Weekly Report for
Week Ending December 22, 2005
Due to the holidays we will not schedule the LIGO
Executive Committee meetings for December 26, 2005 and January 2,
2006.
Special Announcements: Happy Holidays!
Weekly
Report Highlights
No report.
LIGO Laboratory Administration (Lindquist)
STATUS OF LSC MOUs (Lloyd)
LSC MOUs and Research Plans and Progress Reports
- No report this week (vacation).
SITE TELECONFERENCE (Lindquist)
No site teleconference was scheduled Thursday, December 22, 2005.
- There
are no open assigned actions. The
list of assigned actions updated through December 1, 2005 (the last time
that it was updated) will be found Here.
PROPERTY MANAGEMENT (Chargois)
>From: Ed Chargois <chargois_e@ligo.caltech.edu>
- Provided
assistance to the Detector Group (K. Mailand) with packing and shipping of
a Chiller to (C. Vorvick) at LHO.
Account Number P386540.
- Provided
assistance to the Detector Group (J. Romie) with packing, shipping, and
the preparation of a Commercial Invoice for US Customs Clearance of
Maraging Steel 24x96x.27 to RAL ( I.Wilmut) OXON, UK. Account Number LIGO.PRLAS 5.16
NSFLIGO.FYO2CA.
- Provided
assistance to LDAS (S. Anderson) with the preparation of a Purchase
Requisition to complete the transaction between LHO and MIT for the Air
Condition Unit. Account Number
LIGO.DAT 1.5.1 NSF.FYO20F.
DOCUMENT CONTROL CENTER
(Turner, Mak)
>From: Linda Turner - turner@ligo.caltech.edu>
>From: Cleveland Mak mak_c@ligo.caltech.edu
|
Week Ending
December 22, 2005
|
In
|
Out
|
|
Packages
|
17
|
9
|
|
Faxes
|
15
|
12
|
- Scanning Project - Scanning of F. Asiri
boxes of files is very near completion.
They should be done within another day or two. Progress continues on scanning of old
blanket purchase order files.
COST SCHEDULE CONTROL SYSTEMS (Cunningham, Brambila, Kaufman)
>
>From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
- Completed
change order 168 to Triad and submitted it to the vendor.
- Working
on change order #10 to add $127K for FY2006 to the Air Liquide contract
which expires in 2007.
- Working
on completing the custom fabrication order for the actuators from
SouthWest Controls Inc.
- Completed
the reimbursement and submitted it for payment.
- Completed
the change order to Support Services and submitted it to the vendor.
- Working
on the maintenance contract for Sun.
>From: Florence Kaufman <fkaufman>
SUBCONTRACTS MANAGEMENT (Jasnow, Salone)
>From: Gina Salone <gsalone@ligo.caltech.edu>
- Nothing
significant to report.
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
- Progress
on the LLO Science Education Center continues on schedule, with concrete
being poured this week and the steel being delivered next week. The end of heavy construction,
particularly involving the use of big trucks, should only be a few weeks
away.
- A
consultant contract has been issued to Eric Myers for the performance of
grid computing outreach work under the subaward from FermiLab.
SUPPORT (Baldon, Hiroto, Lloyd)
>Irene Baldon
Processed the paper work for six (6) new/revised trips. At this time there are five (5) trips
completed or in the works but are awaiting the necessary paper work to enter
the P-Card system.
Completed nine (9) Expense Reports and there are nineteen (19) reports yet
to be done. I continue to contact
travelers who have outstanding Expense Reports (more than one (1) month old) to
ask for their cooperation in sending me their receipts so that these can be
closed in a timely manner. Presently
there are zero (0) report more than thirty (30) days old.
>
Party for LIGO [Thanks to everyone who helped make the LIGO Party a success
–pel]
>Dorothy Lloyd
- No
report (vacation).
- Jim
continued with data entry in the LIGO database and helping out in the DCC.
PROPOSALS and REPORTS (Lindquist)
We are going to have to put together an annual report for the Outreach
Program immediately following the holidays.
DCC Steering Committee (Lindquist)
Nothing to report.
CHANGE CONTROL/CONTINGENCY MANAGEMENT (Lindquist)
- Change
Request CR-050010, Prototype Seismic Attenuation System for the HAM
Chamber (HAM-SAS) will be found at: http://www.ligo.caltech.edu/~phil/ChangeBoard/CR050010.pdf.
This change request was submitted by Dennis Coyne. If approved, the
change request will add the fabrication and test of a predominantly
passive, seismic isolation system prototype for the HAM chamber to the
Advanced LIGO R&D program. We will schedule a meeting of the
LIGO Change Board to discuss this request.
HUMAN RESOURCES (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
Quality/Safety (Tyler)
>From: Bill Tyler tyler@ligo.caltech.edu
Nothing significant to report.
LIGO Hanford
Observatory (LHO) and Interferometer Operations (Raab)
Summary of
Commissioning Activities at LIGO Hanford
Observatory (compiled by M. Landry)
Some highlights from the elog
are bulleted below:
- Network
access to and from LHO was down for about 24h on Wed/Thurs
- pulsar
injections were restarted on all IFOs, with new
parameters (reduced amplitudes for all but two pulsars), new calibration
(actuation) functions, and a new (proper) injection sign
- new
versions of StochMon have been started, we can now display
1-live and 2-live versions simultaneously
- the
effects of the IFOs triggering from ASPD1-4 to
ASPD5 on DMT monitors is summarized
4K IFO
- A study
was made of the H1 and L1 loop and optical gain stability
- if we threshold on pixel fraction (say, 0.3-0.7)
instead of binary inspiral range, running the
interferometer at reduced power 1dB helps, even during the evening
shifts. Here,
1dB of reduction in laser power reduces the range by a
Mpc or so, and brings the pixel fraction down to
0.2-0.25.
- changing
the origin of the power source and isolating cable shields reduced
coil driver noise on MMT3 during our Tuesday maintenance period
- Recall
that the fine actuator distribution box had be replaced at EX; once this
was done and high useism returned, we re-tested
the DARM->fine actuator feedback. The useism
servo gained us over a Mpc at these times, so the loop is now closed in
all science stretches.
- new
WFS1 notch filters were readied,
as were MICH
and PRC ones for RM violins
- LHO IFOs show a
propensity to burst on 1/16s
intervals. LLO does not show this behaviour
quite as markedly
LIGO Livingston
Observatory (LLO) and Interferometer Operations (Zucker)
L1 Interferometer (Frolov)
The interferometer BNS sensitivity remained at 10 Mpc
this week when the level of micro-seismic activity was below the 95% historic
average. The duty cycle showed modest improvement to 57% from 50% last week but
was at the design 90% for the weekend.
The main loss of duty cycle was due to very high micro-seism on Friday
and due to PSL work on Tuesday.
The Tuesday maintenance period had to be extended to install and later
uninstall the new PSL periscope PZT driver electronics. The driver board had to
be disconnected from PZTs due to the high level of
noise introduced into the interferometer from Mode Cleaner input beam motion.
The second PZT was found to be broken on Wednesday.
We are currently running with only one PZT connected. In this configuration
the slow drift of the MC input beam can mostly be compensated without going to
the PSL room. Once again the 40m lab team helped us out by kindly lending us
their spare PZT. It is expected to arrive to LLO on Friday. The plans for the
PZT replacement and additional diagnostics will be discussed later today at the
LLO commissioning meeting.
Other activities this week:
- The
new LSC code was installed to allow the readout of individual AS photo
detector signals at lower bandwidth
- The
signal from the software trigger to the fast shutter was properly mapped
in the software and connected on the cross-connect - there is an instability in the multi loop plant between the Mode
Cleaner and Common Mode loops. One of the small optics resonances around
15 Hz was reported to be excited during the power up script. The current
solution is to lower the Mode Clean angular control gain during the up
script and bring it up to the nominal value at the end of the script. The
excitation could be related to the slow drift of the Mode Cleaner input
beam alignment during the weekend running with both PZTs
disconnected, which produced excess frequency noise and therefore larger
Mode Cleaner drive.
- The
performance of the software anti-symmetric port trigger was characterized.
The goal of the study is to reduce the rate of the false triggers while
remaining sensitive to the large seismic disturbances such as a train.
- The
investigation of the seismic motion with a period of thousands of seconds
showed that it is correlated with the excitation of the bounce modes. The
mechanism of this correlation is being explored.
- It
was found that the Beam Splitter Centering servo has a large turn on
transient. The transient could be
related to the clearing of the history buffer which was done differently
at LLO and LHO. After switching to the LHO scheme of not zeroing the
buffer, the transient was found to be dramatically reduced in three
instances of going through the up script.
CDS (Bogue)
- Helped
Rolf install new LSC code.
- Saw
some suspicious behavior on a delaronde, a dmt box. Worked
with Shannon to verify that there had
been no break-in on the box. Turned
off unnecessary services. Fixed the
last log. Fixed syslog. Configured syslog
reporting to a central server.
- Worked
with Valera
on a beam centering problem.
Computing and Network Security (Roddy)
- Ran
a nessus scan on the internal net and DHCP
machines. Found several windows
boxes that were not auto-updating the microsoft patches. One box was one that does not have a
user assigned to it and usually sits idle.
Took care of this one... It had not been patched in MANY months. A couple others were just users that
were not setting windows to auto-update.
The problem was that there were certain vulnerabilities created on
the network due to this, but the firewall mitigated any risk. However, if the user were to connect to
a VPN on another site (such as caltech) then it
is likely that a compromise could have happened, unless it is filtered on
the VPN end.
- Investigating
some items on Delaronde with Lisa today. More on this later...
- fixed a bug in the Arkeia
backup software. Several hosts were
showing up twice in the software after we upgraded the client versions.
- still experimenting with Solaris 10 and ZFS, etc.
- documenting what I have done in the past with LDAP so
that the other GC sysadmins have access to my
many iterations of installing LDAP and migrating NIS+.
As often is the case, documenting it seems to take nearly as long
or longer as doing the task itself.
- looked through the server logs on mail.ligo-la
for some evidence of weird behavior.
A couple of users have noticed odd email behavior, but I have not
been able to find anything as yet.
- usual rounds of pouring through IDS logs. Just a couple of statistics, in the last
2 weeks, we have had:
~1500 port scans
~51,324 ssh brute force attempts
>800 IIS hack attempts (glad
we don't run IIS)
>6000 hits by search engines
>1,100 php
server attempts
etc.
etc.
General computing (Giardina)
- new auditorium PC installation, and application
installs.
- Mac
GPG and mail plugin installation on my laptop
- ran
Windows update on a rogue PC
LDAS admin (Giardina)
- troubleshooting
problems with node9
- sent
tapes LL0561, LL0562, LL0629, LL0680, LL0682, LL0684 to CIT
- added
20 tapes to L700 library
Data analysis (Yakushin)
Storage/Condor/LDAS admin:
1) Configured
a web server on ldas-jobs.ligo-la.caltech.edu for users to display the results
of online searches.
2) Getting
SG1_S5 burst MDC from PSU through LDR to be used for sensitivity studies of
online burst searches.
3) Helped
Xavi to setup hoft account
for online h(t) generation.
4) Received
new SUN storage hardware for fb0 and cluster user disk space.
Data analysis:
1) Worked on automating the generation of waveburst
scalograms for loud triggers. For an example,
see
http://ldas-jobs.ligo-la.caltech.edu/~waveburst/S5_LIGO_ONLINE_0/
818784013-818870413/OUTPUT/coin/1/scalograms.html
2) Released the first version of standard waveburst S5 online search page:
http://ldas-jobs.ligo-la.caltech.edu/~waveburst/S5_LIGO_ONLINE_0
3) Working on estimating waveburst pipeline sensitivity on hardware and software
injections.
Initial LIGO Detector Science & Engineering (Coyne)
CDS
see also the CDS weekly meeting
minutes in the commissioning
archives
CDS Software
No report
CDS Hardware
Nothing significant
DMT
No report
PSL
Nothing significant
Optical Metrology
No report
40 Meter Interferometer (Weinstein)
IFO Commissioning, PSL
- Rana
and Steve have been tuning up the PSL. Rana did a temperature scan on the
MOPA, and found a good stable spot far from any mode-hopping. The beamline
to the FRC was re-aligned. The PMC transmission is measured to be ~ 76%,
which isn't great (we've had more than 85%) but is acceptable. The ISS
pickoff beamline was adjusted, and 2 optics were
removed from the path.
- The
FSS, PMC, ISS, MZ and MC servos are all working, although their gain and
UGF will be optimized once we increase the power.
- The
FSS slow loop was updated to the current version by Peter King.
- Steve
and Rana will redo the PMC reflected beamline to get the right amount of
light on the RFPD and the camera.
- The
PSL periscope steering mirror is still unplugged. To be investigated.
- Still
need to adjust the FRC periscope position, and the mode matching.
- The
mode cleaner locks reliably, but the alignment seems off, probably because
of a misaligned input beam due to the PSL periscope steering mirror being
off. The WFSs don't work in this state.
- Osamu
has realigned the PSL periscope steering mirror and MC. Now, IP-POS and
IP-ANG QPDs look good, and the beam is centered on the ITM.
- Both
arms can be locked. The BS needed some adjustment in pitch. The arms have
about 0.5 W incident.
IFO Modeling
- Osamu
continues to work on the e2e model of the 40m, and is now adding realistic
seismic motion.
- Rana
has been thinking about lock acquisition with AdvLIGO. Given the available
force at the test mass, he estimates that AdLIGO is a factor 50 away from
being able to aquire lock. He's thinking about what can be done,
especially with suspension point interferometers. He suggests that we use
e2e to investigate the lock acquisition difficulties with realistic TM
velocities.
DC Detection Development
- Ben
is continuing to work on the Solidworks design of the DCPD mount assembly.
Should be finalized in the beginning of the new year.
- The
output mode cleaner is fabricated. Steve is having them build a protective
fixture before we bring it to the lab.
- Lee
Cardenas is assembling two DLC PZT mounts for a test of the OMMT steering
mirrors. Mike showed Steve and Dan how to assemble the PZT tilting
platform to the DLC mounts without torquing the PZTs. Mike submitted DCNs
for the changes.
Electronics, Controls, Computers
- There
hasn't been any progress in Alex's attemps to recover the 3.7 years of
minute trends on our failed RAID array.
- Ben
is finishing a diagram of the new TT FSS as implemented at the 40m.
- Five
RFPDs are well underway in their final assembly at Wilson House. They will
soon be ready for Ben to tune their RF frequencies.
- Steve
notes that there are still OSEM glitches on MC2 UR, although most of the
other OSEMs look ok. This is believed to be a problem with the ICS110 ADC
in one crate.
- Mike
Pedraza is setting up a new operator consolde (Blade 1500) for us.
Lab Infrastructure
- The portable air
conditioner in the control room is bad; out for repair.
Thermal Noise Interferometer (Black)
No report.
LASTI (Ottaway)
No report.
Data Analysis and Computing (Lazzarini)
Simulation and Modeling (Bhawal)
Simulation Tool
(Hiro) modeler_freq, a
spectrum analyzer in e2e framework, was improved to support various features
supported in modeler. Transfer function measurements using the system developed
for modeler becomes much easier. Various
ideas to make e2e more attractive for experimentalists were discussed with
Osamu.
AdvLIGO
(Hiro) Yi Pan calculated the effect of mirror
curvature errors and finite aperture. We discussed about the implication in
terms of the requirement of polishing. Various
transfer function calculations for the scattering noise estimation is still
under way.
FFT
(Biplab) More calculations to
cross-check AdvLIGO cavity results with Pablo Barriga (Univ. of
W. Australia).
Preprint of our paper "Numerical Calculations of Diffraction Losses in
Advanced Interferometric Gravitational Wave
Detectors" is currently available for review by LSC members.
Simulation of 40m Interferometer
(Hiro) DC readout simulation
still going on. - Difference between e2e and twiddle simulation has not
been resolved yet.
Alfi
(Bruce)
Last Week: [PR -- Problem Report]
- Completing
work on multiple warning handling (PR 470.)
- Fixed
a serious bug where multiple node deletes was
causing confusion for background bundle content update threads (related to
PR 470).
- Starting
work on complete enabling of bundler I/O renaming in inherited instance
nodes (PR 511).
This Week:
- Completing
enabling of bundler I/O renaming in inherited instance nodes (PR 511).
- Fixed
related bugs with associated to deletions of connections connected to
bundler ports, and the re-designation of bundler primary i/o as the bundler secondary i/o.
Data Analysis Activities (Lazzarini)
Shawhan:
- Attended
GWDAW
- Fixed
problem with DMT triggers at Livingston
- Worked
on conlog configuration reporting and control
- Organized
planning for S5 burst data analysis
Yakushin:
1) Worked on automating the generation of waveburst
scalograms for loud triggers. For an example, see http://ldas-jobs.ligo-la.caltech.edu/~waveburst/S5_LIGO_ONLINE_0/818784013-818870413/OUTPUT/
coin/1/scalograms.html
2) Released the first version of standard waveburst S5 online search page:
http://ldas-jobs.ligo-la.caltech.edu/~waveburst/S5_LIGO_ONLINE_0
3) Working on estimating waveburst pipeline
sensitivity on hardware and software injections.
LIGO Data Analysis System
Software Systems (Maros for Blackburn)
LDAS
Work continues on supporting 64-bit compilation of LDAS (PR#2958). The datacondAPI is
the one API which currently fails its "make check". The issue appears
to be related to LDAS's interface into the third
party package cLAPACK.
There appears to be an issue with the TCL Channel interface to TclGlobus sockets. A problem report describing the failure
mode has been written.
Successfully completed the system and integration testing
on last Friday's build (1.8.30) of LDAS.
TCLGLOBUS
TclGlobus has been extended to verify the
environment variables X509_USER_KEY and X509_USER_CERT and unsets them if they
do not reference a valid file. This prevents spinning in the globus layer when trying to validate user information.
Work has started to support service certificates within the XIO-based Tcl
channel interface.
GRID COMPUTING
Patches provided for the Inspiral
job for L4 gwf files does not produce a DAX when run
from Verruca nor is it parsable
with the SAX parser from Pegasus on Verruca.
It was discovered that Condor-G does not function after a clean shutdown. Extended
documentation by system admins is needed.
Gcc 3.2 was added to support Alex Sim's port
of SRM to FC4 which
currently has issues with pthreads. Testing of the
changes has been deferred due to testing of new OSG 0.3.4 release.
OSG 0.3.4 was installed on Verruca (osg-client) and on LIGO-CIT-ITB. Site-verify indicates
that daemons are up and configured properly on LIGO-CIT-ITB head node. Reorganizing
NFS mounts to Worker Nodes to conform to existing Condor installation and new OSG local storage
configuration requirements for "CE storage".
Attended OSG-INT meeting related to OSG releases 0.3.4
Hardware Systems (Anderson)
no report for 2005.12.22
General Computing (Wallace)
MIT:
(Keith)
- Continuing
to work on LDAP
- Extracted
data off of a failing hdd on scientist's desktop
- Replaced
/ rebuilt filesystem on new hdd
for scientist
- Post
doc linux laptop issues
- Building
XP desktop for data acquisition lab use
Livingston:
(Dwayne)
- new auditorium PC installation, and application
installs.
- Mac
GPG and mail plugin installation on my laptop
- ran
Windows update on a rogue PC
(Shannon)
- Ran
a nessus scan on the internal net and DHCP
machines. Found several windows
boxes that were not auto-updating the microsoft patches. One box was one that does not have a
user assigned to it and usually sits idle.
Took care of this one... It had not been patched in MANY
months. A couple others were just
users that were not setting windows to auto-update. The problem was that there were certain
vulnerabilities created on the network due to this, but the firewall mitigated
any risk. However, if the user were
to connect to a VPN on another site (such as caltech)
then it is likely that a compromise could have happened, unless it is
filtered on the VPN end.
- Investigating
some items on Delaronde with Lisa today. More on this later...
- Fixed
a bug in the Arkeia backup software. Several hosts were showing up twice in
the software after we upgraded the client versions.
- Still
experimenting with Solaris 10 and ZFS, etc.
- Documenting
what I have done in the past with LDAP so that the other GC sysadmins have access to my many
iterations of installing LDAP and migrating NIS+.
As often is the case, documenting it seems to take nearly as long
or longer as doing the task itself.
- Looked
through the server logs on mail.ligo-la for some
evidence of weird behavior. A
couple of users have noticed odd email behavior, but I have not been able
to find anything as yet.
- Usual
rounds of pouring through IDS logs.
Just a couple of statistics, in the last 2 weeks, we have had:
~1500 port scans
~51,324 ssh brute force attempts
>800 IIS hack attempts (glad
we don't run IIS)
>6000 hits by search engines
>1,100 php
server attempts
etc.
etc.
Hanford:
(Christine)
- Attended
several meetings about I2U2, an outreach proposal to create web access to
PEM data for high school classrooms.
- I
have scheduled testing and troubleshooting of the backup network for
Tuesday, 1/3/06. We don't have a
time yet. Some initial testing
showed that while we do have link lights all the way to the ESnet router, we can't ping or send packets between
LHO and ESnet.
- There
was another network outage from 10:40 a.m. 12/21/05 to 10:15 a.m.
12/22/05. I was unable to contact
anyone at PNNL. Larry finally contacted
ESnet who confirmed that the problem was between
PNNL and LHO. ESnet
was able to contact someone at PNNL who thought the problem was at
LHO. Magically at 10:15 this
morning the network suddenly started working again. The problem was apparently caused by
swapped fibers some where along the line between LHO and PNNL.
- This
network outage was another un-scheduled test of the backup network. I was able to confirm that my router is
properly failing over to the backup network. Packets are being sent from the internal
network to the backup circuit. The
backup interface on my router is not reporting any errors, but it is not
routing packets off-site.
- We
continue to have problems with some email addresses being returned with a
host unknown error despite the fact that only moments earlier email sent
to the same address went through. The
addresses that we are having problems with are all CNAMES for other
computers that are actually the mail servers. These CNAME records do not correspond to
A-records and sometimes the DNS servers return no A records found which is
then reported by the LHO mail server as host unknown. I'm still trying to determine what I can
do to fix this problem.
- Started
setting up a new laptop for a user.
CIT:
(Mike)
- Work
on wireless access points adding new users to the mac
address filtering list. Removing mac addresses
from database on laptops that have been surplus.
- DCC:
Getting familiar with the administration side of this new database
software. "SYNERGY" I am now ready to load this software to put
into action. Instead of running the software on one server I will be
splitting up these services on two servers per Larry's request. Database (SQL Server) will be loaded on
one server, and Web services for user access (SYNERGY) will be loaded on
another server.
- Spent
a lot of time looking for Primavera software (Monte Carlo) but came up empty. After
talking to Primavera sales people trying to get an additional media
package shipped out to us. Found out this is going to be quite expensive.
I am on hold with this issue for now.
- Spam
Filters: Continued work on the spam filters searching for false positives.
- Other
misc. user support and account maintenance.
(Veronica)
- LIGO: Website updates. Roster database updates.
- LSC: Updates of the database of the papers
under review. Website updates.
- CaJAGWR: Taped
and compressed the last talk. The
stream pointer is posted at the seminars webpage. Website updates.
(Christian)
- Dorothy
Lloyd - Helped Dot move files that were located in her local drive to the
network so she can access them from home.
- Alan
Weinstein - Configured new workstation with the standard Ligo image for Alan. I also Installed additional
software from ITS that he needed. Other misc.: Continued onsite
software/phone support.
(Larry)
- Working
a number of procurement related items for different groups. This includes purchasing licenses, maintenance
contracts and misc. h/w supply items.
Just purchased a few more items for the engineering sandbox. The new
h/w should improve the performance on their analysis programs.
- Spent
a great deal of time working phone problems. Hopefully, they are all cleared
up.
- Assisted
a number of users so they can work remotely while they are on travel during
the holiday.
- Assisted
the DCC with a couple of document issues. Also, working with Mike on the
setup of the new DCC system.
- Setup
a couple more accounts as well as removed a few more. Reworking the list of old accounts for
approval for removal.
- Resolved
a couple of problems on the backup server. Resetting of the volume system
has taken care of the error messages and let the system continue doing the
backups.
- Assisted
Christine in resolving the LHO network problem.
- Mail
Statistics for Dec 15-21, 05
Rejected
Messages 18,964
Virus
Messages 927
Accepted
Messages 12,361
Total
Messages 31,325.
Advanced LIGO and Supporting R&D (Shoemaker)
Advanced LIGO Systems, Management
Systems
See also:
AL
Systems web page
AL Systems email
archives
Records Of Decision or Agreement (RODA)
See also the RODA
status web page
- Nothing
significant to report
Requirements
- Nothing
significant to report
Interface Issues
See the
"Interfaces" section of the AL Systems web
page
- Justin
Greenhalgh and Dennis Coyne are working through
the comments on the SUS related Interface Control Documents (M050438).
Vacuum Compatibility
Vacuum Preparation [Cleaning, Baking, Residual Gas Assay (RGA)]
See also the Vacuum Bake Lab
High-Irradiance, Contamination-Exposure Cavities
Lee Cardenas, Liyuan Zhang
Changes highlighted in yellow
|
Cavity
(Location)
|
Material/Item
|
Start
|
End
|
Comments
|
|
Cavity #1
(OTF Lab,
Bridge)
|
“Cable wire” (material type?)
|
~11/17
|
TBD
|
No
Change: The cavity has been aligned & locked. Taking daily ring
down and absorption measurements.
The digital oscilloscope failed so a new one has been
ordered, along with a refurbished pulse generator.
----------------------------------------------------------
The test for 40 pieces of MMG nickel plated Nd-B-Fe magnets (for Helena Armandula,
SUS ) has been completed and removed from the
cavity.
|
|
Cavity #2
(OTF
Lab, Lauritsen)
|
NA
|
NA
|
NA
|
Cavity
not ready. It needs some other optics(such
as: polarizing cube, 1/4 wave plate and some curve mirrors and lens) and the
electronics. We have used/borrowed some of the optics from this system to
accomplish
the completion of the other two cavities. Recently the 700 mw NPRO laser was
used for Garilynn’s experiment and it needs
to be realigned to the cavity.
|
|
Cavity #3
(OTF
Lab, Lauritsen)
|
OSEM Flexi-circuit cable,
qty ~ 45
(Helena Armandula,
SUS)
supplied by Univ. Birmingham (Stuart Aston)
|
~9/30
|
TBD
|
No change:
taking daily absorption &
ring down measurements
DuPont Flexible Circuits. The whole part to be
constructed of 'flexi' i.e. no 'rigid' sections. (Stuart Aston,Univ. of Birmingham, SUS/UK subsystem)
- Start Laminate: Kapton (LF8515)
(document link: http://www.dupont.com/fcm/products/H-73244.pdf
Coverlay (x2): Kapton
(LF0110)
(document link: http://www.dupont.com/fcm/products/H-73245.pdf
DuPont Pyralux
Series - Kapton / Acrylic Adhesive system.
(document link: http://www.dupont.com/fcm/products/H-73246.pdf
--------------------------------------------------------------
OSEM
emitter & photodiode 40 of each, (Dennis Coyne, SUS
) Test has been completed. Results to be posted by Liyuan
Zhang soon.
|
|
Queue
Priority 1
|
2 Cleaned 50ppm transmission mirrors, 1 in dia., REO coated --
|
TBD
|
TBD
|
witness samples for the LHO vertex volume (added in
6/29/2005 vent)
|
|
Queue
Priority 2
|
Stepper
Motor (Riccardo DeSalvo,
possible SUS or ISC use)
|
TBD
|
TBD
|
Stepper Motor sample had been placed
into Cavity #1: Power dropped from 175 mW to ~25 mW after introducing the stepper motor sample, and
continues to decrease. It is very hard to keep cavity locked. The stepper
motor may have contaminated the mirrors. Will re-test when a cvity becomes available again.
To be rebaked soon using the self-heating capability of the
stepper motor (not just the oven heater controls)
|
Seismic Isolation
From: "Joseph A. Giaime" jgiaime@ligo.phys.lsu.edu
Agenda for the weekly SEI telecom
Friday, Dec 16, 2pm Eastern, 1pm Central,
11am Pacific time
Announcements
- HAM
SAS report in preparation.
BSC SEI status, Ken/ Dennis
- Blade/flexure
PO issued, maraging
steel delivered to vender.
- Decided
not to pre solution anneal the steel, but to be sure that we support the
flexures vertically when precipitation hardening.
- Test
stand anchors being modified to bolt down to floor. One side leveled
optically. Clean room going up.
BSC work, adaptive modeling and FIR (Rich M)
- Adaptive
FF tried with single chamber-mounted Wilcoxon
accelerometer as the source, with some success, limited by stop touching.
HAM control with VME (Pradeep)
LLO HEPI update, Shyang Wen.
- Since
ITMX was fixed, Shyang has been working to
redesign the ITMX and ETMX to address the test mass bounce mode. No
results yet.
- Design
for the HAM2 tilt filter has been constructed and tested. Results
analyzed and will soon go on the llo ilog.
ETF platform work - Matt & Brian
- Sercel L-4C lock-up issue: we should contact Sercel and work toward solving this problem in the
long term.
- All
12 DOF loops worked as of last night, open to air
currents. (So, no noise performance measured.) 10 Hz gain of
tilt loops tweaked up a bit since last time around.
- Quad
pendulum frame installed. Some tests expected before the holiday
break, perhaps followed by other ETF tank being moved on top to keep out
wind.
- William
East has finished thermal instrumentation and is testing it on a block of
metal in an insulated box.
- L-4C
readout noise investigation underway, to quantify (e.g.) current noise at
very low frequencies of OPA-27 and LT1012.
Seismometer work - Aaron
From: Jay Heefner jay@ligo.caltech.edu
AdL SEI ISI controls at LASTI
- Wiring
diagrams are 990% complete. Rack layout drawings are 90% complete.
- A
sample of the Fischer connector for the STS2 pod cable has been received.
Initial fit check was successful. Connectors for the STS pod harnesses are
on order.
- Pod
cable drawings for the L4C and GS13 will be completed in early January.
LASTI HEPI Controls
- Wiring
diagrams and rack layout drawings for the conversion of 3 HEPI systems to
PCIX controls have been started and should be complete by mid-January.
Suspension
From: Janeen Romie romie_j@ligo.caltech.edu
Worked at Caltech last week on the quad. Also worked with Ric in the Physics Machine Shop on Nergis's
fixtures. He hopes to have them out to her before Christmas. Met with Carol and Dwight
on suspension schedule, review schedule, labor loading for production. I
have a number of actions due to them by Jan 6th. Provided a rework of the test mass drawing to
Gari for the noise prototype ETM. Coordinating with Brian O'Reilly on his visit
to LASTI for quad installation
From: Calum Torrie ctorrie@ligo.caltech.edu
Quad Suspensions
We are continuing with the re-assembly of the quad in the Caltech
clean-room. Photos to follow. We hope to have it all assembled by the end
of today. (Maybe even suspended.)
Install Fixtures
Ken and I have put in the order for the actuators. Mike Gerfen has
started to make the adjustment tooling (the alternative to the air bearing etc
...) The original set of install
fixtures are now almost complete and Ken and I hope to lay these out in the
workshop today.
Structure FEA
Not much to report from ANSYS. Although I have measured the resonances of
various configurations of the lower structure, results to follow.
From: Ken Mailand kmailand@ligo.caltech.edu
I’m working on shop drawings for the SUS installation plate style
fixture for Calum, I have the major details complete,
and Mike Gerfin at CES, has ordered the 5 plates, for
the main assembly. Calum is ordering the lift
actuators specified in Oddvar’s assembly.
Core Optics
Nothing significant to report
Pre-Stabilized Laser
From: Peter King pking@ligo.caltech.edu
Nothing significant to report
Auxiliary Optics
From: Michael Smith smith@ligo.caltech.edu
I am building a complete 4K Vertex with Zemax
optical beam lines in Solid Works. HAM and BSC chambers are in place, PO telescopes and steering mirrors, I added cavity beam
dumps mounted to the existing BSC mounting structures in LIGO1.
Phil Willems and I scrubbed the manpower needs and
revised the scheduling for Photon Drive Subtask.
Hiro is working on obtaining transfer functions
for scattered light noise in ADLIGO.
For additional information about this report, contact S. Whitcomb or P. Lindquist