The Project Control Meeting
Agenda for Monday April 13, 1998 will be:
(Meeting time: 10:30 am Pacific Time)
WBS 1.1.1 Vacuum Equipment(Worden)
1. Gate Valves:
During testing(at GNB) after bakeout a GNB valve
apparently lost an
O-ring due to its sticking
to the sealing surface. GNB is reporting that
the groove had been machined "out of tolerance".
The O-ring grooves
are machined in the gate and GNB is machining a
new gate for this
valve. PSI and LIGO QA are investigating this further.
We need
to know the magnitude of the error and need to know
if this is
an isolated case. If our confidence remains low,
the valves already
in the field can be inspected; albeit with some
effort.
GHS note: This is not the only GNB valve problem
noted in this report.
2.All LA chambers are complete through testing.
The MIT chambers are ready for the bake/testing
phase.
3. All LA end station equipment has shipped. Some
pieces
have arrived and are being off-loaded.
4. Installation activities:(Worden reporting for Kyle)
X-arm end station:
This station has a leaky gate valve. PSI has decided
to
delay bake here and move to the corner instead.
They
will bake this end station after the corner volumes
are baked.
X-arm mid station:
The bake here is underway with temperatures ramping up.
Corner Station:
Pirani/cold cathode gauge pairs are being installed.
Misc. electrical work including receptacles, gate
valve controllers, signal cabling etc. is continuing.
Installation of purge air header, vacuum header,
water
and instrument air lines is continuing.
Y-arm mid station:
Cleanup activities have started. The system here
was vented
in order to test the 14" ion pump gate valve. This
valve
is holding correctly. PSI will repeat this test
in the end
station. They are hoping that they incorrectly operated
the valve there when it leaked during vent. All
14" valves
will be tested in this fashion to ensure that the
main
ion pumps do not experience unnecessary vents.
Y-arm end station:
The post bake vacuum results here were slightly better
than
the mid-station. Based on the RGA measurements the
pressure is about 6 x 10(-9) torr with ion pump
and
80K pump online. The recorded values are:
AMU Pressure(torr)
2 4x10(-9)
16 2x10(-11)
18 1x10(-11)
28 9x10(-10)
44 1x10(-10)
The contractual requirement is 2x10(-8) torr total
pressure.
The purge/vent testing has also completed. Results
will be
available in a day or so.
1.1.2 Beam Tube (L. Jones)
a. Tube section fabrication status, Magnolia
Beach shop
(running totals):
Leak Leak
Formed Tested Failures Cleaned Shipped
as of 3/31: 349
329 0 329 270
as of 4/7: 363
343 0 343 286
b. Tube section installation
status (Livingston site):
(running totals):
Inside Leak Leak Final
Welded
Repairs Tested Failures Aligned
as of 3/31*:
267 19 265
0 0
as of 4/7*: 281 19
279 0 0
* Includes gate valves as
the finish "tube sections"
A failure of the field crane
on 4/2 caused the crews to
be sent home early, as no
further progress could be made
until the crane was repaired.
It was repaired prior to
the next work day, 4/6.
This is the reason for the
reduced installation rate
this week.
Pumpdown
of the X arm modules started at 3 pm on 4/7,
reaching approx. 550 torr
by 5 pm, when the pumps were
turned off for the night.
Several shutdowns of the roughing
pump carts occurred on 4/8; these are being investigated.
The mid station gate valve is open, and corner/end
gate valves
are closed; all are locked out & tagged.
BDF air flow performance
since 3/31:
Particulates (0.5u)/cu ft:
29 (max., any day)
Dew Point, degrees F: 0-7
Temperature, degrees F:
66-68
Of the 279 tube sections
installed, 234 have now been covered
with enclosures.
c. A meeting was held between Weiss, Sanders, Stapfer,
Jasnow,
and Jones on three open BT issues with CBI; decisions
reached
were as follows:
1. EQUIPMENT: we will get prices
from CBI on purchasing
the following equipment at the
end of the contract:
GPS equipment and
fixtures (less the fixtures
planned for measuring
through the holes in the
BTE, which are deliverables)
Transformers and related
equipment (less the
four transformers
and circuit panels which
are deliverables)
Helium Mass Spectrometers
2. COST FOR HA LEAK LOCATION:
since most of the cost
for this item was based on the
cost of installing Type
B pump port hardware on each port
of module Y1 and the
original contract called for that
installation on all
modules, this request will be
rejected.
3. LI X ARM ACCUMULATIONS EVERY
2 WEEKS: LIGO will
reimburse CBI a reasonable amount
for making periodic
air signature measurements on
the Livingston X arm,
in order to better understand
the shape of the time-
pressure curve.
d. Planned meetings:
4/16/98: monthly project status review, Livingston site
5/TBD/98: monthly project status review, Livingston site
7/1/98: Completion Review, Livingston site (performed
early due to manpower availability)
1.1.3 & 1.1.4 Beam Tube Enclosure & Civil Construction/Design
and CM
Issues:
>Hanford:The final acceptance test of the vane axial
fans is
scheduled to take place on April 14 &
15, 1998. Paul MacCalden
of Parsons main office will witness testing.
Livingston: HVAC chilled wadter coils/fins
condensation.
Water is blowing off horixantal fins
past collection pans and
on to the floor in the Mechanical Room.
Y
The drain oulet pipe from the bottom pan must
be sloped down to the
outside cleanout with
minimum of 6" effective difference in elevation
to the cleaout. The
6" static differential is needed to overcome
the max. 6" water
col. vacuum presure of the affected building.
Parsons CM is working the drain piping adjustment
with the contractor.
Hanford Construction (Otto Matherny)
Levernier
Consolidated Punch List
Total punch list items remaining- 58
Total Corrected-
35
Total Signed off-
35
OTHER ITEMS
WATER SYSTEM
We have a verbal O.K from the state
Health Department to
install the additional water system.
We are sending the
work package to the potential bidders
but will not sign
a contract until we receive a written
approval.
OPERATION SUPPORT BUILDING
The operations support building 90%
design will be complete
in two weeks.
LVEA FLOOR PAINTING
We received quotes for painting 1200
square feet of the LVEA
floor for $6,865.00. This is too much
money. We will try
a different product.
TELEPHONES
US West submitted an estimate of $59,617.00
to install a
PBX system and 100 telephone instruments.
We are evaluating
the proposal.
Louisiana Construction (Gerry Stapfer)
Hensel Phelps:
Working on punch list. Approximately 20 punch list items are remaining.
Completed Overpass (all, except the railing)
Completed asphalting around the corner station.
Woodrow Wilson:
Started the installation of enclosures on arm-1. set at total of 159
enclosures on this arm.
Completed grouting of enclosures on arm-2
Started the installation of enclosure doors on arm-2
Fire Marshal Inspection:
Listed 17 items for compliance. At this point it appears that we will
not
have any outstanding issues as we can accommodate all of the items.
Issues:
We are scheduling an early "Chip and Seal" completion of the arm-2 service
road to minimize dust contamination of the CBI pump carts and leaktest
equipment. This will require an additional mobilization cost but is
deemed
worth while to minimize potential equipment damage.
Date: Thu, 09 Apr 1998 19:27:41 -0400
From: David Shoemaker <dhs@ligo.mit.edu>
DETECTOR GROUP -- Whitcomb/Shoemaker
(WBS 1.2, 1.3)
----------------------------------------------------
-----------------------------------------------
Implementation Group -- Mark Coles/Fred Raab
-----------------------------------------------
40m (Jennifer Logan)
--------------------
We continued our studies on the power recycled Michelson in particular
trying to find out why the recycling gain appears to be a factor of
~ 2
lower than we expect. This week was spent looking at mode-matching
effects into the PRM. As an aid to our investigation we locked
the
PRM together with one of the arms. We then set the modulation
frequency
such that the first higher order mode sideband would be resonant in
the arm and as such would be anti-resonant in the PRM. To test
this
idea we deliberatley misaligned the recycling mirror and indeed saw
the predicted asymmetry in the sideband heights (as viewed on a tropel)
as the TEM10 sideband became resonant in the arm. Having thus established
the technique we went on to look for a similar effect, with the PRM
fully
aligned, for the LG01. No convincing effect was seen in this
test however
(looking either with the Tropel or with a fast photodiode at the the
modulation frequency). Our studies continue.
Gsaenger have now looked at the Pockel cells that we returned to them.
Their first conclusion was mositure damage, but when questioned further
said that overheating would also produce fogging of the nature that
we observe. They recommend that the crsytals are not allowed
to get
hotter than 50C. Bench tests in air indicated ~ 10F temperature
rise;
of course we would expect this to be higher in vacuum. Dick is
talking
with Gsaenger about the possibility of using an Aluminium substrate
rather than ceramic.
The Lithium Niobate modulator arrived from New-Focus for damage testing
at 514 nm.
----------------------------------------------
Interferometer Sensing and Control -- M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
Interferometer sense/control (Zucker)
-------------------------------------
Preparing for IAS review scheduled for 4/30. Ken and Myron McInnes
are
lining up procurement bids to place orders immediately after FDR (if
approved).
ASC initial alignment (Mason)
----------------------------------------
no report received
LSC design/testing (Fritschel/Mavalvala)
---------------------------------------
LSC Detection Mode Controls:
We have found fixes for most of the numerical instabilities
associated with the very high-order polynomials in the closed
loop response of the mode cleaner frequency output to mode
cleaner length changes and to additive offset of the mode cleaner
error signal. We now have a closed loop Simulink model that is
numerically well-behaved and have designed control loops for two
frequency actuation paths and the L+ path with stable cross-overs
which meets the gain requirements at all frequencies. The l+ loop
still needs some redesign to meet requirements for shot noise leakage
into the frequency/L+ signal.
LSC acquisition controls (Ware)
--------------------------------
Very little positive to report. Trying different solutions to
work
within the actuator limits of the OSEMs and the laser frequency
change. I have found a discrepancy between what SMAC does and
what I
thought it did that requires me to rethink the laser frequency
controller.
LSC closed-loop DSP test (Fritschel/Daw)
----------------------------------------
no report received
-------------------------------------------
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)
--------------------------------------------
10 W Laser Contract -- Jordan Camp
------------------------------------
Nothing to report.
Prestabilized Laser -- Peter King
--------------------------------------------
- The 10-W 126 MOPA #102 laser has been locked to the reference cavity
via
the VME interface using the EPICS control screen. To date this
has been
achieved via manual controls of the control screen. Work is underway
to
automate this process.
- The second 10-W 126 MOPA laser, #103, arrived last week. This
laser is
fitted with different internal mirror mounts and does not suffer the
beam
pointing drift problem encountered with #102. Measurements of
the
free-running intensity noise and beam profile parameters have been
made.
On delivery the output of the laser was 10.9 W.
The intra-MOPA EOM has been installed in #103 and
the laser has
been aligned into the PSL optical setup. It has been locked to
the
reference cavity via the EPICS control screen as well. The software
slow
loop controller, which adjusts the voltage applied to the laser's slow
actuator to keep the fast voltage within a defined range, has been
written
and tested. Preliminary testing indicates that it appears to
function
correctly.
- Update: During a 12 hour run test, the software slow loop controller
kept
the laser locked to the reference cavity. Normally the slow voltage
would
drift overnight causing the laser to lose lock.
- The 126 MOPA #102 laser has been returned to Lightwave Electronics
for a
mirror mount retrofit.
- A problem encountered during monitoring of the power amplifier pump
diode
monitors leading to voltage readings of 0 V over the photodetectors,
which
would indicate that the pump diode failed, has been traced to the pins
of a
crimp connector touching more than one wire. This is on the system
interface cable between the Lightwave Electronics power supply and
the VME
back plane.
- S. Seel has been making time domain measurements of the temperature
of
the PSL reference cavity vacuum chamber. The biggest problem
encountered
so far with this experiment is that the PC taking the data, constantly
hangs under the Windows95 interface for no apparent reason.
Input/Output Optics -- Dave Reitze, UF
-----------------------------------------
IOO - Dave Reitze, UF
The IOO team spent most of the week correcting the Final Design Document
in response to the IOO FDR committee report. Thanks to the committee
for
getting it out so fast.
Procurement -
Generating RFQs for all of the remaining IOO parts.
Bullseye sensor from Advanced Photonix has been shipped and will be
here
for testing on Friday.
GO quotes delivery of mid May for 2 km IOO optics. Working with
REO to
schedule coating runs in June for in vacuum optics (mode cleaner and
steering mirrors have highest priority).
Mechanical -
PSL Periscope revised and submitted to shop for prototyping.
In vacuum non-suspended optics mounts have begun fabrication.
High Power Testing -
Continued making runs of the "real" Faraday temp profile in ASAP. It
is
meeting a few of the correspondence limits but there still is an issue
of
step size along the beam axis which is not resolved.
Began modifying Dennis Coyne's thermal code to include the various layers
of the Faraday.
Talked with manufacturers for vacuum compatible polarizers and stages.
Karl Lambrecht is presently testing Vac-seal (epoxy that meets the
LIGO
vacuum requirements) to make a calcite based cubic polarizer. They
will
also test vac-seal to make a polarizer adaptor that fits to rotary
stages
manufactured by Newport. Newport is checking if they can manufacture
all-metal, grease-free rotation stages for the polarizers and a halfwave
plate. These are the most strong candiates for the time being.
Mode Matching Measurement -
Began sketching out tests for the head boards. Rana will find
out more
detailed info when he visits MIT this weekend.
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
CSIRO expects to deliver 4 BS and 4 2ITMs at the end of May, this fits
well
with our coating schedule. The four beamsplitter substrates are
now being
polished on Teflon, S1 of 2ITM02 and 2ITM03 are now in spec with regard
to
radius.
We have placed a startup order with Veeco, manufacturer of the WYKO
6000
for an interferometer operating at 1.064 micro meters.
This instrument
will be used in characterization of the Core Optics.
Vincent Loriette of VIRGO (working with Claude Boccara) reports absorption
at 1.064 um of the sapphire samples supplied by us to be:
sample n1 : 142+/-15 ppm/cm
sample n2 : 90+/-10 ppm/cm
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
COC coatings: The visit to REO was very positive and they are ready
to do
the job on the schedule that we presented. There were only to major
issues
about our coating specs. The most important is the beamsplitter tolerance
(50/50 +/- 0.5%). To maintain this tolerance requires much development
work
(expensive); +/-1% still requires some test runs, but is easier to
achieve.
The second issue was the tolerance on the AR coating reflectance spec.
for
the Input Test Mass (600 ppm +/-100 ppm). They can achieve, after some
test
runs, probably +300/-100 ppm.), we accepted this change. We should
expect a
proposal and quote from them by the end of next week.
Hanford Lab.: Received the quote for the laminar flow benches and modified
work table/sink. The quote has been sent to D.Cook (Hanford)to place
the
order. Also the water system was defined, and the quote for the unit
was
sent to Hanford to place the order. This water unit requires the RO
system
at Hanford to pre-treat the water.
Caltech Lab. Pasadena: The order for the soft wall clean area and the
working table/sink has been placed. Expect to received the parts by
May 1st.
The remodeling work in the lab. is ongoing. The fixtures for
handling the
parts have been designed.
Core Optics Support -- Michael Smith
------------------------------------
Baffle Calculations:
A more realistic (and less stringent) criterion than the glint criterion
is
being developed to aid in deciding whether annular baffles are needed
to
catch the light which spills around the edges of the arm cavity COCs,
and
the recycling cavity COCs.
COS Viewports and Optical Accessories:
K. Mailand is making progress toward obtaining a quotation from ISI
for a
metal gasket-sealed high quality optical window which meets
the COS window requirements. Samples from several vendors of optical
mounts
for the COS steering mirrors and periscopes on the SEI platforms
are being
evaluated.
PO Telescope:
Dennis R. is making progress toward obtaining a final quotation from
SORL
for the PO Telescope mirrors.
System Engineering:
Ara B. is working with System Engineering on VE naming designations
and
layouts.
-----------------------------
Isolation Group -- M. Fine
(WBS 1.2.1.1.1, 1.2.1.1.8)
-----------------------------
1. Air Bearing Assembly:
The prototype air bearing has been micro-machined and hard coated with
an
aluminum oxide layer ~0.002" thick. The bearing surfaces need
to be lapped
and replicated. The prototype testing has been scheduled for
April 24.
We have been informed that there is the possibility of ~2 - 2.5 weeks
delay
in the delivery of the first 4 bearings. This is a result of
both limited
material supplies and a backlog of work at the machining vendor.
The
material is expected to arrive at the machine shop next week, however
the
backlog at the machine shop is causing some problems. Hytec is
currently
exploring all of the options with Specialty Components to help them
successfully meet the delivery schedule. Specialty Components
expects to
have a response from the machine shop this friday to determine the
expected
delivery of the machined substrates.
2. Coarse Actuator Position Sensor:
Hytec will be ordering a Low-Pass filter module to minimize the
ripple in the LVDT output. This ripple may currently account
for 50-60%
of the noise in the LVDT signal. A 48-hour stability test is currently
underway.
The results will be available next week.
3. Fine Stage Actuator Testing:
Hytec has sent another request for information to PI together with
some
recent test data, asking them to provide with detailed schematics.
Because noise levels are dependent on controller tuning, and the latter
is
dependent on system dynamics, it is becoming clear that only a more
realistic series of tests, with inertial and stiffness loading, will
provide definitive answers. Hytec will be working with Joe Giaime
to define
these tests.
4. Assembly Hardware:
The phase 1 assembly hardware will be shipped out of Los Alamos to
Hanford
this Friday. The shipment will include pier transfer table, pier lifting
jig,
pier adapter plate, drill template, HAM pier centering jig, and guide
bracket.
A detailed account of the shipment will be prepared and e-mailed to
Handford
prior to shipping.
Suspension -- (Janeen Hazel/Mark Barton/Fred Raab/Mike Fine)
------------------------------------------------------------
1. Sensor/Actuator Heads:
36 molybdenum-coated heads have been delivered to CDS, along with enough
LEDs
and photodiodes, for fabrication.
2. Alignment Fixture:
Janeen has received a set of revised alignment fixture drawings from
CDI. She
has contacted a few machine shops to solicit their comments and interests
in
fabricating these parts.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Global Diagnostics System
(Rolf Bork, Paul Govereau, Mark Pratt, David Shoemaker, Daniel Sigg)
--------------------------------------------------------------------
Software development for GDS continues this week. A parameter
file
API and system console are now functional. In support of the
upcoming
PNI/GDS excitation test, PG has written a bare bones interface to pass
interupts and data over reflected memory. MP has begun coding
for GDS
excitation system. Configuration of our development environment
is
underway. We have adopted doc++ as our documentation method and
DS
has created a preliminary GDS web page which points to our software
docs among other things.
Physics Environment Monitor (Alex Marin)
-------------------------------------------
We are continuing to order various PEM subsytems. The first
priority is the equipment to be used for the 1st SEI tests: DAQ and
PC, accelerometers and signal conditioners.
New outdoor temperature sensors has been identified
within the
aproved budget. We are also continuing the evaluation of the PZT
excitation system and the B&K microphones.
Shurov and Sarah are working on the environment
data
collected at the two sites.
Optical Contamination (Daqun Li)
---------------------
Continue to take ringdown and mode spacing data from cavities 1 (loaded
with kapton cables) and 2 (empty).
Continue to install components onto the Core Optics Loss Scanner and
prepare for the bakeout of a third contamination test cavity.
Non-Optical Contamination (Matt Smith)
--------------------------------------
Continued support for the vacuum qualification of SEI first article
components.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
No report received.
1.4.1.2 Project Controls (lindquist)
CHANGE CONTROL (lindquist)
===================================
I have scheduled a meeting of the Change Control Board for Monday,
April 13,
1998 at 2pm PDT. The following Change Requests have been submitted
and will
be addressed:
CR-980007 WBS 1.1.5 - Beam Tube Bake, Adjust Budgets to reflect experience
CR-980008 WBS 1.1.1 - Vacuum Equipment, Miscellaneous Changes
CR-980009 WBS 1.1.1 - Vacuum Equipment Changes, QA, Safety, Floor
Elevation, etc.
CR-980010 WBS 1.1.2 - Beam Tube, Taxes and Module End Conditions
CR-980011 WBS 1.1.5 - Beam Tube Bake, Electrical Power
CR-980012 WBS 1.1.5 - Beam Tube Bake, Leak Detector, Redundant Valves
CR-980013 WBS 1.1.4 - Field Work Directives for LIvingston
CR-980014 WBS 1.1.4 - Field Work Directives for Hanford
Copies of these change requests have been distributed.
PROPERTY MANAGEMENT (chargois)
===================================
No report this week.
DOCUMENT CONTROL CENTER (turner)
===================================
>From: Linda Turner <turner@ligo.caltech.edu>
STATISTICS. Only 25 documents were added to the DCC database
because of Linda's trip to Hanford.
A total of 39 packages were received and distributed. An additional
15
packages were sent out. The DCC processed 75 incoming faxes and
the project transmitted 70 faxes.
HANFORD TRIP. Files pertaining to the Acme contract were reviewed.
All documents were copied which needed to be brought into the DCC
to complete our files on Acme activity. Several file drawers
of various
LIGO documents were also scanned and all appropriate documents not
currently residing in the DCC were flagged for copying and transmittal
to the DCC. A brief overview was given, especially for new hires,
on
the LIGO numbering procedure and the importance of numbering and
submitting to the DCC all documentation pertaining to LIGO.
COST SCHEDULE CONTROL SYSTEMS (akutagawa, duncan, rianda, patlan)
===================================
>From: James Rianda <jrianda@ligo.caltech.edu>
Input Schedule and EV data. Updated the Level 1 Milestones charts.
Produced and distributed a first draft of schedule for Task managers
to
review. Produced and distributed new Estimate-To-Complete
(ETC) work-
sheets. Posted Commitments for February.
[Note: As far as I can tell, we will be ready to review the schedule
status on Monday (including earned value). We are still waiting
for some
Estimate-to-Complete data (including from Project Controls), and we
have
not received actual costs for the end of March from Finance yet. -pel]
>From: Henry Patlan <hpatlan@ligo.caltech.edu>
COBRA:
Automated the posting of commitments in Cobra using the [February]
data
file from accounting. Created a new ETC update worksheet that can be
pro-
duced from Cobra. Created a batch report to produce all of the ETC
work-
sheets. Continued Investigating options on exporting data from Cobra3
to
Cobra2 if necessary.
INTEGRATION SCHEDULE:
Reviewed milestone dates that correspond to milestones on the Source
Data
List. Investigated Project 98's capability to produce meaningful resource
graphs.
SUBCONTRACTS MANAGEMENT (petrac, jasnow)
===================================
>From: irena@ligo.caltech.edu (Irena Petrac)
March Metalfab: PO for Non-vacuum SEI hardware is at NSF for approval.
Veeco: PO for Fizeau Interferometer, a replacement for the Phase Shift
IR Interferometer order, is at NSF for approval.
Phase Shift: PO for IR Interferometer is in the process of being
terminated for default (of Phase Shift). The contract "cancellation
notice," prepared by the Caltech Counsel Office, is in LIGO Project
review.
Univ. of Florida: CO No.4, incorporating IO construction and installation
support effort, is at NSF for approval.
REO: CO No.5, adding tooling required for optics cleaning and coating,
is in Detector Group review. REO's proposal for Producution coating
is
in preparation.
MIT: CO No. 24, alloting FY98 interim funds and extending the PO through
May 31st, is in Project Controls Group review. FY98 MIT
Budget negotia-
tions are ongoing.
Brookfield: First invoice (for $13K) is being returned unpayed, pending
delivery and acceptance of the hardware per PO terms.
>From: Ed Jasnow <jasnow@acrux.ligo.caltech.edu>
Four proposals were received for the beam tube bakeout electrical contract.
These proposals are being reviewed and evaluated.
A request for proposal is being prepared to acquire a contractor to
provide
liquid nitrogen for the Livingston site. First deliveries are
anticipated
for June 1.
Modifications have been issued to the Levernier, Hensel-Phelps, and
Acme
Construction contracts to cover field work directives issued by the
site
managers.
A request for proposal is being prepared to acquire a contractor to
make
modifications to the water system at Hanford. These modifications
have
been approved verbally by the State of Washington, but not yet in writing.
This contract will not be awarded until that written approval has been
received.
A response is being prepared to CBI's request for additional funds related
to extra work performed concerning leak location on the Y arm at Hanford.
The amount being requested is $169,000. This request will be
rejected.
>From: Bill Althouse <althouse_w@ligo.caltech.edu>
TECHNICAL CONFIGURATION (Althouse)
===================================
Nothing to report.
1.4.2.1 Quality Assurance (tyler)
>From: "William H. Tyler" <tyler_w@ligo.caltech.edu>
LIGO QA continued editing and review of site operational procedures.
LIGO QA (R. Vincent) was notified by GNB of an additional delay in
conducting a gate valve cycle test due to an apparent hardware discrepancy
that had not been detected until this week. R. Vincent is at
GNB today to
determine more about this latest prvblem. He will also inspect hardware
as
required and sort through GNB's documentation to ascertain if other
already
delivered gate valves may have the same dicrepancy. Mr.
Vincent will
provide a verbal status report today to J. Worden and W. Tyler of his
findings at GNB.
[I neglected to include the following in last week's status report and
appologize! -pel]
1.4.2.2 LIGO Safety (zydowicz)
>From: "michael p. zydowicz" <michael.p.zydowicz@jpl.nasa.gov>
The LIGO safety engineer attended the Process Systems International
Louisiana Site Vacuum Equipment Installation Readiness Review at Hanford
on March 25. Instead of hiring a contractor to install the Louisiana
equip-
ment as they did in Hanford, PSI plans on installing the LA equipment
themselves. They have a facility in LA that can provide riggers and
millwrights for the installation.
They presented a comprehensive plan for the installation, including
a
detailed schedule that showed the installation should be complete by
Dec.
1, 1998. They plan on taking the Hanford PSI employees and also selected
Apollo personnel to LA to oversee the work.
Date: Thu, 9 Apr 1998 16:57:40 -0700
From: lazz@ligo.caltech.edu (Albert Lazzarini)
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, BB, CC, JK, DC)
__System Engineering:
WA IFO Cable Tray Specification
Bill Baldwin is gathering information for writing a Specification for
the
cable tray installation at LHO. He is investigating practical
routes under
the Vertex BSC chambers. He has asked John Worden to make electronic
photos of the current installations in those areas to help visualize
them.
Naming Conventions Document
Bill Baldwin has asked Larry Jones to obtain CBI's nomenclature for
the
RGAs to be used on the Beam Tube. Ara Bedalian is providing drawings
of
the Vacuum Equipment to help explain the naming conventions proposed.
__Analyses:
There is an _APPARENT_ .018m shortfall in the vertex-to-X arm BTVE
INTERFACE distance: instead of it being 46.000m, Allen Sibley reports
that it appears to be 45.982m. I write _APPARENT_ because not all the
facts are yet known(to me). I suggested follow-up surveying to
ascertain whether the BTVE5 (Xarm) interface is the problem. In the
meantime data provided by CB&I indicate that the error may be due
to a
transverse error(+.018 towards the +X direction) in placement of the
Y
arm BTVE1 interface marker. This was originally discounted as a
possible cause for the error because SJB had asserted that the Y arm
benchmark was properly placed based on some closure tests they had
performed as soon as the discrepancy had been identified. This
latest
information is being reviewed by SJB. There is no expected impact from
this discrepancy, as a satisfactory work-around has been identifed
for
either outcome.
Prompted by discussion with Rai, I looked into whether 60Hz motion
observed on the BT (Rai's data indicate that it is true motion, not
EMI
pickup) might be due to I x B coupling between 60Hz currents induced
in
the BT from ambient EMFs and the earth's static field of ~0.5 Gauss.
BT
dynamics were modeled using the reported BT resonance frequencies and
a
beam model for stiffness to oscillation was used to estimate the
effective mode mass for the lowest frequency mode. This mechanism seems
unlikely for two reasons: (i) the effect has an acceleration-per-ampere
transfer function of order 10 micro-g/ampere => too much current flow
would be required for this to be a likely cause: a test which suggests
itself is to try to measure BT currents directly; (ii) the effect would
be
more anisotropic than observed (having mainly a transverse, horizontal
component).
__Reliability:
Initial draft of PEM and COC sections of LIGO Maintenance Plan are
undergoing review by Lazzarini.
Spares and maintenance data is currently being collected for the SUS
and
VE in support of the maintenance plan. Spares and maintenance
data
collection will begin next week for the various CDS subsystems.
__Integrated Layout/Drawings:
Completed LOS1 drawing revisions and filed in DCC. Currently working
on other
LOS drawings to prepare for release.
__Mock-ups: Nothing to report
__BT Bake-Out: reported elsewhere
1.4.3.3 Modeling & Data Analysis (KB/HY/AL)
The decomposition matrix coding is keep going. The matrix and vector
classes are defined for it. Vector class is there for temporary, easy
for debugging/coding purpose, and will be replaced by either stl vector
or by adlib vector class. Matrixes for tilt and displacement have been
calculated. Various mode options, use TEM_nm with n+m=0, n+m=1, n+m=2,
n+m=3 and arbitrary, will be supported and can be easily switched.
Soumya gave a summary talk about his modeling of SEI/SUS sub systems.
His scheme uses Green's function, and, including wire and test mass
motions, the entire system can be expressed by a linear matirx. This
matirx represents the relations among forces, external as well as
internal. Green's function is calculated for each sub component
of the
system, while this matrix should be constructed from the whole
sturcture of the subsystem. The matirx calculation will need to be
done
very carefully, because strong cancelation among elements is expected,
i.e., normal 32 or 64 bit float/double may not be enough, according
to
Andrea.
The user IO part of the code is beging developed. One issue is to
design a API for user IO, so that the same program can issue GUI when
linked with proper libraries, while will use line mode interface
otherwise. The whole purpose is to make the interface user friendly
in
many places as possible, not only limiting to alfi system designer.
Alfi has several new features added. One is the search capability,
which enables you to pick up modules by name and type. Another is the
popup menu in the module window showing the enclosing windows. These
are the key features missing in most of the programs offering iconinc
interface, and are crucial to handle complex systems. File saving has
been modified so that the data file would not be corrupted when the
program crahses during saving data.
The transition to egcs 1.0.2 has been almost done. Some of the e2e cvs
depositry are not yet ready, but codes can be compiled using egcs g++.
Complex class is fixed, and we are switching to the standard complex
class.
We started evaluating Kai's C++ compiler. which has very good
reputation. It is closer to ANSI standard, has better template
handling, and can run faster. There was almost no compatibility problem
compiling the code. Next week, we will compare the speed of the
simulation between egcs g++ and Kai C++.
Writing documentation, code cleanup for it, and example codes for it,
are going on, on, on...
Kent is still on jury duty.
We had a meeting of principals responsible for delivery of LDAS
components to continue working the schedule/tasks/manpower issues.
Stuart Anderson will be representing LIGO in an upcoming meeting a FNAL
on
(mass)data storage systems, such as the IBM HPSS.
Due to some serious LIGO network problems I have not been able to
progress very far on the 40m to HPSS testing. Larry just moved my home
directory from manx to sirius (as seen by the 40m machines) which works
around the problem I was having. However, now there is a problem
with
the other end of the ATM network. This time it is not an HPSS
issue,
but somehow I have wedged the ATM interface on the RS6000 HPSS server
so I cannot get data into HPSS over ATM from any source.
At least I am back to the point of getting 100Mbit/s from 40m to my
desktop machine.
In a slightly related project, I have brought up a 300MHz Ultra30 in
the radio lab that will be hosting 6 of the new fast Seagate9 GB drives
on multiple SCSI busses as part of a 60MByte/s continuous disk I/O
test
for a radio pulsar instrument. One of the tests I plan to run
on this
machine is to benchmark how fast software RAID can work on a modern
machine, which may be of some interest to LIGO as one of the cheap
alternatives to a large network attached filesystem.
Lazzarini met (telephonically speaking) with Jack Donnegan of SDSC.
he
is in charge of network connectivity at SDSC. Jack is ready to help
conduct connection throughput tests for the T1 link to Hanford as soon
as we gain access to ESnet at Hanford. Jack also discussed an impending
need by SDSC to make use of ESnet to shuffle biological sciences data
from Rutgers University. They would like to use Esnet as it is the
pathway common to both institutions at the present time. They, too,
have received negative feedback from DOE and he wanted to know about
our experiences with this matter. He would like to cite LIGO as a
precedent. Lazzarini urged him to talk to NSF (G. Strawn) about the
matter.
COLLABORATIVE RESEARCH
(LS Finn, Mohanty, Mukherjee, Romano) No report received
Theoretical Modeling : Janet Houser <jhouser@cfa.harvard.edu or janet@ligo.mit.edu>
The core instability simulations are almost completed. Currently I am
working on analyzing the
data from the models.
Once the data has been processed, I will begin the binary coalescence
simulations.
1.4.4.2 General Computing (LW/TE)
MIT:
1. Installed IDEAS Master Series Version 6.
Hanford:
Nothing new to report.
Livingston:
1. Another printer and scanner has been ordered for the location.
CIT:
SURESH MAN SINGH HAS ARRIVED AS LARRY'S ASSISTANT
ADMINISTRATOR.
LARRY HAS PROMPTLY PUT HIM TO WORK ON HIS TO-DO
LIST OF 10^N (N>>1) ITEMS. LET'S WELCOME SURESH TO LIGO.
1. Added multiple user accounts in preparation for new people arriving.
2. Moved multiple PC's and workstations to new locations.
3. Worked on getting the tape robot back to working order. One of the
tape
drives will be sent in for replacement. A good possibility that both
tape drives
are bad but one works well enough to get the daily backups done.
4. Barbara finished changes to EPICS CDS database and is testing/preparing
documentation on importing.
5. Tracking down multiple orders. It appears things are going through
the CIT
system at a very slow pace. PCs for Livingston along with workstation
orders
for both observatories and the network hardware order for Hanford have
not
arrived. We are also checking on some s/w orders that have been placed
some time
ago that should have been delivered by now.
6. Working on updating the Web pages for the internal GC information.
7. Moved multiple accounts and data associated to accommodate users
needs.
Irene Baldon:
Date: Thu, 09 Apr 1998 07:42:38 -0700
From: Irene Baldon <baldon@ligo.caltech.edu>
Arranged and processed the paper work for 8 trips. Continued to
work on arrangements for the upcoming GWIC/PAC4 meetings to be
held in Livingston, LA, in April. Worked on the ever present
backlog
of Expense Reports.
Performed miscellaneous duties as requested by various members of
the LIGO Project here at Caltech as well as members of the staff of
each of the two (2) sites. Assisted wherever possible in Beth's
absence and the arrival of Liz Wood.
Prepared and distributed the Weekly Travel/Vacation Itinerary Report
for LIGO Staff and Visitors.
Processed Hourly Payroll, incorporating various recent changes, new
hires
and the processing of Vacation/Sick Leave accounting.
Rita Torres:
Date: Thu, 9 Apr 1998 10:36:56 -0700
From: Rita Torres <torres@ligo.caltech.edu>
Fast a furious activity in preparing the following three procurements
for NSF
approval. For I. Petrac did change order No. 4 for University
of Florida,
PO PC265792 with March Metalfab (SEI Non-vac H/W), and PO PC266466
with Veeco Corporation (WYKO 6k Fizeau Interf.). The respective
SOWs
and procurement justifications needed preparation.
For I. Petrac did change order No. 5 to Research Electro-Optics.
With B. Tyler did revisions/edits to Beam Tube Safety Procedures M980054
& M980042.
Distributed: Material for CCB of 4/13/98, change order No. 3 to
Watt
Insulation,
Veeco Corp., change order No. 3 to Acme, change order No. 11
& 12
to Levernier (civil construction), .
INFORMATION *** Electronic Purchase Requisition ***
The CIT PR/PO form in FrameMaker is available at
torres\LGOcitPO; click in the boxes and type. Tina
Lowenthal found the form acceptable. We can use
either the typed form, or this electronic version.
I welcome comments.
Established signature requirements and routing
procedure still apply.
Dorothy Lloyd:
No report received.
===================================================
LIGO Hanford Observatory (LHO) Operations (4/9/98)
(R. Savage for F. Raab)
===================================================
GENERAL ITEMS:
Laoratory preparations:(from D. Cook) The new door between the Optics
Lab
and the Vacuum Prep. and Assy. Area has been installed. The exhaust
hoods
now have water and power. The exhaust pipe has not yet been hooked
up. The
air return damper in the Vac. Prep. and Assembly area is framed and
sheet
rock wrapped. Caulking of gaps, seams and wall feed-throughs is underway.
The cove base should be installed and walls ready for painting by Monday.
Cleaning of the labs will take place shortly there after.
The rigging for the PSL/IOO optical tables is in and we are ready to
transfer the table for the 2k interferometer over the beam manifold.
The
enclosure for the laser should ship with our transverse flow benches
and
table around 4/28/98. Lee Cardenas is on line
to assemble it after it arrives
Eye exams are being scheduled on a regular basis and the first prescription
special safety glasses should be here around the 15th of this month.
Lab supplies continue to arrive.
C. Gray finished setting up the summer intern room, including set up
one of
the recently-purchased PCs.
BEAM TUBE BAKE-OUT (Mark Lubinski, Mark Guenther, Kerry Stiff, Ron Brady):
Electrical Design: Bids for the Electrical Contractor on site work were
turned in 4/6/98. A review and analysis of these bids is currently
in
progress.
Bake Out Blankets and Control System: The blankets and the control system
equipment for them continues to arrive on site.
Data Acquisition System for Bake Out: Construction of the I/O drop boxes
has begun. Software refinement is in progress and screen revision
continues.
HAM SEI FIRST ARTICLE TEST (Corey Gray and Rick Savage)
C.G. organized and cleaned the loading areas at the corner station for
cleaning work on the support piers. The first of eight piers
has been
successfully cleaned.
C.G. and R.S. participated in the weekly HAM SEI integration meeting
and
are working several actions items assigned during the meeting.
C.G. has
cleared the first article test area in the LVEA (near where HAM 13
was
installed) in preparation for the testing.
For additional information about this report, contact sanders@ligo.caltech.edu