The Project Control Meeting
Agenda for Monday July 6, 1998 will be:
(Meeting time: 10:30 am Pacific Time)
WBS 1.1.1 Vacuum Equipment(Worden)
1. Gate Valves:
Status at GNB:
Five Livingston valves have been held back at GNB for rework
there. Two pneumatic valves are packaged for shipment and
a third electric valve is expected to be ready for shipment
next week. Of the other two electric valves, one is ready
for testing and the other is ready for assembly.
Seven valves are in Livingston - 6 on the beam tube and one
mounted with the PSI equipment. These will be reworked on site
as CBI frees up the beam tube. All 12 Livingston valves will
require leak testing and cycle testing in the field.
Hanford status:
PSI/GNB have started work on 8 valves. Of these, three have
passed cycle testing and sound very good. One of these is on
the Y-2 beam tube. PSI hopes to finish off the second Y-2
valve next week and perform the in-situ leak tests
so that we are free to proceed with our bake.
Test covers are on site - these will be used to blank off the
beam tube gate valve and allow baking with the valve in the
open position.
The key problems with the valves appear to be:
-incorrect O-ring groove machining.
-undersize ball screw which adds to "back lash" noise.
-oversize ball screw which interferes with free bellows motion.
-incorrect travel adjustment which damages bellows.
-loose drive and bearing assembly which adds to "back lash" noise.
So far GNB is addressing all of these either with replacement components
or with adjustments in the field. Now that the factory work is
nearing an end (with the completion of the Livingston valves)
GNB is planning a full time presence at Hanford(so I've been told).
a. WGV11 (Y-end) Complete except for bearing replacement and in-situ
leak
test.
b. WGV12 (Y-mid BT) Should complete early next week.(First BT bake)
c. WGV14 (X-mid) Complete except for in-situ leak test.
d. WGV17 (Y-end BT) Complete except for in-situ leak test.(First BT
bake)
e. WGV19 (X-end BT) Noisy - in process.
f. WGV20 (X-end) Oversize O-ring groove - in process.
g. WGV16 (X-mid BT) Missing belts - in process.
h. WGV18 (Y-mid) Started.
2. PSI is in the last bake in the LVEA and has started to think
about sending people down south. Stu Motew's last day at Hanford is
today and he will leave shortly for Livingston to begin commissioning
the clean air supplies. Russ Wooley has also been asked to give
notice on his apartment. Rich Bagley, John Flinn, and Don Hillier
will stay on here for the time being.
3. Installation activities:(Kyle Ryan)
X-arm end station:
PSI is revisiting the suspected leak
in the 80K pump. This leak has been
somewhat intermittent so they have
tried to aggravate it by "shocking"
it thermally. Hopefully, this will
cause it to leak consistently (if it
is real) enough to pinpoint it's loc-
ation.
X-arm mid station:
John Worden and I witnessed the cycling
of X1's VE 44" gate valve. John is sat-
isfied with this valve and PSI will re-
connect the spool to this valve and "but-
ton it up.
Corner Station:
The heating of the vertex section should
be completed by noon tomorrow. PSI will
begin the process of relocating the bake
stuff to the X-arm end station shortly
thereafter.
Y-arm mid station:
Y2's BT 44" gate valve needs to have it's
limit switches adjusted. The spool piece
has been removed already but GNB won't be
onsite this week to perform this adjustment.
Y-arm end station:
The VE 44" gate valve needs to have a bear-
ing replaced. This won't happen until GNB
is back.
4. Livingston Installation (Allen Sibley)
PSI has completed the installation and alignment of all vessels in
the LVEA
and VEA. The vessels are not grouted as yet, but are ready for it.
We continue to have difficulty with turbo pumps shutting down, but
this has
caused no serious problem to date. We have requested that CBI aid LIGO
in
keeping a log on restarts. The turbo in the LVEA did not restart on
the
last shut down, and was replaced with one of the PSI pumps. We were
able to
adjust the control electronics and restore the down turbo to operation.
CBI has started to move roughing pumps to the Y arm and will be installing
them
soon.
WBS 1.1.2 Beam Tube (Jones)
a. Livingston Installation
Work is continuing toward
taking the first accumulation
data for acceptance testing
of the X arm modules. Problems
with the data acquisition
system are being repaired, and
software problems with a
replacement RGA are being worked.
Otherwise, the equipment
is ready for test.
One of the four turbo pump
carts has failed to restart after
a power failure last weekend,
and was replaced with a spare
cart that PSI had shipped
in. The failed cart has been
progressively worse in restarting,
and evidenced some vibration
before dropping out. Svoboda
is performing an alignment tuning
procedure with oscilloscope
in a repair attempt. If that doesn't
work, it will be returned
to Edwards. CBI will start moving the
roughing pump carts to the
Y arm this week in prepartation for
pumpdown once completion
of testing on the X arm releases the
power equipment.
The direct GPS measurements
of module alignment have been
completed on module X1,
and 40% of the control supports have
been measured on X2. So
far, all of the measurements that have
been post processed have
been within the +/- 5 mm tolerance
allowed. CBI is considering
our request that they give us both
the original layout alignment
data for all supports and the
direct GPS measurements
for the 64 control supports. Nine of
the 32 enclosure penetrations
required on the Y arm have been
installed. Alignment work
is expected to be completed by the
end of July. When modules
are completed, the local surveying
firm will be tasked with
QC checks for confirmation.
b. Meetings Held
The Livingston Completion
Review was held on 7/1/98. The various
types of records were discussed
and suggestions were made for
the most efficient way of
utilizing these. Records appear to be
free of the legibility problems
that existed with the Hanford
submittal. Records are being
transferred to LIGO at Livingston
and the DCC. Certificates
of completion were received for the
four Livingston modules,
with open items for alignment, leak
checking, and some grouting
of termination supports (being
conducted now). Of the 400
tube sections fabricated at Magnolia
Beach, 51 were "slick" tubes,
not requiring any spiral weld
repairs after coming off
the mill (Hanford had approximately
20 slick tubes). Normally,
stops/starts and cutoff vibrations
would require manual weld
repairs on each tube section, some
requiring over 20 repairs.
LIGO had no requirements on slickness,
but this became an item
of pride for the work crew.
The monthly Project Status
Review was held on 7/1/98. Leak
testing and alignment were
discussed (reported above). Balzers
is still having a problem
finding fiberoptics hubs that will
work for the primary module
leak location technique. CBI is
giving LIGO an internal
purge dam and an orbital welder ring
to assist in the event that
we need to reweld a tube (such as
the possible removal/replacement
of the X midstation valve).
The fitup fixture had already
been purchased. Most of the
equipment purchased from
CBI will be stored in the Livingston
warehouse until needed elsewhere;
the helium mass spectrometer
and expansion joint purchased
for Hanford will be sent soon,
and the QT pumping system
and coupon measurement system will
likely be shipped directly
from Plainfield to MIT when MIT is
ready to receive it. There's
not yet a purchase agreement on
the QT equipment, but it's
likely. CBI showed drafts of the
posters they've prepared
for the site visitor centers, and
comments were given.
Hanford Construction (Otto Matherny)
Levernier submitted a plan of action
where the 17 outstanding
items will all be completed by the end
of July 98. Three of
the 17 are already complete.
The largest of the outstanding items
is the completion of
the FMCS.
OTHER ITEMS
1) Held a pre bid conference for the construction
of the
new building. Because of
several pertinent questions
need to be clarified an
amendment will be issued this
week.
2) Peter Hughes, Caltech internal auditor visited
for two
days this week.
3) Our clean room man lift arrived on site.
Livingston Construction (Gerry Stapfer)
The drought continues at Livingston. At this time we have lost all
of the grass which was seeded to
achive errosion control. As the rains will eventually come back, we
will have to re-seed the corner
station.
Bernhard Mechanical is continuing the re-work on the coils for the
HVAC system.
The power to the site is being worked on by Demco as they have started
the installation of a
substation. At the present time, the chillers still tripp off during
most nights and have to be
manually reset in the morning.
Date: Thu, 02 Jul 1998 20:05:46 -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 are still waiting for a new tube for our laser. Spectra had
intended to ship one last week but encountered some problems.
They are
now promising to Fed-Ex a tube today which, given the Institute holiday
on Friday, should arrive on Monday. In the meantime the power
output
from the laser is so miserable that we are not trying to do anything
with the interferometer and instead are working on other tasks.
In
particular Jamie has now completed his design for the beam shutters
and
has fabricated all the relevant pieces. He is just completing
the
final touches with a view to having everything baked ready for
installation whenever we next vent the system. He and Dick are
now
working on the bench tests of RF induced heating effects in the Pockel
cell material. I am trying to start overhauling some of our out-of-date
documentation.
----------------------------------------------
Interferometer Sensing and Control -- M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
General
--------
Parts continue to arrive for the IAS optical lever, video and chamber
illumination systems. We discovered that about four purchase
requisitions (two for fairly time-critical parts) fell through cracks
in the procurement chain in April and May; we are scrambling to get
workarounds in place where needed, and have enlisted Dennis C's help
to plug the hole in the system.
MZ completed and delivered updated performance milestone table, revised
EAC, and statused ISC fabrication plan for end of June. EAC now
includes contract labor through February '99 (+0.5M); but with about
35% of IAS components committed so far, we're doing somewhat better
than we budgeted on hardware (-0.1M so far). Still trying to
understand allocated actual costs for design accounts.
MZ and others are also working on documentation for ASC and LSC FDR's
later this month.
Finally, our paper on LIGO alignment has been accepted by Applied
Optics.
ASC optomechanical design (Zucker for Mason)
---------------------------------------------
Completed final design, optic/coating selection
and bill of materials for IOT7 assembly.
LSC design (Fritschel/Mavalvala)
--------------------------------
o Detection mode servo design: For the Michelson and recycling cavity
servos, we added a design for a feedback path to the test masses,
which is used to damp these TM degrees-of-freedom at the pendulum
frequency. The detection mode servo design is now complete.
PNI digital signal processing test (Fritschel/Daw)
--------------------------------------------------
o Last week we reported that the phase noise as measured with the
digital loop was a factor of 2-3 higher than with the analog loop
in the 100-500 Hz band. We discovered that most of this excess was
due to non-linear noise production in the analog front end of the
digital loop; we were able to eliminate it by inserting a low-pass
filter right after the mixer. Thus in the end the phase sensitivity
of the instrument was essentially the same for the digital and
analog Michelson control loops.
# DHS: GOOD NEWS.
o This week we have disassembled the PNI; today two of our
chambers are being loaded on a truck bound for Caltech.
# DHS: Good news that this was not too soon to
get important results out of
the machine. Sad to see the machine come apart.
-------------------------------------------
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
------------------------------------
P. King, R. Abbott, and J. Camp met with J. Kmetec, D. Wallace, G. Truong,
and F. Adams for a kick-off meeting of the 10W laser production/enhancement
contract at LW on June 30. The following subjects were discussed:
1) organization of advanced products group (APG) at Lightwave: Jeff
Kmetec
is directly in charge of this group which will develop new products
in the
long term interest of LW. The LIGO 10W laser (now the LW Series 600
MOPA) is
the 1st product to be delivered by this group. Other APG projects are
being
undertaken. The APG group is under Dick Wallace, who is a LW vice president.
2) production and testing of lasers: we expect a 10W laser delivery
roughly
every 3 months from now for 1 year, including 2 option lasers and 2
production lasers. They are all being assembled by G. Truong, with
some
assistance from W. Weichman. T. Kane will participate in the acceptance
testing. The acceptance testing for the production lasers includes
most
measurements from the LIGO deliverable testing except for phase noise
measurements.
3) enhancements: we presented the following list of enhancements
desired
by LIGO, in rough order of priority: 100 ft. cooling hose length, additional
room between the MO and amplifier for a 2nd pockels cell, a modest
increase
(10-20%) in output power, intensity stabilization through diode current
control. R. Abbott presented the work done by him and P. King so far
on the
diode current control stabilization and current to intensity transfer
function
measurements, which was very well received by LW and generated enthusiasm
on the part of LW for this enhancement. LW agreed in general to the
list and
will send us a proposed timetable in the next couple of weeks so that
we
can start to work out a schedule and milestones for the enhancements.
4) reporting: we agreed on weekly email summaries, 2 pg written monthly
reports, and quarterly meetings to assess progress.
Prestabilized Laser -- Peter King
--------------------------------------------
- The new VCO/rf amplifier combination has been used to drive the frequency
shifting AOM. The AOM has a single-pass diffraction efficiency
of 91% and
requires approximately 1.25 W of rf power.
The 10-W laser has been locked to the reference cavity
using the
new frequency shifter layout. Currently work is continuing to
make the
frequency lock as robust as possible, including decreasing the time
required for the laser to acquire lock to the reference cavity.
Input/Output Optics -- Dave Reitze, UF
----------------------------------------
Weekly Report for the UF-LIGO group.
Submitted by Guido Mueller.
David Reitze and David Tanner are both away this week, so I am sending
the
weekly report.
Qize Shu:
The bullseye detector head boards were under another round of fix and
test. One faulty capacitor was found to be responsible for the low
Q of
one channel. The boards are now tunned to a Q about 8 and RF phases
are
matched to within 0.1 degree.
Rana:
Was gone most of the week. Other than that spent time working on
calibration of the head board.
Sany:
We measured thermal lensing in the faraday rotator in a vacuum as a
function of the YAG power. The power dependence does not show difference
from the in-air-case.
Parts:
Commercial parts for the IOO continue to come in. GO has shipped 7
3"
steering mirror substrates to UFl.
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
The acceptance testing of the IR interferometer, originally scheduled
for
the last two weeks of June has slipped to July 7th. The test
duration is
expected to be roughly three days.
The clean room enclosure is installed in the IR metrology lab.
The lab
will be ready for the IR interferometer when it arrives. Our
summer
student has begun work on the Matlab analysis routines. Delivery
of the
interferometer mount is scheduled for July 9th and delivery of the
test
mass mount is scheduled for July 16th. Overall there appears
to be a two
week slip in the measurement schedule.
We now have 3 of the 2ITMs and 3 BS from CISRO, one more BS has been
shipped and the final 2ITM is in final polish.
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
REO Contract - COC's Coating: SPETM02, 03, 04 and 06 had been coated.
According to REO, there were a higher number of coating defects on
these
four substrates than on any of the previous COCs. Some of this may
be due to
problems with the cleaning process prior to coating. However, there
is a
markedly lower quality to the coatings on these four optics which may
indicate that there could be problems with the substrate surface itself.
We've received SPTM02 and 03. We'll inspect their surface quality soon
to
try to make an assessment.
Indium Seals: First intent was successful, we were able to seal the
magnet
to the dumbbell and this assembly to the glass. However much remains
to be
investigated such as: sealing pressures, optimun indium thickness,
integrity
of the seals and effects on the mirror's Q.
Core Optics Support -- Michael Smith
------------------------------------
PO TELESCOPE MOCK-UP/PROTOTYPE:
Machined parts for the prototype gimbal assembly have been received.
The
drawings for the secondary mirror mount have been sent sent to an
outside shop for prototype fabrication, and should be completed within
one
month ARO. K. Mailand is finishing up the detail design for the entire
PO
telescope. J. Kern has placed orders for all of the hardware needed
to
assemble the mock-up and prototype telescopes.
BEAM-DUMPS:
A. Badalian has sent parts drawings for a prototype double
beam-dump to the CIT shop. M. Smith has completed an analysis of fringe
wrapping due to the large motion of the beam-dump structure. This does
not
cause a problem with the scattered light budget, provided the Q of
the
structure is limited to ~100 and the resonant frequencies of the total
structure are chosen propitiously. The mounting structure for the beam-dump
has been determined, based on the analysis.
3D MODELING:
Angel has almost completed a 3D layout of the sequence BSC3-BSC7...WB9A
in
order to determine the mounting of the large baffle in WBE5 and to
confirm
the clearance of the ISC optical lever beams entering at spool WA1A.
COC WEDGE ANGLE TOLERANCE:
D. Rose is using ASAP to calculate the range of elevations of the PO
beams
and Ghost beams, due to the tolerance in the COC wedge angles.
TEST EQUIPMENT: 1)IR AUTOCOLLIMATOR
J. Kern has established the feasibility of modifying a standard tooling
autocollimator to incorporate a 980nm IR laser diode illumination source
and a photometric CCD camera output. A sample CCD camera is being obtained
for evaluation, and a 50 mW IR laser diode will be purchased to work
out
the details of the modification with an appropriate vendor.
STEERING MIRROR MOUNT TEST:
J. Kern and M. Smith are still testing short-term repeatability and
long-term
stability of various commercial mirror mount candidates for the PO
steering
mirrors.
--------------------------
Isolation Group -- M. Fine
--------------------------
Seismic Design (Mike Fine)
--------------------------------------------------------------------
1. Coarse Actuation System:
The first bench testing of the pneumatic valves was conducted
last Friday at Hytec. It was a very simple test to verify they performed
according to the manufacturers' specifications. The remaining pneumatic
components for the CAS system have arrived at Hytec and are being
integrated into the electronics cabinet and onto the BSC components.
The 1st article air bearings arrived at Hytec this Monday and are
being integrated with the rest of the coarse actuator system for
for the functional test next week.
2. In-Vacuum Hardware:
The BSC support tube and leg element hardware is being shipped to
Los Alamos on Monday and expected to arrive at Hytec tomorrow.
Suspension -- (Janeen Hazel/Mark Barton/Mike Fine)
-------------------------------------------------------------------
1. LOS Welded Structure:
Janeen will be visiting Brookfield on next Thursday to go over the
fabrication issues on the 1st artilce with them.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Global Diagnostics System
(Rolf Bork, Paul Govereau, David Shoemaker, Daniel Sigg)
--------------------------------------------------------------------
Progress was made in programming the interface layer for setting
test points in digital servo loops (using remote procedure calls to
a service routine running on the diagnostics system controller). The
final coding will have to wait until the reflective memory organization
is finalized by CDS.
M. Pratt's leave of absence triggered a rethinking of the diagnostics
system software development effort. With the demonstration of a working
excitation engine at the PNI we were well on track to meet our goal
of
implementing a 'digital' swept sine test routine by end of the year.
However, it is clear that we have to replace the 'lost' person-power
if we want to finish the system in time. Two options were discussed:
getting another physicist involved (long term solution) and/or hiring
a contract programmer (short term solution).
Physics Environment Monitor (Alex Marin)
-------------------------------------------
The broken NI DAQ board has been repaired and is now at MIT. It
will be
installed into the PEM PC at the first trip to Hanford. More work has
been
performed in the evaluation of the various accelerometers and signal
conditioners combinations. A short memo has been written and submitted
for
comments to PEM members as well as interested parties.
The faulty SRS function generator has been returned
from the vendor in
working order. Mark Pratt had tested it before he left and the RS232
port funtions properly now.
The drawings for the PEM interface plates(BSC and
HAM) were modified to
accomodate the new Wilcoxed accelerometers mouniting requirements.
A
number of PEM drawings were upreved after first article changes and
sent
to the DCC for filing, after the DCN is received.
Optical Contamination (Daqun Li)
--------------------------------
Cavity two containing viton seals has been locked with initial cavity
total loss of 132.13 ppm and absorption loss of 1.17 ppm. However,
the
ion pump seems not functioning properly and we are investigating this
matter right now.
Exposed cavity one containing teflon wires to moisture because there
is
a possible chemical reaction between teflon and water producing
hydrofluoric acid (HF). We plan to requalify teflon after moisture
exposure to rule out any possible HF contamination;
The third contamination cavity system is being constructed.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
Suspension
==============================
- Received sensor sctuator heads from Oliver for the IOO suspension
systems.
They will be given to Yehuda for cleaning.
- Received kapton cables for IOO systems. Connectors will be attached
and
them
cables will be given to Yehuda for cleaning.
- SOS controller boards are due 7/1/98.
- Satellite module testing is complete. Chassis fab has been started.
The
board
artwork will be updated and the production run started.
IOO/ASC
===============================
- WFS Demod boards received from board house. The first is being stuffed
and
will be tested next week.
- WFS Photodiode boardsa are due back next week.
- Mode cleaner alignment servo module layout is complete. Quotes for
board
fab
will be obtained.
- Optical lever PD board layout is complete. Quotes for board fab will
be
obtained.
- MC ASC whitenning board layout will be started next week.
- MC steering mirror board layout continues.
Input Optics:
=============
1) Due to a SNAFU in ordering the PCB for the EO Shutter Control
the board
will not be here until next week. We have the chassis in hand.
2) Have established an agreed upon set of modifications for the LSC
photodiode modules. Joe will begin implementing these changes as soon
as we
are finished with RF tests in the lab. We are optimizing the RF shielding
and isolation with these tests.
Timing Systems:
===============
PCB layout design is beginning for the Level 1 and Level 2 fanout modules
as
well as the clock test module. We have received the first 11 GPS slave
modules from Brandywine.
Control room / Networking
=========================
- Still waiting approval from NSF to use GSA for purchasing control
room
furniture.
Data Acquisition
================
- Trouble finding right angle differential LEMO connectors for DAQS
interface
chassis and various control system modules which feed signals to DAQS
(earliest
delivery October due to European plant shutdown for month of July);
searching
for alternatives.
- Received the SUN software drivers for the reflected memory; initial
tests
look
good. Software development begun on final system.
| CR-980019 | WBS 1.2.1 | Development and Qualification of Core Optics Components (COC) Cleaning Procedures | J. Camp |
| CR-980020 | WBS 1.2.1 | Additional Lasers and Laser Support | J. Camp |
| CR-980021 | WBS 1.2.1 | Laser/Optics Staffing | J. Camp |
| CR-980022 | WBS 1.4.1.2 | Project Controls (5N502) Actual Costs and Estimate-to-Complete | P. Lindquist |
| CR-980023 | WBS 1.1.4 | Hanford Electrical Power | F. Asiri |
| CR-980024 | WBS 1.4.2 | Support Services | P. Lindquist |
| CR-980025
CR-970020 (Revision A) |
WBS 1.1.3 | Beam Tube Enclosure, State Sales Tax Negotiations | F. Asiri |
| CR-980026 | WBS 1.1.4 | Civil Construction, Livingston, Hensel Phelps Closeout | F. Asiri |
During the first half of 1998, a total of 3,398 documents were added
to the database. The following figures represent
the breakdown by category:
| C | Contractual/Procurement | 1915 |
| D | Drawings and CAD | 500 |
| E | Engineering Documentation | 104 |
| G | Graphics/Presentations | 322 |
| L | Letters | 378 |
| M | Management/Policy | 104 |
| P | Publications/Formal Notes | 6 |
| T | Technical Notes, Informal | 69 |
ACTIVITIES
No report this week
No report this week.>From: James Rianda <jrianda@ligo.caltech.edu>
Date: Thu, 2 Jul 1998 16:56:36 -0700 (PDT)
From: Albert Lazzarini <lazz@ligo.caltech.edu>
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, BB, CC, JK, DC)
__Integration Planning:
Draft Cable Tray Specification
Bill Baldwin issued the draft cable tray spec for review.
Comments due by 8 July. He will turn in a draft SOW (technical
and
schedule requirements only) by close of business 2 July.
__Analyses: Nothing to report
__Reliability:
Klohoker met with Mike Smith, Core Optics Support (COS) Cognizant Scientist,
and reviewed his recommended spares list with him. Mike reported that
there have been some changes and that he'll provide John with an updated
list. Klohoker used the spares list available and finalized the Draft
of the
COS section of the Maintenance Plan.
In addition, Klohoker started preparing the front material for the maintenance
plan and establishing its overall structure and format. I have created
a book file in Frame Maker for the entire Maintenance Plan. The
maintenance activities for each LIGO system will be addressed in
individual sections. These sections are stored as FM document files
within the book. Breaking the document up in this manner will make
it
easier for future editting and appending (hopefully).
__Integrated Layout/Drawings:
ASC LEVER LAYOUT
The lever beam path layouts in spools numbers BE-5
& BE-6, and
BSCs # 3 & #7 are nearly finished and I understand
the Louvre
Baffle final design will be started sometime next week.
WASHINGTON OPTOMECHANICAL ILDs
The Mid & End Station xrefs are still on
temporary hold
waiting for input from the various groups (IOO,
ISC,COS).
PSL/IOO XREF LAYOUTS FOR ILDs
New plan layout for the PSL/IOO Optical Tables &
Hams 1,2,7, &
8 (4k & 2k) are finished. Elevations need some
minor
adjustments for completion. This will be pursued after cable tray
layouts are finished.
OPTOMECHANICAL ILD LAYOUTS
Work has been pushed back, however as soon as a few
more
layouts are updated, the Opto-Mech ILDs will be
revised to
next engineering release as well as being presented on the new (minor
changes) drawing template.
CABLE TRAY LAYOUT ILDs
The rough draft of the plan is finished and the package
of 21
documents is in the process of review, although
the elevations
are not finished. Hopefully elevations will be finished in the
next
week or so.
SEISMIC TABLE BALANCE WEIGHTS
The 52 finished pieces were shipped yesterday, Wednesday
and
are scheduled to arrive in Hanford today.
PSL/IOO OPTICAL TABLE COORDINATE LAYOUTS
Plan drawing was sent to Hanford but new requirement
is that
the Monuments be added to drawing, and an elevation
of the
table heights also be done. Drawing was finished this morning
and is
now in the process of being released.
__Mock-ups:
ELEVATED PLATFORM FOR MOCK UPS
Layout of a platform which attaches to the flange
of the HAM
chamber, has been delayed due to other priorities.
Will not
have a sketch suitable for a wood mock up until approximately Thursday,
7/9/98.
1.4.3.3 Modeling & Data Analysis (KB/HY/AL)
Hiro:
Mode implementation
Adlib supports new data types, "field" representing both single and
multi mode field, and three vectors, "vector_real", "vector_int" and
"vector_complex", representing vector values.
All modules are modified to adopt a new data "field" To make them
do
special for multi mode, each one needs to be mofiedi. A few of
the
optics modules, field source generator, power meter and demodulator,
have been modified for multi mode fields. The design of the
photo-detector and demodulator has been discussed. The specification
of
the detector can be fairly arbitrary. The explicit formulation of this
detector will be written down in the e2e document soon.
Adlib
A generic module-to-module data passing mechanism has been
implemented. One can specify the destination by module types
and/or by
the names - module name or partial or full pathname.
The user can save all settings and inputs to a file so that one can
save the running condition.
Steady state fast simulation
Jacob (undergraduate, last year's SURF) started working to implement
fast time domain optics simulation for the in-lock state. This will
be
based on the frequency domain model twiddle. First twiddle will be
ported to C++. Using this code, for the given optics configuration,
necessary transfer functions are calculated and fitted by zeros and
poles. Then the digital filter with these zeros and poles will be used
to generate the time domain simulation for the in-lock state.
Alfi
Alfi has been updated for upcoming adlib. The new one supports more
data types, including "field" which represent a generic field
representing both single mode and multi mode field. The design is
changed so that the line color representing different data types can
be
easily changed.
Tutorials/examples
Complete examples of modules in C and C++ are now completed. Fortran
continues to have some problems when needing math fuctions. This is
still being investigated. All support files for the tutorial
documents
and examples are available in /home/e2e/Software/examples/
(somes are
not yet there, but coming).
Giancarlo Cella
He will visit LIGO at the end of July for one month to work the
modeling of the mechanical parts.
Misc
Ed Maros started work on getting sadan backuped to CD-ROM.
Kent is out this and next week. He has started working with the new
software people (Philip Ehrens and David Farnham) to begin implmenting
the software system design for LDAS. Phil is the TCL/TK programmer;
Farnham will be doing the C/C++ coding. We are about to hire a database
programmer also.
Serap Tilav is talking with Daniel Sigg to see what role she can play
in doing some of the work Pratt had committed to doing; Walid Majid
will also
likely get involved in this activity to support Sigg. In addition,
we
are looking for a programmer who can work with Sigg at Hanford.
Bruce Sears: Summary of weekly activities, week of 6-29:
* Study of XML as a possible standard for LIGO metadata
description/distribution format.
* Began design on prototype of LIGO metadata system
of databases and services.
Anderson:
Working on getting the data acquisition Ultra/2 with the RAID box
talking to the ATM network and getting the LIGO ATM switch to talk
to
the CACR ATM switch.
Stuart also reports:
cdssol9 is now directly on the ATM network as, 131.215.???.???
I have added /etc/notrouter so it will not route unless you delete that
file. I also commented out the /usr1 entry in /etc/vfstab so it will
boot cleanly without human intervention.
The root partition was sucessfully increased with growfs to allow the
FORE driver to be installed. The root partition now includes the entire
128MB former swap partition. There is currently NO swap space assigned
on cdssol9, probably a good thing on a real-time data acquisition
computer as it minimsizes large disk access latencies. However, if
you
want to add some more virtual memory, just run mkfile in / or any other
filesystem and add the entry to /etc/vfstab.
I have also mounted the RAID box read-only onto the Ultra30 in case
we
want to run any more multi-host SCSI tests.
Also, the CACR ATM switch is now working, and as an initial test has
been configured to allow my desktop machine to talk through both the
LIGO and CACR switches to get to HPSS. There are several open issues
on
how to get all the "routes" setup between the two switches and the
various CACR computers, but we at least have a simple link up and
running before all the equipment is broken next week when CACR starts
their move to a new machine room.
AL NOTE: On-line Data Analysis System: S. Anderson
gave a briefing of
his findings on RAID performance to the LDAS
group, including R. Bork
from CDS. As a consequence of his experience,
it was decided to opt
against a RAID system as the on-line data storage
system. Instead a
high-end SUN server (4CPU SUN/450 plus ~1GB RAM
plus ~20x20GB UWFSCSI
drvies) would be a better investment. Such as
system can be
installed/procured incrementally as we grow into
it and can be
partially mirrored (== RAID level 1) to protect
against on-line
hardware failures.
COLLABORATIVE RESEARCH (LS Finn, Mohanty, Mukherjee, Romano)
Sam has completed his sabbatical visit
Date: Thu, 2 Jul 1998 17:01:23 -0700
From: soma@ligo.caltech.edu (Soma Mukhevjee)
I ran a numerical experiment where I added some known white noise to
raise the floor of the narrowbanded data to the original dB level as
was present in the base of the peak (such that the modified data follows
the model more closely). This was then passed through the Kalman filter
to obtain the estimate. The estimate was narrowbanded and subtracted
from
the original data. This gave back the spectrum with the estimated line
subtracted from the spectrum. However, the residue smoothly joined
the
spectrum and no notch was left behind. I have tested this method extensively
both on simulated data as well as on the 40 meter data. The justification
of this method rests in the fact that the Kalman filter estimates the
signal alone and not any background noise associated with it. Thus,
the
addition of an extra known white noise does not corrupt the estimate,
but
comes to the advantage of mimicking the model without disturbing the
original spectrum. I ran further tests to resolve any doubt about the
added white noise being returned to fill up the notch. Apart from comparing
the power spectra, I also looked at the correlation between the added
white
noise and the residue left behind after filtering. The residue does
not
correlate well with the measurement noise, nor does it reflect the
added noise. Just around the central frequency, the residue shows a
rather strong correlation with the process noise, but smoothly blends
with the rest of the spectrum at the side lobes. This behaviour is
not
surprising considering the fact that at \omega_0, the process noise
dominates
the measurement noise by a factor of several tens of dBs and thus the
measurement noise has an insignificant role to play. However, as the
peak
falls and the measurement noise starts to dominate once again, the
Kalman filter estimates the states smoothly. My own feeling is that
the residue does not alter the statistics of the background significantly.
Going back to the issue of including the effect of narrowbanding in
the state space equation itself, I have come across a nice way of
converting the digital filter in the state space form. I am now in
the
process of modifying my state space equation so as to include the filtered
output in the program. I am preparing a note on this work.
For a general interest, I would like to let it be known that the following
paper is accepted for publication in Astrophysical Journal on June
15 '98 :
"Three types of gamma ray bursts" : Soma Mukherjee, Eric D. Feigelson,
G.J. Babu, Fionn Murtagh, C. Fraley & A. Raftery.
2 Jul 1998
----------
As reported earlier, I have found a way to convert digital filters
in state
space form (using matlab). I could incorporate the filter in my state
space
equation itself. Thus my state space equation represented a thermal
line
filtered through a bandpass filter (as one would deal with in case
of real
data.) The data was narrowbanded using the same filter as was incorporated
in
the state space equation. Initially I started experimenting with IIR
filters
(mostly to avoid using large number of coefficients of FIR filters).
However,
I noted that IIR filters need a rather broad stopband over which the
attenuation
is reached. Attempts to reduce the stopband does not work as the impulse
response of the filter becomes infinitely large. Using a large (~30
Hz) stopbandworks well for
simulated signal and subtracts the mode leaving behind the
residual measurement noise. However, this does not work for the 40
meter data
at all. I moved to the FIR filter, using the same method as mentioned
above. I
am in the process of experimenting with the noise inputs for the best
estimate
of the signal. This involves obtaining the estimates from the amplitude
and
width of the line.
Date: Thu, 2 Jul 1998 17:03:28 -0700
From: mohanty@ligo.caltech.edu (Soumya Mohanty)
devoted most of my time to finishing up the first draft of the GRB paper
that I am writing with Sam and Joe. It's nearly ready now. I also finished
my calculations regarding the toy model that would be a prototype for
the
seismic stack module. Now the transfer functions need to be converted
into
digital filters. The transfer functions are not in the pole zero or
rational form so I have been reading up some basic filter design literature.
I am also writing up the work that I have done on the SEI/SUS module
so far.
1.4.4.2 General Computing (LW/TE)
MIT:
1. Ordered an HP LaserJet printer for use in the new building.
2. Upgraded to Mathematica version 3.0.2 for compatibility with Solaris
2.6.
3. Ordered an additional 9Gb disk and a tape drive.
4. Continuing to plan for our move to the new building.
Livingston:
1. Continuing the setup for the mail/www server.
2. Received the additional 24 port board to be installed in the FORE
3810.
3. Resolved multiple e-mail issues.
4. Tracking down the orders for an Ultra 30 and a UPS unit.
Hanford:
1. The General Computing server's Operating System software
has been upgraded to the latest version of Solaris. Mathematica
3.0.2
is now installed and running with the correct fonts on all Unix
machines. A fix has been found to get it working through Exceed
on the
PCs, but it requires loading all the font files onto each PC that will
be running Mathematica. Easier fixes are still being explored.
We now
have a set of user and sys. admin. documentation for Mathematica.
2. The testing T1 subnet has been installed and setup on the Cisco
router. The setup will be used for real time testing and working
on
getting some of the logistics worked out before the DOE/NSF MOU is
signed off. The class C subnet was split so both ports of the router
could be used and tested. The new host names are also being used as
the
units are being moved over.
3. An additional 24 port ethernet hub for the GC ATM network has been
installed. This will allow me to connect the optics lab and vac
prep
area wall jacks to the GC network. We previously had one 24 port
hub
for the GCnet which was completely full. With the addition of
the T1
line subnet, this new hub will be divided so that 8 ports will be
dedicated to the T1 line subnet.
4. Work has continued on the General Computing Conceptual Design
document, on the inventory of the GC equipment and software, and on
the
Solaris Sys Admin training. Received a quote from Sun for renewal
of
the GC server Service Contract. The PO for the tape robot system
has
gone to the vendor, it should arrive in about 30 days. I'm (Christina
P.) tracking the status of the Sun Ultra 10 workstation Larry Wallace
ordered for us back in May. I have also made a new friend at
IPAC down
at Caltech. It seems Sun has been shipping her computers to our
address. Unfortunately, they have not shipped our computer to
her!
CIT:
1. Finally, received a temporary license for Matlab. Mathworks has
received the PO and should be sending the new licenses in a few weeks.
2. Tracking orders for SUN equipment. Partial orders have been received
but the monitors are useless without the CPU units. A few more ULTRA
10's are going to be ordered to accomodate new users.
3. The order for the server replacement is in process. SUN should have
the PO by monday.
4. There have been some networking problems with the PC's (laptops).
If
the modem TCP/IP protocol is installed before the regular TCP/IP
protocol not all of the network connections (SAMBA is one) work
properly. Installing the ethernet TCP/IP protocol first appears to
eliminate the problems. However, testing the modem connection after
the
change has not been performed as of yet.
5. It appears that Jay H. has resolved the PC problem with the PC
hanging all of the time. Replacing the CD player on the unit
seems to
have fixed the problem. He has not had the unit go down for some time
since the replacement.
6. Samantha is in the process of updating the documentation showing
the
GC computer layout for LIGO at Caltech, Hanford and Livingston. Work
will be done on the MIT computers after the move.
7. Albert L. has been working on getting the MOU signed off. After a
meeting with the DOE and NSF it appears that once some issues are
resolved we may be back on-line. There was a telecon among: DOE ESnet
Program Manager, NSF/LIGO Program Manager, lawyers from btoh sides
and
Lazzarini. The wording of the MOU has been completed; details of how
the reimbursement takes place (magntiude has been defined -- question
is who pays whom) need to be worked out. We may have a signed MOU by
summer's end...(Note, however that just yesterday Lazzarini told Barish
it would be completed by next week...)
8. For the web site: (Barbara K.) - made a number of quick changes that
accumulated last week while I was away - completed 2 more iterations
of
the new home page. Am waiting for comments.
9. Made a couple of small changes to the Outgassing application in MS
Access.
10. Began working on the changes to the DCC system to support Traveler
forms.
11. Memory upgrades performed on a few machines.
12. M. Barton's PC in sub-basement was hooked up in the network
enabling him to take data with his experiment and access it remotely.
13. Monthly back-ups of the systems (ligo, kater, gsparc) and home
directories are underway.
14. Multiple new user accounts have been created along with
modifications to existing accounts.
15. Ran more networking cables and working on additional connections
to
the 40M.
16. More orders for equipment have been placed for the move to
Millikan. The date for the network fiber run has not been locked. It
all depends on how things go with the network switch-over in Booth.
17. Working out the issues to get everyone moved to Solaris 2.6. It
appears that the two applications that will have problems are
Mathematica and IDEAS. The upgrade for IDEAS has arrived and
Mathematica upgrade will have to be ordered. The upgrade to 2.6
will
require a full reload on some of the machines. Solaris 2.6 requires
a
larger /usr partition than 2.5.1 and some of the machines do not have
enough resources to run the upgrade program though a build from scratch
will work.
Rita Torres
For I. Petrac did change orders No. 2 for March Metalfab,
O. McCullough, and Veeco Corp. Did change order No. 3
to General Optics, a JPL Work Order, and updated MIT
Chronology.
Familiarized myself somewhat with CIT library system
to obtain copies of articles for G. Billingsley and
M. Hrynevych. Have obtained a card to facilitate
photocopying at the libraries.
Scheduled two more eye exams and pursued related
paperwork. Completed name tags to place at cubicles.
Printed more labels for Y. Kommemi to use in packaging
and shipping at the lab.
Distributed: Change order No. 2 to March Metalfab,
change order No. 26 to MIT, change order No. 2 to
M. McCullough.
Dorothy Lloyd
Began reconciling March Status Reports.
Entered AP30 reports into the database.
Continued processing the constantly growing requests for PR's.
Processed POs, Change Orders, Check Requests, etc. as well as an extremely
heavy load of invoices.
Followed up and tracked many problems with invoice payments.
Continued to monitor and support the temp. Provided clerical
support were needed.
Irene Baldon
Arranged and processed the paper work for 12 trips. Worked on
the ever present backlog of Expense Reports and completed a
significant amount.
Performed miscellaneous duties as requested by various members
of the LIGO Project here at Caltech, as well as for members of the
staffs of each of the two (2) sites.
Prepared and distributed the Weekly Travel/Vacation Itinerary Report
for LIGO Staff and Visitors.
Processed Student Payroll, incorporating various recent changes,
new hires, terminations and the processing of Vacation/Sick Leave
accounting
Elizabeth K. Wood
Discovered that someone used the LIGO FAX as a free and easy way to
make
900 number phone calls. I put a 900-block on that line.
All on-campus
lines have 900 blocks put on automatically.
Put Daniel Abrams on the Caltech payroll as a summer hire working with
Jay
Heefner. Put David Djambazov on payroll working with Dennis Coyne.
Discovered that Kent Blackburn was not on the waiting list for a reserved
parking space; JoAnn in the PMA office will prepare that memo
and send it
to parking services.
Took a request from Paul Russell in the Wilson House for more storage,
either in the form of cabinets or a storage shed. They will be
getting
some cabinets and some shelves.
Began the process (through HR) of putting Jennifer Logan on staff payroll.
Continued the process of getting Jill Berry on Caltech's payroll.
Called Sprint and MCI about getting tie-lines to enable phone calls
between
Hanford, Livingston, and Caltech. There are several options available.
I
have only begun getting estimates and gathering information.
JoAnn in the
PMA office pointed out that the tie lines Caltech already has are to
sites
within California (Big Bear, Owens Valley, and Palomar); there
is no
tie-line to the Keck Telescope in Hawaii. I'll pursue this in
any case.
Date: Thu, 02 Jul 1998 16:08:15 -0700
From: Daniel Sigg <sigg_d@ligo.mit.edu>
===============================================================
LIGO Hanford Observatory (LHO) Operations (D. Sigg for F. Raab)
===============================================================
REU Projects:
-------------
(R. Savage)
Summer REU Students
-------------------
PSL CHARACTERIZATION (Janet Casperson)
The early part of this week was spent in trying to understand and alter
LabVIEW's data logger. In addition, I have been taking data on
the power
output of the laser and each of its pump diodes. Unfortunately
we have had
to postpone work in the lab for the rest of the week while the cable
trays
were installed. The remainder of this week will be spent in analyzing
and
understanding the data and any anomalies in the laser's behavior which
may
have occured.
ALIGNMENT SENSITIVITY OF ADVANCED INTERFEROMETER
CONFIGURATIONS (M. Zwikel)
I'm now heading into the period of fast and furious simulation runs.
Early in the week I coded some routines that would allow for quick
&
convenient storage, location, and retrieval of the sensor data produced
in
each simulation. With all the key modules in place, I generalized
my
original notebook to serve as an integrated length and alignment simulation
suite. All variables and parameters are now easily adjustable
from within
the notebook, so all that remains is to start pumping out the trials.
Yesterday, Daniel and I discussed the game plan for what kinds of
simulations should be run. To start, I will be exploring mirror
"break
angles," where misalignment critically degrades the LIGOs error signals.
A
number of degrees of freedom and scan speeds will be considered for
this
and future issues.
PEM support:
------------
(D. Sigg)
The outside temperature sensors have been received. They will be mounted
on each side of all the buildings (total of 20). Installation will
require outdoor cable runs and protection against lightening. Additional
installation equiplement has been ordered.
Bake Oven:
----------
(K. Ryan)
This week we bolted the bell jar to the base plate and
pumped the combination. The overall pressure bottomed out
at 3 x 10-5 torr after 24 hrs. We concluded that approx. 1/3
of the circumference of the bell jar to flange vacuum weld was
leaking (after performing a He leak test).
To resolve this, we had "Jimmy" (Apollo) re weld this
area here at LHO. After bolting it back to the base plate, we
found that the pressure went from atmosphere to 9.1 x 10-8 torr
within two hours. Not bad for an unbaked chamber! Also,
we
have observed that the flange bolts need to be re torqued at
least twice after their initial torquing.
Next week we will pump down the base plate+extender nipple+
belljar combination and try to get power routed to the control
panel (waiting for electrical approval). Baking will follow elec.
approval.
HAM 1st-Article Test:
---------------------
(C. Gray, H. Radkins)
A second Titanium Nitride bolt seized in the Support Tube (no graphite
lubricant was used); this bolt seized upon hand tightening. Several
other
holes on the Support Tube were later tested, and it was observed that
many
bolts tended to bind after 7/16" of engagement. (This could possibly
be
due to contaminants in the threaded holes or on bolts, or it could
be
caused by a slot at the top of the tapped holes which could be cutting
into
the bolt altering bolt thread)
The Support Tubes and Support Table were inserted into HAM 13.
A metal
wire loop was used to suspend end of Support Tube, with seized bolt
in it,
from the Rail System. The other links between the Rail System
and Support
Tube have been fastened temporarily with brass bolts (this will be
until we
get silver-plated bolts). For the Support Tube/Support Table
connection,
brass studs were used (this is also until we get silver-plated bolts).
Compression Clamp assembled onto Bellows. For shipping, stainless
steel
plates and screws were used to secure conflats--one of these, screws
seized. We need to make the plates out of aluminum for the future.
Mark Barton arrived to offer assistance with 1st Article.
During the installation of the Bellows (and Compression Clamp), there
was
spatial inteference with the Crossbeam. The Crossbeam had to
be moved to
give needed space (Crossbeam movement, on dummy stack and adapter plate,
was limited by pin on top of piers). The Support Tube/Bellows
connection
is torqued down on the first Bellows. The E-Nozzle/Bellows connection
still needs to be torqued down. The second Bellows will be installed
(7/2).
Haisheng Rong arrived to assist on 1st Article Test (7/1).
Electronics lab:
----------------
(Richard McCarthy)
Worked with Benton PUD and US West on installation of our Mains power
monitoring device. The system has been install and I am now learning
the
software for data collection. One minor problem is a modem needed to
be
procured for communication. As an interim solution we are using a personal
modem until a Hayes modem (recommended by L. Wallace) can be procured.
Sun River began installation of tripods for lightning protection system.
Optics & Lasers:
----------------
(D. Cook)
We have our overhead cable trays being installed this week in the Optics
Lab. Some Laser Safety items are being added to comply with safety
committee findings. I have been taking particle counts in various locations
and entering the data on a spread sheet. Hopefully this will helped
to
determine whether we will need to cover or coat the concrete floors
etc. I
have a counter set up under the soft wall enclosure in the HAM first
article area. When there is activity present, we see sharp, immediate
increases in particle counts. This is not unusual in itself except
that the
counts seem high for being under a Hepa filtered soft wall enclosure.
The
dirt is either from exposed portions of street clothes or concrete
dust
being scrubbed off by the "booties". The counter is located on the
floor,
near where the HAM doors have been removed. We need to try some variations
in gowning and mopping of the floors to determine the main sources
of dirt.
"Tools are coming! Tools are coming!" We have new tools and tool chests
on
their way for the MID,END and CORNER Stations. We won't have to drive
two
miles to share that same Ol' screw driver all the time. Clean tools
and
boxes are being order soon as well. Some progress has been made toward
getting a shop area setup as well. Several orders for misc. thinge
went out
this week as well.
Computing Systems:
------------------
(C. Patton)
The General Computing server's Operating System software has been
upgraded to the latest version of Solaris. Mathematica 3.0.2
is now
installed and running with the correct fonts on all Unix machines.
A
fix has been found to get it working through Exceed on the PCs, but
it
requires loading all the font files onto each PC that will be running
Mathematica. Easier fixes are still being explored. We
now have a set
of user and sys. admin. documentation for Mathematica.
An additional 24 port ethernet hub for the GC ATM network has been
installed. This will allow me to connect the optics lab and vac
prep
area wall jacks to the GC network. We previously had one 24 port
hub
for the GCnet which was completely full. With the addition of
the T1
line subnet, this new hub will be divided so that 8 ports will be
dedicated to the T1 line subnet.
Work has continued on the General Computing Conceptual Design document,
on the inventory of the GC equipment and software, and on the Solaris
Sys Admin training. I have a quote from Sun for renewal of the
GC
server Service Contract. The PO for the tape robot system has
gone to
the vendor, it should arrive in about 30 days. I'm tracking the
status
of the Sun Ultra 10 workstation Larry Wallace ordered for us back in
May. I have also made a new friend at IPAC down at Caltech.
It seems
Sun has been shipping her computers to our address. Unfortunately,
they
have not shipped our computer to her!
Beam-Tube Bake Out:
-------------------
(M. Lubinski, M. Guenther, K. Stiff and W. Althouse)
Electrical Support Services Contract:
Electrical installation at Y-2 is very near completion. We have
performed
startup testing on the cooling water system of the DC power supplies.
The
power supply(PS-1) has two of three clogged flow paths or hoses that
are
hooked up wrong. We are investigating with Sun River's help and
with
Fermilab's help (the power supplies were tested when we borrowed them
from
Fermilab, but the cooling hoses were disconnected for cleanout before
shipment). The power supply cooling water system at PS-2 works
very well.
We have begun testing of the electrical setup and power supply response
at
PS-2. Initial test results are very good.
Cryopumps:
Three of the 10" VAT valves located at ports Y2-4, 2-6, 2-7 failed to
close
when operated after installation of the cryopumps. When the cryopump
volume
was pumped down for leak testing, the pressure could not be reduced
below
0.05 bar. Larry Jones, Rai Weiss, Bill Althouse, Tom Swain (VAT
representative)and Mark Lubinski are investigating. A valve from
LA site
is on its way to Hanford for inspection/testing. The VAT representative
will be on site Tuesday(7/7/98) to inspect and adjust valves as required.
Data Acquisition and Temperature Control System:
The Bakeout Process Control computer has been moved to the End Station
on Y
arm. The computer will be situated there for the duration of the bakeout.
Work continues on the integration of the I/O Boxes with the bakeout
software. [MSki note: communication boxes have been powered up and
programmed. We will begin to log data from some of these boxes.
However,
we learned this week that there is a problem in the GE software when
operating more than 4 I/O drop boxes. GE has acknowledged this problem
and
is working to resolve it.]
Date: Thu, 02 Jul 1998 15:57:16 -0700
From: Mark Lubinski <lubinski_m@ligo.caltech.edu>
Late input for the bakeout report: we completed
functional testing of both
DC power supplies with a dummy load. Both are
working fine.
Front Office:
-------------
(J. Berry)
This week I have received 19 calls from vendors inquiring status for
payment. For the last two days, Otto and I have been visiting
with Peter
Hughs (Caltech auditor) and he reports that we are doing an excellent
job of
tracking at Hanford. He will be going back to Caltech and try
to work on a
couple of things to help simplify the paperwork here, but other than
that he
was quite pleased with the jobs that we are all doing here.
We have generated 23 PO's, and processed approximately 60 invoices (I
am
guessing at the total since I am still working on them). Celina
has been
helping clean up the files. She has also been verifying that
anything that
is in the files is also in the Access spreadsheet for me. We
will be going
back and entering the few invoices that have been missed.
I am still working on the report form(s) for the account totals that
Fred
and Otto have been asking for. I hope to have these complete
soon.
For additional information about this report, contact sanders@ligo.caltech.edu