The Project Control Meeting
for Monday April 20, 1998 will be
a Cost and Schedule Review
(Meeting time: 10:00 am Pacific Time)
Special Items: Beam Tube bakeout electrical contract status, 40 Meter/TAMA 300 data run proposal
WBS 1.1.1 Vacuum Equipment(Worden)
1. Gate Valves:
a.Re:O-ring failure at GNB - Bob Vincent was able
to inspect the
O-ring grooves of the "bad" gate. Measurements of
groove
width have been made which show a slight out of
tolerance
condition. Perhaps more significant is the fact
that this
groove had a number of repairs
made to it during fabrication.
Specifically, some weld metal had been added at
several
positions to correct machined vent slots. These
slots are
machined(90 degrees to the groove) at four locations
on the
gate to help vent the trapped volumes in the O-ring
groove.
PSI has requested a written report from GNB. To
provide
additional margin during the beam tube bake, PSI
recommends that we bake with the valves open.
b. Hanford valves-The right end station valve was
opened
today and inspected by GNB. The hope was that a
loose
conflat might be found. However, there is visible
distortion
of the bellows so PSI will proceed with replacing
it.
While here, GNB also listened to a valve in the
left mid
station. The decision here appears to be to open
this valve
for further inspection of it's bellows. PSI has
asked
GNB to procure two bellows in preparation. The immediate
focus, however, will be on completing the LA valves.
2.All chambers including the
MIT chambers are complete.
The MIT BSC is ready for storage. One HAM is baked
and
the other is through cleaning..
3. LA chambers continue to arrive. PSI has New Iberia
staff helping with the offloading. Hanford millwrights
will travel to LA in May for the equipment setting.
4. Installation activities:(Kyle Ryan)
X-arm end station:
PSI has a representative from GNB corp. on site
to investigate a vacuum leak associated with WGV20.
X-arm mid station:
PSI is completing the "cool down" portion of the
VE
bakeout. The BT gauge pair on X-1 port #1
are now
fully functional.
JW - PSI has found that the main ion pump at the
mid station
has a short on one side. They are currently "high
potting"
it with the hope of clearing the short. When this
fails
they will have to open this pump up for a look.
Normally
PSI would have checked this pump out prior to bake
but somehow
it fell through the cracks.
Corner Station:
Gauge pair and annulus ion pump and piping install-
ation is nearly complete. Signal cabling to
the Cetek
gate valves and large GNB gate valve controllers
is also
nearly complete. PSI has connected a "roots"
roughing
pump and Main Turbo pump locally to two separate
ports
on the left Beam Manifold in preparation to pump
down
this "isolatable volume".
Y-arm mid station:
No change.
Y-arm end station:
PSI completed the "100 hour" pump down portion of
the VE
commissioning and have only punch list items to
complete
before turning over this building to caltech.
The QDP80
roughing pump used to pump down the roughing header
dev-
eloped an oil leak and will have to be repaired/replaced.
JW - PSI has also completed the 100 hour post "purge/vent"
pumpdown at the end station. RGA results show a
total
pressure of 1x10(-8) and still dropping. This is
about
double the post bake pressure - very
good.
Date: Wed, 15 Apr 1998 09:56:10 -0700
From: ljones@ligo.caltech.edu (Larry Jones)
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 4/7: 363
343 0 343 286
as of 4/14: 380
358 0 358 300
One of the tube termination sections was made
with an
improper spacing between the 1" thick trunnion
ring and
the next 1" thick reinforcing ring. Due to
the
measurement being made to the wrong side of
the ring,
this was spaced 1" short. This is not a problem
structurally, and should be acceptable for
usage "as is".
This will be documented on an NCR and recorded
on as-
built drawings.
Magnolia Beach is rapidly approaching completion
at
400 tube sections.
b. Tube section installation
status (Livingston site):
(running totals):
Inside Leak Leak Final
Welded
Repairs Tested Failures Aligned
as of 4/7*:
281 19 279
0 0
as of 4/14*:
297 20 294 0
0
* Includes gate valves
as the finish "tube sections"
The rough pumping of the
X arm restarted on the morning of
4/8 and continued through
the evening of 4/9, at which time
the
four turbo pumps were started. The shutdowns of the
rough pump cart was apparently
caused by improper wiring of
the power to a chiller,
causing the pump to shut down due
to overheating. Turbo pumping
has been uneventful, and the
beam tube pressure is now
at 1E-6 torr. The three RGAs on
the X arm are being baked
this week and the first arm air
signature accumulation is
scheduled for next week.
An additional inside repair
was required on the Y1 module, at
a girth seam tie-in at the
tube top.
Measurements by CBI have
indicated that the BT/VE1 and Vertex
markers placed by SJB are
approximately 18 mm in error, offset
in the +X direction. This
agreed with some recent recheck
measurements made by SJB.
SJB rechecked BT/VE1 by referencing
external reference monuments,
and found that BT/VE1 required
a correction of 13 mm in
the -X direction.
BDF air flow performance
since 4/7:
Particulates (0.5u)/cu ft:
48 (max., any day)
Dew Point, degrees F: 0-12
Temperature, degrees F:
50-68
Of the 295 tube sections
installed, 257 have now been covered
with enclosure sections.
c. Vance Gervais, CBI's construction manager, has
been given a
promotion within CBI. He'll be leaving the LIGO
beam tube task
on 5/15 to become a regional construction manager,
responsible
for CBI's field efforts for a large part of South
America; his
office will be in Houston. It was expected that
team personnel
would be leaving as the beam tube task approaches
completion.
CBI's policy is to cover their responsibilities
with remaining
personnel, whose work is lightened by the phasing
down of the
operation. No other CBI team member has secured
his next
assignment, as openings within CBI are currently
rare. We may
have interest within LIGO for some of their people.
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)
Date: Wed, 15 Apr 1998 17:05:13 -0700
From: fba@ligo.caltech.edu (Fred B. Asiri)
1.1.3 & 1.1.4 Beam Tube Enclosure & Civil Construction/Design
and
Construction Management (Fred Asiri)
Issues:
>Hanford:Testing of the Vane Axial Fans are in progress.
So far
testing of fans at the corner station has
been completed.
Preliminary test results verfied that all
the tested fans are
performing within the limits set in the specification,
except
for one of the fan (Fan #6) which exceeded
the specified vibration
limit by 0.01 mil at 3600 RPM. Further review
of the test data
for Fan #6 will be necessary.
A Change Request for added scope of work to
Levernier contract
for amount of $139,645 was submitted to Change
Contol Board and
was approved.
Livingston: HVAC chilled water coils/fins
condensation.
Water is blowing off horixantal fins past
collection pans and
on to the floor in the Mechanical Room. Detail
inspection has
revealed that HVAC subcontractor has installed
air coils in
horizontal position instead of vertical position.
A Notice to
Comply has been issued to the Contractor.
GHS note: This has led to an unsafe water accumulation
which is being controlled by creating a controlled access area.
A Change Request for added scope of work to Hensel
Phelps contract
for amount of $272,430 was submitted to Change
Contol Board and
was approved.
A verbal agreement has been reached on the
cost of cleaning of
HVAC ducts and the metal perforated liners
in AHUs. A modification
to contract has been issued.
Date: Thu, 16 Apr 1998 21:26:56 -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 continue to focus our attention on sub-systems of the recycled
>interferometer. In particular we have being making extensive
use of
>our fast photodiode as diagnostic tool for alignment. Looking
at twice
>the modulation frequency has provided a wealth of information regarding
>alignment for the power recycled Michelson and the arm cavities and
>proved much more sensitive than using optical spectrum analysers which
>had been our alignment tool up until now. Indeed using this
>information we infer that the recycling gain for the sidebands is
~ 5
>rather than the ~ 3 which we inferred from the optical spectrum
>analyser measurements). One particuarly nice measurement which
Bill
>carried out was to look at the reflected light from a single cavity.
>He scanned the modulation frequency through the region where the
>sideband is exactly anti-resonant and thus where the 2nd order sideband
>becomes resonant in the arm). Looking with the fast photodiode
at
>twice the modulation frequency one can observe a very sharp dip at
the
>sideband anti-resonant frequency. This dip can be very nicely
>characterised in terms of the cavity parameters and provides a nice
way
>to measure cavity Q (the traditional measuement of this being done
by
>the cavity ringdown technique; a technique which has been shown at
the 40m
>in the past to be somewhat tricky)
>
>
>----------------------------------------------
>Interferometer Sensing and Control -- M Zucker
>(WBS 1.2.1.1.6, 1.2.1.1.7)
>----------------------------------------------
ASC Initial Alignment (Mason and Zucker)
-----------------------------------------
Working on preparations for IAS FDR to be held on 4/30. K. Mason
has
completed the FDR drawing package including details and bill of
materials. He is now refining the initial alignment procedure document
(T970151) for FDR release. MZ is completing the FD description.
Documents will be made available early next week (on or about 4/21).
ISC design/testing (Fritschel/Mavalvala)
-----------------------------------------
Continued work on the common-mode/frequency control model. Converging
(hopefully) on a design that meets residual frequency and phase noise
requirements, including cross-coupling paths.
#MZ note: Nergis will travel to Penn State
next week to finalize designs
with Gabriela Gonzalez.
LSC Lock Acquisition Design (Ware)
-----------------------------------
Discovered that I had incorrect thoughts about how SMAC operates; it
doesn't actually change the frequency of the laser (which makes sense
from a computational standpoint), but rather moves it back and forth
at the necessary rate in order to obtain the doppler shift equivalent
to the frequency change requested. So I modified SMAC to show
this,
and found that the limitation on the frequency change works out to
be
something like 10^7 lambda/s. I see shifts on the order of 10^3
lambda/s with the current design, so we are okay there. And I
seem to
acquire lock with the current laser frequency range and OSEM limits
(10 MHz and 100 um), so I think we are okay there also. Provisionally.
So I started working on incorporating ground motion again (still
problems there), and had several conversations with Dale and Nergis
and (secondhand) Peter about aliasing, filtering, digitization, where
the feedback loops actually go, etc. Progress, of a sort.
We've been
clearing up details and misconceptions.
LSC photodetector testing (Csatorday)
-----------------------------------------
The photodiode RF response test setup was realigned for the new laser,
and the calcite polarizer was replaced with a thin film polarizer.
The
reference photodiode circuit was fixed (it was inoperative due to a
fried opamp -- the cause of damage is unknown.)
The EG&G 2mm diode was tested at 5 Volts reverse bias without a
window. Currently the best measurements indicate a quantum efficiency
of 81% or a sensitivity of 70 A/W. These are lower than the
manufacturer's specifications by about 10%.
Phase noise interferometer/LSC digital loop test (Fritschel)
------------------------------------------------------------
o More investigations on the noise seen in the 'in-phase' demodulation
signal at the anti-symmetric port (this is the phase that is orthogonal
to the signal phase, which is traditionally called the 'quad phase').
In principle the noise in this output should be just due to shot noise,
but we have previously reported that in fact it is much higher (up
to
30x) than the noise in the signal phase, for frequencies above ~1 kHz,
where the signal phase output is shot noise limited. We still don't
have a complete understanding of the noise mechanism in the in-phase
signal, but we have discovered that we can control it. The optical
arrangement we used to lower the input power to the interferometer
had the side effect of increasing the residual RF amplitude modulation
-
up to a level of ~1%. By putting in a polarizer immediately after the
modulator, the RFAM was reduced, and the noise in the in-phase signal
was also reduced substantially. So apparantly the phase modulator
was upconverting the baseband laser amplitude noise (we had measured
that the in-phase signal was coherent with the laser amplitude noise);
why this appeared in this phase is still not clear (a measurement of
the phase of the RFAM showed it to be in-phase with the phase
modulation). So the AS port in-phase signal is now shot-noise limited
up to several kHz. Above ~5 kHz, and at very low frequencies (f<10
Hz),
it is coherent with the common mode error signal; this coupling is
also not clear.
o Thermal lensing: Brian has been doing more modeling of the thermal
lensing seen in the PNI. Two conclusions are that there must be some
excess absorption, on top of the 15 ppm/cm assumed in the
beamsplitter, in order to explain what we see; and that the lack of
axi-symmetry in the beam pattern must be due to non-axisymmetric heat
flow in the optic, due to the ellipticity of the beam in/at the
beamsplitter.
o Digital loop test status:
Ed has been investigating the appearance of random transients in the
output of the Pentek DAC. He's waiting on a VME bus analyzer to track
down the source of the problem.
The whitening/anti-aliasing filter for this test is basically complete,
and work has begun on the unwhitening filter.
>
>
>-------------------------------------------
>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
>------------------------------------
>
>We have received a proposal from Dick Wallace of LW for the
>Service, Enhancement, and Production contract, which we are
>now evaluating.
>
>
>Prestabilized Laser -- Peter King
>--------------------------------------------
>
>- The PSL lock to the reference cavity has been automated under EPICS.
>The lock acquisition code was a proof of algorithm. In the dozen
or so
>times that it was tested on the laser, it locked onto the TEM00 each
time.
>Things to improve upon are the user interface and speed of lock acquisition.
>
>- R. Abbott has been working on speeding up the lock acquisition process.
>Various things were tried at the default sampling rate of 2 Hz.
The
>easiest solution was found to be to increase the sampling rate to
5 Hz.
>However some degree of robustness was lost, although this could be
a personal
>impression.
>
> Work is proceeding on the all encompassing frequency
lock
>acquisition software which would also automatically set the common
and fast
>gains of the frequency servo.
>
>- The PSL remained locked to the reference cavity for a period of
65
>hours before being terminated by a circuit breaker tripping out in
the PSL
>Lab. The current version of the software failed to recover the
situation
>and manual intervention was necessary.
>
>- S. Seel has deployed the Minco process controller on the reference
cavity
>vacuum chamber. Initial findings are that the process controller
has
>eliminated the low frequency temperature oscillations observed with
the
>previous temperature control servo constructed from Stanford SR560
>pre-amplifiers.
>
>- R. Abbott has tested the VMEbus based intensity stabilization servo.
>The servo was controlled under EPICS. Whilst the controls behaved
as
>expected,
>sufficient gain wasn't available to suppress the intensity noise down
to the
>PSL specification. A revised version of the intensity servo
is expected to
>overcome this shortcoming.
>
>
>Input/Output Optics -- Dave Reitze, UF
>-----------------------------------------
>
>Procurement -
>
>Receiving quotes for all of the remaining IOO parts. Will start
ordering
>soon.
>Bullseye sensor from Advanced Photonix has been received.
>
>Mechanical -
>
>The IOO in-vacuum plan and elevation drawings are finally done.
Will be put
> under configuration control next week.
>
>In vacuum non-suspended optics mounts in fabrication. Minor
design flaws
> have been found and corrected.
>
>High Power Testing -
>
>Due to UF New Physics Building dedication last Thursday and Friday
and
> movement of large (20'x 4' x 2' optical table into LIGO lab, not
much was
> done. Setting up to look at sideband stability for multiple
EOMs.
>
>Mode Matching Measurement -
>
>Rana visited MIT last week where he learned some of the tricks for
getting
> the wavefront sensor electronics properly tuned. Mis-mode-matched
cavity
> is set up (donut mode clearly evident in reflected beam monitor)
and ready
> for measurement. Once the RF electronics are debugged, a real
measurement
> can begin.
>
>
>Core Optics Procurement and Metrology -- GariLynn Billingsley
>-------------------------------------------------------------
>
>REO has submitted a quote for coating the LIGO optics. Coating
is
>scheduled to start the first week in May. NSF approval of this
contract
>change is therefore needed soon. Optics and spares sufficient
for
>installation of the 2K interferometer will be through coating by mid-July.
>
>Veeco is to deliver an IR interferometer by the first of July.
>Installation/Calibration is estimated to be 2 months, our first
>"calibrated" measurements are therefore anticipated at the end of
August.
>There is a kick off meeting at Veeco April 17th.
>
>CSIRO has been shipped a substrate grade piece of fused silica for
use in
>machining BS05. The Beamsplitters are machined in pairs (we
have 5) to
>ensure the safety of the piece.
>
>
>Core Optics Coatings -- Helena Armandula
>--------------------------------------------------
>
>(Helena Armandula is on a 3 week leave of absence. G. Billingsley
will
>manage the REO coating contract during this time. - JC)
>
>
>Core Optics Support -- Michael Smith
>------------------------------------
>
>EDGE DIFFRACTION:
>Edge diffraction of the main beam in the arm cavity by the edges of
the COC
>baffles was thought to be a problem unless the aperture diameter was
made
>fairly large. However, following Stan W's suggestion, the interference
>effects of the diffracted beam from various regions of the tilted
aperture
>do not add coherently which results in a considerably reduced diffracted
>power. The reduction factor is being quantified.
>
>COC Annular Baffles:
>Annular baffles may not be needed if the COC aperture diameter can
be made
>smaller than the COC diameter. This may be possible because of the
reduced
>edge diffraction effects.
>
>Glint Criterion:
>Similar to the reduction in the edge diffraction, the glint power
from a
>surface will also be reduced because of the incoherent cancellation
effect
>due to the surface irregularities. This effect is being quantified.
>
>Baffle Calculations:
>A white paper describing the various baffle requirement calculations
is
>almost completed.
>
>PO Telescope:
>Dennis R. has completed a tolerance analysis on the off-axis PO telescope.
>Dennis, Mike and Ken M. are developing an alignment proceedure for
the PO
>telescope.
>
>
>-----------------------------
>Isolation Group -- M. Fine
>(WBS 1.2.1.1.1, 1.2.1.1.8)
>-----------------------------
>
>Seismic Design (Mike Fine)
>----------------------------------
>1. In-Vacuum Hardware:
>The HAM support table is very near completion. Allied has
>finished the welding of the top and bottom plates. Ther is about
>3/16 inch of warpage after the welding. The stress-relieving step
>will be done under load to improve the flatness before machining begins
>on the hardware. Work has begun on the HAM optics table. Components
are
>being machined and fit together in preparation for the welding step.
>
>2. Assembly Hardware:
>The phase 1 hardware were shipped to Hanford via 24-hour express on
>Monday. This shipment includes grout plate, drill templates, adapter
>plates, phase 1 assembly tooling, along with miscellaneous nuts and
>bolts. The remaining pieces are the optics plates that mount on the
>adapter plate and the HAM piping platform legs. Hytec has both these
>hardware and will fit check them before sending them to Hanford.
>Phase II hardware is being fabricated. We are expecting delivery of
>this hardware by the end of month.
>
>3. Coarse Actuator Component -Scissors Table:
>Hytec has received the scissors table test fixture and is still waiting
>for the flexures that will be used on the fixture, which will be delivered
>next week. The load frame is still being manufactured along with a
number
>of fixturing components. The delivery of these hardware should begin
>next week.
>
>4. Coarse Actuator Controls-Position Sensing Transducer:
>Hytec has run an initial stability test on the LVDT and is currently
>running a second round of tests. The first test showed a mean signal
>drift of 8 microns over a 63-hour period. The second test is still
>running, but after a 51-hour period the signal drift is 9.4 microns.
The
>general trend is an upward moving output voltage during the test.
>Hytec is ordering an encoder that may be used instead of the LVDT.
>This encoder provides absolute positioning within +/- 1/2 turn,
>which is +/-1/16 to +/-1/10 of an inch translation depending on the
axis.
>This may be a better solution than the current baseline LVDT approach.
>
>Suspension -- (Janeen Hazel/Mark Barton/Fred Raab/Mike Fine)
>------------------------------------------------------------
>
>1. LOS Assembly Fixtures:
>Schober has informed us that their supplier has slipped the delivery
of
>conductive Teflon. This will delay their delivery of Teflon screws
to us,
>but other parts they are making for us are on schedule and will soon
>be ready for inspection.
>
>2. Alignment Fixture:
>Janeen has prepared an alignment fixture fabrication specification.
>She has now four machine shops who will to quote for fabrication.
They
>are all on the east coast, making it easy for CDI to interact with
>the fabrication.
>
>
>---------------------------------------------------------
>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. Primary
>developments are a set time conversion and synchronization functions.
>Other work included porting GDS from unix to vxworks and working out
a
>resonable development environment.
>
>Physics Environment Monitor (Alex Marin)
>-------------------------------------------
> More POs were issued for PEM subsystems according to
our
>internal schedule. We were informed that the DAQ/PC system will be
>deliverd to MIT arround May 1st, in order to implement some
>software required for the 1st SEI article test. We are also
>working on a detail preliminary schedule of mounting and testing
>of all the PEM systems.
>
>Optical Contamination (Daqun Li)
>---------------------
>
>The ringdown and mode spacing data from both cavities (cavity 1:loaded
>with kapton cables; cavity 2:empty) still look good. With the
use of
>temperature stabilization on both cavity chambers, the ringdown data
>from the two cavities showed a less scatter pattern over time than
>those previous data without using temperature stabilization.
>
>The Core Optics Loss Scanner was locked to a TEM00 mode using a 70
ppm
>HR mirror and a 3% transmittance mirror. To maintain a stable
lock, the
>fast PZT actuator of the NPRO needs to almost swing over its full
range
>to effectively suppress the noise in error signal. We are currently
>trying to improve its performance.
>
>
>Non-Optical Contamination (Matt Smith)
>--------------------------------------
>All material that has been identified has been ordered by Larry Jones
>for the preparation for the HAM leak/RGA test prep. Most of
the
>material will be sent to CIT for cleaning then sent to WA 4/24.
Late
>ariving items will be delivered directly to WA for cleaning at the
site.
>I will be going to WA the end of this month to start the assembly
of the
>RGA vacuum tree. With luck I can have RGA section assembled,leak
>checked and RGA scanned before the spool arrives on 5/5. I am
putting
>together a detailed schedule of events, optimistically.
>
>-----------------------------------------
>Control and Data System -- R. Bork
>(WBS 1.2.2)
>-------------------------------------------
>
>No report received.
>
1.4.1.2 Project Controls (lindquist)
CHANGE CONTROL (lindquist)
=========================================
A meeting of the Change Control Board was held on Monday, April 13,
1998.
The following Change Requests were approved:
CR-980008 WBS 1.1.1 - Vacuum Equipment, Miscellaneous Changes
CR-980009 WBS 1.1.1 - Vacuum Equipment Changes, QA, Safety, Floor
Elevation, etc. (Only partial approval)
CR-980010 WBS 1.1.2 - Beam Tube, Taxes and Module End Conditions
CR-980013 WBS 1.1.4 - Field Work Directives for Livingston
CR-980014 WBS 1.1.4 - Field Work Directives for Hanford
In addition, the following change requests have been submitted:
CR-980007 WBS 1.1.5 - Beam Tube Bake, Adjust Budgets to reflect experience
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-980015 WBS 1.1.1 - Miscellaneous Vacuum Equipment Mods to reflect
changes to the PSI payment milestones
REPORTS, WORK PLANS, PROPOSALS (lindquist)
=========================================
A DRAFT of the Quarterly Status Report for the period ending February
1998
has been distributed for review and comment. This particular
edition
represents a reduction in content and effort relative to previous submit-
tals in recognition of the fact that much of the Facilities work has
been
completed and we are making the transition into the Operations phase
and
reporting style. Hopefully we can continue this reporting level for
future
Quarterly Status Reports. The content has been derived primarily
from the
materials prepared for the NSF Review. This imposes some discrepancies
concerning the end of February cutoff. I have asked group and
task leaders
to review the draft and provide any corrections before the end of next
week.
Also suggestions for a few charts and photographs will be appreciated.
PROPERTY MANAGEMENT (chargois)
=========================================
No report this week.
DOCUMENT CONTROL CENTER (turner)
=========================================
>From: Linda Turner <turner@ligo.caltech.edu>
STATISTICS. A total of 32 documents have been electronically
submitted to the DCC. They were reviewed and are ready to be
transferred on-line. Also, total of 76 documents were added to
the
DCC database. The following figures summarize these new additions
by category.
C = 39 D = 19 E = 4 G = 3 L = 6 M = 0 P = 0 T = 5
A total of 33 packages were received and distributed. An additional
18
packages were sent out. The DCC processed 79 incoming faxes and
the project transmitted 63 faxes.
Photo Activity: four packets received and processed
LIGO-G980016-00-O, Livingston Site Aerials,
dated February 28, 1998
LIGO-G980017-00-O, Livingston Site Panoramas,
dated March 9-12, 1998
LIGO-G980018-00-O, Hanford Equipment Installation
dated March 20-23, 1998
LIGO-G980019-00-O, Livingston Site Construction,
dated March 17-26, 1998
Total Number of Construction Photos added to the
database as new documents: 85
Total Number of Viewgraphs created and distributed: 125
Three Custom Viewgraph Presentation assembled
for lecture use.
No Construction Videotapes received during the period.
COST SCHEDULE CONTROL SYSTEMS (duncan, rianda, patlan, akutagawa)
=========================================
>From: Cindy Akutagawa <cindy@acrux.ligo.caltech.edu>
The March CIT status reports and disks have arrived. After going
over all
four copies and both disks, I discovered that all EXCEPT one disk (monthly
actuals SLH5.txt) are missing account 5G524 [it should be noted
that this
is not a valid LIGO account, and Cindy is looking into who opened it
and
where the charges are supposed to be recorded - pel]. With further
invest-
igating, I found that this account has been open for at least two months.
I have asked Sandy Kingston to run me a copy and I will update the
March
reports with the current month and cum-to-date information. I
left voice
mail with Don Scott (the person in charge of distributing the reports
and
disks) informing him of this error. Hopefully (don't hold your
breath) the
reports and disks I receive from him will be complete next month.
>From: Kristin Duncan <kris@acrux.ligo.caltech.edu>
Attended the CCB meeting and began review of approved and proposed Change
Requests for inclusion into the April 1998 Program Management Baseline.
Began review of the PSI contract schedule value of milestones in comparison
to the latest contract modifications to ensure correlation.
[See Change
Request CR-980015 above - pel]
Posted and reconciled Costs and Commitments for the month of March.
Numerous
problems were encountered and this process was not completed until
early
this week.
Archived March schedule data and produced a Level One Milestone chart.
Entered the task manager ETC's into Cobra.
Resolved numerous COBRA issues regarding earned value.
SUBCONTRACTS MANAGEMENT (petrac, jasnow)
=========================================
>From: irena@ligo.caltech.edu (Irena Petrac)
REO: Change Order (CO) No.5, authorizing procurement of long-lead optics
cleaning and coating tools, was released to Purchasing. Proposal
for
production coating is in Detector Group review.
Univ. Of Florida: CO No.4, incorporating IO construction and installation
support effort, is at NSF for approval.
March Metalfab: Purchase Order (PO) for Production phase SEI non-vacuum
hardware at NSF for approval.
Veeco: PO for Fizeau Interferometer, a replacement for IR Interferometer
from Phasse Shift, is at NSF for approval.
Specialty Components: PO for Production phase SEI air bearings is in
LIGO project review [Fed-Ex'd probably today -pel].
Brookfield: CO No.2, adding money for shipping the LOS weldments to
Caltech, was released.
MIT: CO No.24, allotting interim funds through the end of May, pending
processing of FY98 budget adjustment, was released to Purchasing.
An
advance copy was faxed to MIT.
Lightwave: Proposal for "Ongoing Service, Enhancement and Production
of LIGO 1064-nm Laser Systems," is in Detector Group review.
Pegasus: Firm-fixed-price offer for Production SEI metal coil springs
is pending [received Thursday afternoon - pel].
Allied: Firm-fixed-offer for Production SEI in-vacuum hardware is
pending. CO to incorporate this effort is under way.
Telos/FDC: CO No.19, incorporating projected support needs for FY98,
is
in Project Control Group review.
Butler: Robert Sass is being added to the Contractor
Personnel. Robert
will be providing Detector Group support effective
April 20st.
>From: Ed Jasnow <jasnow@acrux.ligo.caltech.edu>
Technical discussions were conducted with the four companies that have
submitted proposals for the beam tube bakeout electrical contract.
A final
selection recommendation will be made by the review committee on Friday,
April 17, and a report forwarded to the source selection official,
Gary
Sanders, by Tuesday, April 21. It is expected that the review
package will
be sent to the NSF by Thursday, April 23. GHS
note - assuming the deliberations lead to an affordable selection, we can
meet this schedule.
Requests for Proposals for the provision of liquid nitrogen for the
Livingston site were released on Wednesday, April 15. RFP's were
sent to
three firms. Proposals are due on Monday, May 11.
Negotiations continue on the issue of taxes. A copy of Modification
No. 1
to the Acme contract was faxed to Acme's attorney by Sandy Pool.
This is
the modification that puts state and local taxes into the clause covering
contract reductions for after-relieved taxes. Acme's lawsuit
contended
that only federal taxes were covered in the clause.
In a teleconference held on Tuesday, April 14, Sandy Pool and Ed Jasnow
briefed Aaron Asrael, David Berley, Jesse Laskin, and Carol Langguth
of the
NSF on the status of the tax issues.
TECHNICAL CONFIGURATION MANAGEMENT (althouse)
=========================================
>From: Bill Althouse <althouse_w@ligo.caltech.edu>
Nothing to report.
1.4.2.1 Quality Assurance (tyler)
>>From: "William H. Tyler" <tyler_w@ligo.caltech.edu>
LIGO QA (R. Vincent) visited GNB large gate valve vendor to get vendor
status, measurement data for the o-ring problem and to get some sense
of
the possibility that the o-ring failure could occur with other LIGO
GNB
gate valves. Mr. Vincent was also able to observe a "normal" groove
o-ring
installation for comparison to an oversized groove and the lack of
o-ring
"squeeze". Mr. Vincent was unable to discover the existence of GNB
valve
gate inspection data or assembly logs which could provide some information
regard the condition of the o-ring grooves. Mr. Vincent will be at
GNB
again in the next week to witness the valve cycle testing, to perform
cleanliness checks and to inspect the other out-of-spec groove gate.
LIGO QA visited the coil spring He bomb test vendor with Fine and Whitcomb
to observe and evaluate additional changes to leak test procedure/process.
The vendor demonstrated successfully a multiple spring leak test capability
which LIGO had proposed. This method with some change in acceptance
criteria was agreed upon for "immediate" implementation.
LIGO QA is also helping to resolve the issue of LIGO's acceptance of
Allied's alternate cleaned parts bag supplier (different than current
LIGO
vendor).
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, BB, CC, JK, DC)
__Integration:
WA IFO Cable Tray Specification
Bill Baldwin has begun drafting the specification for the LHO cable
tray installation. He is also sketching sections of the installation
around the chambers and will be adding in the SEI system. There
appear
to be only a few places where the installation will be difficult, but
not impossible.
Naming Conventions Document
Ara Bedalian has completed most of the drawings to be included in the
Naming Conventions Document. Bill Baldwin has expanded the document
and will be asking for nomenclature help from the task leaders next
week.
__Analyses: Nothing to report
__Reliability: Nothing to report
__Integrated Layout/Drawings:
OPTICAL LEVER LAYOUT
The layout is 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. Also a set of levers for the ITMX 4K will be done at the
same
time. This project has been on hold due to other priorities. Expect
to
finish this by 4/22/98.
WASHINGTON OPTOMECHANICAL ILDs
The Mid Station xref's are set up waiting for input
from the
various groups (IOO, ISC,COS). When time permits,
will also set
up End Stations.
PSL/IOO XREF LAYOUTS FOR ILDs
This is not started yet due to current priorities.
Will start
assembling the Optical Enclosure (PSL/IOO table)
package near
the first of next month and hopefully receive input on the PSL and
the
IOO layouts by the middle of the month.
The LHO Integrated layout drawings for LVEA and both types of VEAs have
been placed on the Integration Working Group BB:
http://docuserv.ligo.caltech.edu/~coyne/index.html.
Also on the BB have been placed the latest estimates forthe LIGO
Sensitivity curves (4km and 2km) using a parameter set presently being
carried by Detector Systems. The parameter sets are also available
along with the grpahics.
Updated and released the full set of LOS1 suspension assembly
drawings.
Detail drawings of LOS2 suspension parts in progress.
__Mock-ups:
HAM LOWER HALF MOCK UP
The Ham lower half mock up for support beam assembly
procedure tests is in
fabrication in the carpenter shop and is slated to be finished by the
end
of next week, & shipped to Hanford by 5/1.
ELEVATED PLATFORM MOCK UPS
An aluminum elevated work platform sample is currently
in the High
Bay. Currently looking for platforms with larger work surfaces through
contact with a few companies in that field. Should make final decision
on
purchase plan by the end of next week (Friday, 4/24/98).
1.4.3.3 Modeling & Data Analysis (KB/HY/AL)
The implementation of the mode support in the End
to End model is continuing. The structure of the
implemenation is under discussion. The core part of the
code for the mode decompostion is almost done,
including the validation, and refinement of the
class and merging into the E2E package is the next
task.
The summation cavity for the michelson + recycling
mirror has been modified to get the field from AR
coated side of mirrors.
Kai compiler performance has been tested by comparing
with the g++ code. One preliminary result indicates
that the code generated by Kai compiler is twice as
fast than that of g++. This is based on a simulation
using single FP system with suspension and servo. The
test will go to use full LIGO configuration to calculate
the transfer functions.
KB was finally able to get the latest version of Redhat LINUX
working on a pentium laptop. The installation had several not
so straight-forward aspects associated with it, but this version
of LINUX has so far proven to be far better for code development
than the slackware distribution KB was working with previously.
KB downloaded the latest version of FFTW
and tested the version out under LINUX. KB found the new
release (1.3) to be about 20% faster on the pentium than
was the 1.2 version...to get this performance the configuration
must include an intel "hack".
KB also worked out the bugs in the parameters used in the noise models
from last summer's SURF project and building new 2km and 4km IFO noise
model curves. These curves have been passed on to Dennis Coyne
in pdf
format for his webpages. David Shoemaker requested that noise curves
be
generated using a lower Q for the pendulum (and violin) modes than
was
previously in the parameter files, which had been taken from the
suspension FDR. David Farnham packaged up the C++ noise library
and
provided a user interface to the curve generator. KB made some
modifications to this package and bundled them up and gave them to
David Farnham along with several suggestions for minor improvements
to
the package. Along these lines, it is known that the seismic and
gravity gradient models are not as accurate as current models and KB
worked on getting newer models for incorporation in to the C++ classes
in the near future. KB also spent time retro fitting the LIGO paper
he
wrote in 1996 (Poland paper) to reflect these changes but that has
not
been finished yet. (NOTE: the noise model code runs on Suns and Redhat
LINUX at this point in time).
KB met with Roy Williams, Tom Prince, Walid Majid and Albert Lazzarini
this week to describe KB's LDAS architecture and base level API
component which uses TCL/TK and C++ extensions to separate out command
and data communications. This design has been forwarded to IPAC where
an interest is developing and KB will meet with members of IPAC at
some
time to describe to them.
KB also worked a bit on getting out a report for the GDS PDR. Sorry
for
the delays folks, I'm still getting suggestions for edits to the
report. Hope to have something once my time frees up a bit, i.e., when
the computer systems stabilize or Larry returns.
We obtained a target IP address from PNNL to test the ESnet SDSC-PNNL
link. The link appears sound (tests performed by SDSC for us). Next
to
dos: (i) set up link to CACR and defined routing configuration (to
be
done by PNNL at their end and SDSC at the crossover) to "hardwire"
LIGO-PNNL-SDSC-CACR-LIGO traffic. We are awaiting delivery of the
routing hardware needed at Hanford: delivery before end of month
(hopefully). (ii) Then we need permission from ESnet to link up and
to
use IP address space at LHO. (iii) Once this is in place, we would
be
ready to actually test LIGO-to-LIGO traffic. (iv) In the meantime,
the
MOU is slowly working its way through the digestive tracts of DOE/NSF.
Hopefully soemthing will come outbefore the end of 1998. Jim Leighton
(ESnet/LBNL) is looking into purgatives for us.
COLLABORATIVE RESEARCH (LS Finn, Mohanty, Mukherjee, Romano)
S. Finn
-------
0) Bought a house in State College, PA (not charged to LIGO project.)
1) Testing and debugging of time series and filter classes, as well
as functions
that design filters (currently Kaiser window FIR filters) and implement
the
filtering operation on a time series. In progress is development of
random
number generator (uniform and normal) objects and IIR filter design
(Butterworth
& Chebyshev). This is a continuation of a project with three goals:
i) a LIGO noise generator,
ii) a quadrature amplitude demodulator, as a demonstration project
for the
LDAS design,
iii) gain experience with c++ and numerical object oriented
methods.
2) Notes on the free modes and response function of a suspended mass
pendulum
driven from its suspension point for Mohanty and End-to-end model group.
These
show how both the pendulum and violin modes arise from a single set
of equations
and boundary conditions.
3) Notes on thermal noise in a suspended mass pendulum. Consider a
suspended
mass pendulum, where dissipation arises as the curvature of the suspending
wire
changes. (This would be one mechanism for structure damping of the
pendulum.)
These notes describe the power spectrum of the mass motion owing to
thermal
noise, including at once both the pendulum mode and all the violin
modes.
4) Finalized GWIC mtg agenda.
S. Mohanty ---------- I had a meeting with Hiro, Albert, Biplab and
Matt to discuss the modular scheme I have constructed for modelling
the
SEI/SUS. The idea has to be worked out fully but a preliminary opinion
was that it appears alright. We discussed whether the same scheme
can
also be used to generate thermal noise with the correct power spectral
density and it was concluded that it can. I have had to spend
a couple
of days figuring out Income Tax matters which are somewhat complicated
for a non-resident alien.
S. Mukherjee ------------ I am continuing my work on Kalman filtering.
After having tested the models on simulated data (both steady state
and
time varying design), I am now looking into extended Kalman filtering
to track the evolution of amplitude and phase of the lines present
in
the power spectrum of the 40-meter data taken in September, 1997.
J. D. Romano: ------------- Continued writing MATLAB functions
to
calculate (via Monte Carlo simulations) false alarm and false dismissal
rates as functions of threshold for the cross-correlation and
maximum-likelihood statistics for stochastic gravity-wave searches.
1.4.4.2 General Computing (LW/TE)
No report from Larry W this week. He is working around the clock with
Rolf, David Barker & co. to install the Livingston Observatory
ATM
switch. At last report, things were proceeding, but more slowly than
hoped for.
KB has spent most of his time since returning from jury duty on Tuesday
being Larry Wallace's fill-in while Larry is away. The system
has been
in a very bad state the last few days, constantly crashing and coming
to a crawl.
AL NOTE: The immediate cause of the difficulties was >90% disk usage
on
LIGO (we have over 70GB: last year at this time we had approximately
half this amount -- another metric of LIGO construction progress) and
server sirius crashed. Collateral damage involved the print/mail server
(acrux) and our calendar server(gsparc). By COB Thrusday,things
appeared running again, although severe slowdowns were apparent. BTW
Kent's request for freeing up disk space succeeded in bringing the
most
cholked partition down to 85% usage. We also straightened out the
network setup for E. Wood.
Arranged and processed the paper work for 16 trips. Continued
to
work on arrangements for the upcoming GWIC/PAC4 meetings to be
held in Livingston, LA, next week. 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 Liz Wood wherever possible
during
her first week with LIGO.
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, 16 Apr 1998 09:10:12 -0700
From: Rita Torres <torres@ligo.caltech.edu>
ACTIVITY
Continued working with B. Tyler on Laser Safety procedures; established
a
contents/status sheet for these. The form "Process Traveler"
to accompany
incoming parts is in process. Also printed out color adhesive
tags
related to a procedure.
For I. Petrac did edits to change order No. 5 to Research Electro-Optics,
worksheet to change order No. 24 to MIT. Did PC266884 for Specialty
Components, Inc. for SEI Air Bearings; edits ongoing.
For E. Jasnow did letter to CBI Re: COR #24. Did IFB EJ-293 for
Supply
of Liquid Nitrogen to LA site; FedExed these.
For P. Lindquist prepared books to contain various reports beginning
1/98.
Velo-bound and submitted to the DCC Project Controls chronological
files
for 1997. Deleted old backup files per request of Systems Admins.
Purged file drawers and began re-arranging Room 357 WB. Work continues.
Distributed: Additional material for CCB of 4/13/98, change order
No. 5 to
Research Electro, change
order No. 24 to MIT.
Dorothy Lloyd:
No report received.
=========================================================
LIGO Hanford Observatory (LHO) Operations (F. Raab)
=========================================================
General Items:
--------------
On April 13, Christine Patton started her new
job as an Operations
Specialist at LIGO Hanford Observatory, with
a specialty in computer
software. Christine will also take responsibility
for system
administration issues at LHO. Formerly Christine worked for us as a
contractor, developing the software for the vacuum controls racks
and more recently working on the data acquisition software. Christine
and Dave Barker are on loan to the Livingston Observatory for the week
of 4/13 to support installation of vacuum equipment racks there.
The new fork-lift truck has arrived for the LVEA with its clean room
modifications, etc. This fork lift was required to install seismic
equipment into the HAM chambers, but it will find many other uses.
We also received the optics lab computer and beam scan equipment for
doing the beam profile analyzing and lab processes, etc. Kyle Ryan
has
gotten most all of the purchase order activity pushed through Caltech
for bake-out oven equipment. The bake-oven chamber itself is nearing
completion of fabrication and should arrive at Hanford by mid May.
Betsy Weaver, a senior astronomy student from
Washington State
University (WSU, pronounced wa-zoo) will
be working with Kyle and
Fred Raab to assemble and test the vacuum system and work up analyses
of the bake-oven performance. The goal is to use residual gas spectra
of baked specimen at both room temperature and at an elevated
temperature to obtain information on both the outgassing rate and the
dwell times of residual outgassing components on the vacuum vessel
walls. LIGO will have a total of four students
like Betsy working on
REU projects this summer. Rick Savage
is working the issue of making
housing arrangements for them.
The LIGO Hanford Observatory Laser Safety Plan is being submitted for
final approval and signatures. The transverse flow bench and its table
are in transit, along with 10 additional work tables and the optics
lab soft wall enclosures. The laser enclosure for the PSL is on its
way pending final approval from Lee Cardenas. The optics lab and laser
support equipment continues to arrive. The fume hoods are now fully
installed in the optics lab and vacuum preparation areas and a doorway
has been completed between these two rooms. This will greatly aid the
movement of equipment when suspension work begins in a few months.
Corey Gray has finished cleaning HAM piers and arranging them in the
HAM 1st Article Test Area. The 1st Article Test Area is in the process
of being set up with partitions, concrete drill, and HAM cleanroom.
On April 20, Hugh Radkins will join the LIGO
team at Hanford. Hugh is
a geologist by training, who worked most recently with the Rogers
Surveying team doing the beam-tube and vacuum-chamber survey checks
for
LIGO. On April 21, Hugh and Corey will travel to Los Alamos to put
their heads together with HYTEC on the initial alignment and placement
of the BSC 1st Article seismic piers. On their return, we expect to
have equipment ready to do an encore performance on the HAM seismic
piers.
Fred Raab, Rick Savage and Daniel Sigg spent a day touring the Physics
Department at WSU in Pullman. Fred gave a LIGO update at the Physics
Colloquium and a lunch meeting was arranged with Physics students.
A reporter and cameraman from KING5-TV (the local
NBC affiliate in
Seattle) visited the observatory to do a story
on LIGO. Expect to see
them soon to look at mirrors and such in Pasadena.
Beam-Tube Bake Out:
-------------------
(M. Lubinski, M. Guenther, K. Stiff and W. Althouse)
Electrical Design
A review and analysis of the Electrical Contractor proposals continues
with meetings with each contractor, occupying most days during the
week
of 4/13. These meetings are to determine contractor understanding
of
the scope of work and cost analysis.
DC Power supplies and Cooling Water Systems
The 4 cooling water systems for the DC Power Supplies are now on site.
Bake Out Blankets and Control System
The blankets and the control system equipment for them continue to
arrive on site.
Data Acquisition System for Bake Out
Construction of the I/O drop boxes continues. Software refinement
is
in progress and screen revision continues.
Weather station
The weather station for use during the Bake Out is up and running.
For additional information about this report, contact sanders@ligo.caltech.edu