The Project Control Meeting
Agenda for Monday, March 30, 1998 will be:
(Meeting time: 10:30 am Pacific Time)
Facilities Weekly Report (submitted for Stapfer by L. Jones)
WBS 1.1.1 Vacuum Equipment (Worden)
1. Gate Valves:
The third X-arm valve in LA is now ready for beam
tube pump-down.
There had been some difficulty in getting the annulus
space evacuated
but after applying air pressure to the actuator,
success was achieved.
2. BSC status:
All LA BSCs are ready to ship.
MIT BSC - Bake complete.
3. HAM status:
All LA HAMs ready for shipment.
MIT HAM1 - Cleaning complete.
MIT HAM2 - Large flanges welded.
4. 80K pumps status:
All 80K pumps are ready to ship.
5. Installation activities:(K. Ryan)
X-arm end station:
The VE has been "roughed" to mid 10E-3 torr
range except the annulus volumes which have
been pumped to 10E-6 torr range. The two CDS
racks which will provide terminations for the
fiber optic cables have been positioned on the
VEA floor.
X-arm mid station:
PSI's sub contractor has begun installing bake
blankets. Same as above for the double CDS
racks.
Corner Station:
Pirani/cold cathode gauge pairs are being installed.
Misc. electrical work including receptacles, gate
valve controllers, signal cabling etc. is continuing.
Installation of purge air header, vacuum header,
water
and instrument air lines is continuing. Same
as above
for the double CDS racks.
Y-arm mid station:
Same as above for the doubled CDS racks.
Y-arm end station:
The bake out of VE is in the "ramp down" phase.
The
process will be done by 3-26-98 with RGA analysis
to
follow.
Misc.:
Trenches are being dug to lay the fiber optic backbone
down between buildings.
1.1.2 Beam Tube (L. Jones)
a. Tube section fabrication status, Magnolia
Beach shop
(running totals):
Leak Leak
Formed Tested Failures Cleaned Shipped
as of 3/17: 327
301 0 301 238
as of 3/24: 340
316 0 315 254
b. Tube section installation
status (Livingston site):
(running totals):
Inside Leak Leak Final
Welded
Repairs Tested Failures Aligned
as of 3/17*:
234 17 233
0 0
as of 3/24*:
251 19 249
0 0
* Includes gate valves as
the finish "tube sections"
The first additional inside repair was required by
the weld
head stopping momentarily at a loose screw in the
orbital
track. The second was required after the weld forman
took
over the operation on the next seam in an attempt
to better
understand the operation.
The gate annulus seal at the X1 corner station termination
was fixed by applying closing pressure to the pneumatic
operator. This 30 psi pressure was less than the
50-60 psi
used during the prior closing, which apparently
had not
caused the valve linkage to "go over center." The
"over
center" movement this time was accompanied by a
report that
was much louder than normal.
BDF air flow performance
since 3/17:
Particulates (0.5u)/cu ft:
42 (max., any day)
Dew Point, degrees F: 0-7
Temperature, degrees F:
57-60
Of the 249 tube sections
installed, 199 have now been covered
with enclosures.
c. CBI has submitted more
detail for their basis of a "beyond
scope" claim on the leak
location for the Y arm at Hanford.
They state that their proposal
and the contract agreement were
based on the QT experience,
which completed pre-bake testing
within 10 days of starting
pumpdown. They cite the complexity
that was introduced on the
Hanford X arm by Viton outgassing,
and state that they absorbed
the extra cost that caused.
d. Planned meetings:
4/16/98: monthly project status review, Livingston site
5/TBD/98: monthly project status review, Livingston site
7/1/98: Completion Review, Livingston site (performed
early due to manpower availability)
1.1.3 and 1.1.4 Civil Construction (Fred Asiri): no report, due
to recent return from vacation
Hanford Construction (O. Matherny)
Levernier
Consolidated Punch List
Total punch list items remaining- 58
Total Corrected-
38
Total Signed off-
38
Concerns
HVAC
Negotiated with Sibie to install the
air actuated
cylinders to hold the vane axial fan
dampers open.
The price was unacceptable. Sibie will
revise
their estimate and resubmit it.
Fan vibration isolation
Correction of minor deficiencies associated
with the
vibration isolators and seismic restraints
will start
30 March, 98. The final acceptance test
of the vane
axial fans is scheduled to start on
14 April, 98.
Livingston Vavuum Equipment (Allen Sibley): no report, due to
illness
Livingston Construction (Gerry Stapfer): no report, due to travel
40m (Jennifer Logan)
--------------------
We continue to focus our efforts on really understanding the power
recycled michelson. In particular we have been trying to make a
measurement of the recycling cavity length. This is proving tricker
than first anticipated. Since the cavity is very low finesse
we are
looking at the effect on the sidebands of changing the modulation
frequency and dithering the recycling mirror. This is complicated
experimentally because the modulation frequency is applied to the
Pockel Cell via a tuned circuit and thus as we sweep modulation
frequency there is a big change in both the applied modulation and
in
the RF phase. We are trying to compensate for both these effects
by
tuning the RF power and the phase shifter settings as we sweep the
modulation frequency. We are still working on fully understanding
all
the effects that we are seeing.
----------------------------------------------
Interferometer Sensing and Control -- M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
MZ completed draft schedule for ISC design
completion, component fabrication and delivery &
circulated for comment. As expected the rate of delivery
of components to the sites will be strongly resource-limited,
but all the top-level integration milestones for the
Hanford 2k interferometer appear
to be adequately supported.
MZ also worked on documentation for IAS final design
review, writeup of photodetector research (with A. Marin
and P. Csatorday), and preparation for the
NSF review next week.
LSC Lock Acquisition Design (Ware)
----------------------------------
Good news and bad news: First, I was able to increase the threshold
velocity of the L_- loop to 1 lambda/s from 0.3 lambda/s, and may be
able to increase it further. Bad news is that I put (what I think)
are the physical limits on the actuators (laser frequency adjustment,
force on TMs), and this keeps the IFO from locking. I think these
limits are 10 MHz (= 132 lambda) and 4.5 mN/TM (F = m w^2 x = 10.8
*
21 * 20 um). I'd love to find out I have more dynamic range,
but it
should be possible to overcome this.
#MZ note: turns out we probably
can have more range, but we
might have to engage the warp
drive.
ASC Initial Alignment (MZ for Ken Mason)
----------------------------------------
Finished final details and bill of materials for optical lever
transmitter and receiver assemblies, plus support weldment fab drawings
for MMT3 optical lever. Continued other drawing cleanup for FDR
package submittal. Myron is chasing quotes for IAS hardware so
we will
be in a position to place orders directly after FDR approval.
KM spent
much of this week on non-ISC tasks (Brookfield Machine, CDI, Hytec).
LSC Photodiodes (A. Marin/P. Csatorday)
---------------------------------------
Met with MZ on writeup of results to date.
ISC Design/Testing (Fritschel/Mavalvala)
----------------------------------------
LSC Detection Mode Controls:
The closed loop response of the mode cleaner frequency output to mode
cleaner length changes and to additive offset of the mode cleaner error
signal were added to the Simulink common-mode servo model to properly
account for the dynamics of these frequency correction inputs. These
transfer functions are 35th order polynomials with coefficients that
vary by tens of orders of magnitude. This poses severe numerical
difficulties for linearization in Simulink and Matlab. We are still
investigating how to simplify the representation so that the models
are numerically tractable in Matlab/Simulink.
ASC Prototype Bench Test:
Lori will complete actuator calibration after spring break.
PNI/LSC digital control loop test (Fritschel, Daw)
--------------------------------------------------
o The wavefront sensor at the output port failed to work properly
when one of the quad diode elements developed a large dark current
(a recurrent problem with these particular, now LIGO-banned, diodes).
For now, we've moved one of the common mode wavefront sensors to
the output port and it's working fine.
o Digital loop test:
- Ed has moved on to looking at the performance
of the
Pentek DAC output.
- We discussed with Mark P the plans for incorporating
a reflective memory ring in this test that would allow reading
in test excitation waveforms from a prototype GDS digital waveform
generator and writing out results - this follows the plan for
interfacing the digital subsystems with the global diagnostics
system in LIGO.
-------------------------------------------
Lasers and Optics -- J. Camp
(1.2.1.1.2, 1.2.1.1.3, 1.2.1.1.4,1.2.1.1.5)
--------------------------------------------
10 W Laser Contract -- Jordan Camp
------------------------------------
Nothing to report.
Prestabilized Laser -- Peter King
--------------------------------------------
R. Abbott, J. Heefner and L. Wallace have tracked down the problem
encountered with booting the MV162 VME module off the network.
The
originally assigned name (wheencat) was not recognised by the CDS server
kater, despite the correct entries being made in the appropriate network
permissions files.
- R. Abbott has been working on getting the EPICS interface to the PSL
up
and running. So far the signals that relate to monitoring the
performance
of the laser seem to function okay (to within a calibration factor).
Control signals however have to be debugged and this involves going
through
the EPICS records and VME hardware to make sure that they're both
consistent with each other. Some rewiring of the PSL electronics
rack has
been required.
Input/Output Optics Design -- Dave Reitze, UF
-----------------------------------------
The Ufl. group held their FDR on Mar. 25. A splendid time was had by
all.
#DHS: well done, Ufla!
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
The last glass blank has arrived from Corning! We are still owed
4 data
sets, Corning has been notified.
CSIRO has discovered that the 7980 blank we sent for tooling is too
small
for them to use. A replacement piece is being ordered.
They have also
discovered that our specifications for transmission measurement are
worded
incorrectly, the specifications are being revised.
Phase Shift Technology reports another, more significant schedule slip.
They have offered some options for mitigating the slip. We are
considering
our available options.
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
#JC note# Helena Armandula is now managing the
REO coating contract.
She will start reporting on that and also the
development of optics
cleaning procedures.
Confirmed our visit to REO for April 8th. Irena P. contacted Ramin Lallezari
of REO and faxed the preliminary SOW and schedule.
Procured cleaning supplies for the lab. Tested some cleaning procedures
on 1 in. mirrors. Received the etching tank from WAFAB. I would like
to
incorporate it to the cleaning bench that we are going to get. We are
waiting for quotes on the cleanroom enclosure and bench. D. Cook (Hanford)
sent a water sample to Barnstead for analysis to finalize
the requirements for a water system for that site.
Core Optics Support -- Michael Smith
------------------------------------
COS PDR Action Items:
The following issues are being investigated: 1) beam-dumps to catch
the
light transmitted through 2K IFO fold mirror (FM), 2) edge diffraction
at
the COC baffle holes inside the arm cavity, 3) beam-dumps to catch
the
light spill-over in the annular area between the COC and the COC baffle
hole in the arm cavity. Ara B. is completing a generic beam-dump design
which will be mounted to the vacuum housing in the BSC chambers.
Cryopump baffles:
The cryopump baffles are not needed
because the
beam tube baffles shield the internal surfaces of the cryopump at the
far
end of the beam tube from the COC; whereas the cryopump surfaces close
to
the COC require fairly large angle scattering to be intercepted, and
the
scatered power at large angles is negligible.
COS Viewports
The use of o-ring seals for the COS viewports is vacuum compatible,
but
is undesireable because according to John W. and Mike Z. the permeability
to He will wreak havoc with the He leak checking proceedure. A source
of
metal gasket-sealed high quality optical window proposed by Mike Z.
is
being investigated by Ken M.
PO Telescope Design
Preliminary tolerance calculations by Dennis R. have resulted in a
simplification of the primary mirror mount. All of the adjustments
will
be done by the secondary mirror mount and an aligned output port. A
preliminary optical design for a shortened three-element refractive
ETM
PO telescope which will fit on the SEI platform behind the ETM has
been
completed.
-----------------------------
Isolation Group -- M. Fine
(WBS 1.2.1.1.1, 1.2.1.1.8)
-----------------------------
Seismic Design (Mike Fine)
----------------------------------
1. Actuator Component Testing:
All of the test fixture components and instrumentation PO's have been
placed. Items are beginning to arrive at HYTEC. The testing
will begin in
three weeks after the fixturing is installed and operational.
2. In-Vacuum Aluminum Hardware:
Allied is programming for the HAM fabrication. There are a couple of
minor clarifications of the weld preps that Hytec is still working
through.
The geometry that Allied is fabricating to has been finalized with
the last
release of the drawings.
3. PZT Testing:
Hytec is still awaiting technical reply on the filtering problem from
PZT
supplier. Joe Giame is visiting Hytec this Thur and Fri to work on
the
low pass filter problem with Eric.
4. Spring Manufacturing:
Hytec is in the process of evaluating the first 18 springs. Overall
the weld
quality looked good. There were some burrs that will have to be cleaned
up
that were apparently caused by some gouging of the fixturing used during
the
welding process.
Suspension -- (Janeen Hazel/Mark Barton/Fred Raab/Mike Fine)
------------------------------------------------------------
1. Sensor/Actuator Heads:
Janeen sent out three RFQs for the sensor/actuator head production
fabrication. All bids have benn received and are being reviewed.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Physics Environment Monitor (Alex Marin)
-------------------------------------------
We are continuing to work on the acquisition of various
components for the PEM system and in particular for the components
to be used for the first SEI article tests. The PEM DAQ cart is
defined and the order should go out this week.
Shourov and Sarah are working on the environmental
data
recorded at the two sites.
Optical Contamination (Daqun Li)
---------------------
Cavity one loaded with Kapton cables and D connectors has been
continuously locked a TEM00 mode. The initial ringdown and mode
spacing data are consistent with cavity baselines, indicating no
obvious increase in either scatter or absorption loss by kapton in
the early stage. Continuous data taking over a period of ~two
months
is planned to extrapolate a longer term scatter and absorption loss
pattern for kapton ;
J. Camp and D. Li have replaced the mirrors in cavity two with a new
set of mirrors and unloaded teflon wires out of the cavity spacier.
This is because, with the old set of cavity mirrors, 4 ppm constant
absorption loss was observed after teflon loading in comparison with
1 ppm absorption beseline before teflon loading. The current
strategy
for solving this puzzle is first to make sure the empty cavity still
provides a stable and clean environment, and then to repeat the same
measurements by reloading the same teflon wires back into cavity
spacier. This cavity is currently under vacuum pumping.
Non-Optical Contamination (Matt Smith)
--------------------------------------
We are focussing on the things we can do before we start to shut down
the
system for the laboratory move (a bit less than 3 months away). In
addition, looks like the RGA itself and some expertise will be helping
support the vacuum testing of the vacuum internals up at Hanford.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
Suspension
===========================
- LOS Controller testing is complete. Modifications are being incorporated
into
what should be the final design for LIGO.
- IOO suspension controls rack drawings and wiring diagrams are complete.
Cross
connect wiring for rack 2X4 has been started.
- SOS controller prototype board stuffing is complete. Testing will
begin
next
week.
- Satellite amp board layout is 95% complete.
IOO Controls
==========================
- Preliminary rack layout is complete.
- The order went out today for 10 RF photodiode PCBs. They are due next
week
and we will assemble the first box for testing.
- Work is progressing on the Mode Cleaner Demod circuit design and the
EO
modulator controller.
LSC CDS:
==========
- Work is beginning on the design of a prototype filter for the 9.5KHz
and
14KHz resonant peaks. We need -100dB at and -60dB respectively.
PSL
==-===
- Spent most of the week working on the EPICS controls for the
PSL.
Started the week with essentially no control of any parameter and ended
up
with most of the system checked out with the exception of some specific
drivers that are being examined by C. Patton and D. Barker.
Data Acq.
==========
W. Majid Met with the visiting VIRGO team to discuss fixes and enhancements
in
their Frame library. Updated them on our efforts with the development
of
the Frame Class Library and the Frame API. Discussed with them
their
involvement with this effort on providing the I/O classes for this
library. We will sharpen the definition of these I/O classes
during their
stay this week.
Met with Bernard Whiting of U. of Florida to discuss their data analysis
efforts and updated him at length on our Frame library and API
developments. He has suggested we provide for a few more API functions
that would further facilitate the needs of the users.
Have now completed a first cut of the Frame API document and distributed
it for initial review.
Worked with Serap to iron out some of the confusion over the UTC/GPS
timestamps in frames recorded since may of last year.
Worked on Systran's reflective memory network that is now installed
on VME
and a Sun Ultra. Tried to understand the details of the bench
marking
software provided by Systran. Have now successfuly been able
to interrupt
a process on the Sun by a process running on VME. Worked on a
detailed
design of how to pack the Adc data, transfer it over the RM network
to a
Sun box and insert it into a ring buffer, residing in a shared memory
region. Next step is to implement this design and test it.}
- Assembled VME DSP unit; working with Wallace to try and get network
working to
DSP.
- Data viewer coding continues:
- Multiple signals on single display
- Various update rates (to 16Hz)
- Added capability to deliver frames across the network on request.
1.4.1.2 Project Controls (lindquist)
PROPERTY MANAGEMNENT (CHARGOIS)
From: Ed Chargois <chargois_e@ligo.caltech.edu>
Meeting was held with Larry Jones concerning the transportation of Detector
Equipment between Caltech and the two sites with special emphases placed
on the most efficient and less costly. A survey of several trucking
companies was conducted. Conclusion: all rates are the same.
Issue concerning the remaining furniture is being resolved; American
Mayflower transfer and Storage Inc. is providing LIGO with a claim
form.
A 100 percent inventory is being conducted in an effort to recover
the missing
file cabinets.
Meetings with L. Jones, W. Tyler, and E. Jasnow on separate occasion
to discuss
CB Services, Inc., surplus property list. Will determine the
acquisition
cost,
if any, pending the out-come of a meeting between G. Sanders, L. Jones
and
E. Jasnow.
DOCUMENT CONTROL (turner)
From: Linda Turner <turner@ligo.caltech.edu>
NSF preparation -- NSF preparation -- NSF preparation!
STATISTICS. A total of 58 documents have been electronically
submitted
to the DCC. They were reviewed and placed on-line.
Also, a total of 114
documents were added to the DCC database. The following figures
represent
these new additions by category.
C = 65 D = 9 E = 17 G = 4 L = 12 M = 1 P = 0 T = 6
A total of 57 packages were received and distributed. An additional
37
packages were sent out. The DCC processed 72 incoming faxes and
the
project transmitted 57 faxes.
Photo Activity: two packets processed and distributed
LIGO-G980015-00-O, Hanford Vacuum Equipment
Installation, dated February 5,
18 & 25, 1998
LIGO-G980016-00-O, Livingston Site Aerials,
dated February 28, 1998
Total Number of Construction Photos added to the database as new
documents: 49
Total Number of Viewgraphs created: 480
Nine Custom Viewgraph Presentations assembled for lecture use.
No Construction Videotapes received during the period.
COST SCHEDULE CONTROL SYSTEMS (akutagawa, duncan, rianda, patlan)
From: Cindy Akutagawa <cindy@acrux.ligo.caltech.edu>
I compiled the information for the MIT invoice for January and February
1998. I have sent the January invoice to accounts payable for
payment. I
am holding the February invoice for additional funding approval.
I have
been checking on 5D532 charges for the Hensel Phelps construction PR
and
found a 1.8M charge that was charged twice. The correction should
show up
on the March CIT status report. I am now checking on the Stanco
PR. I am
also troubleshooting on various things for the NSF review.
From: Kristin Duncan <kris@acrux.ligo.caltech.edu>
Continued to revise cost/schedule/estimate to complete data in preparation
of the NSF review. Finalized data and distributed the February
1998 CSSR
and schedules.
Reviewing draft materials to be used in the NSF cost/schedule review
presentation.
Continued to work with task managers on history of budget development
and
contingency reconciliation.
Completed production of large color schedule plots for the Facilities
and
Detector groups. These were distributed to task managers and
posted in the
1st and 3rd floor conference rooms. Completed reconciliation
of Level 1
Milestone chart. Chart now accurately reflects what the schedule
and task
managers have reported as expected completion dates. Finished
archiving
February schedule data. All schedule inputs for the month of
February have
been received and recorded. Reports were finalized and produced.
All
schedule data has been zipped and stored in its relevant archive file.
Began preparing March Update sheets for both schedule and cost.
Detector
and Facilities schedule worksheets have been distributed for Task Managers
to review and status. New Earned Value Worksheets showing the
values of
individual milestones were created and are included in the March update
package and have been added to the COBRA batch reports.
Integration Schedule:
Transferred delivery dates from the source data list to the 4K IFO
section
of the LHO schedule. Moved resource assignments from the sub-projects
to
the master project. Created staffing requirements spreadsheet
for the
entire LHO.
SUBCONTRACTS MANAGEMENT (petrac, jasnow)
From: irena@ligo.caltech.edu (Irena Petrac)
CSIRO: Change Order (CO) NO.5 was released to Purchasing. NSF
informational
copies are being processed.
Brookfield: CO No.2, adjusting FFP to include shipping charges, was
released to Purchasing.
Galli&Morelli: Purchase Order (PO) was released.
Specialty Components: Novation of HYTEC PO for air bearings was initiated.
The Contractor was advised accordingly.
University of Oregon: CO No.2, extending Dr. A. Arodzero's association
with
LIGO, is pending Project approval.
JPL WO No.97464: Supplement No.5, authorizing a no-cost extension of
JPL
optical modeling effort thorugh July 98, was released.
From: Ed Jasnow <jasnow@acrux.ligo.caltech.edu>
The pre-proposal conference for the beam tube bakeout electrical contract
was held at Hanford on Tuesday, March 24. Fourteen people attended,
representing five companies, plus the Benton County PUD. Presentations
were given by Bill Althouse, Mark Lubinski, Ed Jasnow, of LIGO, and
Jeff
Shupe of D. H. Hittle & Associates. The presentations were
followed by a
tour of the applicable portions of the site.
Telecons were held on Friday, March 20, among Sandy Pool of OGC, Ed
Jasnow,
and attorneys from Seattle and Baton Rouge. The subject concerned
tax
issues raised by Acme in Hanford and Woodrow Wilson in Baton Rouge.
It was
agreed that these discussions would continue.
From: Bill Althouse <althouse_w@ligo.caltech.edu>
TECHNICAL CONFIGURATION (Althouse)
At Hanford this week working bakeout issues.
1.4.2.1 Quality Assurance (tyler)
>From: "William H. Tyler" <tyler_w@ligo.caltech.edu>
LIGO QA (R. Vincent) visited the large gate valve vendor (GNB) for a
clean-
liness verification inspection and to review status of valve documentation
processes and GNB/PSI action item close out. Mr. Vincent's trip report
with
the latest GNB valve schedule included, has been submitted for LIGO
and PSI
distrbution.
Mr. Vincent also obtained a copy of the GNB operation and maintenance
manual for immediate use by LIGO personnel. LIGO Safety (M. Zydowicz)
had
copies made and "FED Xed" to Livingston to help resolve some questions/
issues with the correct/safe setup and operation of the gate valves.
LIGO QA and LIGO Safety, with the help of Rita Torres, have continued
with
the formating and editing of site procedures. Also continued
weekly status
meetings with G. Sanders to track progress of site operating procedure
preparation.
LIGO QA completed a short (two week) support effort for one of the JPL
propulsion groups.
Date: Thu, 26 Mar 1998 17:51:02 -0800
From: lazz@ligo.caltech.edu (Albert Lazzarini)
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, BB, CC, JK, DC)
__Integration Planning:
LHO/LLO Integration Schedule
Bill Baldwin and Henry Patlan have completed the first draft of the
integration schedule for all interferometers at both observatories
using current hardware delivery dates. Staffing assignments
are being
regrouped by observatory and campus staffs to avoid assigning academic
staff to more than one observatory at a time during the integration
of
the IFOs.
Baldwin is developing a clean room utilization plan during IFO
integration.
__Analyses: Nothing to report
__Reliability: Nothing to report
__Integrated Layout/Drawings:
PSL/IOO OPTICAL TABLE ENCLOSURE
Unit is currently being fabricated. Drawings are being modified for
visual correctness (three doors at ends was two doors, four doors per
side section was three doors, etc..) prior to archiving as well as
recording hardware and parts lists. Next week will put together a
PSL/IOO OPTICAL TABLE ASSEMBLY for xrefing into the Optomechanical
ILD's. This assembly will incorporate Peter Kings PSL layout, as well
as the UFL IOO layout, when they are available.
MIT LEVER LAYOUT A layout is being done to show the path of the optical
levers entering the
WA-1A adapter (shown on Plan optomechanical ILD, lower far right
of
drawing), passing through the two hole louvre baffle, striking the
ITMx
2K mirror and returning to an exit port on the WA-1A. A similar beam
contacts the ITMx 4K mirror also. This same arrangement is also used
in
the Y-arm as well. This layout will be completed Monday.
1.4.3.3 Modeling & Data Analysis (KB/HY/AL)
Mode decompostion
Biplab has finished the design of the class for the mode decomposition
operation for the optics system with alignment degree of freedom, and
has started writing the code. Those which are now being written is
for
the rotation and shift.
SEI/SUS
Somuya talked about the current status of his modeling work of the
SUS/SEI part of the End to End model. He now concentrate on the
dynamics of the wire (or more generically thn objects connecting two
rigid bodies) including the higher modes. He uses green's function
for
the formulation. System with rigid bodies connected by wires
can be
expressed by a linear expression with the external forace as the input,
if there is no exitation in the wire. He is calculating the expression
for the case with wire exsitation.
Documentation
Matt and Hiro continued to write documentations for the End to End
model.
Environment
We have made a decision to use egcs, variant of gcc and maintained by
cygnus, as the standard development environment, because (1) it is
closer to the ANSI standard, (2) it has g77 (equivalent) under the
same
distribution package, and (3) the interface is essentialy the same
as
gcc and is available as easily as gcc.
Ed Maros is working on installing and testing egcs 1.0.2, which is
based on gcc 2.8.0. The cross platform portability is tested by
installing on Linux (Red Hat version 5.0) running on his home
PC.
After he finishes his test, egcs will be available on our unix system
publicly.
He is also doing some further testing for ANSI complience of egcs
1.0.2.
Started work on Data Entry class to be used by Adlib and Alfi, which
are to be the interface between the program and the user, and, using
the same API, the program uses GUI for the data entry if necessary
libraires are lined, or uses the console text in/out for the minimum
configuration.
Data Analysis and Modeling
Dave Farnham (one of the LIGO SURF students from last summer) has been
updating the LIGO noise models C++ library code and developed a simple
user interface to the drive the noise models. The code has had some
problems on Solaris due to math.h on Suns using an ANSII C++ keyword.
However, Dave has made some tests and is gradually getting each model
to work. Hopefully he will have something useful to others in about
a
week.
The C++ socket library announced last week was found to be incompatible
with Systme V Unix such as Solaris. The code builds on LINUX boxes
but
it core dumps, possible from the use of threads on that not so thread
safe platform. A new solution for sockets with similar features is
being searched out.
KB met with Tom P., Rai W. and Sam F. this week to discuss the role
that the LSC would play in support of LIGO software for data analysis
and for diagnostic related activities. KB and SF will work on a set
of
requirements for any algorithms and possible additional code that comes
out of the LSC. KB will also generate a list of useful deliverables
for instrument charact- erization for the LSC to consider.
KB attended the Interfaces to Scientific Data Archives being held in
Pasadena this week and sponsored by the CACR and NSF. The meeting has
turned up some interesting future directions for interfacing with large
scientific data sets.
Anderson reports:
I have Confirmed 3 new radio pulsars one of which may be a binary. A
priori, probably not a coalescing binary but we won't know until we
observe at Arecibo again this summer.
I helped put in a CACR proposal to NASA to fund "Basic Research in
High-Performance Computing and Communications" which in part will fund
a Postdoc for "Algorithms and Software for Gigapoint FFTs" if it is
funded. This is a renewal and sounds like it is a pretty good bet.
I am 50% through a large HPSS data transfer that is another benchmark
test: I am copying over 329 Exabyte tapes using 2 5GB/500kB/s
drives
over 10BaseT to jelly and then ATM to HPSS. This is the test that
prompted my last "jee I wonder if HPSS is good enough" message.
However, in the last 3 weeks since that message the system has had
essentially 100% uptime. I think there was 1 file that glitched
but I
have written a "smart" script to automatically resend problem files.
In
the last 4 weeks 1/2 TByte has been transferred as 1753 separate 320MB
files. My opinion of HPSS is swinging back. Unfortunately, the
work to
use the SP2 for metadata services has been pushed back to sometime
in
April. The positive side of this is that it will give me a another
few
weeks to see if HPSS can continue to run and accept the remaining
1/2TByte of real data without any major problems.
Lazzarini was in contact with Jim Leighton (DOE/LBNL) on how ESnet will
be routed to Caltech from Hanford. It appears the prerferred
approach
by DOE is to use Caltech/HEP connection in the near-term. DOE is
interested in the details of how CACR is linked to SDSC to investigate
whether this pathway is a viable long-term alternative (Caltech HEP's
bandwidth will eventually be choked if LIGO goes beyond the initial
T1). Tom P. is in a fact-gathering mode for the information requested
by DOE.
The final plans for the rehabilitation of Millikan Lib. 6th floor were
reviewed.
A 50GB RAID system for the 40m DAQS prototype has been ordered, as have
two data distribution servers for that unit. One of the two units is
a
long shot test of DEC ALPHA 600 MHz technology running LINUX. The
future of the Alpha is questionable; yet it delivers 2x - 4x the
performance-to-cost ratio and is less power hungry (a concern when
considering clusters of 50+ machines). The other server is a SUN
UltraSparc 300 MHz Server. We shall see who wins.
COLLABORATIVE RESEARCH (LS Finn, Mohanty, Mukherjee, Romano)
Sam Finn: 1) Prepared and delivered final ``contractual obligation''
LIGO Science Seminar on ``Things that go bump in the night'' 2)
Prepared and delivered invited plenary lecture ``LIGO: The Laser
Interferometer Gravitational-Wave Observatory'' at the Interfaces to
Scientific Data Archives Conference. This meeting was meant to bring
together the computer scientists involved in developing and maintaining
scientific data archives and libraries, the scientists involved in
creating/producing the data that needs to be archived or cataloged
in
an archive/library, and the end-users of the library/archive product
to
discuss the problems associated with constructing, organizing and
making available large scientific data archives. My presentation was
a
brief introduction to what LIGO is all about (appropriate for computer
scientists), the nature of the LIGO data stream, the LIGO data rate
and
data archiving plans and needs, and the data access models (based on
the kinds of users, the kinds of data they are interested in, and the
kinds of computations that we need to perform on the data). 3)
Revised
benchmark model being used by the LSC seismic isolation and suspension
group to improve user interface and more faithfully represent the
detector noise from a set of detector parameters. 4) Worked on
organization and agenda for April GWIC Meeting.
Soumya Mohanty: Had a meeting with Hiro, Matt and Biplab in which
I
explained my plan for making a modular module of the SEI/SUS. I am
now
trying to apply this plan to simple systems. If the scheme, which is
based on a self-consistent calculation of action-reaction forces, works
for the simple cases, it may be explored further.
Soma Mukherjee: Started a preliminary analysis of September '97
40-meter data in MATLAB environment in terms of power spectrum, narrow
banding, filter design etc. Revised the manuscript "Three types of
gamma ray bursts" to incorporate referee's suggestions. Attended 40
meter lab.
(J.D. Romano)
1. Currently 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.
2. Was able to prove that the filter function (for the
cross-correlation statistic) that maximizes the expected
signal-to-noise ratio is optimal in the sense that its associated
decision rule has minimum false dismissal rate for a fixed false alarm
rate.
1.4.4.2 General Computing (LW/TE)
MIT:
1. We have installed an additional modem.
2. We have received temporary demo licenses for all the Matlab
toolboxes we don't have permanent licenses for.
3. We have begun to inventory and order cables and assorted small parts
for our move later this summer.
4. Started teaching some computer mini courses for the new users.
Livingston:
1. PCs have been ordered and now waiting for delivery.
2. Preparing for the ATM installation. Installation planned to take
place
during the week of April 12. Dave B., Christine P., and Larry W. will
be working on the installation in conjunction with the preliminary
ATM
installation for the data acquisition equipment.
Hanford:
1. The PCs have finally arrived and are being setup.
2. PRs are in place to get the T1 installed. The jumpers on the
fiber-line have been installed and when U.S. West receives the PO they
will acquire and install the network hardware. (AL
NOTE: See related discussion under Data
report, earlier)
CIT:
1. We are still doing cleanup on the transition from the old ligo
server to the new server. This includes fixing up e-mail accounts and
data restoration. Currently, we are unable to get the old ligo
server
to boot up so data is being restored from backup tapes.(AL
NOTE: just in time switchover)
2. Putting through more orders for equipment to be installed at both
the Hanford and Livingston Observatories. Acquiring new pricing
information has been taking more time than usual on the latest orders.
3. Just as a note: ITS (CCO) is no longer in the software ordering
business. That has been taken over by the bookstore which will
(and
has) cause some problems in ordering until the bookstore gets up to
speed on the process. ITS is still handling hardware orders at this
time.
4. Multiple accounts have been added along with modifications to
existing accounts.
5. Multiple s/w installs on PC's. Mainly, network and e-mail packages.
6. More network connections/modifications and h/w setups for the lab
areas. We still have some recabling to do in the 40M to get the north
annex connected to the ATM side of the house.
7. Worked out more of the details for the T1 installation at the
Hanford Observatory with U.S. West. They have agreed to purchase and
install the equipment and turn control of the router and s/w over to
LIGO. They will do some h/w maintenance to items under warranty but
LIGO will have full responsibility over the s/w.
Arranged and processed the paper work for 13 trips. Continued
to
work on the preliminary arrangements for the upcoming GWIC/PAC4
meetings to be held in Livingston, LA, in April. Worked on the
ever
present backlog of Expense Reports.
Performed miscellaneous duties as requested by various members of
the LIGO Project here at Caltech as well as members of the staff of
each of the two (2) sites.
Prepared and distributed the Weekly Travel/Vacation Itinerary Report
for LIGO Staff and Visitors.
Processed Hourly Payroll, incorporating various recent changes, and
the processing of Vacation/Sick Leave accounting.
Rita Torres:
Date: Thu, 26 Mar 1998 09:03:16 -0800
From: Rita Torres <torres@ligo.caltech.edu>
ACTIVITY
As a guide, prepared a list of names comprising the Science Group;
to date there are 42. Distributed material to the group.
For I. Petrac did change order No. 5 to CSIRO, change order No. 2
to Brookfield Machine, change order No. 2 to University of Oregon,
JPL work order - Supplement #5, and change order No. 19 to NYMA
(formerly Telos).
For E. Jasnow did change order No. 11 to CBI, and change order
No. 1 to Support Services PC262682.
With B. Tyler did revisions/edits to Beam Tube Safety Procedures.
M980001-00-M, M980005-00-M, M980054-00-M and M980058-00-M
are in on-going review by LIGO CIT and LHO management.
Distributed: PO PC264295 with Galli & Morelli for Advanced
Detector
Suspension Components, change order No. 14 to PSI.
INFORMATION *** For those who missed last week ***
The ever-popular Change Control Board form (done in FrameMaker)
can be found at \torres\crform01.
Date of current form is 7/97.
UNIX users - I'm told you can click on New then LIGO; or find it at
apps/frame/fminit/usenglish/templates/LIGO.
Dorothy Lloyd:
Date: Thu, 26 Mar 1998 10:42:48 -0800
From: Dorothy Lloyd <dot@ligo.caltech.edu>
Entered AP30 reports into database and contract invoice summary sheets.
Processed numerous PRs (now coming in heavy from Hanford and MIT),
POs,
Change Orders, Check Request, etc. Processed as many invoices for payment
and followed up on problems with invoice payments. Reconcilled February
CA47 Work Order reports. Completed reconcilling January status report.
Provided clerical support were needed.
For additional information about this report, contact sanders@ligo.caltech.edu