The Project Control Meeting
Agenda for Monday April 6, 1998 will be:
(Meeting time: 10:30 am Pacific Time)
Summary Comments by the NSF Review Committee:
1. LIGO is to be commended for the management
of the civil construction and
the construction of the large vacuum system.
The Hanford Beam Tube achieved
a pre-baked vacuumm of 2x10-7 Torr.
2. Procurement and evaluation of the detector
system components are on the
critical path. Of particular concern is
the SEI which must be in place
before integration can begin. LIGO must
be particularly vigilant in
managing these procurement activities to
limit schedule delays.
3. The integration of the detector systems
is well planned, but the start
of installation is critically dependent
on 2. above.
4. Commissioning of the interferometer is well thought out.
5. Initial operations planning is at an
early stage. The transition from
construction to operation in terms of personnel
has been well planned.
6. There is little or no schedule contingency
left for completion of the
LIGO Construction Project. The Detector
System has the largest remaining
cost contingency. Among potential calls
on contingency, labor cost
resulting from schedule slippage is the
largest component. LIGO management
must make every effort to avoid schedule
slippage.
7. We believe the LIGO Construction Project
can be completed within the
current budget.
8. The proposed operating budget appears
to be at an appropriate level to
achieve the design sensitivity as scheduled.
WBS 1.1.1 Vacuum Equipment
Installation activities:(K. Ryan)
X-arm end station:
The pirani/cold cathode gauge pair was installed
on the BT
(X-2 port #9). PSI found a leaky 10" gate
valve on the VE
during their general VE leak testing. It was
replaced.
X-arm mid station:
All of the required bake blankets have been transported
to
the X-arm mid station. 60% of them have been
installed on
the VE. The VE has passed PSI's leak checks.
Corner Station:
Misc. cable tray/piping installation continues.
There are
still a few annulus piping fixtures which need to
be mounted.
Apollo is sweeping the floor and doing general cleanup.
Y-arm mid station:
No activity to report.
Y-arm end station:
The bakeout of the VE is complete, all of the blankets
have
been removed from the VE and moved to another building.
PSI
is waiting word from LIGO to begin the 24 hr. purge
of the VE
which is to be followed by the 100 hr. pumpdown
and RGA scan.
Livingston Installation (A. Sibley)
Dave Evers of PSI is now present at the Livingston site. He
has started a crew setting the initial alignment at the right
end station. Equipment for Livingston will begin to arrive Mon.
4/6 and placed beginning in the right end station. There are
still some problems with the corner station monuments that SJB
is continuing to work, but no impact on PSI is anticipated.
Work has begun on the new LN2 tank pads and will be complete early
next week, much in advance of PSI needs.
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 3/24: 340
316 0 315 254
as of 3/31: 349
329 0 329 270
b. Tube section installation
status (Livingston site):
(running totals):
Inside Leak Leak Final
Welded
Repairs Tested Failures Aligned
as of 3/24*:
251 19 249
0 0
as of 3/31*:
267 19 265
0 0
* Includes gate valves as
the finish "tube sections"
Pumpdown for the X arm modules
is now scheduled for the
week of 4/5, due to delays
sealing leaks in the port
connections.
BDF air flow performance
since 3/24:
Particulates (0.5u)/cu ft:
28 (max., any day)
Dew Point, degrees F: 1-8
Temperature, degrees F:
54-62
Of the 265 tube sections
installed, 200 have now been covered
with enclosures.
c. 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
(Fred Asiri)
1. Only two Request for Informations are open one
for each site.
Issues:
Hanford: Shannon & Wilson (Fiels Q/A Contractor)
has inspected
the vibration isolations
and seismic restraints for the Vane Axial
Fans. The inspection report has been issued
to the contractor.
Correction of minor deficiencies associated
with the vibration
isolators and seismic restraints will commence
next week. The
final acceptance test of the vane axial fans
is scheduled fo start
on April 14, 1998.
As builts mechanical and electrical marked-up
drawings has been
submitted by the subcontractor to Parsons
main office. Parsons
main office is proceeding with incorporation
of the as-built data.
Final as-builts for mechanical and electrical
will be issued by end
of April. Additional as builts for Architectural,
civil and structural
are due in May.
Modification to Levernier's contract was issued
in amount of
$148K to cover for the approved Field Work
Directives.
Livingston: Water System Integration based
on Landis & Staefa system
proposal has been approved and released for
implementation.
Modification to Hensel Phelps' contract was
issued in amount of
$242K to cover for the approved Field Work
Directives.
Hanford Construction (Otto Matherny): no report due to travel
Livingston Construction (Gerry Stapfer): no report due to travel
Date: Thu, 02 Apr 1998 16:18:49 -0500
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)
--------------------
This past week we made a couple of attempts to measure the recycling
cavity length. The results were rather inconclusive probably
indicating that the cavity length and modulation frequency are close
to
being matched - only if they are mismatched by some reasonable
amount
would we be able to monitor any real change in the power recycled
Michelson (PRM) as we sweep the modulation frequency.
Our efforts have thus switched over to looking at another couple of
effects we observe in the PRM. The first being that the recycling
factor we observe for the sidebands is smaller than we expect by a
factor of ~ 2. The second effect is that we often see asymmetric
sidebands at the dark port of the PRM i.e. there is more power in one
sideband than the other. When we try to equalise the sidebands
by
injecting a DC offset into the beamsplitter loop we do indeed see the
side bands becoming equal height and the carrier being nulled out but
in the course of doing so the sideband which was larger becomes
smaller. Calculation would indicate that when the carrier is
nulled
and the sidebands are the same height they should be maximised.
This
effect appeared to be even more pronounced when the PRM was somewhat
misaligned and thus we are considering possible mode matching effects.
----------------------------------------------
Interferometer Sensing and Control -- P Fritschel for M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
ASC Initial Alignment (K.Mason)
===============================
All detail and assembly drawings are being finished for final design
review. Many of the machined drawings were sent out for quote. Reviewed
assembly and alignment procedures with Bernie Weinstein of Hytec of
their SEI equipment. Myron is contacting autocollimator suppliers to
find someone who will supply an electronic autocollimator with a 980nm
laser diode.
Lock Acquisition (B Ware)
=========================
Continued to design controllers for lock acquisition, tried to
make LA work within the physical limitations of the available
actuators. Added a controller for the L+ loop to lessen demands
on
other loops. In order to do this, I had to make some major
modifications to Lisa's design software, which didn't allow me to look
at the loop gain for this loop. Looks promising, but I'm trying
to
track down an instability which is causing me to lose lock.
Phase Noise Interferometer (P Fritschel/H Rong/E Daw)
=====================================================
o Found that one of the STACIS feet supporting the recycling mirror
table was oscillating in the horizontal loops. We turned down the
gain in these loops, which fixed the problem. Hopefully this will
make the interferometer more stable.
o Designed the whitening/anti-aliasing (pre-ADC) and unwhitening
(past-DAC) filters for the digital loop test. Ralph has nearly
completed building the former.
o Ed has been making more tests of the DAC section of the Pentek;
noise at the DAC output is about 8 uV/rtHz, consistent with Jay's
measurements on previous boards..
Lasers and Optics -- Jordan Camp
(WBS 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
------------------------------------
The 2nd LW deliverable laser has been received at Caltech. The accompanying
test report meets basically all the target specs, including the slow
beam
drift which was solved by the change in mirror mounts. The 1st deliverable
has been shipped back to upgrade its mirror mounts.
Prestabilized Laser -- Peter King
--------------------------------------------
- D. Barker and C. Patton have been debugging the VME interface to the
PSL
from Hanford. This has included checks of the hardware, VME bus
and EPICS
records of the PSL electronics rack.
- R. Abbott has been tracking down some problems with interfacing with
the
PSL electronics. This has included tracing all the wire connections
from
the VME backplane system interface to the cables leading to the various
VME
modules in the rack. One such problem was found to be a soldering
fleck on
the frequency stabilization servo card's slow actuator output.
- R. Abbott, D. Barker and C. Patton have been debugging the various
signals to the frequency stabilization servo EPICS screen. Despite
correct
EPICS record entries the values displayed on the monitor did not reflect
the values measured with a multimeter. After trying to correct
for the
problem with CALC records, it was found that the problem was that ESLO
was
not correctly calculated upon initialization. A manual fix was
employed to
get around the problem until such time as the software be patched.
Various
lessons about IOC records have been learnt in the meanwhile.
- R. Abbott's magic mouse hand has cajoled the PSL to lock to the reference
cavity via the VME interface.
- S. Seel continues to make long term measurements of the temperature
stabilization servo used on the reference cavity vacuum chamber.
Both
closed and open loop transfer functions have been obtained.
- D. Barker and C. Patton have found the errant problem with the VMIC
3123
driver's initialization code. A problem that did not manifest
itself if
the IOC controller used was a Baja unit. The PSL has a 162-333
IOC controller.
EPICS has been rebuilt as a result.
- The IOO/PSL optical tables have arrived at the Hanford site.
Input/Output Optics -- Dave Reitze, UF
-----------------------------------------
The Ufl. group has started fabrication. Weekly reports of this phase
will start next week. (JC)
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
Three of the Heraeus 311 (Beamsplitter) witness samples were sent to
Roger
Route at Stanford for absorption testing. These have also been
measured at
Claude Boccara's lab with their new absorption measurement setup.
We continue to explore options for surface measurement of coated optics
at
1064 nm which will support the original COC delivery schedule.
Brian Loucks has been advised of a possible change in the tooling for
the
IR interferometer. There is currently no negative schedule impact
on the
tooling contract from the delay of the IR interferometer.
Chris Evans of NIST reports that the apparent increase in spherical
abberation seen in the measurement of Pathfinder pieces after coating
is
indeed real. He has measured one of the pieces off axis where
the original
spherical abberation then appears as coma in the decomposition of terms.
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
REO contract: Received the quotation for the COC's coating tooling;
includes: base tooling and coating tooling for each COC plus work supplies.
Sent the coating specs. to REO for their review so, by the time we
visit, we
can firmly define the coating parameters for all COC's.
Caltech cleaning lab.: We defined the cleaning lab. lay-out. Generated
a
work schedule to achieve completion. Met with 2 vendors for bids to
purchase
a clean room station and a customized work bench with sink. Delivery
times
are about 4-6 weeks.
Hanford Lab.:Bids on one standard, and on one customized laminar flow
bench
are expected by the end of the this week (4/3/98).
Core Optics Support -- Michael Smith
------------------------------------
2K Fold Mirror Beam-dump:
A pair of beam-dumps is needed to catch the light transmitted through
each fold mirror in the 2K IFO. The beam-dumps will be mounted to the
vacuum housings in BSC7 and BSC8.
COC Annular Baffles:
SUS mounted, AR-coated, black glass baffles to catch the light
spilling around the COC from the arm cavity beam are under
consideration.
Cryopump baffles:
The cryopump baffles closest to the COC mirrors are found to be
needed based on an analysis using the scattering data
from Pathfinder sample CSIRO S/N 2, and cryopump retroreflection
of the incident light, which is assumed to be a worst case.
Baffle Calculations:
A white paper describing the various baffle requirements is
being completed by Mike S. and will be available shortly for those
interested.
COS Viewports and Optical Accessories
K. Mailand is reviewing some preliminary design data from ISI for a
metal
gasket-sealed high quality optical window which may meet the COS window
requirements. Quotes for fabricating the windows have been received.
A
vendor list is being developed for procuring vacuum compatible optical
mounts for the COS steering mirrors and periscopes on the SEI
platforms.
PO Telescope
Dennis R. is reviewing a quotation from SORL for the PO Telescope
mirrors.
-----------------------------
Isolation Group -- M. Fine
(WBS 1.2.1.1.1, 1.2.1.1.8)
-----------------------------
Seismic Design (Mike Fine)
----------------------------------
1. Air Bearing Assembly:
The air bearing assembly is on schedule. Specialty Components has the
1st
article substrates and is working on micro-machining the surface this
week.
The scheduled delivery of the 1st article air bearings remains unchanged
(at the end of May).
2. In-Vacuum Aluminum Hardware:
Final weld configuration changes have been released to Allied this
week.
The full production of the 1st article hardware is underway.
The Ham
hardware is due to be finished at the end of April.
3. PZT Testing:
Hytec has received feedback from PI on the noise issues. They have
given
Hytec some info on retuning the 100Hz-strain gage filter. Joe Giaime
was at
Hytec this Thursday and Friday, working with Hytec on this. The calculation
of the transmitted noise from the PZT to the optics shows that the
noise is
in the same magnitude as the residual seismic noise at the test mass,
making
the PZT (with all factory settings) borderline acceptable. With a modified
filter (with 15 Hz cutoff), noise above 15 Hz is clearly reduced but
there
is an increase in low frequency noise that cancels the benefits. Further
investigations into the filter design may improve this.
4. Assembly Hardware:
The phase I hardware will be ready for delivery next week. Phase II
hardware
is being fabricated; the delivery date for these hardware is mid April.
Phase III hardware has been broken up into smaller assemblies.
The work on
the first assembly (bellows clamp) should be released for fabrication
by
late next week.
5. Installation BSC at Hytec:
The installation of the BSC hardware started last week. Hytec has now
finished the installation of the tank, the grout plates and the piers.
Suspension -- (Janeen Hazel/Mark Barton/Fred Raab/Mike Fine)
------------------------------------------------------------
1. Sensor/Actuator Heads:
Precision Technology has been selected for the fabrication of the
production sensor/actuator heads. The PO will soon be placed,
which will call for delivery in 4-5 weeks.
2. Alignment Fixtures:
The fab drawings for the lift table, entry tables and the support beam
have been received from CDI, and are currently being reviewed by
Janeen and Ken.
3. Assembly Fixture:
Schober's is on schedule with the fabrication. First articles are
due April 15th.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Physics Environment Monitor (Alex Marin)
-------------------------------------------
We received 5 PZT shakers and their drivers. A small test
bench is now made and we are testing their characteristics using
few accelerometers. We are continue to work towards the optimization
of the external magnetometer parameters (coils) as well as the
magnetic excitation system.
One general issue which was under discussion last week (mainly
due to John H. questions on reliability) is the periodic tests of
various components performances. We are in the process to write a
plan of testing and calibration (using cross checks, the PEM cart
and its supply of sensors, and in the future, using the diagnostics
for a comprehensive survey).
Purchase orders for a significant fraction of the PEM equipment were issued.
Optical Contamination (Daqun Li)
---------------------
Cavity two (now unloaded) has been locked continuously with a new set
of low loss mirrors. The ringdown and mode spacing data suggest
the
coatings of the new mirrors are clean (67ppm total loss per mirror
and
~ 1ppm absorption per cavity). This cavity is expected to run
for a
few more weeks for requalification before reloading the teflon wires
back into the cavity spacier;
J.Camp and D.Li have set up a temperature stabilization system onto
the outer chamber of cavity one (loaded with kapton cables).
As a
result, the chamber temperature has been stabilized around half a
degree, similar to the second cavity setup. This should make
the
cavity insensitive to room temperature drifts and therefore remove
the need for temperature correction of its ringdown data;
Preparation for a vacuum bakeout of a 3rd contamination cavity is
underway. We have received a new npro laser for this setup.
Optical installation of the Core Optics Loss Scanner, a new name
given to the RTS Scanner, has been started. I am just gathering
and
ordering all the final components before shining a first light (not
onto the big core optics but just small flat optics of 3" dia to first
make sure everything works).
Non-Optical Contamination (Matt Smith)
--------------------------------------
We are proceeding with the support of the Seismic Hanford on-site vacuum
testing.
The MIT RGA was returned to Pfeiffer, on Monday, for refurbishment in
preparation for vaccum testing at Hanford. The refurbishment
will take
about a week. The remaining parts(controller, computer, etc..)
will be
sent out to Hanford early next week. Arrangements are currently
in
process in preparation for the vacuum tests.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
Vacuum Controls
================
- P. Russell and R. Bork will be at Livingston next week to set up
vacuum
control system in preparation for system tests week of April 13.
- C. Patton, D. Barker, R. Bork will be in Livingston week of April
13 to run
install vacuum software and run system tests.
Control Area / Networking
=========================
- Fiber optics to mid/end stations at Hanford has been laid and will
be
pulled
into buildings and terminated next week.
- ATM networking system for Livingston will be installed week of April
13.
Data Acquisition
=================
- FDR documentation completed and being reviewed within the CDS group
for
release next week. FDR is being planned for week of April 27.
- Work continues on running reflected memory network into Sun workstation.
- Work has begun on using Spectrum VME Digital Signal Processor (DSP)
module;
able to communicate with the module and download software. Beginning
by
benchmarking 16K Real FFT. Initial testing is running ~300-400 16K
FFTs per
second on a single DSP (VME module has four DSP on board). Exact numbers
should
be available next week. Vendor, however, provided the wrong vxWorks
software to
communicate with the module across VME backplane (sent PowerPC software
instead
of MIPS).
- Work continues on data visualization (multiple signals in single
plotting
window and multiple FFT channel display).
- Benchmarks run using FFTW code on MIPS and Sun Ultra processors (8K
complex
takes ~4msec on Ultra, ~30msec on MIPS running vxWorks).
- In process of ordering vxWorks C++ libraries.
- vxWorks multi-processor (VxMP), signal analyzer and logic analyzer
software
packages have arrived. VxMP allows processes on multiple CPUs within
a VME
crate
to communicate as if they were on the same processor. The signal analzer
package
allows connection, graphic presentation, and analysis functions for
any
variable
running on a vxWorks processor across the network. The logic analyzer
package
provides time traces of all threads, interrupts, etc. within a CPU.
PSL
=====
- We were able to lock the laser using the EPICS controls for the first
time in the new PSL. We are now in the process of calibrating
the read back
channels and gaining operational experience.
LSC CDS:
=========
We are in the process of developing a prototype elliptic filter circuit
to
test on the bench. The whitening filter has become a simple pole zero
pair
but the requirement to filter out the test mass resonances has become
something of a challenge. I have found a minimal circuit using Matlab
that
consists of a
3 pole, 20dB, elliptic low pass at 4.8KHz followed by
3 pole, 30dB, elliptic low pass at 5.8KHz followed by
4 pole, 50dB, elliptic bandstop at 9-10KHz
This seems to minimize resonant high Q peaks in the internal stages
while
meeting the requirement of -100dB at 9.48KHz and -60dB at 14KHz with
minimal
circuitry and a mere 9 degrees of phase shift at the unity gain frequency
of
300 Hz. I am currently in the process of turning this design into a
usable
circuit. I believe that we can make it work but its painfully clear
that
what may be easy in Matlab is not necessarily easy in a real lab.
IOO CDS:
=========
Photodiode circuit boards should be here today. We will begin assembling
and
testing them.
Work is progressing on the Mode Cleaner length control circuit.
It looks like we are converging on a one or two U high rack mounted
controller for the Electro-optic modulator controller. This will contain
the
high voltage supplies and circuitry which links VME to the HV pulser.
Suspension
===============================
- LOS Controller testing has been completed. Testing of new programmable
attenuators for output matrix has been completed and should provide
an
acceptable solution. Changes will be incorporated into the design and
production
boards ordered.
- IOO Suspension rack cross connect wiring is 75% complete. Hanford
test
stand
wiring is 50% complete.
- Prototype SOS controller testing is 25% complete.
- It has been decided that the number of turns on the LOS heads will
remain
at
the current number (~310). The LOS controllers will be stuffed to provide
~20ump-p in detection mode and ~110 ump-p in acquire mode. The noise
at 40 Hz
will be 9e-20 m/rtHz at 40 Hz which is slightly higher than the requirement
needed to meet 1/10 of the SRD. Once operational experience has been
gained
on
the first IFO, the controllers can be modified to match the required
performance. In addition, the ISC group will look into the possibility
of
optimizing the noise and range requirements for each core optic in
an
effort the
improve the performance of the entire system.
As we move into operation of facilities under
our own control (as opposed to
contractor control) we must develop formal operational
procedures. These are
designed to assure safe and effective operations.
The first formal procedures were
approved this past week for Hanford. These can
be viewed at
http://www.ligo.caltech.edu/~sanders/Hanford_Operational_Procedures/
The index displays links to procedures for access
to the Beam Tube Enclosures and
for Pump Down of a 2 kilometer Beam Tube Module.
By summer, an extensive list of
procedures will be posted.
We will extend this methodology of formal procedures
to Livingston and to the campus
interferometers and other facilities on campus.
1.4.1.2 Project Controls (Lindquist)
Change Control (Lindquist)
The following Change Requests have been submitted and will need to be
addressed
by a meeting of the Change Control Board:
CR-980007WBS 1.1.5 - Beam Tube Bake, Adjust Budgets to reflect experience
CR-980008WBS 1.1.1 - Vacuum Equipment, Miscellaneous Changes
CR-980009WBS 1.1.1 - Vacuum Equipment Changes, QA, Safety, Floor Elevation, etc.
CR-980010WBS 1.1.2 - Beam Tube, Taxes and Module End Conditions
Reports (Lindquist)
Work on the Quarterly Report for the end of February 1998 has been delayed
while preparations for the NSF Semi-Annual Review have been in progress.
We will now turn our attention to this report.
Property Management (Chargois)
>From: Ed Chargois <chargois_e@ligo.caltech.edu>
Assisted the CDS Group with transporting and shipping of two (2) containers,
weight
in excess of 100 lbs., to the Livingston facility c/o Juilien Svoboda
with an expected
arrival date of 4/3/98 (account number 5J526).
Received Claim form(s) from American Transfer and Storage Co. for the
missing File
Cabinets. I will submit this claim after conferring with M. Coles and
F. Asiri to
ensure that the proper assessment fair market value will be be imposed.
Received a Letter of Auhtorization (LOA) confirmation from the NSF for
Gerry Stapfer
to attend the Property Sceening at the Keesler Air Force Base in Biloxi,MS
on 4/7/98.
Received information from the Bureau Of Land Management and Department
Of Interior
of the closure of their Helium Operation. Received a partial list of
the equipment that
will be available (first-come-first-serve basis). I'm preparing a WISH
list based on Gerry
Stapfer's, Alan Sibley's, and John Worden's assessment.
Document Control Center (Turner)
>From: Linda Turner <turner@ligo.caltech.edu>
NSF preparation -- NSF preparation -- NSF preparation!
STATISTICS. A total of 58 documents have been electronically submitted
to the
DCC. They were reviewed and placed on-line. Also, total of 84 documents
were
added to the DCC database. The following figures represent these new
additions
by category.
C = 37 D = 4 E = 6 G = 0 L = 3 M = 1 P = 0 T = 1
A total of 44 packages were received and distributed. An additional
17 packages were
sent out. The DCC processed 57 incoming faxes and the project transmitted
94 faxes.
Compiled set of Hanford drawings for Otto.
Financial (Akutagawa, Leonhardt)
>From: Cindy Akutagawa <cindy@acrux.ligo.caltech.edu>
All the reports are out for February and I am awaiting the CIT reports
and disks for the month of March.
>From: Britt Leonhardt <brittl@ligo.caltech.edu>
As per my on-going project to reconcile the contracts which are having
problems relieving their encumbrances ..
Last week I completed all the required journals for Hensel Phelps. When
this was finished, I noticed that the computer system still has not
relieved
the encumbrance. I had a meeting with Darryl of KPMG and asked him
for
help as this has now become a computer programming problem and we will
need additional help from Linda Leon of ACS to correct.
I have made additional journal corrections to the Butler Contract and
to the
Parsons contract as well.
I am still in the process of completing the necessary journals for Parsons,
but
we already know that there is one certain account number that is missing
from
the computer system. This problem is also something that ACS will need
to help
with as I have already spoken to Don Scott of General Accounting and
Linda Leon
of ACS. I have yet to receive any assistance to correct.
I have just begun to reconcile the Stranco contract and have completed
a wire
transfer to CBI in the amount of $966,455.00 as of 4-1-98 and am processing
normal pays as necessary on a daily basis.
[Note that late breaking news indicates that much of the work that Britt
has done
to review and address the commitments problem may have been in vain
(for lack
of a better term) because, we are told, the reports
that Accounts Payable and
Purchasing uses are not the same (different data)
as what General Accounting
is using. We will review this tommorow
and issue a summary memo. It seems
like some high level attention is going to be required to resolve the
commitments issues. -pel]
Cost Schedule Control Sysrtems (Rianda, Patlan, Duncan)
>From: Kristin Duncan <kris@acrux.ligo.caltech.edu>
Input and initiated review of the following Change Request's into the
March 1998
Performance Measurement Baseline (PMB):
CR-980005Extending Parsons CM support at Hanford$ 68,000
CR-980006Seismic Isolation increased costs$ 47,052
CR-980007Beam Tube Bakeout$ 180,000*
CR-980008Vacuum Equipment misc changes$ 164,241*
CR-980009Vacuum Equipment Changes$ 605,423*
CR-980010Beam Tube Taxes and Module End Conditions$ 59,574*
* Awaiting CCB Disposition (Not in PMB)
Updated the Schedule of Value Milestones for Hensel Phelps, Levernier,
and Woodrow
Wilson contracts reflecting month end March 1998 contract status. Continued
to work
with task managers on the status of contract values and C.O. amounts.
Continued documentation of the Estimate to Complete update process.
Began receiving
March 1998 schedule and cost inputs for the Detector group. Hytec schedule
revisions
for March received and input. Considerable time was taken to reconcile
the Hytec contract
schedule with the Detector Integrated Project System. Numerous changes
were made
(by Hytec) in March requiring the creation of new activities, the reformation
of existing
links, and a through activity to activity analysis of dates and durations.
Researched the feasibility of transferring the integration schedule
in MS project to
Open Plan Pro. Also looked at other possible alternatives to link the
integration
schedule with the current construction schedule. These methods currently
range
from a possible electronic system approach to a system of manual review
and input.
Integration Schedule:
Installed Project 98 and investigated its resource leveling capabilities.
Investigated
resource leveling capabilities of OPP and Suretrak. Revised resource
assignments
and resource groups
Subcontracts Management (Petrac, Jasnow)
>From: irena@ligo.caltech.edu (Irena Petrac)
University Of Oregon: PR/CO No.2, extending Dr. A. Arodzero's support
through
July 31, 1998, was released to Purchasing.
March Metalfab: PR/PO for the Production SEI Non-vacuum Hardware is
in advance
review by Detector Group.
Brookfield: PR/CO No.2, adding funds for shipping and handling of LOS
weldments,
was released to Purchasing.
Telos: CO No.19, allocating funds for the projected FY98 level-of-support,
and consolidating
closed accounts, is in the Project Controls Group Review.
>From: Ed Jasnow <jasnow@acrux.ligo.caltech.edu>
A meeting was held on Wednesday, April 1, among Miriam Beltran Del Rio
of Human
Resources, Gary Sanders, Fred Raab, and Ed Jasnow for the purpose of
discussing
the process of hiring personnel for the LIGO observatories at Hanford
and Livingston.
The discussion included generation of personnel requisitions, postings,
distribution of
qualification summaries, selection, and transmittal of offer letters.
On Wednesday, Carol Langguth and David Berley of the NSF were briefed
on the outstanding
tax issues by Sandy Pool, Gary Sanders, Phil Lindquist, and Ed Jasnow.
The briefing
covered the status of the lawsuit filed by Acme Materials and Construction,
and the
demand letter filed by the attorney for Woodrow Wilson Construction.
Discussions concerning issues presented by CBI were held on Thursday
among members
of the Facilities Group. These issues included surplus equipment, a
claim for extra work
on the Y arm at Hanford, and a proposal to perform additional measurements
on the Livingston
beam tube. It was agreed that additional research was required before
resolution could be
achieved.
Technical Configuration Management (Althouse)
>From: wea@ligo.caltech.edu (William Althouse)
No activity.
1.4.2.1 Quality Assurance (Tyler)
>From: "William H. Tyler" <tyler_w@ligo.caltech.edu>
LIGO QA (R. Vincent) witnessed final helium leak test, verified RGA
test results
and performed cleanliness inspection at the large gate valve vendor
GNB. A trip
report was prepared and has been distributed. One valve was found to
have a bonnet
flange leak which required rework to eliminate the leak. This defect
was documented
on a GNB inspection report. Mr. Vincent also obtained a copy of the
44 and 48 inch
gate valve operation and maintenance manual for early use prior to
the offical CDRL
submittal by PSI. Copies of this manual have been supplied to LIGO
Caltech and Livingston.
LIGO QA (W. Tyler) with M. Fine, visited the vendor performing He bomb
testing of
the SEI coil springs. There had been some uncertainity with regard
to the leak test
results of the first lot of springs, the test method used, and the
"sensitivty" of the test.
Following a quick tour of the vendor's facility, the specific LIGO
spring test setup and
instrumentation sensitivity were discribed/shown by Bob Gill (lead
engineer). Various
methods for improving the bomb testing sensitivity were discussed and
it was decided
to modify the test by increasing the bomb pressure to 60 PSI and to
increase the
pressurization time to a minimum of 40 hours (both recommended by the
vendor).
The first leak tests had been conducted with only 40 PSI and 4 hours
pressure exposure.
The vendor was also asked to record the serial number of the spring
and the leak test
reading. The He leak will also be read with a more sensitive (lower
leak rate) setting.
The proposed test "scale" would be 0 to 2X10E-9 atm cc3/s (this compares
to the
previous spec rejection requirement of 1X10E-7). The vendor also agreed
to plot the
data for history/trends? The cost of the proposed changes are expected
to be small
compared to the benefits. One other change being considered by M. Fine
and others,
is to perform the leak test with many (10?) springs at once. There
may be some
drawbacks to making this change due to test equipment limitations and
time to
pumpdown larger surface area, etc.?.
LIGO QA continued working LIGO Safety, R. Torres and site personnel
to develop and
sign off site operating procedures. Two procedures were approved and
"released" on the
LIGO "web" during this reporting period.
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, BB, CC, JK, DC)
__Integration:
Interface Control Drawings
Dennis Coyne revised two LLO Interface Control Drawings to correct
drawing errors. Bill Baldwin issued the DCN.
IFO Integration Schedules
Henry Patlan is changing the integration schedule staffing to included
on-site EEs and software personnel. He is also revamping the
staffing
to enable us to avoid assigning campus personnel to more than one
observatory at a time.
Nomenclature Document
The draft of the LIGO Nomenclature Document is about 75 percent
complete. Bill Baldwin met with Mike Zucker and John Worden to
iron
out several nomenclature and integration issues. Zucker took
an early
draft of the document to help him describe the placement of ASC
components on the vacuum chambers.
__Analyses: None to report
__Reliability:
Started developing a Maintenance Plan ; first sections are on PEM and
COC.
__Integrated Layout/Drawings:
Completed layout of spaces beneath all HAMs and BSCs from all
pertainent views. To be checked/corrected WRT as built equipment
at
Hanford.
PSL/IOO OPTICAL TABLE ENCLOSURE
Unit is currently being fabricated. Drawings are
finished.
Prints have been made for the vendor who is currently
building
the three (2-WA, 1-LA) units, and the drawings will be placed in DCC
next week when I get a spare moment.
MIT LEVER LAYOUT
The layout is still being done to show the path of
the optical
levers entering the WA-1A adapter, passing
through the two
hole louvre baffle, striking the ITMx 2K mirror and returning to an
exit port on the WA-1A. Expect to complete it (same layout for
Y-arm)
By the middle of next week.
OPTOMECHANICAL ILDs
The Mid Station xref's are in the process of being
started
(both X-arm & Y-arm), and the End Stations will
be next. It is
possible they could be finished with majority of preliminary core
optics support hardware by mid April.
PSL/IOO XREF LAYOUTS FOR ILDs
Will make up a separate Optical Table Assembly with
xref's from
PSL & IOO groups, which will then be xref'd
into the respective
vertex & elevation drawings. Will start as soon as any layouts
are
forthcoming from the two groups, hopefully sometime this month.
1.4.3.3 Modeling & Data Analysis (KB/HY/AL)
e swicthed the compiler to egcs 1.0.2 from g++ 2.7.2, as was explained
last time. For now, the compiler is placed in ~e2e bin and lib
directory, until it is placed in LIGO official area. We found a bug
in
string class implementation, and it is reported to developers and our
local copy of a file is fixed. These fixes will be maintained
systematically, with a program to test the cases in the future release
of egcs.
Kai C++ compiler has be installed with 1 month of demo key. Ed
is
evaluating it. For the number cranching, this one should be powerful.
This implementation is more closer to the ANSI specification. We are
going to test the cross-platform capability by using Kai and egcs
compilers, with macro files to implement the difference of different
compilers.
The mode decompostion calculation is now being implemented in C++.
Planing the including of higher order modules is on going, and the
implemenation of PSL is being studied.
Somuya is working on the SUS/SEI implementation, and he will summarize
his work next monday, 2:15 @SCR.
One major task now is the documentation and cleaning up some of the
codes to be ready for the release of the code for public.
Hiro received a request from Dr. Ohashi of TAMA to port the FFT code
so
that they can study the effect of the mirror quality. This support
(providing the code of FFT and do minimal support) was agreed to back
in Dec 1996 (during Hiro's visit to TAMA), and some implementation
was
done at that time. But, due to the platform dependence of the code,
it
was not fully tested. This time, TAMA prepared an account for Hiro
on
their SUN machine so that Hiro can port the code and test. Now, has
mirrors and IFOs and Dr. Ohashi, who is in charge of optics, is serious
about the simulation.
KB is on jury duty for two weeks.
We received the 50GB RAID hardware for the 40m. We are awaiting the
servers for installation.
We are working with NSF to define the best means to connect (logically)
LHO to Caltech.
Anderson reports:
I have worked with the authors of FFTW to determine that their MPI
version has activated a bug in the Intel native version of MPI.
However, I have gotten it to run with a more generic version of MPI
(mpich). am now in a position to benchmark large parallel transforms
on the paragon and beowulf.
I have also confirmed 6 new radio pulsars this last week.
COLLABORATIVE RESEARCH (LS Finn, Mohanty, Mukherjee, Romano)
S. Finn: I have developed prototype C++ classes describing time
series
and linear digital IIR filters, along with a small set of methods for
the manipulation of each. The time series are derived from the
valarray<double> base class of the C++ Standard Library (STL); IIR
filters are a collection of three valarray<double> objects.
The
valarray template from the STL was chosen for the construction of time
series and filters because its design supports efficient numerical
operations. Several features of these objects are worthy of note:
a) timeSeries isA valarray together with a sample rate. In addition
to
the usual constructors and assignment operators, it supports
transformation through application of a linear filter, described by
a
filter object. The filter operation is implemented as a transposed
direct type II system.
b) The Filter class is implemented as three valarrays. Any causal
filter whose z-transform can be represented as a rational function
in
1/z can be represented. One valarray represents the numerator
of the
filter z-transform (i.e., the ``FIR part''), one valarray represents
the denominatory (i.e., the ``IIR part''), and one represents the
filters internal state (which are related to the convolution of the
past histories of inputs and outputs). The filter can be set and
initialized.
c) When it acts on a time series its state is updated. Consequently,
it
can act on a long time series in consecutive pieces. Owing to its
implementation as a transposed direct type II system, application of
the filter to the time series is linear in the length of the time
series and is an ``in place'' operation: it does not require the time
series be duplicated.
These objects are not ideal as representations for the LIGO DAS;
however, they have provided valuable experience and insight. What will
probably remain is the use of valarray<double> (or valarray<float>)
as
the base class for the LDAS timeSeries class; however, there may come
intermediate classes in the inheritance chain to provide for greater
efficiency in the application of complex linear algebra operations
(primarily through deferred evaluation). Additionally, there
is no
history mechanism at present; this will be a separate class inherited
by all of the most deeply sub-classed objects available for use in
the
LDAS.
I will continue to use these objects to build the quadrature amplitude
demodulator (heterodyne) filter as part of the demonstration project
with Roy Williams and John Salmon. Again, the purpose here is to gain
experience with the issues that arise in implementation. It is not
expected that this design will persist in the final system design,
both
because the I do not understand the issues well enough to design an
appropriate set of classes and because the final system exists in a
larger universe, which forces on the design and implementation that
have not been considered here.
Finally, I continue to update the science benchmark matlab code now
being used by Peter Saulson in connection with LSC SEI/SUS development
group trade studies. More work remains to be done here, particularly
in the area of seismic noise, the laser shot noise as a function of
the
recycling mirror reflectivity (and losses), and inclusion of signal
recycling. (Unless enhanced LIGO is planned to have signal recycling,
this last strikes me as the lowest priority, though it has been asked
for.)
S. Mohanty: I have applied the modular scheme, based on solving
for
action-reaction forces in terms of driving forces, for the SEI/SUS
module to a simple model of two simple pendulums (each of length l
with
an end mass m) in series. The strings are described by the wave
equation with boundary conditions u1(0,t) = 0, du1(l,t)/dt = 0 and
du2(0,t)/dt = du2(l,t)/dt = 0 for the upper and lower strings
respectively. External forces are assumed to apply only on the end
masses. The action-reaction forces at all the interfaces between the
point masses and strings can be explicitly solved algebraically (in
the
Laplace transform domain) in terms of given external forces and the
Green's functions for the strings. That is, the action-reaction forces
can in principle be obtained by filtering the external forces. Once
the
reaction forces on the point masses are known, their motion is known.
I
am now looking into the implementation of the above theory in a
numerical form. Some theoretical issues also need more work.
S. Mukherjee: I have been looking into design of Kalman filter
for
tracking lines present in the power spectrum of the 40 meter data
(Sept. '97). I have studied steady state Kalman filter with simulated
data to obtain true and filtered responses graphically. I am in the
process of designing a filter that would accommodate the true signal
model and noise from the detetctor. This will be generalized further
by
taking non-stationary noise into account.
J. Romano: No report received.
1.4.4.2 General Computing (LW/TE)
MIT:
Nothing to report.
Livingston:
1. Working on purchasing a scanner.
2. Preparing for ATM install which will take place April 15-16. The
FORE SE has been contacted.
3. Still waiting for the computer order to arrive.
Hanford:
1. It has been decided to resume the GC meetings after
everyone has returned from Livingston. We will be going over the near
future needs and working out some of the logistics concerning
software.
2. Nothing to report on the T1 connection at the site. The procurement
is in process.
CIT:
1. The number one issue this past week was the backups. The tape robot
unit appears to have worn out heads on the tape drives. The backups
had
to be done by hand which took about three days. The tape drives will
be
sent in for repair but we are also checking on what it would take to
do
just a swap-out of the units. It has also caused us to start
looking
at other units that may have a longer life expectancy.
2. Repaired multiple pc's. Most were hardware problems of loose
connections and cables. Some software issues that dealt with items
being deleted and needing to be restored. We also upgraded some of
the
software pkgs. on the pc's .
3. Rebuilt the OS on a SUN box along with some minor hardware
modifications. Along that line we now have 4 dead monitors, one
completely blown sparc 5, a cd player that no longer works and multiple
disk drives that no longer function. Much of the older equipment
is
now breaking down. We are working on a replacement plan.
4. After talking with Rai W. and Larry J. we have decided to set up
a
special account on the server for CBI and a few other groups in-order
to accomodate work that has been going on with them. Larry W. will
be
working out some of the logistics with Larry J.
5. Barbara's Access work: - Developed a prototype application
for
vacuum outgassing. Am waiting for equations in order to proceed.
-
Worked on CDS EPICS database. Some changes are needed as a result
of
testing. - Developed author and keyword reports for DCC.
6. Web work: - Made several changes to home page, organizations
page,
and calendars page. Copied new GRASP manual file to web site.
-
Started making changes and updates to the GC sections of the internal
web areas. We hope to update the network maps after returning from
Livingston.
7. Multiple OS tests and modifications for units at Wilson House and
the 40M.
8. The usual of adding and modification of accounts. We have swapped
out a 9GB drive with a 23GB drive. Accounts that are no longer active
but have data/programs others are using will be moved to that location
in-order to free up space for the active users.
9. Larry's assistant, Suresh Man Singh,
is arriving next Tuesday.
Arranged and processed the paper work for 9 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 where needed with the NSF
Review held here at Caltech, March 31 thru April 2nd.
Prepared and distributed the Weekly Travel/Vacation Itinerary Report
for LIGO Staff and Visitors.
Processed Staff Payroll, incorporating various recent changes, new hires
and the processing of Vacation/Sick Leave accounting.
Rita Torres:
Date: Thu, 2 Apr 1998 11:21:42 -0800
From: Rita Torres <torres@ligo.caltech.edu>
ACTIVITY
Supported P. Lindquist and others as they prepared presentations for
NSF review.
For I. Petrac did change order No. 1 to Support Services, change order
No. 2 to Brookfield Machine, change order No. 2 to University of Oregon,
and revision to a JPL work order, supplement No. 5. Also did
change
order No. 19 to NYMA (formerly Telos) with accompanying procurement
justification, did chronology update. Did text for PO PC265792
with
March Metalfab, Inc. for production phase of SEI non-vacuum hardware,
edits ongoing; also formatted procurement justification for same.
With B. Tyler did revisions/edits to Beam Tube Safety Procedures.
Added procedure for Conflat Flange Assembly M980086-00-M; all
five procedures are in ongoing review by LIGO CIT and LHO
management.
Distributed: Change order No. 2 to Brookfield Machine, change
order No. 6 to Hensel Phelps, change order No. 9 to
Parsons, change order No. 10 to Levernier for the civil
construction.
Dorothy Lloyd:
No report received.
===================================================
LIGO Hanford Observatory (LHO) Operations - week of 2/24 and this week
(R. Savage for F. Raab)
===================================================
GENERAL ITEMS:
NSF review: John Worden, Otto Matherny, and Fred Raab traveled to CIT
to
participate in the NSF review.
Staffing: Corey Grey joined the LHO staff as an Operations Specialist
on
3/26. In the near future, he will mainly work on the HAM SEI
first article
test, but has been assisting with other activities such as putting
together
an "inventory/log book" to organize LIGO computers hardware and software
and helping set up the newly-purchased PCs. He also organized
and
installed furniture in a room for the four LHO summer interns (REU).
Laboratory preparations: (Doug Cook) Continued to work on procurements
for
the optics labs and vacuum prep and assembly area. Casework,
optical
tables, clean enclosures and flow benches have been ordered.
The lab
stools have arrived, as well as some optic components. A lab computer
for
the Beam Scan instrument will ship Friday so we can install the card
and
software and get familiarized with the instrument. Optical components
procurement us ongoing.
D.C. referred Kelly Barton of Airtech to Helena Armandula as the likely
source for her transverse flow bench. She is working with Jordan Camp
to
define the optical cleaning process.
Installation of a door between the optics lab and the vacuum prep and
assembly area was
delayed due to having to move more plumbing and electrical than originally
anticipated. The actual installation is scheduled for next Monday.
The 16' X 5' X 24" thick PSL/IOO optical tables have arrived and have
been
moved in to the LVEA. The whole operation went very smoothly after
the
tables were transferred to a flatbed truck at an outside shipping company.
We were unable to accept the delivery as shipped. Again, the
shipping
company failed to coordinate the delivery in advance as explicitly
requested. We will try to correct the process before the table
for
Louisiana is delivered.
R. Savage attended the Fourteenth Pacific Coast Gravity Meeting in
Eugene,OR and gave the talk, "Status of the LIGO Project: Ready for
the
Detector." (LIGO-G980032-00-W)
F. Raab attended the Thirty Fifth Pacific Northwest Association for
College
Physics conference in Seattle, WA and gave the talk, "The Laser
Interferometer Gravitational-Wave Observatory: Coming of Age in the
Northwest." (LIGO-G980038-00-W)
BEAM TUBE BAKE-OUT (Mark Lubinski, Mark Guenther, Kerry Stiff, Ron Brady):
Electrical Design: The pre-bid conference for Electrical contractor
work
per RFP EJ-291 was held at Hanford. There were several contractors
in
attendance. All bids
are to be turned in for this contract by 4/6/98 at Hanford.
DC Power Supplies: The third of four cooling water system has arrived.
There is to be one
cooling water system per DC power supply.
Bake Out Blankets and control system: The equipment for the control
of the
Bake Out Blankets has started to arrive on site.
Data Acquisition System: Work continues on refinement of the Operator
screens, detail screens and DC power supply control interface. I/O
hardware
design continues, this
includes cable, connectors and enclosures. Procurement of the I/O hardware
continues.
DETECTOR DIAGNOSTICS (Daniel Sigg, Rolf Bork, Mark Pratt, David Shoemaker)
The global diagnostics PDR was held on 3/20/98.
Thanks to a special effort of Peter F. the GDS reflected memory
organization including the interface to the ISC and DAQ systems
was written up and is available as a first draft in T980020-00.
Coding for the diagnostics software has started. M.P. and P.G.
finished the first version of the parameter API; D.S. wrote the
first version of the GDS system console.
HAM SEI FIRST ARTICLE TEST (Corey Gray and Rick Savage)
C.G. familiarized himself with the "HAM Assembly Sequence" document
and
purchased supplies to clean oil and dirt from the support piers, actuator
dummy spacers, and cross beams, as required.
Two of the four bellows arrived from Yehuda Kommemi at CIT. The
other two
will undergo contamination screening at CIT.
For additional information about this report, contact sanders@ligo.caltech.edu