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The LIGO Executive Committee Agenda for Monday July 23, 2001 will be:
(Meeting time: 10:30 am Pacific Time)
Open meeting 10:30 - 11:30
Special Items:
no report
WBS 1.2 LIGO Operations--Administration
There was a teleconference on Thursday, July 19. The following were among the items discussed:
From: Ed Chargois <chargois_e@ligo.caltech.edu>
>From: Linda Turner - turner@ligo.caltech.edu>
Web pages for the DCC give simple how-to's for document numbering, easy access to the latest on-line documents, and search capabilities for the DCC database. Take a look. . .
ACCOMPLISHMENTS
ACTIVITY
| Packages | Faxes | |
| In | 29 | 32 |
| Out | 10 | 48 |
Press here to access the DOCUMENT CONTROL CENTER WEB PAGE.
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
From: irena@ligo.caltech.edu (Irena Petrac)
SUPPORT (Wood)
Progress Period from 07.0136 to 07.19
Accomplishments:
WBS 1.4.1.2 Project Controls (LIGO Construction)
A draft copy of the end-of-May Quarterly Progress Report has been distributed and several minor editorial comments have been received. I am holding the report pending resolution of questions regarding the percent complete status for the Detector and Civil Construction.
The following Change Request has
been submitted:
| CR-010006 | WBS 1.1.4 (OPS) | Roof Shelter for Concrete Pad Adjacent to Erosion Control Pond (Livingston) | M. Coles |
Press for the latest Contingency Needs Projection.
From: Kris Duncan <kris@ligo.caltech.edu>
From: Ed Jasnow <jasnow@ligo.caltech.edu>
No report this week.
General Items:
--------------
(F. Raab)
Nergis M. and Peter F. have managed not only
to lock the full power-recycled WA2K,
but to actually make it look quite easy. Took
about a minute after they "threw the
switch" to lock up first time and held for
about 10 minutes; locked up again about
30 seconds later. More elsewhere in the commissioning
section.
It appears that the mechanically "hung-up" mirrors
in WA4K repaired themselves
during the vent of the vertex section. We can
make up some kind of story to explain
it, but we were quite surprised by this. We will
continue to correct other placement
and alignment issues on this interferometer.
We experienced a roughing pump failure that burped some gas back into
a section
of WA2K while the system was unattended. All safety systems worked
as planned and
the gate valves to the beam tube were closed as is customary during
unattended
operation. Nonetheless, we realized that more gas than we would care
for would
have gone into the beam tube (1-10 Tl) if the tubes had been open,
even if there
were people watching the event occur. Stan, John Worden and I have
therefore
resolved not to open gate valves unless turbos and the their associated
roughing
pumps are valved off from the connected volumes.
Controls:
-----------
(C. Patton)
A new "Enhanced Autoclose" software has been tested, installed and put
into operation. The software provides perl/tk and medm GUIs which
allow
the operator to select a signal to monitor, a trip point, any
combination of beam tube gate valves and a start and stop button.
These
items can be selected for up to 5 sessions.
When the monitored signal goes higher than the entered trip point, the
"Enhanced Autoclose" software will close the selected beam tube gate
valves. An alarm will be sent to the alarm handler.
This software is currently being used to monitor the 25 l/s annulus
ion
pumps on the gate valves separating the 4k volume from the 2K volume
and
the beam tubes while the 4K volume is at air pressure and the rest
of
the system is in vacuum. If the annulus ion pump signals go above
the
trip point selected by John Worden, the LVEA beam tube gate valves
will
be closed by the software. A screen capture is available at
http://blue.ligo-wa.caltech.edu/screencapture/display1.gif
The original autoclose software is still operational from the gate valve
medm screens. The original autoclose monitors the cold cathode
pressure
gauges on both sides of the beam tube gate valves and closes the gate
valve if the cold cathode pressure is above 10e-7.
Detector: Optics and Installation: Alignment of the MC
and telescope has been completed, along with the core optics in the vertex.
We had a setback this morning. During the BS closeout an OSEM was bumped,
upsetting it in its mount. The optical lever had been zeroed, and
we are setting up to check the alignment with the PSL. Normally,
we'd use the COS autocollimator but in our haste to get the IAS tooling
back to LHO we're reinstalled the spool pieces in the manifolds and cannot
check alignment from the IAS survey position. (Jonathan Kern)
Electronics: General maintenance continues, with the installation
of additional grounds at the LVEA. RF survey of the LVEA ongoing. (Rus
Wooley)
Computing: The repairman has been here, and the front
color printer is working again.(Tom Evans)
Operations: Gearing up to resume Control Room activities
next week, when Commissioning resumes.(Rich Riesen)
Outreach: Prepared two presentations for general outreach
use. a technical one and another for non-scientists. (Joe Kovalik)
|
|
|
|
Installation&
Commissioning:
|
Other
Science/EngineeringActivities:
|
[Betsy Weaver, Mark Barton, Corey Gray, Doug Cook,
Richard McCarthy, Kyle Ryan, John Worden, Gerardo Moreno, Hugh Radkins,
Bartie Rivera, S. Whitcomb]
We have accumulated a better
understanding of the "event" that affected the digital suspensions on June
28. It appears that the input to the digital suspension processor
got confused and began to drive the suspensions with something other than
the normal sensor inputs--possibly channel shifting--effectively applying
"noise" to input. This noise would then drive up the pendulum/pitch/yaw
modes until they contacted the stops. During the 11 hours that this
took place, one can watch the small optic sensor signals gradually shift
to their greatly misaligned postions.
Four of the six small optics
showed a major shift; the other two and the five large optics (including
MMT3) showed no significant shifts.
The severity of the problem
is perhaps best characterized by saying that the mode structure of the
misaligned optics was radically different from what we see on a healthy
optic. A healthy optic has modes at ~.75 Hz (pitch), 0.8 Hz (yaw)
and two closely spaced modes at 1 Hz (longitudinal and sideways pendulum).
The misaligned optics had a modes at ~1.5Hz, 2 Hz, and 7 Hz.
We vented the vertex volume
for the 4 km interferometer to diagnose the problem with the four small
optics (and to make a couple of other corrections while we were in there:
tweaking the alignment of the ITMs and RM and correcting the modecleaner
length). After opening HAM1, in-chamber inspection of MMT1 and MC3
(two of the "sick" optics) revealed no obvious problems so they were removed
for closer examination. In the meantime, we took another look at
the behavior of MC2 and MMT2 (the other two sick optics, located in HAM2).
To our surprise, these optics seemed to be hanging normally--reasonable
looking sensor voltages and more quantitatively, showed the correct mode
structure for the pendulum/pitch/yaw modes! Setting up MC3 on an
external table, revealed that its mode structure also appeared normal.
The picture that is emerging
is one where the repeated contacting of the optics with the stops cause
an electrostatic build-up on the optic that caused it to misalign, and
possibly even to contact the stops. The venting process apparently
discharged the static charge. We still need to inspect MMT1, but
plan reinstall and realign the optics during the next week, as well as
complete the other tasks for this vent.
Preliminary testing of a independent
watchdog to monitor the optics and shutdown controllers if things seem
to be going out of control was completed.
[P. Fritschel, N. Mavalvala, F. Raab(!), Bill Butler,
Richard McCarthy, Josh Myers, Stan Whitcomb]
We installed the new rev B modecleaner servoamp.
The module sent up from Caltech for the 2 km interferometer had one bad
stage in the boost gain path, so we stole the 4 km unit until the 2 km
board can be repaired. Everything looks like it is working
properly, but we have not done a careful performance characterization.
Bill completed the first round of leveling of the
modecleaner to reduce the amplitude of the 16 Hz bounce mode. These
measurements lead to better definition of the requirements for the notch
filter in the feedback path to the laser from the modecleaner servo board
(mostly an increase in width of the notch to cover the different frequencies
of the different MC mirrors), and the notch board was tuned and installed.
Alignment, alignment alignment.
Aligned the interferometer. Aligned the ISC tables. Aligned the quadrant
photodiodes in the midstations. Routed cables, checked signals, set
levels, calibrated this and that. Locked the individual arms to set
rf phases, locked the PRM to set up the pick-off signals.
And last night in a marathon session, Peter, Nergis
and Fred completed the calibrations for the lock acquisition code.
Quoting the elog:
"FULL
2KM INTERFEROMETER LOCKED! (Nergis, Fred, PF)
After
several hours of manual alignments and measuring gain coefficients, we
put all core optics at their
aligned orientation and turned the interferometer
over to the lock acquisition
code. Within about 1 minute it had acquired
state 4. The first lock lasted
about 10 minutes, then reacquired in just a
few seconds. As the alignment
was manually tweaked to increase the arm power
levels, the lock period tended
to shorten, though it still re-acquires pretty
quickly, typically within 1
minute, often within ~15 sec.
The arm power buildup (NPTRR
& NPTRT) is up to 350-400x the single cavity
level (recycling gain of 10-11)."
In the midst of this work we had trouble with two suspension controllers. The BS controller blew one output coil driver, and was temporarily replaced with a small optics suspension controller . Later the MC3 controller started to show shifts in the output of the LL coil driver. It too was replaced with one of the units from the temporary set used to install the 4 km vertex optics. At this time we also tried some modifications to the steep lowpass filtering in the position damping loop, which Peter's model indicated should reduce the coupling of ground motion in the 10-20 Hz regime. Unfortunately the first cut seemed to bring up some added electronics noise around 8-13 Hz. We are looking into possible fixes for the latter problem.
I have been trying to get the Earth tide prediction
code up and
running. Initially I had some problems trying
to figure out which
ephemeris file to use. This was eventually sorted
out after a few
discussions with Hugh Radkins and Fred Raab.
The correct ephemeris file
has been generated and the tidal code compiled - the
slow network link to
LHO prevented transferring of the ephemeris file.
The remaining mystery,
for me at least, is the role of an array of 48 coefficients
pertaining to
the effect of the Sun and Moon on both arms.
How to generate the desired
coefficients was not clear to me.
A comparison of the common arm data from the recent
E4 run with the tidal
prediction results in a fit that doesn't look all that great.
Finalizing the RFP for development of an ADC module. It should beready by early next week. A DAC module RFP will follow.
[D. Coyne note: This is a development effort intended for advanced LIGO, but could be available for retrofit for initial LIGO if warranted.]
Lori and I are continuing to work on adding GDS test
points and excitation to
the system. Lori has completed the coil driver
code, but I still need to finish
the primary controller code before we can test the
whole system.
As I was testing yesterday, I noted that the ICS110B
ADC data had glitches in it
again. Using the VME bus analyzer, I found that data
was moving between channels
ie all data on a read cycle were in the wrong ADC
channel locations. After
further investigation, I found that after I send a
command to the ADC module to
clear its FIFO at the end of a data read cycle, the
FIFO was not empty. I
believe what was happening is that the FIFO reset
part of the code would get in
synch with the ADC module loading the 32 channels
of data into the FIFO, such
that the code would clear some number of channels
out and then the ADC module
would continue to load the remaining channels.
This results in the first read
on the next cycle getting an arbitrary channel rather
than the expected first
channel, which results in the data mix up. I
was able to correct this problem
by continuing to send the FIFO reset at the end of
a read cycle until the FIFO
indicated empty. (NOTE: The DAQ system does not operate
the 110B ADC modules in
the same fashion, so this would not pertain to DAQ).
Jay Heefner
|
Module
|
Needed
|
In Fab
|
Complete
|
Tested
|
|
PD Interface
|
29
|
34
|
0
|
0
|
|
Anti-Image
|
12
|
8
|
7
|
7
|
|
Universal Dewhite
|
22
|
25
|
0
|
0
|
|
LOS Coil Driver
|
14
|
18
|
0
|
0
|
|
LOS Bias Module
|
14
|
17
|
17
|
0
|
|
SOS Dewhite
|
11
|
16
|
0
|
0
|
|
SOS Coil Driver
|
15
|
0
|
24
|
24
|
|
Optical Lever Interface
|
15
|
13
|
4
|
0
|
Sander Liu
Received 10 housings for the LEMO version antialiasing
filter chassis. Will proceed to build 8 chassis for the field.
Our first modified timing module appears to be working
at LHO in the DAQ system
and a second one here in the digital suspension development
system. We are
modifying a couple of additional units to take up
to LHO next week such that we
can run more complete tests prior to committing to a new board design.
One of the Mode Cleaner Flat Mirror blanks being polished by Wave Precision was broken during fabrication. This is a fairly common occurrence with smaller mirrors. We are ordering several (~10) blanks of mode cleaner size to serve as material spares. One of these will replace the lost MCFM, the rest will remain unpolished, but could be used for any mode cleaner or 40 meter small optic as they have good optical quality. Having material on hand can save us ~4-5 months in processing, and the small blanks are relatively inexpensive (~400.00 ea)
As I left REO Tuesday afternoon, all 4 SPETM's had
been coated on Side 1 (HR).
All four masses had been cleaned on the second side
and were on the coating fixtures waiting to get (AR) coated.
Over the weekend, while running the calibration runs
for the AR coating, the ion beam source developed grid problems.
The grids were repaired and tested. Since the problem
persisted they were replaced by a new pair of grids and the calibration
procedure was re-started.
With the grids replaced, no further problems were expected. The coating should be completed by now.
[D. Coyne note: Helena discovered a flaw in REO’s warm liquinox cleaning procedure which results in water marks which could only be removed by an extremely fine grit, low pressure, short duration “polish”. REO will re-design their equipment/process to preclude the problem in the future.]
Miscellaneous ordering & shipping in support of
4k ISC table completion.
Tuned, balanced and characterized LSC photodetector
#21 for LHO 2k
mode cleaner reflection. Also troubleshot PD
#27 (from 2k reflection
port). In addition to a blown logic chip, this unit
evidently had
a "partially blown" photodiode (about 100 microamps
of dark current
and a factor of two higher noise than is expected).
This is the third
known instance of this disease, which may be caused
by ESD; it still
"worked" and was probably in service a long time with
the fault. The
diode has been replaced with one of the few precious
spares currently
on hand.
Submitted an updated list of LSC detector head test
data to the DCC
(E010138-02.pdf).
I've been analyzing the data that I took last week
on the LSC electronics. In particular
concluded it needed a diode replacement. The
cost for repair was quoted at
$5072. It seems that over the last 3 months,
the cost of repairing an NPRO
laser has gone up by approximately $1000 for the same repair job.
Sander Liu
Placed an order for a VMEbus 19" chassis and half height cabinet for the VME test set. Unit to arrive in approximately 4 to 6 weeks.
Lee Cardenas
I am preparing a chamber to bake small parts. Putting together the old vacuum pump unit which will serve to pump the small bake chamber. This chamber will be transferred to the South Annex when PSL vacuum bake needs have been completed.
Rick Karwoski
Received and shipped the DEI high voltage pulser to LHO.
This week we installed the
first phase of our data acquisition system. We
now have a 16-channel digital oscilloscope with a maximum bandwidth
of 50
kHz and resolution of 1 uV (at lower speed). We also upgraded
and tested
our modecleaner OSEM power supply, started work on a remote-control
test
cavity beam alignment system, and worked on several procurement issues.
Our sapphire boules are
quite late, so we called Crystal Systems and
relaxed our requirements to speed production. A preliminary analysis
indicates that relaxing our requirements will not affect our measurements
too badly, since we have no power recycling in the TNI. Currently
Crystal
Systems has three of our blanks in hand, so our reduced specs will
only
apply to the fourth.
Many
thanks to Flavio Nocera for building us a notch filter for our test
cavity servo, and to Janeen Romie and Todd Etzel
for providing new OSEM
sensor/actuator heads!
LASTI (Harry, Mason, Mason, MacInnis, Miller, Mittleman,
Ottaway, Robertson, Rollins, Romie, Sannibale, Shoemaker, Torrie, Zucker):
PSL: Optical alignment of the PSL table is proceeding quickly using
an
NPRO laser in lieu of the 10 W MOPA, still at Lightwave
pending repairs. Peter King and Rick Karwoski have set up a visit for
the week of 7/30 to help install the controls and test electronics.
A
new enclosure has been ordered.
VISITORS
PLEASE NOTE: The MIT high bay is currently a nominal
laser
hazard zone at TWO wavelengths whenever laser warning
signs
are illuminated. Protective eyewear suitable for both
1064
nm (OD 4 or greater) and 10.6 micron (OD 4 or greater) is
required.
We do have a supply of visitor glasses on hand, in
case
your personal eyewear does not comply.
QUAD PENDULUM PROTOTYPE: Norna, Calum, Janeen, Myron, Rich, Virginio,
Fred and Dan have now got both the main and reaction chains fully
suspended and very nicely balanced. It's beautiful!
#MZ
comment: This is a significant milestone. Attached photo
shows
Calum with the upper 3 stages (final test mass stage is
off
the bottom).
The shadow sensor/coil actuators have been installed and wired, and
preliminary indications are that they will in fact damp all the
eigenmodes properly (actually the first demonstration was
_anti_-damping, but the coil leads are being swapped as I write...).
Calum is heading home now after a very successful visit; Norna will
stay with us another week to kick off characterization of the normal
modes and to help lift the assembly into its vacuum chamber for detailed
testing.
VACUUM & INFRASTRUCTURE:
-Myron and Fred have completed torqueing of bolts on HAM21's external
SEI
support structure and started staging some of the SEI equipment for
return to LLO.
-Ken and Dan Mason completed specifications for and ordered the new
PSL
enclosure; this is somewhat of a departure in that it will in principle
eventually allow Class I status for the PSL (i.e. interlocked
and
baffled so no goggles are required in the high bay). It is also
fire
resistant for compatibility with a 200-W LIGO II laser down the road.
-Ken has designed and requested quotes on a system of cable trays,
based on Jay Heefner and Rus Wooly's detailed suggestions. At
the
moment it looks like we'll try to do the installation ourselves to
save
money. Unlike the sites, trays will be situated at beam tube
height to
preserve critical rolling/walking access under the tubes.
Simulation and Modeling (Bhawal)
Weekly Physics Meeting
----------------------
In Wednesday's meeting, Kathy (SURF student) talked about her
JAVA program
for generating gravitational wave time series which could be
used as
input to E2E mirrors. Luca Matone talked about his measurements
of the
transfer functions of electronic systems in LSC of 2k IFO and
how noise
level depends on gains and his future plan. This will also be
useful for
the work that Bill Butler (who visits us from LHO this week)
aims to do
on estimating the noise levels especially of electronic noise.
Biplab
described his and Hiro's work on mode mismatching. He also described
the
work (with Rick) on frequency sensor noises due to higher order
spatial modes.
Mode Mismatch
-------------
(Biplab & Hiro) More analytical calculations. More validation runs
for the recycling cavity. We decided that we'll first try to
compare with
real data for sidebands resonant in recycling cavity and then
decide if
we need to implement the modal model calculations up to 4th order
in e2e.
PSL Frequency Noise
-------------------
(Biplab) More discussion with Rick and some more calculations involving
Zernike polynomials.
Alfi
----
(Bruce)
- Revising initial draft of Alfi5 specification.
(Ed Maros)
- Completed work to reduce number of screen updates.
(Melody)
- Participated in discussions for the new Alfi design.
- Working on integrating the new Alfi design with the base classes
which have already been developed.
LIGO Data Analysis System
Software Systems (Blackburn)
On Tuesday of this week we implemented a code freeze on the LDAS CVS
repository to initiate the software testing for the next release of
LDAS
(0.0.19). This particular testing cycle is occurring without the use
of
the test system as it is still dedicated to file system software tests.
Instead we are making heavy use of the LDAS systems at the sites. This
has the added advantage stress testing the new hardware (dataConditioning
and beowulf) at the sites.
The first couple of days of testing at the sites revealed a half dozen
configuration differences from the routine development and test hardware
here at CIT. A meeting was held on Tuesday to organize a configuration
audit from the perspective of LDAS software to determine the needed
changes. These configuration tests are being made available on the
LDAS
webpages under the LDAS test page link which will be activated with
this
next release. Items being tested include the database tables, the user
accounts, the environment variables, swap space, etc.
The dataConditionAPI segmentation fault issues have been greatly reduced
through running hundreds of jobs using linear filtering and ffts on
a
sun smp box with a debugger attached. This process has allowed us to
track
down a couple of non-thread safe lines of code and make fixes. However,
the behavior on linux, while being significantly improved is not as
stable as the solaris code. This thought to be related to the maturity
of the OS and the kernel under linux. We have also determined that
the
2.95.3 GCC has non-thread safe STL routines that have been fixed in
the
3.0 release of GCC. It is expected that the migration to 3.0.x
later
this summer will also improve the stability of the dataConditionAPI.
Never the less, a back up plan is being formulated and discussed which
would involve migration away from threaded code towards a shared memory/
fork code model. Insights are too preliminary at this point to warrant
a deeper discussion.
The wrapperAPI has a new "safety valve" implementation to prevent jobs
requesting lots of memory from running hundreds of times longer by
using
memory from swap. If the wrapper detects physical memory usage exceeding
a user defined level it will through an exception, thereby preventing
code from running days or weeks when it would run for minutes or hours
if adequate memory was available or better memory management was part
of the search code software model.
KB was able to negotiate a $14,570 savings on a suite of software development
tools available for C++ QA and automated testing. These tools were
evaluated several weeks ago and found to be very powerful and quite
effective at finding bugs in our code. However, the original quotes
for
academic pricing were unacceptable. The new pricing and yearly upgrades
are extremely attractive. The use of this produce should significantly
improve the quality of our C++ source code.
Hardware Systems (Anderson)
LDAS MIT
--------
The installation of LDAS equipment at MIT has been started:
Installed Solaris 8 operating system and Maintenance Update 4 patches
on SB100 + E450.
Reconfigured D1000 disk devices
Reconfigured E450 internal disks
E450 work
Installed GE card
Installed Fiber card
Installed 2Gb RAM
Attached D1000 and T3 disk systems to E450
Started mirroring LDAS software to T3 on E450
Hooked servers up through KVM switch
LDAS LHO
--------
1) Installation of Sun fans for 72'' expansion cabinets (Sun Part #
X9819A) into Sun StorEdge Expansion Cabinets with the T3s was completed
on 7/05. Each fan unit for one rack consists of 6 fans divided
into two
trays with 3 fans each. Each tray has its own power supply, so each
tray
connects to its own power sequencer in the rack. The fan trays
also
have serial ports that can connect to power sequencers, though I haven't
connected these yet. No documentation came about the serial connection,
so I'll have to consult sun docs online before doing this.
2) Conducted test of the tapecontrol script and ldas monitor client
GUI
to prepare for E5. Some debugging of the GUI is needed, and some
fine
tuning the tapecontrol script is needed to keep up with the LHO full
frame data rate of 6.5 MB/s.
3) LHO beowulf nodes 6 reported an uncorrectable memory error.
Reseating the memory cards did not fix the problem. After consulting
with Dell, a board failure was indicated, and Dell is coming to replace
this.
4) LHO beowulf node 11 reported a hard drive/ide problem. Reseating
the
IDE cables and rebooting has fixed the problem (at least for now).
We'll have to monitor this.
5) Contractors have begun work on sealing the LHO LDAS area in the
staging building. This should be completed by the end of next
week.
6) Submitted LAL function LALFoldAmplitudes to UWM for insertion into
the cvs archive. Continued work towards writing a LDAS DSO for
the
known pulsar search, though now using AEI's LALDeMod functions.
7) Worked with my SURF student on gravity waves from the r-modes.
LDAS LLO
--------
Tried some software out that I thought might be a good
distributed administration tool, however it crashed my system at home.
I will not be investigating this software further. I am
working on
hooking up the ultra 10 formerly known as beowulf to run the tape
library for the coming engineering run. I will name it "tapectl"
and
put it into the host table of dataserver, etc. I have been reading
up
on the cfengine software this week. BigBrother is still functioning
on
dataserver, but I need to resolve the issue of the symbolic links being
overwritten during the LDAS software sync with caltech.
LDAS Caltech
------------
Support for the next release of LDAS involving system reconfigurations.
Testing of automated procedure for installing/configuring Linux desktop
development machines.
Received an additional 90 50GB tapes for HPSS to continue to support
LIGO Engineering run data.
Data Analysis Activities
Shawhan:
I spent a few days developing tools to convert to/from GPS time.
There is now a command-line utility called 'tconvert' which takes
free-form input and prints out the converted time, plus C library
routines to convert between Unix system time and GPS time. Both
of these tools are as bulletproof as I could possibly make them
with regard to automatically becoming aware of future leap seconds
without any human intervention. They have been added to the
"dataflow" package in LIGOtools.
General Computing (Wallace)
MIT:
(Keith)
-Working on LDAS setup.
-Getting quotes for wireless network components in support of the MCD.
-Rebuilt user directories from failed file server disk.
-Working on new disk system for the user home directories.
Livingston:
(Shannon and Tom)
-Ordering a couple of SUNBlade 1000 units to act as servers.
-Working on security monitoring pkg. setups.
-Preparing for the next engineering run.
Hanford:
(Christine)
- Saturday, 7/21/01, the user accounts and e-mail will be unavailable
from about Noon until 4 p.m. PDT in order to move user accounts so
they
are more efficiently using the available disk space.
- Purchased a replacement for the main file server. It will be
here in
about a week. Expect server down time every Saturday for the
next month
until the new server is in place and user accounts are all moved to
final locations.
- Continuing preparations for LSC meeting. Wireless network equipment
has arrived and is being setup in the staging building.
- Lots of time spent on user support this week. Setup a new account
for
a new hire and helped him get started using the GC network computers.
- Continue with getting quotes and purchasing for GC and CDS equipment,
supplies and maintenance contracts.
CIT:
(Wendy)
- Mapped and updated the computer inventory database (still need to
do
Wilson House)
- Helped install memory in Millikan with Mick and Mike
- Attended a LIGO surf lecture
- Toured 40m (and inventoried computers there)
- Installed OS on Sun Machines with Lisa and Mick
- Performed security tests on UNIX machines with Mick
- Updated FAQ on flashing proms for Ultra machines on ligo admin site
- Installed software and mapped drives for users
- Had eye exam
- Worked on installation of the Cadence software (with Lisa)
(Mike)
-Configured one ORiNOCO AP, then learned it had to be configured for
a
different subnet
-Continued to address shutdown problem on newly loaded PC; determined
it
may be necessary to flash the BIOS
-Inventoried 40m facility with Wendy
-Learned about configuring a printer on UNIX (from Lisa)
-Learned how to install Solaris 8 on Ultra 10s (configured for CDS)
-Learned how to flash the PROM on an Ultra 10
-Helped Mike install RAM on 6th floor Sun boxes
-Performed security audit (with Wendy) on all UNIX boxes accepting
an ssh
connection (~60 machines done currently, on 115 and 125 subnets)
-Installed Solaris 8 on alcor
-Did a little research into procmail as a server process, with little
success
(Mike)
-Added more memory to PC^s and sparc stations at Millikan on the 6th
floor,
bringing most of computers up to 512 Mbytes per unit.
-Received new DELL computer for Donna and, had to do a full general
computing software install and load additional drivers for multiple
peripherals. Plus transfer all personal files over to users new computer.
-Received another computer for Cleveland must load all general computing
software and transfer all users data over to new computer.
-Working loading an ANSYS license server. I had to obtain a new license
in
order to register server name PICTOR. I just received the server codes
today but was told to hold off until tomorrow.
-I had to load additional software and OS patches on multiple user
workstations and onsite tech support.
(Barbara)
- Finished latest requested changes to the costbook -- GRA benefits,
estimator comments, layout changes to printed reports, etc. Investigated
and cleanup up some mismatched data. Also installed an
"administrators
view" in MS Access - forms, menus, etc for editing and running printed
reports.
- Worked a bit on automating the web roster
- Made some web site changes -- talks, publications, PAC meeting
announcement.
(Lisa)
- Installed an hp4mv on the 40meter martian network. I still
need to
setup the other computers to print to it.
- Rebuilt rana, the 40m gateway computer. It has a far more restrictive
configuration now than it did before. I'm going to dump it to
tape today.
- Tried to compile aide without success. Luckily the binary is
portable,
so I have Keith's copy installed on rana.
- Did a security overview for the surf students in the 40m.
- Loaded a good portion of the cadence software in preparation for
the new
install. Wendy helped out with this.
- Started teaching Mick and Wendy how to load solaris 8 and how to
flash
the OBP on the ultra10's.
- Made a Ligo t-shirt for Omar.
(Larry)
-Spent some time helping Lisa deal with various Cadence issues.
-Ordered and high-end PC to be used as a license server and analysis
system for some of the new engineering pkgs. being ordered by Dennis
C.
The unit will reside in Dennis Coynes office and will have restricted
access.
-Worked on a number of logistical items for the LSC meeting. It appears
that Christine and company have things well in hand.
-Made a number of updates to the LSC e-mail aliases. Working on changing
the alias file to a system that Rita or another person can maintain
without going through the sysadmin group.
-Started going over the policy statement with Albert and have received
some feed back from him. There are a number of changes to be made.
-Worked a couple of security issues. The spam mail advertising a porn
site
appears to have been sent by someone just sending it to the ligo mailing
list. I just recommended deleting it.
Plugged the sendmail hole on another security incident which Lisa later
handled.
-Worked with Keith at MIT on a number of GC projects as well as assisting
in the LDAS setup.
-Worked a number of procurement issues including tracking down invoices
to
reconcile my p-card.
From: GariLynn Billingsley <Billingsley_G@ligo.caltech.edu>
A 127mm x 54mm c-axis piece of sapphire has been measured in transmission. No evidence was found of striae as seen in all three m-axis pieces we have measured. The processes this piece went through are the same as for the rest of our sapphire samples. This result may eliminate the residual stress explanation for the inhomogeneity we have seen in m-axis sapphire.
We are scheduled to receive an a-axis piece at the end of July.
From: Janeen Romie <jromie2001@yahoo.com>
Supporting GEO personnel in assembling the quad
pendulum prototype.
Working on Advanced LIGO Suspensions cost/schedule package.
From: David Reitze <reitze@phys.ufl.edu>
To: Core Optics WG
Minutes of the Core Optics Telecon, Thursday, July 12, 2001
Caltech: Jordan Camp, Dennis Coyne, GariLynn Billingsley, Ren-Yuan Zhu
MIT: Gregg Harry, Norna Robertson, Dave Ottoway
Stanford: Shiela Rowan, Roger Route, Marty Fejer
Glasgow: Jim Hough
Jordan reporting on Crystal systems.
Crystal Systems has received the new annealing oven, they are working
on it's commissioning.
Ren-Yuan Zhu reporting on his and Jordan's trip to Shanghai Institute
of Optics and fine Mechanics (SIOM)
Background: SIOM has grown 36 samples over 3 years, three of
which were delivered to LIGO. These were C-axis samples that showed
promising absorption. These are grown by the Thermal Gradient Technique
(TGT)
We are now in a second phase with SIOM. They have just entered into a joint venture with a Hong Kong company. Because of this they now have 10 ovens in a new, modern facility, these currently grow 3" sapphire.
They now have the oven which was funded by LIGO, they need to locate
the space for this oven. They will soon try for 32 cm diameter pieces.
They have currently agreed to deliver small samples of sapphire by the
end of July for absorption measurement. They will also deliver 11cm
dia 8 cm thick M-axis sapphire.
SIOM has proposed the use of YAG for LIGO, which they also grow(doped)
by TGT and Czochralski method. They will grow 1cm cube YAG samples
for testing. These should be available by September.
GariLynn reporting on Spot polishing
Goodrich has the removal rate data for m-axis sapphire and can now
proceed with the estimate for spot polishing the large piece. They
expect to have the estimate to us in a couple of weeks. The CSIRO
change order is in place for spot polishing, we are now waiting on delivery
of sapphire from CSI.
Roger reporting on Absorption
There have been no new measurements, Alex is still reconfiguring the
setup. The new post doc is getting some hands-on time with Alex,
so momentum is picking up. Jordan mentions that it would be good
to have the measurement capability at Caltech.
Nothing new with the Hydrogen annealing oven, Roger is waiting for absorption measurements on his last batch.
Q-test substrates
Mindrum expects delivery sometime this week, they are currently a month
behind. They are having trouble getting figure and microroughness
to come in at the same time, and they have broken some pieces. We
have put a duplicate order in with Wave Precision (GO), who has a 12 week
turnaround now.
Jordan, Roger and Shiela plan to meet with Gary DeBell of MLD on Monday the 23 of July to discuss the next coating phase.
Jim Hough asked about the status of getting some SV glass for q-testing.
Jordan reports that Helena has been working on it and that we have some
ordered.
From: Francesco Fidecaro <fidecaro_f@ligo.caltech.edu>
Welcome to Charlotte Py and Mathieu Musso, from Lyon Institut National de Sciences Appliquees (INSA), an Engineering School. They will work on mechanical studies and design.
Alessandro
Should receive his visa, so will be here next week.
Lia
Checked channels on data acquisition board, drawings made, found noises
on LVDT channels. Wrote LabVIEW program to check every channel on DAQ board
and all connections. Wrote MATLAB program to read data and make plot to
study noise. Suspected noise from fan switching on.
Andrea
Working on 40 m. Aligned cavity and pre mode-cleaner. Will start analysing
data reading frames to make first frequency spectra.
Charlotte
Web scanning to look for mechanical and thermal properties of sapphire.
Different answers obtained. looking into Frederic files together with Mathieu.
Mathieu
ANSYS installed and working. Likely to need more powerful computers.
Started with Frederic files. Started studying a flex joint to study first
vibration mode.
Must get CAD program to be coupled with ANSYS, ProEngineer?
Hongo activity Virginio, Akiteru & Florian
Cabling, DSP, ADC, DAC, NIM crate power supply debugging. Intense line
background. 1 accelerometer smoking actuator. Work needed on accelerometer
sensitivity at low frequency. LVDT diagonalization done, actuator diagonalization
still to be done. Entire suspension chain tuned. Software works nicely.
Riccardo
Still in Australia
Francesco
Helping here and there to start activity
With Riccardo back in Europe we'll fix an adequate meeting time
For additional information about this report, contact sanders@ligo.caltech.edu