The LIGO Executive Committee Agenda for Monday February 7, 2005 will be:
(Meeting time: 10:30 am Pacific Time)
Special Items:
no report
STATUS
OF LSC MOUs (Petrac)
LSC MOUs
and Research Plans and Progress Reports
For a web page summary showing the
status of LSC MOUs and associated Attachment updates
through August 15th and Progress Reports through February 12th see:
http://www.ligo.caltech.edu/~irena/Revstatus/Reviewstat.doc
Non-LSC MOUs
SITE
TELECONFERENCE (Lindquist)
A site teleconference was held on
Thursday, February 3, 2005. The following items were among those discussed:
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, Lloyd)
>Irene Baldon
>Dorothy Lloyd
PROPOSALS
and REPORTS (Lindquist)
Nothing to report.
DCC Steering
Committee (Lindquist)
We held a meeting of the DCC steering committee February
2, 2005. The purpose of the steering committee is to establish a
direction for the DCC over the next year or so. This meeting focused on
reviewing thoughts submitted so far and defining a next step. It appears
that additional time will be needed to ruminate on the requirements.
CHANGE
CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Quality/Safety
(Tyler)
>From: Bill Tyler
<tyler@ligo.caltech.edu>
Drafts of the safety audit reports for the LIGO campus labs were distributed to
audit team members for review and comment.
Summary of Commissioning Activities at
LIGO
LHO Outreach
LHO hosted about 50
FOR ALL THOSE WHO GAVE AND
KEPT GIVING ON THE HEPI PROJECT, HAVE A LOOK AT OUR E12 UPTIME STATISTICS FOR
L1. WELL DONE GUYS!!
L1 Commissioning (
---------------------------------------------------------------------
Interferometer locking and
running has been robust this week lending the successful start of the E12
engineering run. The sources of backscattering were identified on the
transmission monitor and the reflected light optical tables. The mitigation of
the backscattering noise and the increase of the interferometer input and
detected power by a factor of two gave significant sensitivity improvement. We
now routinely run with inspiral range of 5 Mpc with the best range close to 6 Mpc.
The calibration team is very confident quoting the interferometer sensitivity
now (much better then 20%).
Summary of commissioning
activities:
- the
lenses on transmission monitor optical table were replaced. The unused beam on
reflected port table was properly dumped. The light on the POX was reduced and
unused beam properly dumped.
- the
new whitening filters were correctly compensated with digital filters
- two
additional anti-symmetric port photodiode installed and commissioned
- the
interferometer calibration was performed.
- The output matrices for the
LSC and ASC were tuned.
- the
automated NoiseBudget code was released. Now it takes
just a few minutes to obtain the contribution of the main known noise sources
angular, shot, dark, oscillator phase, electronics
to the interferometer noise.
- the
frame builder(fb0)computer was rebuilt. No CRC sum check errors were reported
since.
- the
liquid nitrogen leak was detected due to the stuck pressure relief. The block
valve on the dewar was
closed. The nitrogen level remained on 85%. The line was cooled down next
morning. The cryopump is functioning properly.
- the
main laser NPRO started overheating and going into standby mode. The NPRO
cooling lines were cleaned. At the time of this writing the NPRO temperature as
well as the main laser performance have been stable for several hours,and ifo
locked in the low noise mode.
- one
instance of channel hopping was reported.
Safety and Security (Riesen)
---------------------------------------------------------------------
Found pinched wires ( intermittent short to ground) between the Kantech controller and the door contacts on the staging
bldg’s 2nd floor foyer doors. These wires were the cause of our
numerous false “forced door” alarms we have been experiencing.
Wires were replaced and the monitoring of the door appears to be functioning
properly.
Modified
the site security schedule to accommodate Gaby’s visitors this weekend
(2-5 and 2-6).
Found no safety concerns
during my site tour. (conducted before the E-12 run
began).
L1 Commissioning (Peter King)
---------------------------------------------------------------------
I trouble-shot a few
potentially dead boards. An LSC differential driver board was found to
have 3 of its 16 channels dead, this was turned in as
a blown board due to a hot-swap.
L1 and AdL
Mechanical Engineering (Spjeld)
---------------------------------------------------------------------
AdL Quad SUS Installation Fixtures
- Review of new design
suggestion in weekly SUS meeting on Feb. 1
- Awaiting from input from
Dennis Coyne (on design) & Ken Mason (on FEA)
- Checking feasibility of
pneumatic actuator design with bellows vendor.
- Tested air bearing removed
from pier at LLO for use as fine alignment.
AdL SEI Engineering Effort
- Finally got PDMWorks client working (thanks to Mike Pedraza!);
able to log on to server at Caltech. Will be posting AdL SEI models at the end of Feb.
- List of existing/expected AdL ISI drawings from ASI in progress.
- AdL
ISI web-page in progress; will be up on main LIGO web-page by middle of next
week.
- Still working on technical
notes document from ASI meeting.
Misc. Engineering
- Shipped Photon Calibrator
Shelves to LHO; updated drawings and BOM.
- Sent drawings of
re-designed GS13 sensor platforms to machine shop; awaiting quote and
manufacturing.
- Received quote from Kaman
on position sensor repairs;
HEPI Valve Calibration
- calibration
of new servo valves in progress; no valve failures lately
- waiting for bad valve in
return from LASTI for analysis and re-calib.
Upcoming Tasks
- finish HAM door lifting
fixture design (before S4?)
- look into shutter problem
LLO General Computing and
LIGO CyberSecurity (Roddy)
---------------------------------------------------------------------
High Power Laser Facility,
Optics Modeling and L1 Commissioning (Franzen)
---------------------------------------------------------------------
1) The broken IPG laser was
packed and sent back for repair. The RTP crystal which was exposed to a >80
W, <0.7 mm beam for almost three weeks did not show any damage.
2) Participated in the
Optical Workshop at Caltech. Gave a short presentation about recent
Advanced LIGO mode cleaner Melody model results.
LDAS/Condor Sysadmin and Burst Analysis (Yakushin)
---------------------------------------------------------------------
Condor/LDAS admin:
1) /frames
is doubled in size and can now hold a week of raw frames (Dan).
2) /cluster was created and
QFS mounted on fb1 and Condor nodes to communicate the output from
astrophysical searches running on the cluster to the control room (Dan).
3) /fb0_frames was QFS
mounted by both fb0 and LDAS servers (Dan, Alex).
4) E12 data archiving, RDS
generation and publishing is running OK so far. There was an interruption
yesterday caused by the fact that "segment. server",
5) Received GigE switch from CIT.
6) Two hours after the start
of E12, there was a request from Brian to add several new channels to L1 RDS.
The new channels appear in RDS starting from 791327328. Since at least some of
those channels were not present in raw frames before that, we cannot regenerate
the earlier RDS frames with the new channel list.
Data analysis:
1) Generated waveburst triggers on the whole S3 (final version of
calibration was just released).
2) Setting up online
infrastructure for waveburst. Automating
job launching and visualisation of the results.
3) Generating triggers for E12.
see also the CDS weekly meeting minutes in the commissioning archives:
tight crates or racks for LHO. Some additional EMC crates
are needed as spares for LLO and for the CIT test stand. It is possible that we
will build acoustic enclosures around the existing racks and/or ISC tables,
after S4.
Rolf
Bork reporting
Not
much to report, as I have been at LLO a fair amount, and will be again next
week.
today, including a number of MEDM screens. Tomorrow I will
start the front end
software and hope to be testing by Friday.
Jay
Heefner reporting
============================
-
First system built. Preliminary tests are positive.
-
There is a mechanical problem with P2 on the Transmitter board, but board will
function without the connector.
-
Right now we have enough parts to make 12 of each board type. Sander will
verify that this is sufficient.
================================
-
Waiting for list of desired frequencies from sites.
-
Test plan is complete.
================================
-
LHO has 3 boards. 2 are the final configuration, 1 needs
to be upgraded.
=================================
-
Waiting for final markups from LHO.
================================
-
Building two more ISS boards.
no report
no report
Mike
Smith
I
presented an overview of the TCS optical design at the Optical Modeling
Workshop (held at CIT, 1/31).
I
proposed several mechanisms for creating astigmatism in the AP beam of the LIGO
IFO. UNL0CKED RECYCLING CAVITY--1) cold state: the as-installed BS curvature
will introduce approx 2-3% astigmatism during a single pass of the input beam
through the un-locked recycling cavity, 2) hot state: non-axially symmetric
heating of the ITM may create cylindrical thermal lensing
which would cause up to 10% astigmatism during a single pass of the input beam
through the un-locked recycling cavity. LOCKED RECYCLING CAVITY-- hot state:
the coupled fundamental eigenmodes of the optimally
coupled (determined by optimal TCS heating of the as-installed mirrors) recycling
cavity will exhibit approx. 20% astigmatism. This astigmatism could be worse if
the ITM heating is non-axially symmetric.
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 pumping with Ion
pump.
The turbo pump has been shut down and the whole system fully covered.
Absorption Test Measurement prototype shut
down
Scatterometer system still
in progress
The fused silica substrate RM06-B is in the scatterometer
enclosure.
We are taking a second scanning for this substrate after a mirror surface
cleaning has been done.
The scanning will last three days until Saturday and Sunday will be fully shut
down and the
whole system will be covered for the A/C maintenance.
The Quantronix 60 watt laser
fully shut down and covered
Preparation to cover all the system in two rooms is fully in progress
It will be done by Friday, except room F058 since scanning still in progress
until Saturday.
OTF Lab at Lauritsen ROOM 38
Cavity
#3
no major changes
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.
The measurements continue to be the same which means, samples are
"clean"
The data will be treated later.
Cavity #2 in standby
Preparation of removing items needed to stay is in progress
since the entrance of the lab will be occupied by Eric's experiment.
All this will be done also by Friday
Misc...task
Packed all the boxes related to the Co2 laser chiller parts plus
two chillers fully assembled, ready to be shipped, all these are storage.
This week we received four of
our fused silica mirrors back from REO, who had stripped the old, silica-tantala coatings off of them and repolished
their concave surfaces. We plan to have some of the new, lower-loss coatings
developed by Jean Marie Mackowski and company applied
to these mirrors. Once coated, we will measure the broadband coating thermal
noise and see if it is as low as predicted.
We have also been working
with Jay Heefner to put together a linux-based, epics system for automating lock and for data
acquisition, with the goal of characterizing non-Gaussian noise in the mirrors
and suspensions of the TNI. The automated locking system has been in place for
some weeks now, and we are working with Jay to do data acquisition next. This
week we ordered some computer equipment to replace the components CDS had
loaned us to get this system up and running.
Finally, we have started
setting up an experiment to measure non-Gaussian noise in silicate bonds. This
experiment was originally to be located in the OTF lab, but the asbestos
removal project will make that lab inaccessible starting Monday. We have a new
location for the experiment, and have made arrangements for the move to be
completed this week. Many thanks to Lee Cardenas, Denis Coyne, and everybody
else who helped us find a new room for this experiment,
and especially to Lee for helping with the move!
no report
(Hiro)
I attended this workshop and summarized the works done using e2e and
FFT. The modeling results for the optimal heating of H1 and L1 seems to
be consistent with measurements. More accurate calculations using FFT
will be provided to be included in the summary report of this workshop.
Measurements of H2 is quite contradictory with a naive
optical
calculation, and this issue will be looked into using FFT.
The effect of the beam splitter thermal heating was also discussed.
Both analytic estimations and FFT results using Phil's phase map were
presented. By heating BS, the load on ITMx can be
reduced, but BS
introduces some astigmatism. It is necessary, if we go for this this
direction, to study the effect of this astigmatism to make sure it is
not harmful.
The beam profile on the output optics bench showed astigmatic behavior.
This was measured twice, by Luca&Joe and by
Keita. Keita's measurement
showed that the major axis of the astigmatic beam is rotating. It has
been shown that this rotation can be explained by a large offset of two
waist positions, in x and y direction, and by a tilt of the beam
direction by a few milli radian. This is consistent
with the accuracy
of the device placement on the table. The conclusion is that these two
measurements indicates that (1) beam is astigmatic by 20-30%, (2) the
axis of the major/minor axis of the beam cross section is off by 20-40
degree with respect to the table plane and (3) the waist positions in x
and y plane (or in the plane of major and minor axis) are off by 4 - 7
cm, i.e., around 1 Rayleigh range.
These documents (G050061 (e2e), G050062 (FFT),
G050063 (astigmatic
beam) ) are available from www.ligo.caltech.edu/~willems/IFOModes/
together with all other presentations in that workshop.
Analysis of Phase Camera Image
----------------------------------------
(Biplab) Worked on fitting
and analysis of phasecamera images. Large
variation in total energy in the sideband images for different
Thermal states was observed but that did not have much correlation
with the variation in Sideband recycling gain (i.e.SPOB).
Trying
to get measured data for the individual sideband gains. This may
provide better information about higher order mode content in beam.
The beam center moves a lot on the camera and width also changes.
Planning to make an estimate of such variations originating from
either the core or output optics and understand the results.
Presented results in the workshop on "Spatial
Modes in IFO"
(LIGO-G050068-00-E).
Simulation of 40 meter interferometer
--------------------------------------------
(Monica) Understanding of Twiddle simulation code. Use
of 40m Twiddle
code to compare with e2e results. Some modifications in 40m e2e code
due to the implementation of "substrates mirrors" as done in 40m
Twiddle code.
Modeler
--------------
(Melody) Documented the changes done to the E2E
scripts.
Finished documenting the FUNC_X code and script
changes.
ALFI
--------------
(Bruce) Updating and rewriting Alfi documentation.
This hasn't been
done for some time and there are
many new features.
(Melody)
Alfi is going to adapt a new version of JAVA library JGo, from 5.0 to 5.1.
Modified the code for the JGo 5.1
to fix some null pointer exceptions.
Continuing with regression testing using the new JGo library.
--
Data Analysis
==========
(Shawhan)
* With Vuk Mandic,
performed hardware signal injections during the E12
engineering run. We fixed some problems with the infrastructure (thanks
to Daniel Sigg and Alex Ivanov
for rapidly tracking down and fixing one
problem) and tried out new software for stochastic and pulsar injections,
apparently successfully.
* With John Zweizig, evaluated data quality flags for
S3 burst analysis.
* Released a new version of the LIGOtools 'segments'
package.
* Created new cosmic string cusp time-domain waveforms.
(Igor Yakushin)
1) Generated waveburst triggers on the whole S3
(final version of calibration was just released).
2) Setting up online infrastructure for waveburst. Automating job launching and visualisation
of the results.
3) Generating triggers for E12.
(Shourov K. Chatterji )
A new version of the Q Pipeline that incorporates calibration has been
posted at http://ligo.mit.edu/~shourov/q/code/.
This permits a coherent
search for bursts in collocated detectors by demanding both amplitude and
phase consistency in a given time-frequency-Q tile. It is being applied
to the search for bursts in H1-H2 double coincident data.
LDAS: (Kent Blackburn)
===================
Finished configuring the LLO and LHO LDAS system with the 1.4 release of LDAS
once the hardware upgrade was completed. Only MIT remains running an older
version of hardware OS and LDAS at this time. No word out of the hardware
group as to when MIT will be in a position to upgrade.
Added new databases for the E12 run at LLO, LHO and CIT. The DMT lead was
contacted prior to the upgrade to confirm that this was acceptable. It is now
being
used in the E12 run.
Continued to investigate the memory leak in the dataConditionAPI seen after
the upgrade to Fedora Core 3. A series of unique tests are being carried
out on
the LDAS-TEST system to try and learn more about the origins of the new
memory leak. The theory is still that the new OS is effecting
the memory in a
new way when dynamically loaded libraries are used.
Continued to prepare code changes to the diskCacheAPI
for inclusion into
LDAS. These code changes address several open problem reports from last
fall that are not critical, but would be nice to get out of the way.
Put a fix into CVS for PR 2776 - extraneous bytes in archiveIndex.
This fix
involves serialization of the updates of the archiveIndex
by all APIs.
Completed the system tests for version 1.4.9 of LDAS.
Results are on the web
in the usual place. Continued running datapipelines
on LDAS-Test in an effort
to better understand the memory leaks in the dataConditionAPI.
Will be using
the trivial I/O DSO to speed up the testing.
The upgrade at LHO was done without backing up the databases first. This
resulted in the lose of some data from E11 and
S3A which can be regenerated
when the DMT is available to rerun through the triggers (if there is an
interest).
TCLGLOBUS:
Added a status report page to the tcl/globus web site
which captures the current
state of the wrapping, testing and documentation of the different Globus toolkit
packages (http://tclglobus.ligo.caltech.edu/status.html).
Discovered a minor problem while testing globus_io_read(). The problem is
how to handle end-of-file flags issued by globus_io_read() and carry the data
from the SWIG layer to the TCL layer. NOTE: globus_io_read() is different
from globus_xio_read() in that we didn't have this
problem while testing the
XIO package version. Further investigation is needed.
Currently working on implemention
of several TCP functions of Globus I/O
package for testing in a TCL client/server model. These functions are:
globus_io_tcp_connect()
globus_io_tcp_create_listener()
globus_io_tcp_listen()
globus_io_tcp_accept()
The Globus I/O package currently has 19 of the 36
functions SWIG wrapped
and tested.
In order to gain more experience with using MyProxy
servers and to establish
a more realistic test bed for the routine testing of the TCL/GLOBUS project a
new server was setup to only run the MyProxy service.
A very old (original)
compute node from an LDAS cluster that wasn't being used was upgraded to
Fedora Core 3 and had Globus and MyProxy
packages installed and configured.
In the future this will also be used as the myproxy
server for LDAS once the
development team integrates Tcl/Globus authentication
and data movement.
Began wrapping and testing of the globus_gass_copy
package used for data
movement, e.g., gridftp.
GRID:
Met with Duncan Brown to learn how to run the Inspiral
code on the LSC
Data Grid. This will be modified to run on the Grid3 grid and will be used
as the LIGO application testbed for the Open Science
Grid.
LDAS System Administration (Anderson)
===============================
Caltech
-------
(Dan Kozak)
* Added 4 T3s to LLO /frames filesystem.
* Created /usr1 scratch dirs on CIT cluster, ldas-grid, ldas-pcdev1 &
ldas-pcdev2 for any users/nodes that didn't already have them.
* Installed/configured LLO's fb0 /fb0_frames filesystem (QFS, 3510 RAID array).
* Audited all tapes in the LLO L700 tape silo to resolve problem with
tapes incorrectly showing 0% used.
* Configured LLO /cluster filesystem out of available
T3 RAID units.
* Set up/debugged login problems with some grid accounts.
* Worked on keeping globus-rls-server running during
E12;wrote watchdog
script to restart it when it fails. Ultimately playing with the
timing
of when it was started seems to have "solved" the problem.
* Set up cron job to plot how far behind LDR
publishing has gotten.
* Worked on tuning LDR.
(Phil Ehrens)
* Debugged and updated scancluster cluster
maintenance
tool to accept list of explicit machine names on the
command line and to write log output to stdout
instead
of to file.
* Debugged and continued ongoing development of patch.tcl
remote system patch/unpatch utility. there are some
problems specific to running patch remotely that are
still unsolved.
* PR #2782 - getChannels interprets time as
1-second-long
range, matches two files, gives error. fixed and closed.
* MPI API error message associated with remote failure of
LAM made more descriptive and helpful.
* Testing curl-7.13.0 on ldas-dev system. Initial
test did
result in some problems, but these may have been due to
cacheing.
* PR #2773 - Gap in datacondAPI
memory usage.
seems to be due to an incorrect truncation
mechanism used
to handle 64 bit integers.
(Al Wilson)
* Upgrading ldasboxes 1,4,5
to fedora3.
* Setting up BB for fedora, upgrading to the new version.
* Finalizing the RPM's for the datacaches.
(Stuart Anderson)
* Working on multiple E12 LDR/Condor/NFS problems.
(Igor Yakushin)
1) /frames is doubled in size and can now hold a week of raw frames (Dan).
2) /cluster was created and QFS mounted on fb1 and Condor nodes to communicate
the output from astrophysical searches running on the cluster to the control
room (Dan).
3) /fb0_frames was QFS mounted by both fb0 and LDAS servers (Dan, Alex).
4) E12 data archiving, RDS generation and publishing is running OK so far.
There was an interruption yesterday caused by the fact that "segment. server",
5) Received GigE switch from CIT.
6) Two hours after the start of E12, there was a request from Brian to add
several new channels to L1 RDS. The new channels appear in RDS starting from
791327328. Since at least some of those channels were not present in raw frames
before that, we cannot regenerate the earlier RDS frames with the new channel
list.
General Computing (Wallace)
=======================
MIT:
(Keith)
-Installing new matlab license and software on
server.
-General user support.
-Just a lot little items.
Livingstons:
(Shannon)
(Christine)
Network usage can be seen at
http://www.ligo-wa.caltech.edu/~christin/mrtg/198.129.208.1_198.129.78.122.html
- LDAS has started really using the bandwidth available on the network.
They are averaging around 70 to 80 Mbits/s
with a few spikes up to 100
Mbits/s. They are running continuously
without interfering with other
network users.
- Last Sunday LDAS reported two network outages for short periods.
Investigation of the router does not show any network down time. It is
possible the network was just so slow it appeared to be down. The logs
on the servers don't show any problems either. Will
continue to monitor
the network to see if it happens again.
- Continuing to talk to NoaNet about an alternative
WAN connection.
Richard's contact at Qwest has provided preliminary pricing for a GigE
connection to Caltech which looks very promising. Albert and I will be
meeting with PNNL this week to discuss their new network connection.
- Finished a presentation for this weeks Cybersecurity
meeting.
- Misc. user support.
CIT:
(Mike)
-Worked on a Solid Works/PDMWorks issue for Oddvar over in
is an authentication problem when reloading the pdmworks
client software.
In order to correct this issue I will have to reload the PDMWORKS server.
-NTSRV's: I ran monthly ghost backups on all NTSRV's.
-Cleaned up and updated loaner laptops for the up coming LSC conference. I
have turned these over to Ed Chargois, for shipping.
-Janeen Romie: Currently
loading a new workstation with GC software and
many Engineering packages.
-Hiro Yamamoto: Setup wireless network for a
conference over in
-Other onsite/phone support, that included networking and software support.
(Veronica)
- LIGO: Website updates. Windows server
maintenance. Prepared several
high-resolution images for publishers. Roster database
updates. User
support for Sydney Meshkov with files/ images for the
- LSC: Updates to the March meeting website. Assisted
the DCC with web
postings of the MOUs, helped Linda with the basic
how-to of web updates.
Helped Irena Petrac with web setup
for the MOU reviews.
(Larry)
-Placed a few more orders for computers. More people are
needing notebook units
with dual boot capabilities.
Resolving issues on the maintenance contract for the Foundry
equipment. A couple
more iterations should have it wrapped up.
Put a hold on any more P-card purchases since I will not be around to reconcile
this month.
-Spent time working different licensing issues. We have the Ansys
group sending
the latest version of the s/w.
The IDEAS pkg. is held up because of a breakdown in communications. I gave the
new CIT s/w rep. the contact information for the IDEAS software pkg. and they
have since communicated causing some confusion in getting new licenses for the
LIGO group. I hope to get this cleared up in the next few days.
Took care of some SUN s/w licensing that is going through
campus.
-Spent some time working with Lisa in getting a new backup server built. So far
all of the h/w is not cooperating so we may have to use equipment set aside for
other purposes and order replacements for that equipment.
-Took another stab at getting some information/permission on getting a ligo.org
mailserver and another machine located at another
institution to fall under the
ligo.org domain.
-Assisted the DCC with various items. File conversions and transfers. MOU
related assistance.
Added more disk space for the DCC to put the public
documents. The whole system
needs to be reworked but there should be enough disk space to take care of
things until after the LSC meeting in
-Still working logistical issues related to the abatement taking place at
Bridge.
-Installed a couple of new computers. Testing out a new KVM
switch. Helped Mike
install a couple of rack mount computers that he will be building.
-Worked a number of backup issues. Recently, the robot backup system is not
working properly, I've reset everything and we will find out tonight to see if
things are back in working order.
Performed full home account and DCC backups. Just need
to backup the root
systems on some of the servers.
-The mail servers have been working OK this past week. Just
the regular
babysitting of the filters. The filter limits may be bumped up a little.
This
will probably allow more spam through but should cut down on the time we spend
having to go through the filters checking for false-positives. There will be
some testing done before we make any changes.
Mail Statistics Jan 27, 2005 - Feb 02, 2005
Rejected 11,301
Virus 1,112
False Positive 98
Allowed 13,367
Total e-mail 24,668
-The regular user support and account cleanup/modifications.
Assisted Mike on setup and cleanup of conference room.
Adv. LIGO Systems
from Dennis
Coyne
See
also the AL
Systems web page
See also the RODA
status web page
·
A new RODA has been issued:
M040005-01, CP to be the ultimate mass in the ITM reaction chain
The CP location, dimensions and mass are base-lined. In addition, the SUS is to
accommodate a ring heater and thermal shield to be provided by the AOS system
(details TBD).
From: "Mark
Barton" <mbarton@ligo.caltech.edu>
Systems Modeling
Hiro has asked me to make a start
on implementing an AdvLIGO SUS/SEI model in e2e. I
created a new library for my Mathematica pendulum modeling
toolkit which exports state-space results in a format suitable for use in e2e.
I then installed e2e/ALFI on my computer and started translating the Simulink AdvLIGO SUS model for
e2e.
From: Ken Mason
<kmason@ligo.mit.edu>
Advanced LIGO Seismic Structure
SEI Structure:
ASI has posted the finite element model of the BSC structure onto the ASI
web site this week. We are having difficulty opening these files with our
analysis packages and are looking at options.
There have been no additional fabrication drawings submitted to the ASI web
page.
A meeting is scheduled for 2/3 with ASI to review the status of the drawing
package deliverables.
Actuators:
Nothing new.
From: Janeen Romie <romie_j@ligo.caltech.edu>
AdLIGO Suspensions
Participated in the Glasgow Monolithic Suspension Workshop last week. It
was a great success and I was glad to have participated. Caroline compiled
notes from the discussions and has submitted them to the DCC under
T050010-00-K.
Mike Perreur-Lloyd has joined us here at Caltech for
a few weeks. We welcome him again and look forward to a fruitful collaboration.
I submitted the front and back ring drawings of the top mass tablecloth to the
Physics machine shop. I continue to work with Tim on the interface to the upper
structure.
Working on getting some Glenair
connectors to start vacuum compatibility testing. This will reduce risk
for they
Compiling Primavera data for Carol and Thomas. Working with Helena, Caroline, Norna, Calum and Mike P-L.
Working with Jay and Mohana on the
electrostatic drive electronics, getting ready for wiring up the gold mask.
From: Ken mailand
<kmailand@ligo.caltech.edu>
Adv. LIGO
I'm currently working on the lower suspension installation arm to move the
suspension
from a carrier outside the BSC chamber, to the fine locating adjustment table
inside the chamber.
Ive looked up some information on bake oven hardware
and cleaning solutions for possible in house use for Adv. LIGO parts.
I spoke to Riccardo re. his
previous experience with the air bake ovens, for possible configurations and
space requirements. This will lead to preliminary hardware cost estimates and a
cleaning procedure.
I have requested a ball park baking estimate from NTS based on our visit, not a
quote, just for our budgeting use. We can use this with Astro-Pacs
cleaning estimate and other shipping and handling costs estimates to compare
with our in house estimate.
From: ctorrie
<ctorrie@ligo.caltech.edu>
Advanced LIGO Suspensions Weekly Report (Probably in fact a monthly)
Design Meeting
Our weekly Suspension design meetings are continuing and notes can be found
via the following location.
http://www.ligo.caltech.edu/SUS.html
The notes from the Glasgow Workshop are available
on the DCC at: -T050010-00-K.pdf
Structure FEA
RAL, Glasgow and Caltech continue the work on the structure. This is split
into 3 sections. Upper Structure Tim Hayler
and Calum Torrie. Lower Structure Russell Jones and Mike Lloyd. Overall Structure Janeen, Calum, Tim and Mike Lloyd. We are close to meting
the goals laid out in the Quad Interface issues document by Dennis Coyne and
hope to present our results and assumptions to Dennis and the design team on
Monday of next week.
Mike Gerfen has been involved in the concepts we have
developed for the structure and under our current plans will make 2 structures.
One for the controls prototype for MIT and the other for
Stanford. In order to support the effort of eventually testing this
structure on the technology demonstrator we sent a LIGO I structure to Stanford
this week as a "guinea pig".
Parts at machine shop for Controls prototype
Work is finished on all of the suspended items for the controls prototype,
apart from the drum ended wires mentioned below.
Work has started on the top stage and tooling for the blades. This is being
done by a combination of campus and outside workshops.
The Wire Jigs and tablecloth for the top mass will go to workshop this week.
Structure work will hopefully start after our summary next week!
That leaves only a couple of outstanding items including the suspension eddy
current dampers and modifications to our gazebo.
Drum Ended Wires
The current plan is to incorporate drum ended or double nail ended wires in
the top stage of the controls prototype, wire diameter 1.1mm. A design for this
and its associated clamps are at present being released. The wire will be
manufactured in
From: Helena Armandula
<ahelena@ligo.caltech.edu>
Arranged a meeting with Gregg, Sheila and J. Hough to discuss
"Q" measurement results up to date.
A few discrepancies in the results between the thin and thick coated substrates
are being re-checked in order to have the characterization of all coatings
compiled in time for the LSC meeting. With the acquired knowledge on hand, a
new coating development program will be drafted to address coating research on
fused silica substrates.
From: Peter King pking@ligo.caltech.edu
A high power photodetector
is undergoing long-term exposure tests at
the 300 mA level. The plan is to let the photodetector run for a week and
re-measure its dark noise characteristics and then increase the power on
the photodiode and let it run for a longer period of time (about a month).
Work continues on the conceptual design document.
From: Michael Smith <smith@ligo.caltech.edu>
CIT OPTICAL MODELING WORKSHOP
I presented an overview of the TCS optical design.
I proposed several mechanisms for creating astigmatism in the AP beam of the
LIGO IFO. UNL0CKED RECYCLING CAVITY--1) cold state: the as-installed BS
curvature will introduce approx 2-3% astigmatism during a single pass of the
input beam through the un-locked recycling cavity, 2) hot state: non-axially
symmetric heating of the ITM may create cylindrical thermal lensing
which would cause up to 10% astigmatism during a single pass of the input beam
through the un-locked recycling cavity. LOCKED RECYCLING CAVITY-- hot state:
the coupled fundamental eigenmodes of the optimally
coupled (determined by optimal TCS heating of the as-installed mirrors)
recycling cavity will exhibit approx. 20% astigmatism. This astigmatism could
be worse if the ITM heating is non-axially symmetric.
From: Riccardo DeSalvo
<desalvo@ligo.caltech.edu>
Hareem
The maraging paper is now available on NIM Author
Gateway article tracking service from Elsevier
Article title: Study of quality factor and hysteresis
associated with the state-of-the-art passive seismic isolation system for
gravitational wave interferometrc detectors
Reference: NIMA42883
Journal title: Nuclear Inst. and Methods in Physics Research, A
Corresponding author: Dr. H. Tariq
First author: Dr. R. DeSalvo
Received at Elsevier: 14-SEP-2004
We would like to inform you that your article is now published online via ScienceDirect:
http://authors.elsevier.com/sd/article/S0168900204020637
Alban Remillieux
news about the Mexican Hat production are available in
http://www.ligo.caltech.edu/~desalvo/Alban-Mexican-Hat.ppt
juri
Studying material properties in thin films and coatings and their effects on
thermal and thermoelastic noise.
Studying the effects on the mesa beam profile of the measured deviations from a
theoretical curve of the prototype mexican hat
mirrors (using LMA provided maps)
Marco (03 Feb)
We are preparing the OTF laboratory for the asbestos removal works which will
begin the next week.
I took the last data by BeamScanner which will be
substitute by the BeamView Analyzer.
I tested the correct behavior of the two PZTs driver
boards and now Im assembling its box.
Im
continuing to take data at 170oC at the creep experiment.
For additional information about this report, contact whitcomb_s@ligo.caltech.edu