The LIGO Executive Committee for January 17, 2005 is cancelled because of the Caltech Holiday.
no report
STATUS
OF LSC MOUs (Petrac)
(Weekly update on the status of
LSC MOUs and Research Plans and Progress Reports)
Cal State Univ. of Dominguez Hills
GEO 600
Attach. A and Z, and Progress Report / PI
reminded of outstanding inputs / Allen and
EGO
Shanghai Institute of
Optics and Fine Mechanics (SIOM)
VIRGO
Other
MOUs, and Attach. A, B, C, D and Z updates and Progress
Reports that have been processed to date are being consolidated with the record
of web postings / Petrac and Turner
LSC driven process for evaluation of bi-annual research proposals/research
updates was definitized. Proposal Review Committee is
being constituted for the coming round of research updates through August 2005.
A call for the next LSC period inputs went out (to PIs) along with a summary of
the new evaluation approach for the proposed research updates that is being set
up. The due date is February 10th
A web based access for distribution of LSC
documentation (to the Proposal Review Committee) is being set up. The
documentation will include research updates in Attach. A through D, group
coordinates in Attach. Z, and Progress Reports.
SITE
TELECONFERENCE (Lindquist)
A brief site teleconference was
held on Thursday, January 13.
PROPERTY
MANAGEMENT (Chargois)
>From: Ed Chargois
<chargois_e@ligo.caltech.edu>
>From: Linda Turner -
turner@ligo.caltech.edu>
>From: Cleveland Mak <mak_c@ligo.caltech.edu>
COST
SCHEDULE CONTROL SYSTEMS (Cunningham, Brambila,
Kaufman, Salone)
>From: Esther Cunningham
<esther@ligo.caltech.edu>
>From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
>From: Gina Salone <gsalone@ligo.caltech.edu>
>From: Florence Kaufman
<fkaufman@ligo.caltech.edu>
SUBCONTRACTS
MANAGEMENT (Petrac, Jasnow)
>From:
irena@ligo.caltech.edu (Irena Petrac)
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
SUPPORT
(Baldon, Kammerling, Lloyd)
>Irene Baldon
>Dorothy Lloyd
PROPOSALS
and REPORTS (Lindquist)
Nothing new to report. Did meet with D. Shoemaker and L. Turner to prepare a proposal for
a DCC Steering Committee. The purpose of the committee will be to
prepare a recommendation as to how the
CHANGE
CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
HUMAN
RESOURCES (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Quality/Safety
(
>From: Bill Tyler
<tyler@ligo.caltech.edu>
The safety audits of LIGO Caltech labs is now almost
completed. At this time only the LIGO OTF lab "complex" remains to be
audited during the week of 24 January. An audit report "draft"
(without the unaudited OTF) will be distributed
during the next week for comments/revisions.
Summary of Commissioning Activities at
LIGO
Some commisioning highlights from the past week are
bulleted below:
4K IFO
2K IFO
Outreach (D. Ingram)
We have mounted slides of the talks by
Fred R., Greg M., and Mike L. from our January 8 Einstein@Home
event.
Our next WYP
event will be a showing of the film "Runaway
Universe" on February 5.
L1 Commissioning (
---------------------------------------------------------------------
Interferometer Commissioning
Report
The ifo
was locked in the low noise state after much
work on electronics. The best inspiral range achieved
this week was around 2.5Mpc. The oscillator phase noise investigation continued
this week. The Mode Cleaner length and sideband modulation frequency were
changed to minimize the coupling of the phase noise to the ifo output. The beam centering servo was added to the
angular control system. While commissioning the beam centering servo it was
found that the phase noise coupling changes by a
factor of 2-3 depending on the beam position on the beam splitter. The WFS
sensing matrix and noise were measured. The WFS are limited by dark noise above
~30Hz.
The list of
electronics problems:
- ITMX optical laser was
producing a lot of noise and was replaced and also put on the bench power
supply. The attempt to put it back on rack power supply was not successful and oplev is back on the bench power supply.
- the
ETM coil drivers were oscillating at 3MHz. The driver were taken out and
modified to tame the oscillations. The coil driver noise and transfer functions were measured after they were returned to the
end stations.
- the
MC1 mirror continues to change the alignment for a few minutes with a period
about once a day. Replacing the electronics chain for the mirror bias did not
eliminate the problem .
- intermittent
connections were (re)identified in the optics damping and LSC PD(ASPD5)
electronics chains
---------------------------------------------------------------------
Conducted Tour for Friendship
Force of BR
Started collating summer SURF
projects
Safety and Security (Riesen)
---------------------------------------------------------------------
1) Found no site safety
concerns during weekly tour.
2) The routine IR scan
of all IO tables found no errant beams.
3) The laser safety
upgrades for the end stations is now complete and fully functional. The
laser safety sop will be revised to incorporate the changes. The end
stations will remain in the laser hazard condition as before until the laser
safety sop is completed and signed off by upper management.
L1 and AdL
Mechanical Engineering (Spjeld)
---------------------------------------------------------------------
Oddvar Spjeld
- Updated Quad Suspension
Installation Tooling Design.
- New, stiffer GS13 HAM
Platforms designed for X- and Y- direction.
- SEI Review Meeting on
Thursday 1/13.
- Calibration of new servo
valves.
- Preparation for meeting at
ASI next week; review of requirement documents,
drawings and models.
In progress:
- Revise design of HAM
Removal Tool; lighter fixture required.
- Revise design of Quad
Installation Tooling; re-design lift table.
- Photon Calibrator Shelf
Drawings and BOM.
- HEPI Valve Status Database
& Website.
- Analysis of latest servo
valve failure.
- Follow-up of HEPI
hydraulics fluid test results; improved filtering?
General Computing (Roddy)
---------------------------------------------------------------------
This week I have done some
testing of the network connection between LLO and LSU. Using a shell
account on a machine located on campus I was able to confirm that there is a
bottleneck at our connection to campus. Monday I spent the afternoon on campus
with Boyd and did some further testing. Testing between a couple of other
machines on campus showed expected speeds ruling out the router on campus and
confirming that it was probably our router. Tuesday and Wednesday I put
together a Linux router to put in line replacing our current router to test
with. With moderate hardware and no firewall rules I was able to
significantly improve the performance of the connection. The next test
will be with the firewall rules duplicated to see to what degree it degrades
the performance. Whether or not we replace the current router with a
Linux router or not something needs to be done. The bandwidth spike
visible at
http://kahuna.net.lsu.edu/mrtg/corerouters/ligo-liv.html
shows the test I performed last night. It shows a
peak at about 2:00 am this morning.
Working with Solsoft on a couple of support issues and also working on
getting a temporary license to test with Linux.
Working on
a couple of Matlab licensing issues.
High Power Laser Facility,
Optics Modeling and L1 Commissioning (Franzen)
---------------------------------------------------------------------
1) Rupal
Amin and myself prepared and
started a new long term RTP crystal high power endurance test. A few more
pick-off points were added to the beam line in order to study more in detail
the previously observed power loss when the IPG laser is run continuously for
several days. The ramping up of the power went well and the crystal was
initially being exposed to more than 90 W. After a few days running, the power
delivered by the laser has decreased by 5%. We will continue to keep a close
eye on the development.
2) I have started to write up
a short LIGO note documenting the results of the Melody AdvLIGO
MC model.
LDAS/Condor Sysadmin and Burst Analysis (Yakushin)
---------------------------------------------------------------------
Condor/LDAS:
1) With the help from Excel,
the new T3s are physically installed into racks, fiber cables connect T3s to
the switch, UPSes are
installed. The new blade with 8 ports is installed into the fiber channel
switch. What remains now is to configure T3s and include them into our file
system.
2) SysKonnect
card is configured and working fine on gateway.
3) Running badblocks tests on second harddrives
in the nodes.
4) Working to restore 1% data
flow to CIT.
5) Replaced 3 failed disks in datagateway2 and 2 failed
disks in datagateway. No data was lost.
see also the CDS weekly meeting minutes in the commissioning archives:
no report
no report
John
Zweizig
This
week I started getting the DMT hardware and software ready for the
PeterKing
I
stuffed another intensity stabilisation servo board.
A number of problems exist with my new high voltage amplifier. The
Ken
Mailand
After
Phil Willems checked the results of the fluid
corrosion tests he wants the TCS chiller fluid to be the DEX mixture, and also
the running LHO chiller fluid changed out to the DEX mixture. The mix ratio is
1 part DEX to 5 parts distilled water, this matches
the viscosity of the existing working fluid, and is the ratio in the flask
corrosion tests.
Lee
Cardenas, Liyuan Zhang
OTF
Lab. (W. Bridge)
This chamber has two samples, white Ceramabond,
and disks of TRA-BOND #2254
color light brown epoxy. Cavity still locked.
Taking measurements on and off just to keep on track how "clean" is
the cavity.
Waiting on new samples to come in.
Absorption Test Measurement prototype in standby
Scatterometer system in
progress
The Inner test mass 2ITM04 fused silica mirror is in the scatterometer enclosure.
The integrated scanning sphere to detect all the
scattering beam from
the mirror surface has been installed and left there for future reference.
The fabrication of a mount to hold END TEST MASS BLANK
(40 meter) of ~ 4.92" in dia. by 53mm in
thickness is in progress
The Quantronix 60 watt laser has been recovered.
Alignment for the absorption test measurements, setting new optics
and optical train set-up is in progress.
OTF Lab at Lauritsen ROOM 38
Cavity #3
The contamination test for (6) new disks of VAC SEAL Epoxy samples
is in progress. Cavity is locked and we are taking measurements for absorption
and ring down for contamination loss every day.
No change in measurements, good indication that the samples are
"clean"
Cavity #2 in standby
no report
LASTI Weekly Report (Allen, LaLiberty,Mason, McInnes, Mittleman, Ottaway, Ruet)
BSC Seismic Preparation
An assembly document
E040507-A, a cost study, and a project schedule was created for the advanced
LIGO seismic prototype for LASTI.
The dome platform arrived and
was set up between the BSC chamber and the y-mid HAM chamber. This platform
will hold the upper dome of the BSC chamber during seismic and quad
installations to give us the floor space we need for assembly.
Electronics
Jon Allen is designing a low
noise detector PCB for Nergis, and is awaiting files
from Caltech before commencing. The network foiled Jon's efforts to verify PSL
wiring, so nothing has happened on that front for a while.
HEPI Support and
Re-Installation of Valves at MIT
We received 8 hydraulic
valves from LLO and have begun recommissioning the
BSC. The valves have been installed and the actuators are currently in
bleed mode, when neither of the HAMs are running.
Rich have been working on a
method to reduce the in-loop inertial sensor tilt-coupling, which involves
geophone sensor correction, which seems to be working pretty well, allowing us
to reduce the blend frequency by a factor of 2-3. There are some entries in the
LASTI ilog over the last 2 weeks giving some details.
MC Controls Prototype Testing
The first complete reliable
system ID of the triple pendulum was made the last week of November. The sys-ID
enabled us to identify 5 problems, 4 are related to the triple and 1 to HEPI :
1)roll0 to roll TF
Examining the data and the
models, we have been able to detect a mistake in the roll0 (pendulum attachment
point) to roll TF, This problem seems to be linked to an error in the B matrix
where a term is not logical. The TF given by the model shows a DC value above
1, which is not logical with the configuration of the pendulum (the value has
to be between 0 and 1 (0 would be the value if the 2 upper wires were attached
to the same point). Mark's model seems to be correct,
This problem should be fixed easily by comparing both models.
2)Frame resonance
On the first sys-ID, we could
see a frame resonance at 37 Hz, this value is too low in comparison with the
expectations and it has been suggested to add some clamps to attach the frame
to the optical table strongly. These clamps didn't change the first frequency a
lot (41 Hz) but by taking the sys-ID in higher frequencies, I noticed that many
resonances (41,51,85) occur. These values are going to
be confirmed by new acquisition next week, but it seems to show that the low
ones (41,51) could be in fact the osem's
bracket resonances. I'll confirm that with other data soon
3)Pitch to Pitch TF
the mass1-pitch to mass1-pitch TF of the pendulum doesn't
match the model, the resonance frequencies are about 10-20% higher than the
model. It has been suggested that one or many of the model's parameters could
be wrong, so we measured the important parameters on the pendulum to compare
with our model's parameters, every parameter we measured matched the model
perfectly, so this is more and more unlikely that the problem comes from the
model's parameters (but still possible). The other idea was that an asymmetry
could generate such a difference, the asymmetry could have been due to the
pitch adjuster mass that was really off, to check the hypothesis, we placed the
pitch adjuster back to the center and used the upper wire adjuster to correct
the DC pitch. The TF showed no noticeable difference. This issue is still
unsolved.
4)Noise in TF
we noticed that the TF showed some noise at about 10 Hz,
the coherence also drop to 0 for some TF at this frequency, after some
experiments, we realized that the HEPI platform amplifies ground noise at this
frequency (see next point). This problem is reinforced for "weak"
signals (for cross coupling, or for HEPI platform rotations). In order to
reduce this noise, I am currently modifying the system_ID
method, I first added 3 geophones on the ground so i can measure the ground noise and remove the part of the
signals that is coherent with the ground geophones. It produces a significant
improvement (coherence goes from 0 to 0.7/0.8). the second thing is to filter
the drive with the inverse of the expected TF (using the model), it enables us
to drive the resonances less and thus to increase the mean magnitude of the
drive (when using white noise drive, of course, this method was already used in
stepped sine to avoid breaking the pendulum). I am still playing with this but
it has already improved the coherence a lot.
5)HEPI resonances
To understand this 10Hz issue
better, we did some experiments using positions sensors, geophones on optical
table and accelerometers we could move on the structure. The HAM has 3 major
resonances at 7 9 and 12 Hz (Y, X, Z). By comparing with old data taken on the
other HAM, we noticed both present the same resonances. The strange part is
that the positions sensors in the piers don't see this resonance but the
geophones on optical table do. With the the
accelerometers we have been ale to detect the flexible point that causes this resonances : the gallwings'
elbows, we are thinking about some ways to stiffen this part and decrease the
effect of these resonances.
6)last little thing, we have
measured the motion of the ground during vent up and confirm that it was the
cause of the problem we had when the pendulum's osems
went out of range in vacuum .
Simulation and Modeling
(Bhawal)
Weekly Physics Meeting
----------------------------
Matt Evans gave an update of
site activities at LLO. We discussed about various interferometer issues including
Wave Front Sensors and the observation that the WFS1 signal goes down as
temperature increases. This goes against what was observed in H1/H2 and the
theoretical results obtained from FFT studies [ref. T040066 by Biplab]. Probably more FFT studies including details like
mirror phasemaps and proper LSC locking, introduction
of differential heating to create intentional sideband imbalance etc would be
needed to understand the cause of this problem
.
Phase Camera and Fitting
Routine
-------------------------------------
(Biplab
and Hiro) We mainly worked on (i)
testing matlab fitting routines used to fit phasecamera images to Hermite-Gaussian
modes & (ii) studying (with SimLIGO's time-domain
simulation) if the phase camera's 1 sec scan-time (while mirrors may
swing and the modal content of light coming out of the interferometer may vary)
can distort the modal information of the beam in a significant way. We made
satisfactory testing of the fitting routines and found that the scan time does
not significantly affect the information of the beam-content.
Simulation of 40 meter
interferometer
------------------------------------------
(Monica) I'm trying to
simulate transfer function from Mach-Zehnder steering
mirror to the asymmetric port using the e2e psd
module and injecting on the MZ steering mirror a sinusoidal signal at a given
frequency. Other transfer functions will be done either with a sinusoidal
signal or white noise.
Code Maintenance
---------------------
(Melody) Working on
speeding up the dynamic link process used in the FUNC_X primitives. Currently looking for a way to export the symbols of the shared
library to improve the link process performance.
Also
working with Tom Evans to build E2E in their system (which uses gcc 3.4.1).
E2E has been tested using gcc 3.3.3. There are
some link issues which need to be resolved using the new version.
Alfi
-------------
(Bruce) Work on the chaining
of Links to allow them to be used recursively in opaque boxes.
Data Analysis Activities (Lazzarini)
Brown: - Still working on
writing MACHO paper: a draft should be ready for the collaboration by Monday's inspiral meeting.
- Learning more about the
details of post-Newtonian theory.
- Added time domain inspiral template filtering to the inspiral
code.
- Writing complete
documentation for all the inspiral codes.
- Talkedto
prospective grad student Diego Fazi about a possible
LIGO data analysis project and submitted a SURF project proposal.
- Helped Stuart configure the
CIT condor pool to allow Lee Lindblom's MPI numerical
relativity codes to our access idle cycles.
- Helping Stuart and Dan get
Condor and the grid tools installed after the Fedora Core 3 upgrade on the
cluster.
Creighton:
This week, and for the
previous two weeks, I have been working on result validation code for Einstein@home.
Chatterji:
* Preliminary spectrogram
studies of S2 and S3 accoustic events identified by
the Q pipeline are available at the following (passworded)
URLs.
Other microphones are
being investigated based on suggestions by R. Schofield and J. Zweizig.
- http://ligo.mit.edu/~shourov/q/airplanes/
- http://ligo.caltech.edu/~shourov/s3_h1_airplanes/
The improvements associated
with the accoustic mitigation effort are readily
apparent. However, some accoustic coupling is
still evident by eye and H2 appears more susceptible than H1.
* Investigating coherent and
targeted sky search for bursts using the Q Pipeline.
* Continued work on upgrading
LPEFilter DMT class.
Mandic:
I worked on the time-shifted
stochastic analysis of the H1H2 Hann case. In
particular, the time trace of one detector is shifted by deltaT,
and then the usual analysis is performed. The purpose of the study is to
understand the behavior of the noise in the CC spectrum on the time scale of a
few seconds.
I also got gpssync to work again - this piece of software allows
synchronized hardware injections at the LLO/LHO sites.
Mendell:
Participated in LIGO Hanford
Observatories program "Say Hello to Einstein@Home",
to start our "World Year of Physics" activities. More can be
found here
http://www.ligo-wa.caltech.edu/010805_event/010805_event.html
and
http://www.ligo-wa.caltech.edu/world_year/iyp_events05.html.
A comparison of efficiencies for
detection above the loudest event for the StackSlide,
Hough, and PowerFlux searches was run. First
results
are posted on the (password protected) PULG S2
investigation page:
http://www.lsc-group.phys.uwm.edu/cgi-bin/enote.pl?
nb=puls2stackslide&action=view&page=22.
More comparison are under way
for presentation at the Feb. 3-5, 2005 PULG F2F meeting in
Shawhan:
* Reviewed final version of
S2 known-pulsar paper.
* Starting the formal review
of the StackSlide and PowerFlux
methods for wide-area pulsar searches.
* Worked on S2 untriggered burst search paper.
* Released a new version of
the LIGOtools 'segments' package.
* Figured out how to retrieve
data from the GEO frame server (with help from Martin Hewitson)
to collect interferometer status information.
Sutton:
This week I have been
studying techniques for solving the inverse problem for GWBs;
ie, determining the sky location and h+(t), hx(t) for a generic
GWB. I compiled and distributed a long list of comments and suggestions
regarding global detector networks in response to Saulson's
memo of Dec 21. At Landry's request, I also re-ran SenseMonitor
over the E11 data to produce complete records of the alpha and beta factors for
the "official" calibrations.
Zanolin:
Corrected
two bugs in the time estimation part of the stand alone parameter estimation
module in matlab. Further testing of the module above performed. Background study to choose the new astrophysical motivated
waveforms for the LIGO Virgo collaboration. Spent time studing and discussing with K Rawlings Feldman-Cousisn limits with post veto.
Lazzarini:
Working to implement a toy
reconstruction algorithm based on the maximum entropyy
method. While my main motivation is developing a measurement-to-map algorithm
not requiring matrix inversions, it appears that many of the same ideas may be
applicable to network-based burst detection (coherent detection).
LIGO Data Analysis System
Software Systems (
LDAS:
Continued
migration effort from Redhat 9 (RH9) to Fedora Core
(FC3) this week. Last Friday's
initial testing showed a tremendous slow- down in the performance on the
threaded LDAS-DEV environment. After a bit of detective work and a few experiments
it was learned that the use of the LD_ASSUME_KERNEL environment variable that
was first introduced to stabilize RH9's threads was the cause of the bottle-
neck. Removing it brought the performance back in line with best results
previously seen AND as an added bonus, has greatly decreased the random
unexplained job failures seen with RH9/LDAS. There have only been a couple of
days of testing LDAS under FC3 so the port is not yet considered ready for
prime time, but we expect to be able to have an LDAS release by early to mid
next week, just in time for the mini-run.
Several issues were
discovered with the createRDS command code that
popped up with the recent changes to the underlying C++ code in the frameAPI that made the createRDS
command more flexible for creating RDS frames in the neighborhood(time) of data
drop-outs in the raw frames. This came up in E11 as a "wishlist"
item for the next release and has been implemented in time for the mini- run.
The issue had to do with incorrectly populating the phase field of the timeseries in FrADC structures of
the RDS frames and with not completely passing history metadate
from all input frames into the RDS frames. Both have now been fixed.
The SINSTALL rules used to
build LDCG were enhanced to fix the "whoami"
program overwrite when GNATS was installed.
Effort continued in support
of the system administrators as they upgraded the various system
from RH9 to FC3. This typically meant backing up databases, reinstalling DB2, restoring
databases and testing out LDAS once the system was brought back up.
The issue with
LD_ASSUME_KERNEL still exists in a few of the utility-helper programs that
support monitoring LDAS and the Database. These are being sorted out this week.
Tcl/Globus:
A first draft of the
instructions for how to use the TCL/Globus test
suites was sent out for review. The document is in LaTeX
and converted into PDF for publishing on the web. A first attempt at casting
the document into HTML from LaTeX proved useless and
a new tools for translation is being sought. Work on
the document also revealed a few minor issues with the test scripts which were
also fixed while drafting the document.
OSG/Grid3dev:
Since the machines for
installing grid3 software will be available in 2 weeks time, I have been
installing the grid3 software on an FC3 workstation to check if there might be
any problems. As part of this, began working with beta version of VDT-1.3.0
which is the required version for grid3-dev. It installed fine but requires a additional configuration.
Hardware Systems (
Caltech
-------
(Dan Kozak)
* Replaced T3 and 3510 failed
disk drives.
* Fixed stuck tape in tapedrive.
* Restarted LDR after 2 coredumps.
* Investigated how QFS
striping works when growing an existing filesystem.
(Phil Ehrens)
* Connected the new 80
cluster nodes to CIT Beowulf switch.
(Al Wilson)
* Upgrading the LINUX
machines on cit to Fedora core 3.
(Stuart Anderson)
* Upgrading the LDAS-CIT
cluster to Fedora Core 3.
* Working with
----------
(Igor Yakushin)
* With the help from Excel,
the new T3s are physically installed into racks, fiber cables connect T3s to
the switch, UPSes are
installed. The new blade with 8 ports is installed into the fiber channel
switch. What remains now is to configure T3s and include them into our file
system.
* SysKonnect
card is configured and working fine on gateway.
* Running badblocks
tests on second harddrives in the nodes.
* Working to restore 1% data
flow to CIT.
* Replaced 3 failed disks in
datagateway2 and 2 failed disks in datagateway. No
data was lost.
-------
(Ben Johnson)
* Expanded /frames on fb1 to
8TB, by adding 8 T3s to the filesystem. Filesystem was grown non-destructively.
* Added gig-E card to
gateway.
* Connected HDDs on all 138 nodes in operation. Nodes 139 and 140 will
have to wait until they are converted back to proper nodes.
* samfs crashed on dataserver
requiring a reboot. This seems to have been related to the stager, and caused
by running "release -n" on files that were in or were being placed in
the staging queue.
* Replaced HDD on node77.
General Computing (Wallace)
MIT:
(Keith)
-Swapped out orinoco wireless hub with one sent
from Caltech (so far so good - 2 days)
-Added new urop 'bbloom'
-Setup windows flexlm license server for algor
software
-Investigating wireless
solutions for nw22 dead spots
-Upgrading NW17-009 CAD pc to
XP
(
-This week I have done some testing
of the network connection between LLO and LSU. Using a shell account on a
machine located on campus I was able to confirm that there is a bottleneck at
our connection to campus. Monday I spent the afternoon on campus with
Boyd and did some further testing. Testing between a couple of other
machines on campus showed expected speeds ruling out the router on campus and
confirming that it was probably our router. Tuesday and Wednesday I put
together a Linux router to put in line replacing our current router to test
with. With moderate hardware and no firewall rules I was able to
significantly improve the performance of the connection. The next test
will be with the firewall rules duplicated to see to what degree it degrades
the performance. Whether or not we replace the current router with a
Linux router or not something needs to be done. The bandwidth spike
visible at
http://kahuna.net.lsu.edu/mrtg/corerouters/ligo-liv.html
shows the test I performed last night. It shows a peak at about 2:00 am
this morning. -Working with Solsoft on a couple of
support issues and also working on getting a temporary license to test with
Linux.
-Working on a couple of Matlab licensing issues.
(Christine)
- Network usage can be seen
at
http://www.ligo-wa.caltech.edu/~christin/mrtg/
198.129.208.1_198.129.78.122.html
- Downloaded some of the
latest versions of software from Caltech ITS. Made the
software available to all users in the standardsys
directory.
- Updated a couple of the
guest PCs to the latest versions of software, virus updates, Windows updates,
etc. One of the PCs was infected with a virus which had corrupted some of
the system files. This required a repair of the Windows OS.
- Created some new user
accounts for a couple of visitors. Provided procedures
for getting a contractor setup on our network.
- Spoke with NOAnet again about an alternate network connection. NOAnet can provide us with network service to
- Other misc. user support.
CIT:
(Mike)
-40 Meter: Worked on an
access point for the martin network, to resolve a networking issue. Plus update
all GC computers with service packs and reregistered Mathematica
licenses. -Ghosted Workstation(s): Irene Baldon,
Sharon Kammerling, Cindy Akutagawa,
-Paul Russell/Peter King: I
reloaded their lab workstation to accommodate protel
DXP. This required a hardware upgrade, and OS reload from 2000 pro to XP pro.
Plus I re-loaded all GC software and many engineering packages.
-Loaner Pool: Reloaded a
laptop for the loaner pool. I have turned this back into Ed Chargois.
-RMA: I setup multiple RMA's on faulty hard disk. I have turned this over to Ed C.
for shipping.
-Worked with Larry Wallace
moving equipment around in the server room.
-Spam Filters: Continued to
work on spam filters with Larry.
(Veronica)
- LIGO: Updates to
- LSC: Website
updates. Assisting Irena Petrac
with webpage setup for MOU reviews.
- CaJAGWR:
Website updates and user support.
(Larry)
-Purchased a few PC's to start
replacing some of the PC servers and to allow for at least one unit to be used
as a spare. Working maintenance issues with CIT on SUN boxes and with Foundry
for the network equipment we have installed. Received and distributed a number
of purchased items that arrived this past week.
-Worked on a couple of
wireless issues. Most were standard problems with the exception of the 40M
wireless unit, which was worked with Mike and Jay. It had issues with the MAC
address with one of the rack units. Once we were able to track that down Jay
was able to change the MAC address which allowed the wireless unit to see the
rack unit on the network.
-Swapped some equipment
around in the computer room with Mike and Veronica. We are installing a new
tape robot. We tried swapping out a KVM switch but found that not all of the
PC's would work with the new switch so we still have the old one in place.
-Updated the patches on a
number of PC's as well as the definition files. Assisted Mike in debugging a
few PC problems. Most dealing with Spyware
corruption.
-Worked on a number of user
accounts. Updating old ones, reactivating a couple of accounts in-which the
password had expired and removed a couple more dead accounts.
-Performed another full
backup of the user accounts. These tapes will be shipped to the Hanford
Observatory for storage.
-Cleaned up and resolved a
number of web related issues. We are working on centralizing a number of items
that are currently located in users home accounts and should be located
somewhere else.
-Continue working with the
mail services. Assisting Mike with the filters.
E-mail statistics Jan 06, 05
- Jan 12, 05:
Rejected Mail
10,789
Virus
859
False
Positive 83
Accepted
12,537
Total
Mail 23,326
Adv. LIGO Systems
from Dennis
Coyne
See
also the AL
Systems web page
See also the RODA
status web page
No changes since the last weekly report
·
nothing new
·
nothing new
·
Held the first of two SEI/BSC Critical Review meetings. The focus
of this meeting was on cost and schedule issues, but the status of all
technical concerns were also addressed. A review report from the committee is
expected by 1/30.
From: "Thomas Frey" <tfrey@ligo.caltech.edu>
Progress Period from 12.17 to
01.13
Out of the office for
the holidays from 12.17 through 01.09
·
See http://www.ligo.caltech.edu/~tfrey/index.html
for a complete listing of all project related cost and schedule data.
Accomplishments:
·
Sub-system PLANNING activities
§
Continued work on preparing web space for posting
Adv. LIGO reports. ("The Whole Enchilada")
§
Started work on the 40-Meter schedule changes.
§
Finished work on progress update with progress
through
§
Executed brief telcom with
Carol.
§
Read materials provided as part of the SEI meeting.
§
Continue to catch up on filing from last year.
·
ROSTER
DATABASE:
§
Assisting Irena as needed on record changes.
§
Assisted Irena with setting up her web site to
accommodate review of attachment As.
·
COST
BOOK DATABASE:
§
Continued work on changes to estimates for AOS and
IO.
From: Larry Jones <ljones@ligo.caltech.edu>
Advanced LIGO Seismic Structure
SEI Structure:
As of late afternoon on 1/12, no new drawing releases have been posted by
ASI.
The next monthly status meeting will be held on
The Information Exchange meeting will be held on
Actuators:
The stripped bobbins were received at Caltech. Bob Taylor precleaned them as before and shipped them to the PSI shop
in MS for winding.
Displacement Sensors:
Nothing new.
Seismometers:
Nothing new.
Galling/Dusting Test:
Nothing new.
From: Janeen Romie <romie_j@ligo.caltech.edu>
AdLIGO Suspensions
Working on tablecloth design details and interface
with Calum, Tim and Mike PL.
Met with Riccardo about maraging
steel. We have some sheet material that he may use. He showed us his rolling
machine.
Reviewed Justin's UK Scope document and provided comments.
Reviewed some drawings for Ian and Calum.
From: Helena Armandula
<ahelena@ligo.caltech.edu>
From: Peter King
<pking@ligo.caltech.edu>
AdvLIGO PSL
===========
I have been working on the intensity stabilisation
section of the conceptual design document. A small number of issues have
come up that I did not fully account for, namely the required testing of any electronics
in order to meet our electromagnetic emission control requirements.
From: Riccardo
DeSalvo <desalvo@ligo.caltech.edu>
Justin Kamp
From Cal Poly in
He will be working testing monocrystalline silicon
flex joints.
He started setting up his experiment in the Synchrotron hall. Eventually the
experiment will be carried out in vacuum.
Marco
I improved the beam height on the optics bench and raised the cavity height by
2 cm. After cavity realigning, Im studying the
difference of the output beam on the fundamental mode from a perfect Gaussian
profile. For a while Im watching a large coupling among higher order modes, which
means misalignment and perhaps not good mode matching. The measurements are in
progress.
Riccardo and I mounted the first new maraging springs for the cavity suspensions. We noted at
once a strange deviation from elasticity. After finding the working point, I
measured the curvature of the two blades which turned out to be uniform within
5% and compared the blades hardness with other maraging
blades.
When I measured the hardness of the blades with the machine shop hardness meter
I found that the used hardness meter is not calibrated ,
so I compared its reading with old blades of known hardness ~50 to 52 Rockwell.
I observed a not negligible difference from the old pieces:
Tested blades Clamping point Blade middle
first old maraging blade 68.5 67.5
second old maraging blade 69.0 68.0
old mesa cavity blade 67.0 67.0
new mesa cavity blade 63.5 59
We dont know if the problem is a zero point shift or
a change in slope of the reference scale: however, the old parts maraging hardness value was known to be 51, so I can
conclude that I observed a large discrepancy between 13 % and 22 % in Rockwell
scale.
Then we disassembled this spring I measured a sagitta of about 4mm in the two blades 150 mm which
were originally well flat.
These tests started a deep investigation about maraging
treatments and preparation and point towards a poor precipitation of Maraging.
Creep experiment: after a brief test at 400C, were now taking data at 1700C.
Note that for most of last month, when we believed to measure at 120oC, in
reality, because of a mistake in farheneit to
centigrade conversion, we were at 150oC. We therefore missed the measurements
at 140-150oC.
Juri
I just came back from
Riccardo
Updated draft OMC seismic attenuation table document is available in
Ligo.caltech.edu/~desalvo/HAM-SAS.doc
It contains final construction bids and prototype construction schedule.
The design drawings are available in the folder:
Ligo.caltech.edu/~desalvo/HAM-SAS
We are ready to start production.
If started immediately a finished passive HAM SAS unit could be ready as early
as end of March.
Cleaning and transfer to LASTI would happen after a round of passive
performance testing on the factory.
For additional information about this report, contact whitcomb_s@ligo.caltech.edu