The Project Control Meeting
Agenda for Monday September 21, 1998 will be:
(Meeting time: 10:30 am Pacific Time)
The seismic support components were delivered to the site this week
and are
now stored in their shipping wrapping in the staging building.
Significant flooding of the access road occured as a result of heavy
rains
last weekend. We took pictures of the flooding and have asked for the
assistance of LSU's Vice Chancellor for Research, Lynn Jelinski, in
approaching the state to insure that we have an all-weather access
road
that will not require repair and maintenance when these rains occur.
She
promised to pursue the matter.
Anthony Rizzi began work this week. He will begin to work with Alex
Marin
to set up the site characterization apparatus here and will act as
liaison
for the seismic site characterization work which is expected to begin
soon.
Draft copies of the CBI poster describing their contribution to LIGO
were
received this week. Full scale versions will be delivered shortly to
the
Livingston and Hanford sites.
Barry and Mark met with Joseph Savoie, chairman of the La State Board
of
Regents, and members of his staff to discuss LIGO outreach programs.
They
are interested in promoting LIGO and would like to visit LIGO in a
few
weeks to explore these opportunities further.
We also met with President Sally Clausen of Southeastern University
and
members of her staff. They are very interested in involving their
undergraduates in activities at the LIGO site, exploring opportunities
for
joint appointments, offering adjunct appointments and teaching
opportunities to members of the LIGO staff, providing infrastructure
to
support SURF programs, and facilitating a liaison with Xavier University
(a
historically African-American university in New Orleans) with which
they
are pursuing the development of a masters program in an area of
engineering. They will also help us to begin contacts with K-12 educators
for classroom visits, field trips, etc.
WBS 1.1.1 Vacuum Equipment(Worden)
1. Gate Valves:
a. WGV11 (Y-end) Complete.
b. WGV12 (Y-mid BT) Complete.
c. WGV17 (Y-end BT) Complete.
d. WGV14 (X-mid) Complete.
e. WGV18 (Y-mid) Ready for in-situ leak test
f. WGV20 (X-end) Complete.
g. WGV16 (X-mid BT) Complete.
h. WGV15 (X-mid) Complete.
i. WGV19 (X-end BT) Complete.
j. WGV3 (LVEA-48) Ready for in-situ leak test.
k. WGV5 (LVEA-44) Waiting for bellows.
l. WGV10 (Y-mid) Waiting for bellows.
m. WGV6 (LVEA-BT) Ready for in-situ leak test.
n. WGV8 (LVEA-BT) Ready for in-situ leak test.
o. WGV1 (LVEA-48) Most work completed, however noise
on actuation
may mean redoing some.
p. WGV13 (X-mid BT) Complete.
q. WGV4 (LVEA-48) Ready for in-situ leak test.
r. WGV7 (LVEA-44) Waiting for bellows.
s. WGV9 (Y-mid) Waiting for bellows and ball screw.
Date: Thu, 17 Sep 1998 08:43:05 -0700 (PDT)
From: Larry Jones <ljones@acrux>
a. Livingston Installation
CBI continues to pump on the Y arm in preparation
for
acceptance testing. Current pressures (torr) are
in the
mid to high E-8 torr range. The modules and test
equipment were nearly ready for an accumulation
"preview"
of the full arm when a small, all-metal valve on
one of
the B hardware sets siezed, requiring replacement.
The
preview accum will now likely take place early next
week.
CBI techs are preparing to locally leak check the
Y arm
midstation valve, at a cost of $3K. A bellows leak
in
this valve can threaten the module acceptance in
Y1
(as also in X1 at Livingston).
One of the turbo carts was found to have shut down
on
9/8, with reason unknown. It restarted with no problems.
The UPS protecting the computers in the data trailer
is
triggering several times per day, even though the
site
power through the new substation appears very steady;
this is not understood.
b. Other Issues: VAT Valve Adjustments
CBI has reached closure with VAT on payment for the
repair of the 10" gate valves at the two sites,
and the
VAT reps will be at Hanford on 9/21 to start repair
work
on those valves. CBI is now working the return of
the two
spare valves to VAT for evaluation/repair.
It's CBI's and VAT's goal to complete the repair
of the
Livingston valves in one trip, starting after CBI
completes Y arm acceptance testing and finishing
before
11/30/98 (assuming that the start date would allow
that).
Date: Thu, 17 Sep 1998 10:37:29 -0500
From: Allen Sibley <sibley@ligo.caltech.edu>
PSI has completed the ramp up and soak of the x arm end station
bake out.
The system is now cooling and the RGA scan is being readied. The y
arm end
station has been fitted with a main turbo and pump down is now underway.
No civil construction report received.
Date: Thu, 17 Sep 1998 20:59:04 -0400
From: David Shoemaker <dhs@ligo.mit.edu>
----------------------------------------------------
DETECTOR GROUP -- Whitcomb/Shoemaker
(WBS 1.2, 1.3)
----------------------------------------------------
40m (Jennifer Logan)
--------------------
We continue to try to understand what is causing the interferometer
to
fall out of lock as we bring it into full alignment. Suspicion
is
resting heavily on the recycling mirror servo. The dynamics of
the
recycling cavity is coming under close investigation as we try to
resolve the issue.
----------------------------------------------
Interferometer Sensing and Control -- M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
ASC/IAS design, fabrication & installation (Mason, McInnis)
-------------------------------------------
A set of drawings documenting viewport locations, optical lever,
camera, and illuminator locations and setup specifications has been
completed. The drawings are preliminary until the naming conventions
of nozzle locations have been finalized. The drawings are D970220-B
shts 1-9.
4 additional grout plates and 2 base plates for the optical levers have
been shipped to Hanford. They are scheduled to arrive on 9/24.
A purchase order has been placed with Velmex for the IOT7 enclosure.
It
is expected to be shipped to us on 10/23.
We have begun preparing a clean room for the assembly of the ISC
tables. It is expected to be ready by 10/1 for start of IOT7
assembly
ASC/WFS fabrication (Smith)
-------------------------------------------
Continue to order and receive parts for the IOT7 table. Working
with
vendors making sure that they have received orders and are able to
ship
on time. So far only 1 PO has been loosed in the shuffle
and is now
resurrected. Delivery of the items is 3 weeks-Oct 8.
Still working optical wedges with Mike Smith.
Have not started the end cap support tables yet.
ASC implementation (Fritschel)
-------------------------------------------
o Measured the first few resonant frequencies of an ISC periscope --
these are welded aluminum structures that will hold two mirrors to
bring the various output beams from the chamber port exits down to
the table height. The first three resonances are at 207 Hz, 254 Hz,
& 551 Hz, so it's nice and stiff.
o Looking for beam position sensors for use in alignment of the
ISC optical tables.
o We tested a Hitachi ccd camera and found it to have much better
1064 nm sensitivity than the standard Sony camera. Some of these
will be ordered for viewing scattered light in places where the
intensity is relatively low.
LSC lock aquisition (Ware)
-------------------------------------------
Using the latest LIGO optical parameters, and incorporating delays
into the system, I've been able to improve the lock acquisition L-
loop to having 30 degrees phase margin, and 10 dB gain margin, with
-130 dB attenuation at the first drumhead ITM mode. In doing
so, the
threshold velocity increased to at least 5 lambda/s (at least for the
ICs I tried). Also started playing with Ray B's STM model, and
experimented with some changes in actuator combinations in SMAC (e.g.,
driving the ITMs instead of the ETMs for L-, driving the BS instead
of
the ITMs for l- as SMAC has historically done).
-------------------------------------------
Lasers and Optics -- J. Camp
(1.2.1.1.2, 1.2.1.1.3, 1.2.1.1.4,1.2.1.1.5)
--------------------------------------------
Prestabilized Laser -- Peter King
--------------------------------------------
- A temporary standard operating procedure (TSOP) permitting the laser
to
operate without the secondary laser area enclosure has been written
and
accepted as satisfactory. The TSOP allows operation of the laser
within
the laser area.
The laser will be operated with all doors at the
back of the
2k IFO IOO/PSL optical table closed.
- A temporary laser area enclosure was constructed that encloses the
2k IFO
IOO/PSL optical table enclosure.
- The PSL instrument rack installation has been completed. Tests
of the
wiring are about to commence.
- The 10-W laser has been turned on.
# DHS: Good News!
- The reference cavity has been assembled.
Input/Output Optics -- Dave Reitze, UF
-----------------------------------------
Installation
Sany Yoshida and Dave Reitze are at Hanford this week processing and
hanging SOS optics. A test stand for balancing the optics has been
set up.
Procurement and Machining
The in-vacuum Faraday isolator mount has been stenciled with its serial
number and will be shipped to Caltech for bakeout along with some remaining
parts for the small optics suspensions. The in-vacuum polarizers
from
Karl Lambrecht are also ready for baking.
The second (spare) 2 km mode cleaner curved mirror from REO came back
defective - small coating defects near the center of the optic, due
to the
use of a teflon mask (aluminum should have been used). Since the
first mode cleaner curved mirror was also coated incorrectly (no
aperture), we are forced to repolish both mirrors and get them recoated.
This will take ~4-6 weeks.
# DHS: Bad News.
Mode Matching Measurement -
New setup with pre-mode cleaner included has been designed and most
of the
mode matching and Guoy phase telescope has been calculated.
High Power Testing -
We tested the performance of a 68.8 MHz electro-optic, phase modulator
(Manufacturer: New Focus). In a modulation index range of 0.1 to 0.7,
we
observed the spectrum using an optical spectrum analyzer. In
the whole
range, the modulator showed the correct spectrum (the modulation
frequency was 68.8 MHz and the spectrum was symmetric around the carrier
frequency).
At a modulation index of 0.4, we measured the residual intensity
modulation caused by angular misalignment among the incident
polarization, the modulator's crystallographic axis and the polarizer's
orientation. We monitored the total intensity by a RF photodetector,
and
the intensity at the modulation frequency by the same RF photodetector
and
a RF spectrum analyzer. When the optics were aligned appropriately,
the
intensity modulation (defined as the ratio of the intensity at the
modulation frequency to the total intensity) was 2e-5.
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
Gari is at Veeco today for re-acceptance testing of the repaired
IR interferometer. (JC)
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
REO Contract - COC's coatings: Four 2ITM's have been coated on both
sides
and will be shipped to Caltech as soon as REO completes final inspection.
(Dale is away at a seminar this week).
Core Optics Support -- Michael Smith
------------------------------------
BEAM-DUMPS:
M. Smith has determined that the rigid mounting brackets that hold
the
horizontal beam-dump support structure to the BSC chamber walls will
fail
in bending if the chamber walls shrink in radius by 0.12 inches, as
was
predicted in worst case by the Hytec FEA study of unbalanced vacuum
loads.
The bracket is being redesigned as a hinge structure, which will provide
ridigity but will tolerate the shrinkage without imparting bending
stresses.
ITM BAFFLE:
A. Rosa is completing the 3D model of the mid-station and end-station
BSC/spools prior to mounting the COC baffle in those locations and
modeling
the ISC optical lever beams.
ETM and PO Telescope-
A contract was let to CC Development for the final mechanical design
of the
ETM and PO telescopes, effective 9/14/98. A kick-off meeting was held
at
CIT on 9/16/98. The completed drawing package is expected the last
week of
October, 1998.
FARADAY ISOLATOR SYSTEM
The specification for the Faraday Isolator assembly has been completed.
VACUUM WINDOW
A procurement package for the vacuum windows has been sent to I. Petrac
for
bid preparation.
MOCK-UP
The SEI table mock-up will be mounted inside the BSC chamber in the
CIT
HAM/BSC mock-up facility prior to simulating the alignment procedure
of the
PO telescopes with the COS alignment beam.
--------------------------
Isolation Group -- M. Fine
--------------------------
Seismic Design (Mike Fine)
--------------------------------------
1. Air Bearing Performance Tests:
The air bearing performance has been under investigation last week.
All
four bearings have been floated under load and are showing signs of
having
some stiction between one or both of the bearings surfaces. One
concern
was with the flatness of the mounting plate. To minimize deformations
in
the air bearing base plate, the bolts were removed between the mounting
plate and the air bearing base. There was no change. Suspicion
was also
placed on the mounting bolts between the crossbeam and the air bearing
ball. The preload from the bolts is enough to cause deformations
of the
ball on the order of the air gap size. These bolts were also
released on
all four bearings. There was some improvement in the performance,
however
the stiction was not suppressed. The latest test was to raise the air
pressure
and determine the point at which there was no stiction. Hytec was able
to
reach 200 psi and there was very slight evidence of stiction in two
of the
bearings. This information has been given to Specialty Components
so that
they can help determine the cause of this problem.
2. Rack Assembly Checkout:
The limit switch cables are made, but Hytec still needs to position
all 16
limit switches in order to make use of these signals. The pneumatic
signals are all functioning properly. The emergency stop buttons are
also
operational. Hytec still needs to hookup bearing pressure LEDs
out at the BSC
pier.
2. Scissors Table Testing
The scissors table static testing has been completed. All of
the data has
been collected and must be analyzed. The report will be written
to outline
the findings of this testing.
Suspension -- (Janeen Hazel/Mark Barton/Mike Fine)
-------------------------------------------------------------------
Janeen is at Hanford this week assisting UF with SOS installation.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Global Diagnostics System (Daniel Sigg)
--------------------------------------
No report this week.
Physics Environment Monitor (Matt Smith for Alex Marin)
-------------------------------------------
John Worden and Stan Whitcomb have installed the first PEM RGA
in the BSC 4 in Washington. They discovered some errors
in the configuration of the RGA connectors. We have contacted
Balzers
and they are sending the correct connectors and cables.
Discussions were held in Livingston for weather and seismic monitor
systems.
Optical Contamination (Daqun Li)
--------------------------------
The ringdown and mode spacing data for cavities 2 (viton) and
3 (empty) are still roughly flat for the fourth week after the
earthquake. Faraday isolators, teflon wires (different type),
and "dirty" aluminum and air-baked steel parts (from Allied) are
planned to be tested next if viton seals and the empty cavity
are determined acceptable by the Vacuum Review Board.
It was found unlikely that we can measure coating absorption at
1 ppm (typical coating absorption for REO coated optics as measured
in VACUUM) in AIR using the mode spacing technique, since the
frequency shift of cavity modes caused by air absorption overwhelms
that by coating absorption (over 100 to 1). However, it is expected
possible to measure the substrate absorption of core optics up to an
accuracy of 20% (~ 5 ppm) substrate absorption (30 ppm, 3 ppm/cm at
an averaged thickness of 10 cm) in AIR with the Loss Scanner.
Working on computer data acquisition hardware and serial communications
for automating the Loss Scanner.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
Suspension
=======================
- 20 SOS controllers are operational
- We will be demonstrating the suspension test stand in Hanford on
Monday
9/21.
ASC/LSC
======================
- The test stand has been put back togehter and we are repeating some
of the
timing tests so that Lori can become familiar with the system.
- The is a meeting in Hanford on 9/21-22 to discuss the architecture
and
implementation of the ISC controls.
- Jay has contacted Artesyn (maker of the baja4700) regarding the problems
associated with the netTask. Preliminary answers from Artesyn indicate
that
it
may not be possible to get rid of the jitter problems without suspending
the
task. This will definitely impact the system architecture.
IOO
======================
- The mode cleaner PZT driver is operational.
-Due to a mishap with the EO Shutter Controller we are now waiting
for two
new high voltage power supplies. They should arrive in about a week.
Two
photodiodes are being completed to send to MIT for assembly on the
optics
table.
Timing System:
======================
The Level 2 GPS clock fanout is stuffed and ready to test. We have
recently
identified the requirements for the clock fanout that will be incorporated
into the Pentek interface. The Pentek ADC/DAC clock comes in on the
same
connector as the input signals for the ADC. We are in the process of
purchasing low loss cables and connectors for the antenna to GPS receiver
connection.
PSL
======================
- The hardware and software for the Hanford PSL is ready for tests.
LA Vacuum
======================
- Vacuum controls for the left end station were successfully tested
with PSI
equipment.
>From: Kris Duncan <kris@ligo.caltech.edu>
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, DC)
Lazzarini started working with Larry Jones to review/analyze the LLO
alignment data vfrom CBI.
Lazzarini completed the GUI front end of the search tool for accessing
the BT Bakeout databases. It needs to be ported from Macintosh OS to
UNIX and to be integrated with the data server R. Williams and B. Sears
are completing.
__Reliability:
The Control and Monitoring System (CM) Reliability Prediction Report
was released through the DCC.
Continued gathering and reading available documentation on the
Integrated Sensing and Control System (ISC) in support of the Fault
Tree/Availability Analysis. Mike Zucker
provided valuable information in response to a request for
information. Mike stated that nearly all the "active" components
are
electronics and software. Mike also stated that a majority of
the
"active" components are within the ISC/CDS portion of the system.
The
exceptions being the optical lever system, the CCD Video Cameras, the
electro-optic shutter and the drivers for the motorized mirrors.
I spoke with Jay Heefner regarding the ASC CDS design presented in the
ASC CDS Conceptual Design Document. According to Jay, the design
presented in the ASC CDS Conceptual Design Document is obsolete.
The
conceptual design presented was based upon the initial ASC/LSC design
approach. The ASC/LSC design was changed subsequent to the ASC
CDS
Conceptual Design Review. The ASC CDS design is currently in-process.
However, Jay informed me that, due to schedule constraints, there will
be no Preliminary Design Review and that they will go straight to a
Final Design Review. This Final Design Review is not scheduled
until
January 1999.
Since the ISC Reliability Prediction Report is scheduled to be
completed prior to January 1, 1999, I plan on continuing the
reliablility analysis on the other ISC areas. I will periodically
meet
with Jay to keep current with the ASC CDS design status. When
it
becomes necessary for me to analyze the ASC CDS design, I will get
the
current design information from Jay. If the information is
preliminary, not published anywhere, I will include it as an appendix
to the report so that the reader will be able to determine what the
design configuration was at the time of the analysis.
__Integrated Layout/Drawings:
SEISMIC BALANCE WEIGHTS
Waiting for quotes from two new vendors.
X-BEAM & Y-BEAM SPOOL BAFFLES
Detail drawings are in process.
__Mock-ups: Nothing to report
ELEVATED PLATFORMS
Sample platform (has extended depth, single technician)
due in
three weeks plus. Also working on a full side kneeling
platform to
evaluate in mock-up area.
1.4.3.3 Modeling & Data Analysis (KB/HY/AL/SA)
Hiro:
* Mechanics module development: All necessary source codes of e2e has
been sent to Cella's machine, and Ed is helping Cella to set up.
Cella
is coming to CIT from October 18 til the end of NSF at Hanford.
As a
member of LIGO modeling group, Cella is attending a meeting at Univ.
of Pisa discussing the modeling/simulation of VIRGO. He will give us
a
report.
* Adlib - single mode field The propagator time step issue has been
resolved. The time step should be shorter than the shortest primitive
cavity (+ 2%). Other validations of various configurations are
keep
going.
* Adlib - multi model field The multi mode field strcuture has been
defined, and various primitive modules have been modified to be
multi-mode savvy. Now the reflection by misaligned mirror is being
implemented.
* Alfi The major rewriting for reboustness is going on.
* Generally, Ed helped to set up the software for the server machines
in
Millikan.
Dave Farnham:
Continuing work on the classes for the light-weight data
format. Error handling has been added as well as support for
vector/matrix tags containing any of the LIGO data types ( REAL_8,
INT_4S, etc. ). The classes can also parse arbitrary tags.
Identified a bug in the new egcs 1.1 compiler when using
templates and exception handling with base classes. A workaround was
found which simply removes the use of templates from the code.
Phil Ehrens:
PE has been working on a TCL parser for LIGO adopted tags that would
support arbitrary parameters but no nesting of tags. This was discussed
with Kent Blackburn and desided that by separating out the parser as
modular library, extensibility to support nesting or other tags could
be easily added in the future.
Kent Blacburn:
Not much to say after being back only a few hours. Met with Phil
and Dave to discuss what they are working on and give some suggestions
on possible approaches to particular software designs. Met with
Ed to catch up on the developments in getting a software development
server on-line in Millikan. The desire is to get netgroups established
for the computers up here as soon as possible. Larry is working this
issue.
Anderson:
Moving offices, and sorting out the necessary network connections.
Work is done on converting one of the SRL machines into a limited
router between LIGO and SRL networks. This connection has been
demonstrated to work at 1MByte/sec (the limit of the SRL 10Mbit/s
network).
Work is progressing on getting a fast reliable connection between SRL
and CACR, and reistablishing the LIGO/CACR(HPSS) ATM network after
the
CACR move.
Sears:
work on bakeout database system:
working on an embedded tclet to enable point and
click
magnification, reduction, and
selection of time range
from plot.
porting bakeout data selection tcl application to
a tclet
to be served from www.ligo.
1.4.4.2 General Computing (LW/TE/SS/BK)
MIT:
Nothing to report.
Hanford:
1. Added a couple more user accounts. Finished making the
.cshrc_global and setup files to be like those at Caltech. Will
start
changing user's .cshrc files to source the global file.
2. Continuing with budget and procurement issues.
Livingston:
1. The new PC's from Gateway are to be shipped Friday.
2. Interview people for a part-time Sys. Admin. position at the
Observatory to replace Mike who is going to start school soon.
Caltech:
1. Barbara K. finished setting up the NT web server and
installed a live version of the DCC search application. Next
step is
to have a few people do some testing.
2. (Barbara K.) Attended a 1-day class in Abobe Photoshop.
3. Moved multiple computers. Most of the moves took place on or to the
third floor of West Bridge. Most of the moves went smoothly.
4. Put in PR's for faster computers to replace the existing mail and
web servers. The Sparc 5's performing those functions are getting to
a
saturation point. We plan on keeping the sparc 5's as backup units
so
they will not be available for GC usage.
5. Had an extensive meeting with our SUN sales rep.. She has promised
to put more effort into resolving the ULTRA 60 issue at Hanford. I
was
also informed that we can now have Solaris for the PC's at no cost.
6. Up to 17 Sun systems have been upgraded to solaris 2.6. Among them
systems previously connected to 125 subnet have been moved over to
115
subnet. Servers like kater, acrux, puma etc. will remain unchanged
until their services are appropriately planned. Some systems are found
to have inadequate hardware resources to be upgraded to 2.6 whereas
some are running applications that are not optimized for 2.6 OS
environment. Never the less, efforts are underway to upgrade most of
the LIGO systems as soon as possible.
7. One PC (pc9) in optics lab has been converted to Windows 95 from
Windows NT and connected to 125 subnet.
8. Necessary paperwork has been done to place order for 50 units of
8mm, 160 meter and 100 units of 8mm, 112 meter Exabyte tapes from CDW.
9. Modifications to user accounts and e-mail changes are still being
performed.
10. Samantha has put in all of the changes, given to her, on the
computer documentation and is continuing her work on getting it in
shape.
11. Working out network issues with other groups here on campus. Most
of the connections we are dealing with are to accommodate people that
have moved from one group to another as well as locations.
Report for three days: There was an overwhelming load of mail, requisitions, invoices, POs, etc., when I returned from vacation that I am still in the process of sorting out. Processed as much of it as I could in such little time and continued to monitor and support the temp.
Irene Baldon
Processed the paper work for 27 trips to various locations. Some were new trips but approximately half were arranged while I was on vacation.
Started working on the ever present backlog of Expense Reports and made a small dent. I should be able to make a considerable dent this coming week.
Performed miscellaneous duties as requested by various members of the LIGO Project here at Caltech, as well as for members of the staffs of each of the two (2) sites.
Prepared and distributed the Weekly Travel/Vacation Itinerary Report for LIGO Staff and Visitors.
Processed Staff Payroll, incorporating various recent changes, new hires, terminations and the processing of Vacation/Sick Leave accounting.
Elizabeth Wood
Worked with HR on several sticky but interesting benefits issues.
Brought John Zweizig into the fold. His office is 358 WB at extension 2486.
For additional information about this report, contact sanders@ligo.caltech.edu