov and
http://www.ligo.caltech.edu/~lazz/distribution/LSC_DataDir1/SGWB/
LHOLLOAntennaPattern_0Hz.mov
Last, I generated the f-t map of the geomtric overlap reduction factor for a
targeted stochastic search for a 5x5 deg^2 patch centered on Virgo cluster. See
http://www.ligo.caltech.edu/~lazz/distribution/LSC_DataDir1/SGWB/
Gamma_ft_Virgo.pdf
General Computing (Wallace)
MIT:
(Keith)
-Finishing the new mailserver build
-Installed ideas package on straw
-Continuing to help with LSC conf
-Moved emvogil-2 & emvogil-3 onto ups power
-Moved emvogil-3 over to visitor office for urop
-Registered for Usenix conference (Boston)
-Setup first group of urops on gc
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.
*The Bell South circuit has been stable for the last 9 days. I have seen
no interface resets. This is much better than what we have seen almost
since the circuit went live. I will continue to keep a close eye on it
over the next month.
* Added several user accounts on GC. SMC is still not working perfectly,
but several problems have been solved by moving to the new server.
* The new web server is mostly set up. GCC, associated gnu tools, Apache
2.0.49 are all installed.
* I have been going through the web pages and archiving obsolete pages. I have
also been going through the existing pages that will remain and editing where
necessary. Currently there is about 11 GB of files. Some of this will be
archived, but much of it will have to stay. Most of the files are
pictures, etc.
Hanford:
(Christine)
- Network usage can be seen at
http://www.ligo-wa.caltech.edu/~christin/mrtg/
198.129.208.1_198.129.78.122.html
- Installing and testing more new software on the new application license
server.
- Helped with trying to figure out why the dataviewer and dtt data
analysis tools are not working from the GC network.
- Started following cables to determine best way to get GC network back
into the LVEA for commissioning work for the next month.
- Doing more testing trying figure out why the range and signal strength
of the new AP2000 wireless access points is so poor.
- Preparing disk space and computers for the Surf students. Responding
to requests for accounts and additional software for the students.
- Did some more searching of mail logs and configuration trying to help
Greg and Ben determine why their ldas e-mail messages are causing errors
on the mail server.
- The new fiber line between LHO and PNNL has been established. Light
will be shown down the line to determine losses. The job should be
completed this week.
CIT:
(Mike)
-Worked on Seiji Kawamura's laptop. After he finished reloading his
laptop
due to a hard disk failure, I installed additional software and work on
network configuration, security settings and office updates.
-Finished up loading and ghosting GariLynn Billingsley's new laptop and have
given this to her.
-Running a diagnostic on multiple hard disks that were given to me by Al
Wilson I have more drives that need to be shipped out for RMA
replacements.
-Loaded a loaner laptop from scratch; this was turned in from one of our
users. I came across some hardware errors that I fixed from surplus
laptops.
-Ran an additional network cable over in 40 meter. This is setup in the
clean room to give users Internet/Network connectivity, while working
from
this room.
-I cleaned up the ghost backup server by burning ghost images to DVD. I
am
getting ready to update many ghost images that are out of date.
-Worked on Cleveland's workstation trying to resolve a database issue. I
have more work/research on this. (Request by George Stokes)
-Ran security updates on the following user workstations: Irene Baldon,
Millikan conference room M50, 40 Meter: M18-visitor, M3-visitor,
M17-visitor, M25-visitor, Bob Taylor, and Steve Vass.
-Ghosted the following user workstations: Irene Baldon, Cindy Akutagawa
laptop/workstation and GariLynn Billingsley.
-Other misc. onsite/phone user support.
(Lisa)
- Spam
- Working on the new application server
- Looked into a mailman problem for Dennis Coyne
- Looked into an e-mail problem on Albert's laptop
Mail Stats 5/20 - 5/26/04
Messages Accepted:
Spam Rejected:
Viruses Rejected:
False Positives:
Total Mail Thru:
(Veronica)
- LSC website: Posting updates to the June meeting as they arrive.
Working with the MIT ecommerce dept. on backend modifications for our
application.
Working with Marie on last-minute website additions, and providing
information to Keith for his visitor accounts setup.
Updates to the Observational Results webpage and other parts of the LSC
website.
- LIGO website: Updates/upkeep of the PAC meeting website. Updates to the
SURF programs webpages. User support in transfer and posting a
presentation online. Updates to various other pages throughout the
website.
- Project Science: Working on the website for the October workshop.
- CaJAGWR: Website updates and user support.
(Larry)
-Finished up the print-server replacement. It is now on-line. Overall it
is working the way it should. I'm sure there will need to be some
adjustments but they should be minor.
-Started a new server installation for the E2E group. Virginio is going
to do some testing on it for the next few days and then we will work on
the build next week.
-Some assistance on the logistics of the PAC and LSC meetings that are
coming up.
-Purchased a number of supply items and equipment for other groups.
-Some minor work with Lisa on the spam filters.
-A number of account modifications. Disk cleanup and related work.
-Working on a new SDRC license and upgrade.
-Working on the updating of a couple of contracts. One with Caltech and
one with ESnet.
(Bruce Sears)
-Ilog (Electronic Log) Development:
- Ongoing minor works on Ilog
interface.
From: Larry Jones <ljones@ligo.caltech.edu>
Advanced LIGO Seismic Structure
SEI Structure:
Revision A of the E030179 Design Requirements document for the BSC
structure was released on 5/21 and given to ASI. We discussed ASI's responses
to this on 5/25, involving clarification on a few remaining issues. ASI has
slipped the Design Review for the BSC structure by 2 weeks to allow all
significant issues to be included in the review.
The Design Review meeting for the BSC structure is now scheduled for
Actuators:
The wire manufacturer that we'd hoped to use for precleaning the actuator mag
wires prior to winding has backed out of quoting, likely due to the small
amount of wire involved. We're purchasing respooling equipment and will
ultrasonically clean the wire as a batch process in the 40 m lab; the wire and equipment
should arrive this week.
The candidate epoxy potting material outgassing coupons were made and shipped
to LHO for RGA testing.
PSI, the actuator developer, is shipping plated magnets (unmagnetized),
bobbins, mag-iron frame pieces and fasteners to Caltech for precleaning.
Actuator bobbin winding is scheduled to start 14 June.
Displacement Sensors:
Jay has the updated quote from ADE, and is ready to order the BSC SEI sensors.
Seismometers:
Nothing new.
Galling/Dusting Test:
Further progress was made in writing the report.
From: Janeen Romie <romie_j@ligo.caltech.edu>
AdLIGO Suspensions
MC to LASTI in June
Continuing to coordinate with folks on tasks associated with sending the
mode cleaner triple suspension to LASTI in June for installation in a HAM
chamber. Laurent has been updating the assembly specification, while he works
with Helena, Calum, Mark and I. Work is on schedule.
Jay Heefner will install the mode cleaner electronics at LASTI on June 9 &
10. The suspension and it's accompanying hardware should arrive at MIT by June
10th. Mark Barton and Luke Williams from the
I've created a bake oven schedule for Bob Taylor's small and large ovens at the
40m to facilitate the processing of parts that are needed for this assembly and
installation work. Dennis, Larry Jones and, especially, Bob, have signed off on
the schedule. If needed, Bob will receive support from Helena and I in the next
few weeks to help meet this tight schedule. Ken Mason has sent components that
require cleaning and baking for this installation. They have been incorporated
into the schedule.
Last Friday, Doug Cook, Dave Ottaway, Ken Mason and I had a telecon about the
mode cleaner installation/alignment tasks still left to work out. A list of
actions were generated and folks are working on them now. Work is on
schedule.
Working with Dennis, Jay, Dave O. and Laurent on dSPACE system capabilities and
testing requirements at LASTI.
Quad Work
Rich Reisen from LLO sent us a scissors table to use for small range, heavy
load vertical translation. We hope to use it when installing a quad in a BSC.
Initial LIGO
Output Mode Cleaner
Calum and Mark have modeled a double pendulum suspension for the Initial
LIGO output mode cleaner. Peter Fritschel will decide next week if we will go
forward with the mechancal design of this concept.
From: Peter King <pking@ligo.caltech.edu>
From: Helena Armandula <ahelena@ligo.caltech.edu>
Advanced LIGO Coating Development
LMA
The last doped Ta2O5 coating (Formula 2) received from LMA showed improved
"Q" measurements as reported from MIT and Glasgow.
This coating material had about double TiO2 concentration than the first doped
Ta2O5.
Coating absorption and expansion coefficient of the doped material improved as
the dopant concentration increased. Refractive index was also higher, resulting
in thinner layers.
The dopant seems to be uniformly distributed.
Formula 2 coating, compared with un-doped Ta2O5 resulted in ~50% "Q"
improvement.
In coating Formula 3, for the next run, the concentration of TiO2 will increase
to ~50%.
Jean-Marie estimates the maximum TiO2 doping concentration at ~80%. Also
expressed the importance of adding TiO2 to Ta2O5 (and not vice versa) to obtain
a more stable film.
From: Riccardo DeSalvo
<desalvo@ligo.caltech.edu>
Maddalena
I have finished re-building the mechanics to make a more symmetric filter in
order to reduce the noise due to the umbalance
at ~1Hz. I have finished to mount and calibrate the actuator(magnet and coil)
and the movement reading system (LVDT), repairing some defects in the LVDT
coils. In the end of the week I'll be able to start to take some frequency
response measurements with the new system, more symetric and with a more
thermal stabilization due to the thermic isolation box.
Moreover, in order to measure the behavior of the working point position in
function of the temperature, I have to finish the Lab View program to aquire
the temperature and the position changes at high acquisition frequency and
making an average on the data to improve the precision of the measurement.
Barbara
this week we have tested the thermal expansion of the invar rods and we
found a thermal expansion coefficient on the order of 1.7*10^-6 as
expected from the specs. After the testing of the invar we started to
mount the cavity and the suspension system and now I'm ready to start the
calibration of the suspension
blades. Also, we have finally received the the vacuum tanks and in these days
we are building wood protections to cover the flanges of the vacuum pipe and
riggings to transfer the vacuum pipe down the elevator shaft from the
synchrotron to the Wilson sub-basement lab. For themechanics, the only
missing parts are the LVDT and control coils, expected anytime now.
We expect to spend about two weeks intuning and assemblying the mechanics.
Juri
More toiling and calculations, more details next week.
For additional information about this report, contact whitcomb_s@ligo.caltech.edu
