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The LIGO Executive Committee Agenda for Monday March 29, 2004 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items:
no report
Status of LSC/MOU Research Updates
and Program Reports (Petrac)
(LSC / Status of Research Updates through Aug. 2004 and Program Reports
through Feb. 2004)
LIGO Weekly Site Telecon (Lindquist)
There was a site teleconference scheduled for Thursday, March 25, 2004.
The following items were among those discussed:
From: Ed Chargois <chargois_e@ligo.caltech.edu>
>From: Linda Turner - turner@ligo.caltech.edu>
Web pages for the DCC give simple how-to's for document numbering, easy access to the latest on-line documents, and search capabilities for the DCC database. Take a look. . .
ACCOMPLISHMENTS
Out of a total of 138 LSC presentations, 135 have been submitted and
posted, so we are very close to our goal that all presentations be submitted
and posted within one week of the close of the LSC.
>
From: Cleveland Mak <mak_c@ligo.caltech.edu>
ACTIVITY
Continued to focus on processing LSC documents from the meeting last
week.
| 03/25/04 | Packages | Faxes |
| In | 19 | 40 |
| Out | 7 | 29 |
Press here to access the DOCUMENT
CONTROL CENTER WEB PAGE.
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
Nothing significant to report this week.From: Florence Kaufman <fkaufman@ligo.caltech.edu>
From: irena@ligo.caltech.edu (Irena Petrac)
No report (see above for LSC MOU status).
From: Ed Jasnow <jasnow@ligo.caltech.edu>
SUPPORT (Baldon, Lloyd, Tischler)
>Irene Baldon
ADVANCED LIGO (Cost Schedule
Control Systems) T. Frey
From: Thomas Frey <tfrey@ligo.caltech.edu>
Out of the office on Friday the 19th and Monday
the 22nd.
For list of documents that are being used to develop Adv. LIGO Cost and Schedule, see http://www.ligo.caltech.edu/~tfrey/Cost_MTG_082002/
IO - Still need completed WBS dictionary and BOE. Starting to prepare current progress update and EV reports.
LDAS - No action required at this point in time.
INSTALL - No action items pending.
DAQ - No action required at this point in time.
PM - No action required at this point in time.
FAC - No action required at this point in time.
SUP - No action required at this point in time.
LASTI - Preparing the revised progress data collection spreadsheet.
Working with Irena regarding the bounced email addresses reported by use of the LSC mail list(s).
Continue to work with Carol and Florence starting work setting up "crosswalk" between accounting and progress reporting.
Project Web Site for posting schedule and progress related data continues to be updated with the latest and greatest.
Nothing to report.
A LIGO Change Control Board (CCB) meeting has been scheduled for Monday,
March 29, 2004 as part of the normally scheduled Executive Committee meeting.
The following Change Requests are open and will be discussed:
| CR Number | Description | Submitted By | Date |
| CR-040003 Rev B | Sensors & Actuators for the Advanced LIGO Seismic Isolation System (SEI) Prototypes | L. Jones | March 18, 2004 |
| CR-040004 | Budget
to cover New Projectors in Livingston Auditorium
|
P. Lindquist | March 19, 2004 |
| CR-040005 | Sensors & Actuators for the Advanced LIGO Seismic Isolation System (SEI) Prototypes | L. Jones | March 23, 2004 |
From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Summary of Commissioning Activities at LIGO Hanford Observatory (compiled by M. Landry)
Locking resumed on both IFOs as major DAQ upgrades wound down
(for a state of the DAQ address, click here,
and later, here).
The logistics
of realigning and relocking the interferometers were complicated by
a lack
of information in the form of test point channels and dataviewer access
(offline
due DAQ upgrade work). Once locked, closing WFS3 and 4 drove the H2
out of alignment; there may be some sorting out of input alignment
and/or
conflicts with the beam centering work performed recently.
H1 measurements included a WFS1 sensing noise investigation
(and here),
that did not see the expected shot noise in the photodiode, and led
to this fix
of the WFS1 demod board. The 4k ISS board was repaired.
Work continued
on the ISCT4 phase camera. 4k FSS, ISS and PMC baseline measurements
were performed; these prior to the laser swap-out next week (see series
of
Radkins elogs on Wed 24. The installation of new ASC code prompted
work
on the WFS and QPD settings and filters.
Yesterday a large work party cleaned the increasingly dishevelled LVEA.
Commissioning:
After incidents of MC and Reference cavity locks, both the trigger/HV
power box and DEI pulser replaced for MC EO shutter on IOT1 (many). Violin
mode Qs for the X arm test masses were measured (Greg, Yevgeny).
Robert Schofield measured mechanical coupling from various pumps and the
LN2 dewar to LVEA seismometers. WFS alignment and characterization
went on several nights (Gabriela, Stefan) with promising progress in matrix
measurement and phase settings. A 61.2 MHz refl detector installed
(no AA & whitening board, or shutters, yet). Peter King measured
the noise level in our ISS photodetector. During POY phase camera alignment,
Andri noticed that the carrier shape changes ring-like to gaussian when
an offset is added to the PRC servo. Network problems with the phase
camera prevented its use, but later Brian and Valera followed up during
a PRC lock with a series of spiricon captures of the AS port together with
calibrated PRC offsets and NSPOB values. Offsets led to visible beam
size change.
HEPI (Rich Abbott, Joe G)
The HEPI installation is going well. The
X end is now mostly wet, with fluid circulating through all but the actuators
(which await their final leak checks.) The Y end plumbing is in a
similar state of completion, and will be wet soon. Piping work is
now underway in the LVEA. They are past the first Ham chamber and
moving at an impressive rate. We are ahead of schedule so far as
cost is concerned.
The installation of actuators is now underway
in the Y end station. This will continue for at least next week and probably
early into the following week before moving to the LVEA.
As far as the electrical HEPI installation is concerned, here is the
short term schedule:
1. For the remainder of this week, Flavio is working on the hydraulic
pump speed control servo commissioning in the X end station
2. Three out of the five chassis that are required for HEPI are
in the rack at the X end station.
3. Next week, we will be installing the remaining HEPI electronics
in the X end station and finishing the field cable runs to the piers. The
pier electronics will also be here an installed during that time. We will
probably be moving the VME items into their crate next week too.
They are currently running in the mass storage room.
Next week, we expect Pradeep from MIT to install sys-id software and
settle in for a long stay to help us with HEPI. Rich Mittleman will
come soon thereafter in time for actuation tests in the X end.
---
Rusyl, Mike and Joe L are busy preparing for the electronics move in
the X end, to the new RFI-filtered racks, and many other vacuum and electronics
infrastructure projects.
Oddvar:
- drawing for valve drop test manifold at the shop, quote received 3/25
- preparing high-bay area for HEPI housing assembly
- inspecting HEPI boots with shipping damages
- working with Gary and Harry for HEPI assembly training
- preparing for installation has started at the Y-end station
- two new HEPI units completely assembled by 3/35
- working on updating drawings and DCNs in order to get the PDM Server
relocated to Caltech within the next three weeks
Ash:
1) Completed the task of Developing a dual slider control software that
simultaneously outputs to two different mirrors. The software was requested
by Valera, it would help us better control the input beam positioning using
the Pitch and Yaw signals of PZT M1 and M2.
2) Documented the DAQ/RFM network.
Rupal:
HPLF: No Report. Waiting on IPG to complete laser.
Commissioning:
Main laser problems appeared to have died last week after I and a cast
of millions increased the aircooling to the NPRO. This particular
NPRO seems to have a propensity to overheat. Although behavior is being
mitigated by air cooling, it does not resolve what is causing the NPRO
to overheat.
Additionally, a new investigation into FSS misbehavior has started.
Brian O'Reilly reported anomalous reference cavity conditions (lock loss
with no warning). Peter and I have started trying to determine what
is caused this sudden FSS (?) transgression. So far we have few suspects.
Safety:
Helping Rich Riesen re-write site-wide LLO laser safety plan.
The new document will be more easily expandable with a simplified scheme
to add laser systems and hazard areas.
GC weekly 3/19 - 3/25 - Shannon 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.
* I have been looking at some bandwidth statistics and just for information
sake, LDAS uses approximately 89-97% of the bandwidth at LLO depending
on which time period sample you look at.
* looking into which Linux distribution will replace Redhat on GC.
I will have to move on this soon.
* looking into setting up the GC support ticket system we had set up
about a year ago. Unfortunately, it was lost during a server move
and then not set up again. However, I think it is time we start using
it again to handle support requests.
* Made some further firewall changes to accommodate some traffic between
LLO and LSU for Joe Giaime.
* Added the internal network to the DNS server. We are now an
authoritative DNS server for the internal network, which is useless to
the outside world, but it will be useful on site. The DNS names will
look like this: {host}.int.ligo-la.caltech.edu. These will
only resolve if you use our local server. I have made preparations
to add two additional subnets on the PIX for both a management (switches,
wireless access points, etc.) and a DHCP subnet. Having the Cisco
3550 has been a lifesaver for a lot of this work. I will be moving
the windows machines and some other items to the internal subnet as time
permits.
* Will also be setting up a secondary/slave DNS here since we are now
serving an internal domain.
* Ordered a rackmount computer to put in the auditorium. I have
been planning to do this for a long time, but it seems to be necessary
now as people want more and more access to cameras, etc. in there.
This will also be useful in order to adjust mixer levels, etc. on the equipment.
* Received a quote for two rack mount servers for the building controls
software upgrade. I have held off on the purchase until Allen tells
me to order them.
Igor:
LDAS admin:
1) Configuring the cluster for grid applications:
a) node1 is now configured as ldas-grid, node2 as ldas-gridmon;
b) configured nodes to cross mount each other's disks;
c) configured NIS server on ldas-grid and NIS clients
on node3-70.
2) T3 firmware upgrade is in progress and should be finished in couple
hours.
Data analysis:
1) Made two presentations at LSC last week:
a) G040082-00-Z: <http://admdbsrv.ligo.caltech.edu/dcc/docs.htf?sqlStart=1&totalDocs=&docno=G040082-00-Z&category=&dept=&year=&title=&author=&authorID=&authorNM=&contdocno=&keyword=&keywordID=&keywordNM=>
Burst MDC frames
b) G040083-00-Z: <http://admdbsrv.ligo.caltech.edu/dcc/docs.htf?sqlStart=1&totalDocs=&docno=G040083-00-Z&category=&dept=&year=&title=&author=&authorID=&authorNM=&contdocno=&keyword=&keywordID=&keywordNM=>
Waveburst sensitivity study and event property reconstruction on S2 playground
data and MDC frames.
2) Coauthored LSC presentation made by S. Klimenko: G040101-00-Z <http://admdbsrv.ligo.caltech.edu/dcc/docs.htf?sqlStart=1&totalDocs=&docno=G040101-00-Z&category=&dept=&year=&title=&author=&authorID=&authorNM=&contdocno=&keyword=&keywordID=&keywordNM=>:
Wave Burst Analysis of S2 Data.
3) Observed the discrepancy between waveburst sensitivity determined
by simulations on S2 playground and running on MDC frames. The explanation
is: the injections are done too frequently in MDC frames, that leads to
underestimating sensitivity. The way to correct the problem: a) increase
time between injections; b) all injections should be of the same strain
in each MDC frame set so that strong injections would not mask weak injections.
Made a presentation about it on Tuesday's burst telecon: http://www.ligo-la.caltech.edu/~igor/InjectionFrequency
Ken Franzen:
1) Gave a presentation at the LSC meeting last Thursday (March 18).
Find the slides at http://www.ligo-la.caltech.edu/~franzen/ligo.html
2) This week was spent on trying to understand how the Melody code works.
The UF group intends to use Melody for an AdLIGO mode cleaner model.
Rich Abbott
As far as the electrical HEPI installation is concerned,
here is the short term schedule:
1. For the remainder of this week, Flavio is
working on the hydraulic pump speed control servo commissioning in the
X end station
2. Three out of the five chassis that are required
for HEPI are in the rack at the X end station. The remaining two
are my responsibility and are not yet placed in the rack due to me not
having all the paperwork done.
3. Next week, we will be installing the remaining
HEPI electronics in the X end station and finishing the field cable runs
to the piers. The pier electronics will also be here an installed
during that time. We will probably be moving the VME items into their
crate next week too. They are currently running in the mass storage
room.
The piping installation is going well. Work
is underway in the LVEA. They are past the first Ham chamber and
moving at an impressive rate. We are ahead of schedule so far as
cost is concerned.
The installation of actuators is now underway in the
Y end station. This will continue for at least next week and probably
early into the following week before moving to the LVEA.
Ken Mailand
Joe and I filled the x-end station with fluid to the
bypass valves, and has been running at full speed since Wednesday morning,
the pressure at the pump station manifold exit gage reads approx. 50 psi.,
the resistance in the system for this (high) flow rate.
The LLO vertex distribution and collection manifold
layout has been sent to Joe Hanson. This layout indicates location of the
plumbing, valves and the reservoir. Most of the parts to complete
this assembly are at the vendor for quote.
It should take approx 10 days, to complete the parts. The main manifolds construction will be at LLO using the fusion welder.
Ben Abbott
a. The Pier Interface box PCBs had some small problems,
that a few jumpers can easily get around. I have redone and re-submitted
the PCB for a better and jumperless version. Four jumpered boards
will be shipped to Livingston tomorrow.
b. Four of the 8-Channel Valve Driver Boards have
been tested and sent to Livingston with their boxes and panels.
c. Livingston now has all the HEPI Electronics
modules (minus the Pier Interfaces) that it will need to get the X-End
Station going. The remainder will follow shortly.
d. All of the pre-fabricated cables are now
at the site, and are awaiting labelling and installation.
e. I am working on a system schematic for the
entire HEPI system. All of the parts have now been made in Protel,
and the schematic just needs to be layed out. It should be done by
the end of this week.
Jay Heefner reporting
Fiber Optic Timing Signal Link (Sander)
- The second set of PCBs are on order. They should
arrive tomorrow. The first set had logic level translation problems and
were not useable.
- All parts needed are on hand.
- Front Panels should be in by the end of the week.
- In the process of building a test set for testing
the upcoming EO links.
- Testing should be under way by next week's meeting.
Timing System Redesign (Flavio)
- Rolf and Jay went over a block diagram of the existing
system with Flavio and pointed out known problems and required upgrades.
Flavio will translate these into a requirements document and conceptual
design as work on HEPI allows.
Cable Coupling Measurements (Mohana)
- Results of measurements on the sample 3 foot vacuum
cable have been sent to the suspension group. Larry Jones should have full
length cables in hand soon and will give us one when they arrive. We will
then repeat the measurements.
ISS (Flavio)
- Flavio was going to try and improve the loop shape
in the 1-2KHz region, but that work has been put on hold until we can determine
why the current shunt has a sharp cut off in the response about 2KHz.
AI Filter for Low Noise DAC (Mohana)
- Mohana is becoming familiar with simulations using
Protel DXP.
- She should have a single channel prototype design
done by the end of next week.
40 Meter (Jay)
- Trying to determione the cause of the PSL shut down
problems.
HEPI (Ben, Flavio)
- Flavio at LLO this week, Ben at LLO last week.
- Flavio is installing the pump servo.
- Ben is redoing the pier interface board. The original
had layout problems. Prototypes are operational with jumpers, but will
be replaced with new units when they are complete.
- Ben is completing the system schematics.
EMI Upgrade (Jay)
- Jay at LLO 4/5-4/9 for installation of end station
equipment.
- More cables have arrived and will be shipped to
LLO.
- There is a possible problem with the rack feedthrough
panel location that may require us to order longer cables for VME chassis
located in the bottom of the rack.
The ordering of various hardware items for the OMC
is going forward.
For the machined pieces there are a few delays, the
biggest one being with
the vacuum chamber box, although this may have been
resolved by the end of
today. A wire on the PZT was broken at the soldering
junction. Benno will
be sending out another PZT from Hanover. The
spacer for the OMC was
measured to be longer than the dimension called out
in the drawing. There
are a few other dimensional differences between the
actual items and the
drawings too.
OTF Lab. (W. Bridge)
The (21) pieces of the new twisted, shielded, teflon
cables are under test.
We are taking ring down and beat frequency measurements
as well as the RGA of the chamber every day.
Absorption Test Measurement prototype in progress
Noise sensitivity for the following fused silica substrate
samples 1.5" long X 1.0" dia. S/N FE13 , FE09 and IM04.
has been recently completed.Improving
the absorption sensitivity by testing different samples
and improving the optical set up as well as the quality
of the different opticsPLUS detection
sensitivity is
still under progress!
We have received the other sapphire substrate PINK
colorfrom Lyon, France. (314 mm
Dia. X 131mm thick.)
and We have it installed already and alignment is
in progress.
We are going to test this mirror for absorption at
different depths andnoise sensitivity.
The laser enclosure fabrication still in progress.
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
PSL LAB.
The 10 watt ND:YAG laser still in standby.
I have giving NPRO S/N 414 from one of the ring down
set-upsto the 40m. Lab .
They needed it in emergency.
Misc... tasks
The making of pin holes disks of 1,1.5, 2 and 3mm
in dia. has been completed
New orders still been placed for the absorption test
set up for both lasers(He-Ne & ND:YAG)
as we continue improving the sensitivity and detection set-up.
The above plot shows our first measurements
of thermal noise using
sapphire test masses at the TNI. The
observed spectrum agrees well with
that predicted for thermoelastic-damping (Braginsky
noise). Note that
our spot size is sufficiently small that the
measurements are not in the
adiabatic limit, and thus the noise curve
is not given by a simple
power-law.
The formula we used to model Braginsky noise
is that of Cerdonio, et al.
(Phys. Rev. D 63, 082003 (2001)). However,
we discovered two
mathematical errors in Cerdonio's calculations
and corrected them for
our analysis. These errors caused their
formula to give a noise
prediction that was too high, using the known
thermal expansion
coefficient and thermal conductivity for sapphire.
The measured noise
is thus somewhat lower than we had been anticipating,
and it agrees well
with the corrected formula.
We plan to further improve our measurement
and analysis in the coming
weeks.
LASTI Weekly Report (Allen, Mason, McInnes, Mittleman, Ottaway,Ruet)
The LASTI facility has a new website:
http://emvogil-3.mit.edu/~ottaway/Webpage/LASTI_Header.htm
After nearly a year up at air for the HEPI installation and test, we
will
be pumping down next week to check the integrity of the vacuum envelope
in
preparation for the arrival of the mode cleaner triple in June.
We removed the three geophones in the HAM chamber which are not vacuum
compatible. Myron checked all the annulus pumps in preparation for
us to
begin pumping down the LASTI vacuum chambers next week.
BSC HEPI Refit
We removed the springs and opened up the hole in the top plates on the
BSC HEPI system. We were concerned that the spring was rubbing and
causing problems with the spring constant. While apart we added a thrust
bearing to be identical to the LLO installations.
The new hydrualic valves for the BSC have all been leak tested (they
all passed) and installed. See an entery in the LLO log by Rai Weiss
on
3/23/04. The flexible hosing is currently being installed and we hope
to
be pumping fluid through the system by tomorrow.
We have also taken a set of measurements on the position of the
BSC platform as a function of the spring tension, this data set looks
much
better than before the rework.
HEPI LLO Support
An FEA analysis was done on the new HAM lift plate to be used at LLO.
This new lift plate picks up the load of the stack over the HEPI springs.
Pradeep started an extended stay at LLO.
Advanced LIGO Seismic
We began planning for the design of installation fixturing for the
advanced Ligo seismic isolation in the LASTI BSC chamber.
Simulation and Modeling (Bhawal)
Weekly Physics Meeting
-------------------------
Matt, Virginio, Hiro and Biplab discussed about simulation meeting
at Cascina, progress in Virgo, use of simulation there. We also
discussed issues related to new lock acquisition design, Dual recycling
code, Violin modes and FFT code.
Interferometer Simulation meeting at Cascina
---------------------------------------------------
There was a simulation meeting held in Cascina in the week of
March
15th, and Hiro and Matt from LIGO attended it.
3 from GEO and ~10 from Virgo attended the meeting.
The minute of the meeting will be available soon.
The main purpose is to share the knowledge / tool of the interferometer
simulation so that the simulation can be used more efficiently
to help
the GW search using interferometers.
This meeting will be held twice per year in the future.
A new maillist, intsim@ligo.caltech.edu, has been set up.
The intent is this:
"Welcome to the Intsim@ligo.caltech.edu mailing list! Welcome
to the
Interferometer-Simulation mailing list. This purpose of
this list is
to provide a place where issues related to the successful and
efficient use of simulations for interferometer gravitational
wave
detectors can be discussed. This list is intended to foster
collaboration that is not limited by the boundaries of groups
or
nations."
In addition to exchanging information among simulation developers,
messages like "can this be done / explained by simulation" are
welcome.
Dual Recycling Michelson Cavity
------------------------------------
(Hiro) The first round debug of the matlab code is completed.
The document (Mathematica note deriving formulas with full text
and
comments), matlab code and e2e box files for debugging will be
posted
in the e2e home page. The e2e primitive will be created soon
after
that.
The first one will be scalar field only.
At the Cascina meeting, there was a discussion about the collaboration
of the developing and validating the dual recycling code.
After the meeting, there were a few mails exchanged between Patrice
Hello / LAL / Orsay, Andrea Vicere / Virgo and me about this
issue.
LAL group, mainly Monica Varvella, will start working using e2e
and my
matlab code.
Injection of accelerometer signals to SimLIGO
------------------------------------------------
(Biplab, Virginio) Our aim is to investigate the lock loss events
by injecting accelerometer signals recorded around such events
to
SimLIGO
and analyzing the output. As a first study, we injected accelerometer
signals from S1 LLO locked-strech data to SimLIGO mirror locations.
Like actual interferometer, SimLIGO also did not go out of lock.
We looked at the outputs and are sorting out a few issues to
have good
idea about the locked stretch before we start studying the lock-loss
cases.
Phasemap
-----------------------
(Biplab) Wrote necessary Matlab code to generate phasemaps from FFT.
Code for FFT-way of simulating telescope is now added to it so
that we
can get more accurate results for far fields. Comparison with
Modal
model
telescope was made under various heated conditions. Some of the
details
and oddities are being investigated.
Mechanical Simulation
-------------------------
(Virginio)
A state space representation for the longitudinal mode with violin
modes
(upto the 5th order) is now available at the following location:
http://www.ligo.caltech.edu/~vsanni/e2e/LIGOSusViolin/
The program matlab SusViolinAllTF.m plots all the possible transfer
function
of the model.
This URL instead contains a state space model for the LIGO suspension
without the Violin modes
http://www.ligo.caltech.edu/~vsanni/e2e/LIGOSus
The matlab program SuspesionTF.m plots the interesting transfer
function
Anyway, e2e now provides a module to integrate the LTI state
representation
in the simulation.
Code development and maintenance
----------------------------------
(Melody) Modeler:
Worked on some issues regarding building and running E2E in a
64 bit Linux system.
Alfi
-----------
(Melody) Working on using the client system's default editor to edit
the primitive settings.
LIGO Data Analysis System
Software Systems (Blackburn)
All of the open problem reports associated with the new threaded
diskCacheAPI
have been closed out as of this week. There is a minor problem report
open to
fix an issue in the resource file for the diskCacheAPI that should
be
fixed in
a day or two.
The suite of system level tests were performed early this week. No
surprises
associated with the current development code. Additional tests were
carried
out on a tandem LDAS system to evaluate the dependencies of the memory
leak
seen in the dataConditionAPI on the types of search codes being run.
Results
will be distributed later this week. Testing of the new support for
frame
file checksum validation in the createRDS script was carried out at
Hanford
this week. A few minor suggestions were generated but no issues with
using
the checksum were identified. The performance of the createRDS command
is
reduced with the checksum validation enabled, but LDAS was still able
to
create RDS frames at better than realtime.
The frameAPI now allows checksumming to be enabled/disabled at the user
command level. In the LDAS 1.0.0 release, the checksum was
enabled/disabled
at the system level by a resource variable that only a system
administrator
could access.
Several minor fixes to the dataCondtionAPI, mpiAPI, controlMonitorAPI,
and
managerAPI along with fixes to system level test scripts were made
this
week.
The controlMonitorAPI's Client now has support for customization of
the
SQL statement used to plot results stored in the LDAS database. This
allows
users to filter out particular values or domains of the data stored
in
the
database prior to plotting. Previously, the plots contained all data
between
user specified time ranges.
A demo program (test_gass_copy.tcl) was reworked to send and then
retrieve
files from a grid ftp server using calls into the Globus API.
Work continued on providing a dataConditionAPI shared object library
that
could be used in non-LDAS environments. The focus this week was on
getting
the nightly builds of LDAS to produce the completely self contained
tarball
for this new library.
Continued to work on the complex thread model for TCL in support of
the
common PyGlobus - TclGlobus project.
Began posting the LDAS Project webpage under the DASWG website after
finally
gaining edit priviledges to the DASWG CVS repository system. This is
a
nice
setup that automatically posts changes to the HTML documents as soon
as
they
are posted into CVS. The LDAS Project page is under construction and
will
probably reach maturity early next week.
Hardware Systems (Anderson)
Caltech
-------
(Dan Kozak)
* Continued HPSS migration. At this point, I'm confirming that
data is
on tape in SAM-QFS and then deleting it from HPSS. I'm
finding
pockets
of data that didn't get copied earlier and transferring that
as well.
* Fixed broken archiving at CIT--archiverd got stuck, but once restarted
it's been working fine.
* Some files were not being archived at LLO--repeated restarts of the
archiver finally got them all on tape, but the reason they didn't
get
archived in the first place is somewhat of a mystery.
May have
something
to do with rsync modifying mtimes...
* Did prep work for LLO T3 upgrades (the above included) and am doing
the
firmware upgrades as we speak.
(Hari Pulapaka)
* Installed LSC data grid server on ldas-pcdev2.
* Modified the ganglia setup to show the sites also. Also working on
ganglia to add user defined metrics.
* Helping Ben with the installation of VDT.
* Helping Igor with the grid setup.
* Tried to install LSC data find server but looks like there are some
comptaibility issues with RH 9.0, working with Scott and Kevin
on
that.
(Al Wilson)
* Troubleshooting ldas-pcdev1.
* Sending ASA 1ru system to them to be repaired.
* Added more memory to grid-mon.
* More fine tuning to BB for non-error msg.
(Stuart Anderson)
* Worked with Foundry to replace the entire 15-slot Ethernet switch
at Caltech today to solve an intermittent switch lock-up problem.
* Digging up 3 years worth of paper work to renew and consolidate
Sun maintenance contracts for all LDAS sites.
MIT
---
(Keith Bayer)
* Working on condor upgrade.
* Brought E450 up as 'DMT' machine for small subset of users
connecting from gc.
Livingston
----------
(Igor Yakushin)
* Configuring the cluster for grid applications:
a) node1 is now configured as ldas-grid, node2 as
ldas-gridmon;
b) configured nodes to cross mount each other's
disks;
c) configured NIS server on ldas-grid and NIS clients
on node3-70.
* T3 firmware upgrade is in progress and should be finished in couple
hours.
Hanford
-------
(Greg Mendell)
* I have started at LHO the post S3 generation of level 1, 2, and 3
RDS
frames for a 1000 seconds of data every 100,000 seconds, starting
from
GPS time 763011008 at LHO. This is in conjunction with
archiving of
the
same data. The same will be done or is being done at LLO.
Further
tests of the process with LDAS 1.0.0 were conducted. The
system
continues to be very robust, with minor bugs noted and reported
on.
Keeping this system running will also allow easy archiving and
reducing
of data from external triggers when an IFO was in an appropriate
state
during the time between S3 and S4.
(Ben Johnson)
* Reinstalled Solaris MU4, SAN 4.2, and QFS on fb1. fb1 is now writing
data to /frames.
* Assisted Dave Barker in restoring the DMT and raw minute trend data
from the tape archive.
* Condor has been installed on the LHO Cluster, and has successfully
run a test submission (300 "hello world" jobs).
* VDT has been installed on ldas-grid, working with Hari to get the
GSI
ssh to work properly.
* March 25, 2004 (today) restarted the trend and "one percent"
archiving scripts. DMT archiving will have to wait as the DMT
filesystem
has been moved off of /frames to a D1000.
Data Analysis Activities (Lazzarini)
Mendell:
Mike Landry and I reported a preliminary estimated UL from the
StackSlide search. This week we are focused on a more detailed
comparison of our work with the Hough code and further validation.
We
will then focus on Monte Carlo simulations to make the ULs final.
This
will take the next few months to complete.
Shawhan:
* Worked on paper for GWDAW-8 proceedings, about vetoes for LIGO
inspiral
analyses. Currently working on a second paper, about inspiral
waveform
consistency tests beyond the standard chi-squared test.
* Did bookkeeping checks on S2 inspiral events. Discovered a
serious
flaw
in the LAL frame-reading code which caused some of the inspiral analysis
jobs to process a slightly wrong interval of data.
* Went over the details of the inspiral analysis with Bill Kells.
* Posted descriptions of S3 hardware injection waveforms at
http://blue.ligo-wa.caltech.edu/scirun/S3/HardwareInjection/ .
Sutton:
Since getting back form the LSC meeting I've been instigating a
Bursts Group email roundtable on coordinated simulations for the
S2 analysis. This is essential for both the low-frequency and
LIGO-TAMA high-frequency analyses. I'm also preparing a talk
on the status of LIGO for the Pacific Coast Gravity Meeting
being held here at Caltech tomorrow and Saturday.
Yakushin:
1) Made two presentations at LSC last week:
a) G040082-00-Z:
<http://admdbsrv.ligo.caltech.edu/dcc/docs.htf? sqlStart=1&totalDocs=&docno=G040082-00-
Z&category=&dept=&year=&title=&author=&authorID=&authorNM=&contdocno=&ke
yword=&keywordID=&keywordNM=> Burst MDC frames
b) G040083-00-Z:
<http://admdbsrv.ligo.caltech.edu/dcc/docs.htf? sqlStart=1&totalDocs=&docno=G040083-00-
Z&category=&dept=&year=&title=&author=&authorID=&authorNM=&contdocno=&ke
yword=&keywordID=&keywordNM=> Waveburst sensitivity
study and event
property reconstruction on S2 playground data and MDC frames.
2) Coauthored LSC presentation made by S. Klimenko: G040101-00-Z
<http://admdbsrv.ligo.caltech.edu/dcc/docs.htf? sqlStart=1&totalDocs=&docno=G040101-00-
Z&category=&dept=&year=&title=&author=&authorID=&authorNM=&contdocno=&ke
yword=&keywordID=&keywordNM=>: Wave Burst Analysis of S2
Data.
3) Observed the discrepancy between waveburst sensitivity determined
by
simulations on S2 playground and running on MDC frames. The explanation
is: the injections are done too frequently in MDC frames, that leads
to
underestimating sensitivity. The way to correct the problem: a)
increase time between injections; b) all injections should be of the
same strain in each MDC frame set so that strong injections would not
mask weak injections. Made a presentation about it on Tuesday's burst
telecon: http://www.ligo-la.caltech.edu/~igor/InjectionFrequency
Lazzarini:
*Working through with PeterF, Joe Romano and Tania the intercomparisons
among several different
analyses of the S2 data. Trying to sort out differences among early,
very preliminary results by Kaice Reilly
and current results being generated at Cardiff. Likely differences
due
to insufficient tracking of parameters
used: upper/lower frequency limits; notching of known lines; windowing
algorithms have changed; V02 vs. V03 calibrations
being used. A valuable lesson, I think...
*In addition, our H1+H2 optimally combined paper has been posted to
gr-qc (http://arXiv.org/abs/gr-qc/0403093) and also submitted to PRD.
*Finally, Rai and I have been discussing ramping up to perform a
targeted stochastic search.
General Computing (Wallace)
MIT:
(Keith)
-After more troubleshooting, got RMA# and sent IDE/SCSI
raid unit back to manufacturer
-Ordered desktop for postdoc
-Ordered replacement printer for NW17
-Testing new SCSI drives & cards on backup system
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.
-I have been looking at some bandwidth statistics and just for
information sake, LDAS uses approximately 89-97% of the bandwidth at
LLO depending on which time period sample you look at.
-Looking into which Linux distribution will replace Redhat on GC.
I
will have to move on this soon.
-Looking into setting up the GC support ticket system we had set up
about a year ago. Unfortunately, it was lost during a server
move and
then not set up again. However, I think it is time we start using
it
again to handle support requests.
-Made some further firewall changes to accommodate some traffic
between LLO and LSU for Joe Giaime.
-Added the internal network to the DNS server. We are now an
authoritative DNS server for the internal network, which is useless
to
the outside world, but it will be useful on site. The DNS names
will
look like this: {host}.int.ligo-la.caltech.edu. These will
only
resolve if you use our local server. I have made preparations
to add
two additional subnets on the PIX for both a management (switches,
wireless access points, etc.) and a DHCP subnet. Having the Cisco
3550
has been a lifesaver for a lot of this work. I will be moving
the
windows machines and some other items to the internal subnet as time
permits.
-Will also be setting up a secondary/slave DNS here since we are now
serving an internal domain.
-Ordered a rackmount computer to put in the auditorium. I have
been
planning to do this for a long time, but it seems to be necessary now
as people want more and more access to cameras, etc. in there.
This
will also be useful in order to adjust mixer levels, etc. on the
equipment.
-Received a quote for two rack mount servers for the building controls
software upgrade. I have held off on the purchase until Allen
tells me
to order them.
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
- Continued setup and software installation for the new license server.
- Worked with Larry concerning a request from ESnet to change our
network connection from OC3 ATM to fast ethernet. Looks now that
ESnet
may be willing to give us a gigabit ethernet connection instead of
the
fast ethernet. We are continuing to explore what this will require.
- Misc. user support.
CIT:
(Mike)
-Sent out 5 dead hard drives that are still under warrantee. I contacted
the manufactures and setup RMA's for all drives. Ed Chargois took care
of
the shipping arraignments for me.
-Updated ghost images on the following user workstations: Irene Baldon,
Dorothy Lloyd, Florence Kaufman, Gina Salone, Donna Tomlinson, DCC
nightly
backup pc.
-The media server (m91) was coming up with system errors (c: drive
is
running out of disk space.) After talking to Larry we decided to make
some
hardware changes to accommodate current media and allow future growth
by
adding a bigger hard disk. I installed 250 gig hard disk and upgraded
the
memory on this server. I copied media data to new hard disk and
re-configured mount points of Real-Media Server to new drive.
-Veronica Kondrashov, I added an additional 120 gig hard disk to her
workstation for media storage purposes.
-I worked on the 3rd floor printer of W/B, by changing out drum kit,
transfer kit and toner cartridges. I also swapped out the rollers,
filter's
and cleaned up and blew out the insides of this unit.
-I burned ghost images of our NTSRV's to DVD.
-This week I had quite a bit of onsite/phone user support; that included
software, networking and printing issues.
(Lisa)
- Spent most of the week setting up test cases and evaluating the
problems I was
having with mailman on the new mailserver. I believe that I have
these
resolved
and will be putting the new server in place on Sunday night.
- Worked on a couple of problems with the mailman server. I think
some
of these
problems will go away once the new mailserver is in place. The
mailman
mailing
lists are getting a lot more traffic now than they were a year ago.
I
think the
hardware is having trouble keeping up.
- Worked on a number of smaller user issues, mostly with using sftp/scp
to move
data around, but also some shell problems and an issue one user had
with a
backup tape.
(Veronica)
- LIGO website: Updated the Internal Bulletin Board Travel section
with
new links for 2004. Updates to SURF'04 projects page. Updates to the
LIGO
seminars pages.
Helped Donna to write and install a redirect page for the old GWIC
link
that used to run from her home directory.
Data upkeep in helping Mike in his work on streaming media server.
- LSC website: Adding last presentations from the March meeting. Looking
into the setup of the database of meeting talks on how to implement
session breakdown on the webpage of closed talks.
Adding MOUs.
- CaJAGWR website: User support and website updates.
(Larry)
-It has been a busy week with different network issues. LSU is having
a
number
of problems with their network which has been affecting the performance
in that
area but they are working hard to get the problems resolved.
ESnet is changing out its hardware at PNNL. This will affect our
connection and
we will have a few hoops to jump through no matter which option (GigE
or FE
connection) we have to follow when the hardware change is done. If
all
goes well
the change out will be a plus for us. If not, we won't see much of
a
hit on
performance but there won't be any room for expansion. I will continue
to assist
Christine on this issue.
There were a number of problems between the .edu and the .com networks,
nationwide, last week. We did notice some connectivity problems but
since it
took place late in the evening we did not have too many complaints.
-Worked on a couple of printer issues. We have a printer that will
need
to be
replaced. I have worked on repairing the unit but too many parts are
just worn
out.
-Worked on a couple more items for the computer room expansion. The
shop is now
checking on the power. We probably won't get what we asked for but
we
should get
enough to cover us for the next year. The air-conditioning issue will
be on hold
until the building air has been reworked.
-Made a number of purchases for GC and other groups. The equipment
that
has
arrived has been distributed and so far no major issues with any of
the
orders.
-Assisted the E2E group out with a number of problems. The major one
being the
sensitivity of the servers with regards to NFS mounts. We will be
changing the
configuration by adding a application server and removing some of the
dependency
on NFS mounts that all of the machines have. We have already removed
the cross
mounts which has helped out a little.
-Assisting Lisa and Mike with a few the projects they have been working
on.
-Assisted a number of people with different web issues.
-Regular user assistance and some additional cleaning of accounts.
Advanced LIGO Seismic Structure – 25 March
SEI Structure Design/Fab contract:
ASI is applying fewer hours than expected. A re-plan is in work, being shifted by recent developments.
It appears that we've finally gotten beyond the impasse of the BSC structure optical table stiffness issue. We met with ASI two weeks ago and decided that ASI should re-run the FEA cases for the 9 specific payload layouts, with only the quads as components. Other payload components would be run with their masses distributed over the table. The results were impressive. With the first run, only one of the layouts did not meet the 165 Hz minimum resonance requirement. Some structural modifications were made, and now the structure complies for all of the layouts.
On a related issue, ASI has looked into the effects of relaxing the CG location tolerance for Stage 1, to see if the optical table's cutouts for clearance of Stage 1 ballast could be reduced. This does not look promising, but thankfully will not be needed.
The result of passing the optical table stiffness requirement with no
discrete payload components other than the quad means that non-quad payload
components must bear the liability of their effects on BSC optical table
stiffness. Basically, their problem lies in the height of their CG and
in their small footprint. ASI is assisting LIGO in payload design as follows:
We will review the impact this can have on our payload mass, and decide
whether we want to increase our payload mass limits to accommodate this.
We will be meeting with ASI on Monday, 29 March, to discuss their replan
and costing issues. The Design Review meeting for the BSC structure is
now scheduled for
Actuator Testing and Redesign:
The due date for actuator development proposers was shifted from 3/15 to 3/19 due to the unavailability of proposal evaluators this week, with the LSC meeting and the SUS summit. We received the proposals on the 19th, evaluated them and submitted a report to the LIGO Source Selection Official. A Change Request has been submitted to the Change Board for adding this to our AdLIGO budget.
RGA re-scans of the rewound small actuator coil at higher temperatures,
with more precision procedures, have been completed, as well as empty oven
measurements. The Cycom 3001 appears to
meet the proposed allocated AdLIGOoutgassing
level of T040001, corrected for a factor of 2 problem.
Position Sensor Probe Development:
RGA re-scans of position sensor epoxy coupons with more precision procedures
were completed. Both the epoxies and the cables for the position sensor
are close enough to the proposed allocated AdLIGOoutgassing
levels of T040001, corrected for a factor of 2 problem,
that procurement can be made. A Change Request has been submitted to the
Change Board for adding this to our AdLIGO
budget.
Seismometer Procurement:
This task is on hold pending management approval for SEI structure prototype
fabrication.
Galling/Dusting Test:
All testing is now complete. Data evaluation is in process.
From: JaneenRomieromie_j@ligo.caltech.edu
25 March update
AdLIGO Suspensions
Participated in the LSC last week. Co-hosted
a very successful Suspensions Summit after the LSC. Summaries of
discussions from the
Bill Grady from the Carpenter's Shop has completed the wooden quad structure. I'm going to ask him to make it in two pieces so as to mimic the real structure.
Working with
The Ta2O5 monolayer showed some fine cracks after annealing. Also 1"dia. test samples were coated, in the same runs, for further characterization of the respective materials.
A thin substrate was coated with 30 layers of HfO2/SiO2. The coating showed some small bubbles after baking. The structure of sputtered HfO2 is not completely amorphous; its also crystaline, hence there was an increase in scatter.
The HfO2 will be repeated at a later time.
Next, we want to get the sapphire substrates coated with doped Ta2O5 and have them characterized by the " TM Material downselect" date.
From: "Erika D'Ambrosio"
<ambrosio@ligo.caltech.edu>
I made a few calculations and simulations
to find a good compromise between the
intrinsic technical limitations for the
fabrication of a mexican
hat mirror and
the scientific goals of our project.
The minimal requirements I set are feasible
and probably the "optimal ones" too. This is
an iterative process in collaboration with our
collegues at LMA in
Alban Remilleux, who sent us a list
of
substrates he needs for the calibration of
the print of the mask. Phil is taking care of
ordering the spherical mirror we will use for
our preliminary tests of the prototype.
From: Peter King <pking@ligo.caltech.edu>
LLO
===
The dark noise for the intensity stabilisationphotodetectors
was
measured. From the front panel LEMO connector on the photodetector
interface box, the dark noise was measured to be approximately
13-15 nV/Sqrt[Hz]
from about 100 Hz to 30 kHz.
Helped out with some minor laser issues relating to
overheating and the
interlock.
OMC
===
The ordering of various hardware items for
the OMC is going forward.
For the machined pieces there are a few delays, the biggest one being
with
the vacuum chamber box, although this may have been resolved by the
end of
today. A wire on the PZT was broken at the soldering junction. Benno
will
be sending out another PZT from
measured to be longer than the dimension called out in the drawing.
There
are a few other dimensional differences between the actual items and
the
drawings too.
AdvLIGO PSL
===========
At the cost and scheduling session of the
Advanced LIGO Laser LSC
session, we discussed the overall schedule and what is expected in
particular tasks. A cost division between LIGO Lab and AEI was
made to
provide some ballpark figures and bottom line costs.
The good news is that LZH have achieved 213 W
with an M-squared of 1.15
(as I recall). The demonstration target
of 200 W has been reached. So far
the initial performance figures of the laser
look good and the chances of
improving the beam quality are high.
For additional information about this report, contact sanders@ligo.caltech.edu