The Project Control Meeting
for Monday June 29, 1998 will be
a Cost and Schedule Review
(Meeting time: 10:00 am Pacific Time)
Special Items: Report on Operations/Safety Review, Bakeout Readiness Review, Decisions on Gate Valves/O-Rings
Date: Thu, 25 Jun 1998 08:43:22 -0700
From: Gerry Stapfer <gerry@ligo.caltech.edu>
WBS 1.1.1 Vacuum Equipment(Worden)
1. Gate Valves:
GNB has been working at both Hanford and at the
GNB shop.
The remaining LA valves should be completed the
second
week of July. Eight Hanford valves are in process.
a. WGV11 (Y-end) Cylce testing revealed noise from
the upper
bearing housing (external to the vacuum). This valve
has
undergone all of the GNB rework and should be ok
once this
noise is fixed.
b. WGV12 (Y-mid BT) The replacement gate was installed
along
with new O-rings. Sealing surfaces were cleaned.
This valve
has an undersize ball screw and the decision has
been made
to replace it. Parts are on hand today.(6/24/98)
c. WGV14 (X-mid) Bellows has been replaced and tested.
d. WGV17 (Y-end BT) GNB has made internal adjustments
and this
valve is complete except for the in-situ leak test.
Very quiet.
*******
GHS note: A meeting was held at Hanford on Wednesday
to discuss the strategy for replacing or treating gate valve O-rings. This
arises from the concern of O-rings sticking, depositing material and even
pulling out of grooves on the large gate valves after baking in the closed
position. There is evidence that carnauba wax in the O-rings are the cause
of this ominous behavior. The worst case effect would be to render a beam
tube gate valve inoperable after the beam tube bake. Optics contamination
might also result.
The meeting was attended by Sanders, Worden, Raab, Coles, Sibley, Weiss, Jones, Tyler, Coyne, Lazzarini, Stapfer, Matherny, Riesen and Zydowicz (I hope I have this list correct). After reviewing the state of Rai Weiss's tests and the latest experience with the rework of GNB valves it was decided:
1. The Y-2 beam tube bake at Hanford will proceed with the existing valves and O-rings but the gate valves will be protected by blank offs and removal of spool pieces. The experience of this bake will be considered in deciding to move on to subsequent bakes. This moves ahead on our schedule with some risk of a Y-2 rebake, and accomplishes a climb up the learning curve at the earliest possible time.
2. Rai will define and carry out a rapid program of exploration of new O-ring materials and/or processes for possible use later. New processes and materials must be qualified prior to use.
3. Materials will be ordered, and processing begun, for wax free O-rings.
4. All other gate valve inspection and rework
will proceed without delay assuming there will be no change of O-ring materials
or processes. This risks a later reentry into the valves but delay now
risks equivalent contractor charges and delay of other needed rework.
********
2. PSI presented their test data for the WA left
arm
in Westborough last week. The results were acceptable
with a few additional measurements suggested for
the remaining
vacuum volumes. PSI will perform accumulation measurements
to improve the RGA air signature leak test.
3. Installation activities:(Kyle Ryan)
X-arm end station:
PSI pumped down the VE up to the BT
44" gate valve, performed a leak test
and found a leak in/or around the 80K
pump.
X-arm mid station:
No change.
Corner Station:
The bake (heating portion) of the right
BT manifold is complete.
Y-arm mid station:
No change.
Y-arm end station:
GNB performed some "light filing" within the
BT 44" gate valve in the area of the recesses
which "park" the gate carriage rollers while
in the closed position. They also replaced
the ball screw in this valve and now it oper-
ates quietly while moving up and down and when
camming off of the seat.
The VE 44" gate valve had some adjustments made
but will need some more attention as it (as of
6-24-98) is still too noisy when in operation.
Bob Vincent was on site last week and oversaw
PSI and GNB repair activities.
1.1.2 Beam Tube (L. Jones)
a. Tube section installation status
(Livingston site):
(running totals):
Inside Leak Leak
Final
Welded
Repairs Tested Failures Aligned
as of 6/16*: 404 23
404 0 0
as of 6/23*: 404 23
404 0 25
* Includes gate valves as the
finish "tube sections"'
Installation will be complete
when weld, leak test,
and alignment all reach 404.
CBI has taken direct GPS (through
the enclosure) measurements
on 5 of the X arm control supports, which have confirmed
their
positions to within 5 mm and thus do not indicate
that a
readjustment is needed. A minor change has been
made in the
new procedure to improve fixture installation; otherwise,
the
new procedure is working well. Richard Roche is
being trained
for assisting in Steve Hand's absence.
A site power failure shut down
the turbo pump carts on
Saturday, and one of these would not fully restart
on Monday.
When the backing pump cart was moved to make sure
that its
vibration would not interrupt restart, the turbo
restarted
with no problem (we're not sure that this was the
cause,
however). A small roughing pump was purchased to
aid CBI's
accumulation test (see below).
CBI measured the X arm mid station
valve's bellows leak rate
at 1.2E-8 tl/s of helium. The helium mass spectrometer
was
used as a backing pump for all of the output of
the turbo
pump that is located on the bellows side of the
mid station
valve, and the turbo cart on the opposite side was
valved off
at the time. However, the magnitude of the measurement
is
only a lower bound, as the helium leak used for
calibrating
could only be injected at the mass spectrometer
and the pumps
at each end of the arm were taking some of the flow.
CBI plans to perform the first accumulation acceptance
test
of the X1 and X2 modules within a week, simultaneously,
with
an RGA monitoring each module. The mid station bellows
leak
mentioned above will be excluded from the test by
pumping
a vacuum on the inside of the bellows through a
special PVC
adapter puttied to the top of the valve stem, and
the valve
leak in the Conflat in the annulus pumping circuit
is
excluded by being sealed with putty. This first
accumulation
will be followed by two global calibration accumulations,
injecting the calibrated air leak first in X1 and
then in
X2, monitoring the two RGAs for each test.
b. Planned meetings:
7/1/98: Completion Review, Livingston site (performed
early due to manpower availability)
> 1.1.3 & 1.1.4 BTE and Civil Construction (Fred Asiri)
>
> >>Issues:
> Hanford:
> 1. Water System Integration: A modification to the bid
package to
include water supply for the Staging/Storage
building was
issued last Firday. Bids are due
on July 7, 1998.
> Livingston:
> 1. HVAC Chilled Water Coils/Fins Condensation: Bernhard
Mechanical
continuing rework (reorienting)
the air cooling coils per
manufacturer's
installation instruction.
2. Electric Power Quality: A meeting was held to
discuss the recurrent
problem maintaining the HVAC system
running at the Livingston site
on June 19, 1998. In attendance
were representives from DEMCO
(provider of electric power),
Parsons I & T (AE & CM), G. Stapfer
and I .
As result of discussion, it became
clear that:
A> The motor for chilled water
pump, requires that the maximum
voltage imbalance
between the phases of a three-phase power
supply to be
2% at the start-up.
B> The quality of the electric
power supplied by DEMCO to the
Livingston site
at present does not meet this requirement.
In order to remedy the aboves
it was agreed ; A, to improve the
quality of incoming power; B, to relax the tight requirement on
the
motors, subject to the result of a cost-risk analysis by Parsons.
DEMCO committed to provide
us (AT No Cost to LIGO) with a
substation. Initially, a
temporary one to be completed between
4 to 6 weeks. This is to
be followed in three to six months by
a permanent substation.
The new substation will receive power
from the 69 KV line in lieu
of the present 13.2 KV supply line.
This line (69KV) will provide
more stable voltages "good to within
2%" by placing the site
one transformation step closer to the
power plant. It will also
remove most vicinity power user from the
part of the power grid used
by LIGO.
I will be travelling to
Livingston site from June 29 thru July 2,
to have a meeting with Hensel
Phelps (general contractor), Mel
Weingart of Parsons, Bill
Holliday (CM), Ed Jasnow and G. Stapfer
to discuss and resolve the
outstanding back charges.
I will be at March Metalfab
to review the status of the fabrication
of the non- Vacuum parts
on June 26, 1998.
Hanford Status (Otto Matherny)
Levernier
The Levernier Infrastructure contract
is nearing completion. There
are 17 items that remain to be satisfied,
all of which are relatively
minor. For this work we are still holding
over $700,000.00 in
retainage.
No change since last week.
OTHER ITEMS
1) Sent out the construction package for the
new building to the
prospective bidders.
2) Issued an addendum to the Water System Modification
contract package.
3) Issued the maintenance contract packages
to the prospective
bidders.
Livingston Status (Gerry Stapfer)
There is still no rain in sight, and things are getting pretty brown.
The key issue remains to be the quality of the incomming power. DEMCO
is
installing a temporary substation which should be complete within 4-6
weeks. This should provide significant improvment. Evaluation of additional
means to improve the situation is in progress at Parsons.
Date: Thu, 25 Jun 1998 18:44:10 -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)
--------------------
The power output from the argon ion laser is now rapidly degrading.
Spectra Physics expects to ship a new tube at the end of this week
with installation scheduled for beginning of next week. The present
power output is beginning to hamper work and thus we decided to pause
our experimental investigations to allow the upgrade of computers
at the 40m. This has included the new 40m DAQ system (see Rolf's report
for last week for an outline of the new features) and the replacement
of our overloaded Sparc 5 machine, from which we control the laser,
suspensions etc, with an Ultra II machine. Rolf has added a 3rd
screen
to this terminal so that we can view the DAQ display in the lab.
This
represents a big improvement; previously we could only view the data
display in the control room which frequently proved too akward to make
it worth using. We are now looking forward to being able to really
put the DAQ system through its paces!
----------------------------------------------
Interferometer Sensing and Control -- M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
We have tentatively scheduled the ASC FDR for 7/23 and the LSC FDR
for
7/29. Relevant design documents will be circulated about a week
before
each review.
MZ worked on progress tracking update to ISC MSProject plan, milestone
checklist, and EAC (all to month-end June) for submission to Project
Controls. Also worked on planning and material preparation for
ASC FDR
and LSC FDR.
ASC Initial Alignment / ISC Optical Tables (K.Mason)
-----------------------------------------------------------------
Working on the design of the ISC Optical Tables. The drawings
to
interface the enclosure to the chambers have been completed.
Parts are
beginning to arrive for ASC alignment. The Newport optical table for
IOT7 has arrived.
#MZ notes: the IOT7 table will be stored until 7/14,
when we
will set it up in the new MIT lab for integration.
LIGO has
now received most of the coated optical viewports
for
Washington; two samples were tested optically, and
the lot was
then released into the cleaning/bakeout queue at
Caltech. Also
ordered miscellaneous hardware to support viewport,
optical lever and ISC table integration.
ISC Optomechanical Design & Fabrication (Matt Smith)
-----------------------------------------------------------------
Designed the Photo Diode assembly and riser block. Jay Heefner
has
reviewed the layout and needs to change the 9 pin connector to a 15
pin
connector. Will modify the layout for the Photo diode assembly.
Started to get familiar with the ISC layout drawings to start the design
for the mounting of the Optical Levers to the BSC support piers.
LSC Acquisition (B. Ware)
-----------------------------------------------------------------
Brent is on travel this week.
ISC design and testing (P. Fritschel; N. Mavalvala on travel this week)
-----------------------------------------------------------------
o Haisheng implemented amplitude stabilization of the Marconi Rf
signal generator to be used as the modulation source. This was done
by
using a Schottky diode detector to measure the RF amplitude, and
feeding back to the external AM input on the Marconi to stabilize
it. The Rf was also split off to another, out-of-loop diode detector
used to measure the residual AM noise. The test showed a residual
noise of somewhat below the requirement of fractional fluctuations
of 5e-8/rtHz; thus this method will work to stabilize the oscillator
to the required level.
#MZ note: This is a significant
achievement; AM
better than
-146 dBc/Hz (!) at 100 Hz from the carrier,
with acceptable
phase noise. And not too
expensive
either.
o Implemented and tested a digital elliptic stopband filter on the PNI
digital crate. This type of filter may be used to provide the
required loop attenuation at the test mass resonance frequency to
ensure loop stability. The filter works well and appears to be a
reasonable way to provide this function.
#MZ note: peter's onto a pretty
cool idea here,
especially
if you noticed the subtle point that
the TM resonances
lie _above_ our Nyquist frequency.
o Completed documenting the servo design for the LSC final design.
PNI mixed-signal loop test (Fritschel/Daw)
---------------------------------------------------------------
o We implemented a digital filter in the servo that acts as a resonant
gain stage, increasing the gain at the suspension vertical ('bounce')
mode (@19 Hz) by a factor of 10 over a narrow bandwidth (.5 Hz). This
filter is switched in after the instrument is locked, and in order
to
do this without breaking lock, we found that we had to switch it in
slowly; to do this Ed made an algorithm that adds in the filter over
a
1 second interval. Measurements showed that we did get a suppression
of ~20 dB of the vertical mode with the filter in the loop. This is
satisfying to see, because we've recently concluded that such a gain
section will be part of the LIGO length control design.
o Digital test point system: The signal injection and readout system
using the reflective memory network & Mark's arbitrary waveform
generator was made operational this week. The system was used to
inject single frequency sine waves into the loop, and to measure
the closed loop transfer function of the Michelson servo. The
system worked (in the end) very well, and we see it as a major
success in implementing the diagnostic testing & interfacing of
the ISC.
o We also took phase noise data with the Michelson under digital
control via two methods: looking at an analog monitor point located
after the mixer in the whitening module with a dynamic signal
analyzer; and writing digital data to the reflective memory, where
they
are read and then stored by the GDS (Mark's) processor. These data
are compared to the phase sensitivity seen with the analog loop.
The phase sensitivity under digital control is seen to be a
little worse than under analog control -- up to a factor of 3
worse at low frequencies (f<500 Hz), and ~50% worse in the
high frequency region (f>1kHz). We're trying to track down the
source of this difference.
o Thermal lensing: Ryan completed a 3-d model of the thermal
lensing in the beamsplitter, and the results help explain the
asymmetric beam patterns seen in the PNI. Basically, the model
predicts different thermal lens focal lengths in the horizontal
& vertical planes, arising because the beam propagates through
the lens at an angle in the beamsplitter substrate. We took more
data (images) of the dark port beam at various power levels in
the interferometer, and we see the qualitative behavior predicted
by the model.
#MZ note (last one this week):
It falls to me to report,
sadly, that the PNI will be
decommissioned and permanently
disassembled on Monday June 29
in preparation for the
MIT lab relocation. We hope its
transplanted components
will help bring the Thermal Noise
Interferometer crew, and
other recipients, as much insight and
success as we've had in
these 4 years of operation here at
MIT. Partha, Gaby,
Brian, Haisheng, Ed, and especially Peter
Fritschel should be congratulated
for conceiving and creating
this superb machine, and
for the outstanding advances it made
for 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)
--------------------------------------------
Prestabilized Laser -- Peter King
--------------------------------------------
- The optical layout of the frequency shifter has been modified to use
a
shorter radius of curvature concave mirror in order to make the PSL
optical
layout more compact. The diffraction efficiency of the frequency
shifter was
reduced as a consequence, due to insufficient overlap of the acoustic
field
with the incident light. Some problems were encountered with
the
voltage-controlled oscillator (VCO)/rf amplifier combination not putting
out
sufficient rf power to drive the IntraAction acousto-optic modulator
(AOM-802R).
- R. Abbott has been working on the new VCO/rf amplifier combination.
The
new rf amplifier is capable of delivering 0-15 W for a 0-5 V input.
The
build of the 21.5 MHz electronics is currently underway.
Input/Output Optics -- Dave Reitze, UF
-----------------------------------------
Mode-matching Measurement
Qi-Ze and Rana have re-aligned the cavity to knock down the 01,10 modes,
but are still having some electronics problems.
High Power Testing
Sany's measurements of thermal lensing of the Faraday rotator in vacuum
revealed no difference from earlier in-air measurements. (Not
so
surprising since the FR still has good thermal contact to the metal
platform surface that supports it.)
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
The final data deliverables arrived this week from Corning, we can now
complete processing of the final invoice. There are still unresolved
issues about bubbles in some of the glass, we will be able to close
these
issues when we have received the final polished pieces from CSIRO in
February of next year.
The ceiling has been installed in the IR metrology lab, power is present
and ready to be connected when the air conditioning system arrives.
The
only things we are waiting on are water, a condensate drain and an
estimate
on compressed air.
The acceptance testing for the Veeco IR interferometer has been
scheduled
for July 6-8. Veeco has suffered a delay of about one week due
to some
mechanical interference problems. The schedule slip has
allowed
installation in parallel of longer throw PZTs for the phase shifter,
which
will allow analysis to higher order, decreasing the effects of non
sinusoidal fringe patterns due to measurement of coated optics.
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
REO Contract - COC coatings. Received 2 coated RM's. We were advised
by REO
that SPETM02 and 03 showed a high number of coating defects in the
HR
surface. We should inspect these two parts closely, as they may
only be
suitable as spares.
They serviced the ion source, cleaned the chamber, and then ran a full
test
shot before proceeding with the HR for SPETM04 and 06, which were coated
without further problems.
Cleaning procedures: We successfully cleaned a 3" coated optic with
magnet/standoff assemblies. This part was baked according to LIGO specs.
after the magnets were epoxied. Water did not wet the surface after
baking,
indicating some type of contamination. The surface was cleaned following
our
procedure without much effort. The optic was tested for cleanliness
by the
vapor wetting test, where the cleaned part is placed at an angle, directly
over steaming water. On a clean part, interference fringes are observed
running uniformly throughout the part. This test is able to detect
low
surface energy contaminants such as hydrocarbons.
Core Optics Support -- Michael Smith
------------------------------------
PO TELESCOPE MOCK-UP/PROTOTYPE:
Three wooden housing mock-ups were fabricated, and are being re-worked
by
the CIT wood shop. One set of PO telescope prototype front supports
has
been completed by the CIT shop, and one set of prototype gimbal mounts
is
in process in the shop. K. Mailand has finished the detail drawings
of the
PO telescope secondary mirror mount; the drawings will be sent to an
outside shop for prototype fabrication next week.
BEAM-DUMPS:
A. Badalian has almost finished parts drawings for a prototype double
beam-dump. The drawings will be given to the CIT shop next week for
fabrication.
3D MODELING:
Angel is completing a 3D layout of the interior of the HAM chamber,
and
will make a composite 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.
ETM PO BEAM:
D. Rose has generated an energy distribution map of the output of the
pupil
relay for the ETM PO beam. The image quality and displacement
linearity will be evaluated by M. Smith.
FARADAY ISOLATOR:
M. Smith is working with a sole-source vendor of the Faraday isolator
to
finalize the specification prior to generating a bid package.
TEST EQUIPMENT: 1)IR AUTOCOLLIMATOR
J. Kern is investigating modifying a standard tooling autocollimator
to
incorporate a 980nm IR laser diode illumination source and a photometric
CCD camera output. Standard photometric CCD software packages will
enable
near-real time measurement of the spot centroid. The autocollimator
will be
used as the primary alignment beam for on-site integration of the COS
equipment, and potentially as a portable alignment tool for the PO
telescopes.
STEERING MIRROR MOUNT TEST:
J. Kern and M. Smith are 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:
A prototype multiplexing system for the coarse actuation system is
built, and Hytec is anticipating testing it as soon as the appropriate
power supplies can be found. The system will demonstrate the
feasibility of using multiplexing, where we use one set of actuator
drive
electronics to move up to four actuators. The cost savings of using
such a system are large. Testing of the W actuator stage is going on.
Preliminary data for the SST stage is being reviewed, and it is indicating
the stage is softer in the transverse direction than the FEM had indicated.
Hytec is in the process of setting up the aluminum stage to get some
data
on it.
2. Pneumatic Components:
The pneumatic components for the CAS system have arrived at Hytec and
are being integrated into the electronics/pneumatic cabinet and onto
the
BSC components. Hytec has completed the assembly of the air power
system used to supply the air bearings.
3. FDR-HAM Structural Components:
The FDR was held last Friday. Awaiting the feedback from the committee,
there were a number of smaller procedural issues addressed to facilitate
a more orderly and efficient flow of drawings and change requests for
the production phase of this work.
Suspension -- (Janeen Hazel/Mark Barton/Mike Fine)
-------------------------------------------------------------------
1. LOS Fabrication:
The first article structure was inspected at JPL Tuesday. The two
jig plates for setting up the compound angle machining will be
inspected tomorrow. Irena has processed the production contract for
the
height adapters. American Thin Films has sent the 245 molybdenum coated
heads on Monday and the shipment should be arriving at CIT anytime
now.
2. Alignment Fixture:
Almost all action items have been addressed from the kick-off meeting.
There are still a few open items, foremost being a replacement bearing
with
vacuum compatible materials. Janeen has changed the design for the
support beam to be adjustable in length and sent a preliminary copy
of
the changes to CDI and SJI.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Global Diagnostics System
(Rolf Bork, Paul Govereau, Mark Pratt, David Shoemaker, Daniel Sigg)
--------------------------------------------------------------------
GDS effort this week was focussed on demonstrating a remote
excitation test of the PNI. Both injection and readback reflective
memory channels (digital testpoints) were used to performed transfer
function measumements in real-time, to inject a calibration signal
and
to capture time series data for spectral analysis.
In other news, MP
is taking a two month leave of absence beginning next month.
Physics Environment Monitor (Alex Marin)
-------------------------------------------
At the present time, both DAQ/PC systems has been
assembled and
tested at the Hanford site (including LabView and some acquisition
data
programs), and they are ready for the implementation of the software
needed
for the 1st SEI/HAM tests.
We are finalizing the process of accelerators/signal
conditioners and mounting scheme choice, taking into account the sensitivity
and noise levels, as well as the elimination of potential ground loops
problems.
Ray Frey and AM discussed the design of the Magnetic
Excitation System.
Univ. Of Oregon will finalize the design based on two coils and an
audio
amplifier, capable to produce near the test masses magnetic fields
of
the order of 10^-5 to 10^-14 Tesla (uniform or gradient field, at various
frequencies TBD). Also we will work toghether versus the finalization
of the
cosmic ray monitor design and fabrication.
Preparations are started for installing the outdoor temperature sensors
on each side of the five buildings at the Hanford site(20 places).
The
sensors arrived and the cabling has been specified and is on order.
Visited the vendor MTI who are making the electromagnetic and PZT shaker
plates. The plates look good and will be ready for shipment around
June
30. They will be shipped to the Hanford site for a fit check
and will
be available for the SEI first article test.
Particle counters and a Power Line Flux probe, were ordered for
the
Livingston site.
The microphones, with accessories and the remaining particle counters
were ordered for the Hanford site.
Optical Contamination (Daqun Li)
--------------------------------
D. Li is on vacation this week. Optical contamination testing of
viton will begin next week when he returns.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
Data Acquisition
=================
- ICS110-B1 ADC module at Hanford now working, thanx to the efforts
of D.
Barker. Initial tests indicate module has better performance than the
previous
110A model that we have been using. Therefore, we will now place the
order
for
production quantities.
- Tests of the prototype RAID system by S. Anderson indicated less than
required
performance and a few other problems. After a meeting with A. Lazzerini
and
K.
Blackburn, it was decided not to use this system at Hanford. As an
alternative,
a Sun 450 server, loaded with 4 CPU, 1GByte RAM, and 180GByte internal
disk
will
be used to perform the storage function. (Note: additional external
SCSI
drives
would be used to increase storage capacity) This unit will connect
to the CDS
framebuilder(s) and LDAS server(s) via a private OC-12 ATM link.
40m Lab
========
- Installed new DAQS system, with connection to RAID.
- Replaced 40m operator console with an Ultra2 machine (previously
a Sparc5);
also added a third monitor to this system to allow viewing of data
from DAQS.
- Next week, will connect DAQS to ATM network for data feed to CACR.
Suspension Controllers
=======================
- Completing tests of first LOS controller (final output tests will
have to
wait
until we receive the PA85 parts).
- Receipt of SOS controllers from board manufacturer has been delayed
until
June
30 (initially due June 19).
Input Optics
=============
- Printed circuit board for EO shutter controller is on order; finishing
layout
for the 19" chassis enclosure.
1. Had extensive communication with members of International Advisory
Committee and Program/Advisory Committee for 1999 Amaldi Conference.
2. Prepared initial versions of MOU and Attachment re University of Pisa.
3. Facilitated Photo Acquisition by Saulson from Raab.
4. Prepared Attachments for TAMA and GEO.
5. Reserved Lecture Hall for Amaldi Conference for the new dates,
July 12-16, 1999.
6. Discussed Hotel Accommodations for the dates above.
| 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-970020
(Revision A) |
WBS 1.1.3 | Beam Tube Enclosure, State Sales Tax Negotiations | F. Asiri |
| CR-980023 | WBS 1.1.4 | Hanford Electrical Power | F. Asiri |
A total of 16documents were electronically submitted to the DCC.
These were reviewed and placed on-line. Also, a total of 89
documents were added to the database. The following figures represent
these new additions by category:
| C | Contractual/Procurement | 73 |
| D | Drawings and CAD | 4 |
| E | Engineering Documentation | 1 |
| G | Graphics/Presentations | 1 |
| L | Letters | 9 |
| M | Management/Policy | 9 |
| P | Publications/Formal Notes | 0 |
| T | Technical Notes, Informal | 1 |
ACTIVITIES
[Note: a meeting was held on Thursday, June 18, to review journal entries proposed to correct the actual costs and open commitments being reported for the Stranco Subcontract. Attendance included personnel from Accounts Payable, General Accounting, Purchasing, Federal Accounting, KPMG, and LIGO (am I missing anyone?) The set of journal entries proposed for correcting open commitments (to zero) were approved, but the journal enties proposed for correcting actual costs (mostly in the holding account for retainage) were held pending my review this week. We have now reviewed and approved these entries as well. The journal entries are being entered, and the effects should show up on the Financial Reports for the end of June!!! Hooray! During the meeting today (Thursday, June 25) KPMG indicated that they have completed a set of correcting journal entries for CB&I, Corning, Hensel Phelps, Hytec, Lightwave, Levernier, PSI, and RSI. I will review these journal entries with them prior to submittal to accounting. Two contracts have been reviewed and appear to require no adjustments: Hughes Danbury, and the University of Florida. Review is in process for Allied Engineering, CSIRO, Heraeus Amersil, and Parsons. PhaseShift and some of the Engineering Labor Contracts have been added to KPMG's list of subcontracts to be reviewed. Please, if you have any subcontracts that have not been mentioned, but which you feel need to be checked, let me know. -pel]
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integrations (PK/BB/CC)
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. Should be able to find some
time to make a sketch suitable for a wood mock up by Tuesday, 6/30/98.
ASC LEVER LAYOUT
The lever beam path layouts in spools numbers BE-5 & BE-6, and BSCs
#3 & #7 had been started now that Louvre Baffle design is determined.
Should be able to finish this layout possibly by end of next week.
WASHINGTON OPTOMECHANICAL ILD'S
The Mid & End Station xref's are still on temporary hold waiting
for
input from the various groups (IOO, ISC,COS).
PSL/IOO XREF LAYOUTS FOR ILD'S
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.
OPTOMECHANICAL ILD LAYOUTS
Work has been pushed back, however as soon as a few more layouts are
updated, the Opto-Mech ILD's will be revised to next engineering
release as well as being presented on the new (minor changes) drawing
template.
CABLE TRAY LAYOUT ILD'S
The rough draft of the plan (sheet 1 of a bunch) is still being
upgraded to various changes in equipment. Next will be the elevations
which will probably be started Tuesday or Wednesday of week of 6/30/98.
Bill Baldwin already has various section cuts completed and in Document
Control. Plan with section views will probably be released by the first
of next week with elevations scheduled to follow.
SEISMIC TABLE BALANCE WEIGHTS
Blanks, cut & chamfered, were delivered to Mike Gerfens group in
Central Engineering Wednesday, 6/17/98. The parts are drilled &
the
vacuum release projections are completed in half of the parts.
Hopefully they will be finished by tomorrow, Friday. They will then
be
given to Yehuda for cleaning & to Ed for shipping to Hanford ,
by
7/3/98.
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. This could be accomplished by middle of July.
Cable Tray Specification
The text and photographs for the second draft of the specification
have been finished, distilled, put on the network and await the
addition of several CAD drawings. Paul Kabot is working on the
latter. He will add two drawings to the specification and will
include Baldwin's section views which show keep-out zones for the
cable tray installations. The document, minus elevation views
(in CAD), will be put out for review Friday, 26 June.
CC revised first draft of the production drawing for the Beam Splitter
Suspension Machined Weldment. Currently working on same for the 2K
Folding Mirror Suspension Machined Weldment.
RELIABILITY
Nothing significant to report.
1.4.3.3 Modeling & Data Analysis (KB/HY/SA/WM)
Hiro:
Documentation
A tutorial document how to use e2e is completed. It is available in
/home/e2e/Software/docs/e2e/e2e_manuals/T980051_GettingStarted.fm5.
Ed
is writting a tutorial how to BUILD NEW MODULES. This includes examples
using C++, C and FORTRAN. When this is finished, it will be included
in
the document, and will be sent to DCC.
Mode implementation
field_gen and power_meter were updated and tested with modes included.
By discussing with Matt, The choice of the representation of the field
has been changed. This will need a little bit more memory, but the
code
becomes more simplified and will be easier to add complexity to
describe fields. Most of the works done using the template format can
be still used.
Blackburn:
The LDAS team grow by one again this week. We are happy to finally
have Dave Farnham on board. He will be working on C++ class code
development for the LDAS. Be sure to stop by the and say hello to
Dave. KB met with both Phil Erhens and Dave Farnham this week to
present an overview of the LDAS software conceptual design and to
begin the development of the generic API that will be costumized
to fill out the complete LDAS system using TCL/TK and C++ components.
KB began writing a software specification to the generic API which
will be used by the two software developers once they are up to speed
on issues of sockets and TCL/TK.
KB worked closely with PE and DF on issues related to developing the
generic API from the foundations planned in the LDAS Conceptual Design
Document.
* PE studied Tcl/Tk syntax and wrote scripts to exercise my
understanding of it.
* PE attended a meeting with Kent Blackburn and Dave Farnham, wherein
Kent outlined the data analysis system software design
requirements.
* PE studied the application of "sockets" to network communication.
* PE studied Kent's working TclPlugin Client/Server example.
- This week DF has been working on learning about the ObjectSpace
Component Series package which we are planning to use for socket
communication.
- DF compiled the ObjectSpace package on Sirius. The package would
only
compile with the Sun cc 4.1 compiler and the GNU gcc v2.7.2 compiler
(which I installed in my account). The version of gcc present
on
sirius (egcs-2.90.27) would not compile the package. Furthermore,
the
other solaris systems which were running the v2.6 OS would not compile
the package. However, all of them could run the resulting
executables.
- DF attempted to install the package on sadan, however it also has
the
egcs-2.90.27 version of gcc and wouldn't compile. I was unable
to
install gcc 2.7.2 on sadan (the platform is not supported, according
to
the configure utility in the gcc distribution). gcc 2.8.1 also
would
not install, although the Alpha-Linux configuration IS supported in
this release. So, the ObjectSpace package is not present on sadan.
- DF has looked through the package and wrote some code to test the
ObjectSpace socket classes. This consisted of a server running
on
sirius and a client running on marfik. These two programs utilized
the
streaming interface to the sockets to send information back and forth.
ObjectSpace has two streams to accomplish this:
bstream - A binary stream which can be used to transfer
objects. I created a class and used this stream
to
successfully send classes
across the sockets.
tstream - An ASCII text stream (very similar to the
ANSI/ISO
iostream class).
Both streams functioned correctly, however to send user-created objects
across the binary stream requires the addition of several macros to
the
source and header files for the class.
One other caveat: The streams DO NOT use XDR to communicate between
computers. They instead use NDR.
- DF si now working on modifying the ObjectSpace code to allow
compilation under the egcs-2.90 compiler.
Anderson:
Continued work on the LIGO data acquisition RAID prototype, including
installation as part of the 40m data acquisition system. Performance
numbers indicate that this system will not scale to the requirements
needed by LIGO, hence an alternative solution has been put forth to
buffer the data inside a large Sun server (Enterprise 450). The
fault
tolerance that the RAID would have provided can be obtained by either
buying twice as much disk, or for an even higher level of tolerance
duplicating the entire server.
Walid:
I visited VIRGO's Annecy group to work on the Frame class library (Fcl)
and investigate the possibility of using ROOT, a fully Object Oriented
data analysis package developed at CERN, with Fcl.
Prior to my visit the missing piece of Fcl was a complete IO engine.
We have now developed many of the pieces to accomplish this.
We are
now able to write Frames with ADC data, read it back with Fcl, as well
as with FrameLib (VIRGO's C based library). We are also now able
to
read frames produced by the 40m.
We have worked and agreed on the Fcl class hierarchy, sytle and
documentation tool. We also worked on issues relating to compatibility
of ROOT with Fcl.
I had an opportunity to visit Rene Brun at CERN. He is the principle
author of ROOT (as well as PAW and GEANT, which are used extensively
in
HEP). We discussed many issues with him regarding support,
reliability, extensibility as well as many technical points about
ROOT.
We also worked on integrating Fcl with ROOT. It is now possible
to
read frames in ROOT using Fcl, find an ADC channel, and perform some
minimal set of manipulations on the data as well as displaying it in
ROOT.
I have now installed ROOT on our machines here at Caltech and was able
to run some demos. However, I have not yet succeeded in building
a
ROOT executable with the Fcl library under Solaris - We did this on
VIRGO machines which are DEC-Alphas.
What needs to be done as far as Fcl is concerned is to complete the
IO
engine to be able to read/write other Fcl classes, such as those for
trigger data and processed data. Implement Byte swapping, data
compression, a methodical search for memory leaks and provide a
complete set of documentation and examples.
1.4.3.2 General Computing (SS/TE)
MIT:
No Report.
CIT:
1. Larry Wallace is currently up in Hanford installing new systems
for
the lab. He is expected to be back by friday.
2. cdssol5 in 40 meter has been moved from 131.215.114 subnet
to
131.215.113 by upgrading it to solaris 2.6.
3. Booting problem of castor (third floor) has been fixed by updating
it
to solaris 2.6.
4. Problems with two PCs in wilson house were fixed.
5. Samanta Bench has started working in System Admin group. She is closely
working with Tatsuya Murase to become more familiar with
existing
the systems.
Arranged and processed the paper work for 14 trips. Worked on
the ever present backlog of Expense Reports.
Filled in wherever possible in Liz's absence.
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 Staff Payroll, incorporating various recent changes,
new hires, terminations and the processing of Vacation/Sick Leave
accounting.
Rita Torres:
For I. Petrac did change order No. 4 to Senior Flexonics
with subsequent edits, change order No. 2 to CDI
Managed Cadd Services, change order No. 2 to March
Metalfab, attachment to change order No. 3 to
Brookfield Machine, updated a JPL work order,
For E. Jasnow prepared Addendum No. 1 to IFB EJ-297
for Hanford Water System Integration, also Addendum
No. 1 to IFB EJ-298 for Hanford Staging Building. LHO
will distribute EJ-298 addendum.
Arranged for three eye exams, have several more to
do. Will arrange soon for new people to view the
safety video .
For A. Lazzarini packaged TRC Spectral Data volumes
for shipping to F. Raab at LHO. For G. Billingsley ordered
an article from our library system.
Organized a binder with dividers of signed/released
laser safety procedures, have these available in my office.
Completed gathering names of LIGO people on 3rd &
2nd floors and basement. Have listed names in each
suite, posted at each entry. Started making name tags
that will eventually appear on cubicles.
Dorothy Lloyd:
Entered AP30 reports into the database. Continued processing the constantly
growing requests for PR's. Processed POs, Change Orders, Check Request,
etc. as well as an extremely heavy load of invoices. Followed up and
tracked many problems with invoice payments. Continued to monitore
and
support the temp. Provided clerical support where needed.
Elizabeth Wood:
Spent four days at the Hanford Site providing sustenance for two
meetings. Learned a great deal about catering and room location:
locate
the food and drink in the same room as the meeting.
Typed and copied the Safety Committee's Report on the Hanford Site.
Talked to Jay Heefner about hiring another undergraduate for the summer.
Got the information for Jill Berry's I-9 form so we can finally put
her on
Caltech's payroll.
Arranged with Irene to arrange with Voyager Travel to change six flights
for
travelers to the Hanford site.
Provided clerical assistance as needed at Hanford during the meetings.
=========================================================
LIGO Hanford Observatory (LHO) Operations (F. Raab)
=========================================================
General Items:
--------------
An Operations Procedures and Safety (OPS) Review was held at LIGO
Hanford Observatory on June 23-24. The committee of C. Scislowicz,
J. Harrell and R. Orr spent two days reviewing our procedures,
evaluating our safety program, touring facilities and meeting staff
and sharing many helpful suggestions with us. We have already begun
the process of incorporating their recommendations into our lab
operations.
On June 25, a Readiness Review was held for the first beam-tube
bakeout at Hanford. The committee, consisting of M. Coles, D.
Coyne, L. Jones, A. Sibley, R. Weiss and J. Worden, chaired by
F. Raab, reviewed the conformance of the bakeout preparations
to the preliminary design and the resolution of action items,
inspected the field installation and reviewed the status of
preparation, equipment, spares, etc, and discussed procedures
and safety issues. The committee was unanimous in its judgement
that the team and preparations stand ready, subject to
availability of the vacuum gate valves (currently under PSI control).
The full committee report is available throught he DCC as
LIGO-L980342-00-W. This represents a major milestone in a truly
impressive project and the impending ratcheting up of intensity
in activities at Hanford.
Thanks to Elizabeth Wood for coordinating these meetings!
REU Projects:
-------------
(R. Savage)
Summer REU Students
-------------------
RGA ANALYSIS (Betsy Weaver)
Since the unloading of the bake oven hoist and stand from last week,
we
(Kyle Ryan and I) have been busy anchoring it to the floor, shimming
it,
and connecting valves and pumps to it. We still have a lot more
connecting
to do. We had to make a few modifications on some of the holes
in the
stand and hanging belljar eye-connecting pieces before we could finish
hanging the belljar. This wasn't too difficult, but did involve
a short
trip back to Larsen Mfg. and some grinding. The belljar has now
been
hooked up and hoisted up and down numerous times. It seems to
be working
great.
We have also continued our assembly of the electronics panel by finally
hanging it on the Unistrut wall mounting and drilling quite a few holes.
I
mounted the numerous heating blanket connectors, thermocouple connectors,
fans, and filters two days ago, while Kyle continued arranging the
instrument setup for the interior of the panel. Our next step
is to align
the belljar to the baseplate, via some adjusting screws in the baseplate,
to get a perfectly flush seal. For the next few days, Kyle will
have me
flanging pieces together like crazy! Everyone says it's good
practice.
**************************************************************************
* Builds character too! FJR
**************************************************************************
PSL CHARACTERIZATION (Janet Casperson)
The majority of this week has been spent between working on two projects.
The first of these dealt with the expected arrival of the triangular
premode cleaner from Caltech later this week. I have read up
on the cavity
and performed some calculations to determine the location and size
of the
waist within the cavity. Also I am continuing to work on a calculation
which will allow me to determine the focal lengths of the cylindrical
lenses needed to circularize the output beam of the 10W laser.
Secondly, I
have been trying to set LabVIEW up to monitor the power output from
the
main beam and from each of the laser's pump diodes, in order to determine
the correlation between them.
TECHNICAL SLAB CHARACTERIZATION (T. Islam)
All I did was make calibration measurements using the
-1000 accelerometer and -200 accelerometer. I found that their voltage
sensitivities were roughly the same (25 Volts/g @ 0.82 Hz). Since the
amplitudes of acceleration were relatively large, I did not attempt
to
identify and isolate noise sources (also, I did not know how). I assumed
a
10% error in the sensitivity results. There were certain possible
irregularities in the experiment. For example, I used string to suspend
the -200 accelerometer, but medical tape for the -1000 accelerometer.
I
did not measure the voltages on the 15 inch initial displacement of
the
-1000 because, at a scale of 100 mV, I could not get accurate peak
data. I
assumed that 0.5 V was the limit on the accelerometer, but actually
those
voltages were outside the visible range of the oscilloscope. I considered
repeating those parts of the experiment, but the data were consistent
enough and did not need to be accurate enough to warrant a repeat.
Furthermore, in the regression equation I assumed a zero constant
term relating voltage across the accelerometers and acceleration. I
have
finished a report of this preliminary data, and I have not put in the
spectral data because this rough calibration does not warrant that.
I have
also not done any measurements of the background noise (with the Giaime
amplifier and preamplifier) because, right now, I am not certain how
to
isolate noises from the amplifier, the preamplifier, the FFT, the
accelerometer, as well as the background.
ALIGNMENT SENSITIVITY OF ADVANCED INTERFEROMETER
CONFIGURATIONS (M. Zwikel)
My work this week on alignment sensitivity had been about half
computer-based, and half notebook paper based. I've extended
some of the
basic Mathematica simulation notebooks to include angular misalignments
and
have run some preliminary scans. In order to understand what
I see on all
of LIGOs ports, Daniel suggested that I carry out a full calculation
of the
evolving fields and demodulated output. I've therefore spent
the last day
and a half deriving such results and creating a new Mathematica notebook
to
handle the hefty matrix manipulations. Next week should bring
some more
advanced simulations, informed interpretations, and a coherent tree
structure of how I'll be examining and cataloging the numerous alignment
issues.
Bake Oven:
----------
(K. Ryan)
As of 6-25-98 the bake oven has not been pumped down or heated.
Only about 50% of the vacuum parts and 20% of the control panel
parts have been installed at this time. We have not been able
to make up any of the time (one week) lost earlier this month
(hoist delivery delay) as of yet.
The operation of the hoist, connection and removal of the bell jar
to the base plate and ergonomics of the valves etc. have proved
better than expected. I won't make any more completion
predictions at this point as my previous attempts haven't been
close enough to be of much scheduling help, but progress occurs
daily and I expect to be able to spend a larger portion of my day
devoted to this project.
HAM 1st-Article Test:
---------------------
(C. Gray, H. Radkins)
Received 84" Conflat Covers and Door Covers. Have to be deburred,
sanded
and cleaned. Currently, the Conflat covers are in place.
Final Design Review was conducted on Friday (6/19).
HAM Doors removed; have been placed just outside of 1st Article Test
Area
(will be moved closer to a wall to be out of PSI's way).
E-Nozzle Conflat Guards received from , but were not adequate for use;
temporary covers were made and are being used for two E-Nozzles.
(Hytec
had designed some covers and they may be here 6/25)
Second Rail System cleaned and installed on HAM-13.
Bill Miller arrived to begin work on preparation for Phase 3 (starting
with
building of
Have been working with Bill Miller about modifying handles to Minor
Rails
of Rail System.
Began assembly sequence for insertion of Support Tubes into HAM-13;
started
with Support Tubes on Roller System. New Titanium Nitride bolts
used to
replace Carbon Steel bolts previously used. One of the first
two bolts
seized on us; bolt could not be removed. This Support Tube will
be removed
and the fourth Support Tube will be used in its place. To prevent
further
galling powdered graphite (lubricant) will be used along with the Titanium
Nitride bolts. Will also tap holes of Support Tubes prior to
usage.
Optics & Lasers:
----------------
(D. Cook)
Most of my attention this week was spent working with the Operation
Procedures and Safety Committee. I have implemented some temporary,
stop
gap measures, as an immediate solution to making the changes recommended
by
the committee regarding laser safety issues. A more elaborate, permanent
solution will need to be put in place in the near future. I believe
a lot
of good came from the meetings,from the committee members, our visitors
and
LHO staff.
Dust monitoring will be under way in the LVEA, in particularly around
the
HAM first article Test.
We are also making up the cables to connect the Lab View Computer to
the
LIGO 10watt laser to study its parameters and gather pertinent information.
Lab supplies and equipment continue to arrive.
Computing Systems:
------------------
(C. Patton)
Thanks to Larry Wallace and Dave Barker, we now have 2 Sun Workstations
and 2 PCs on the T1 line. The next week will be a test period,
working
out any bugs on these computers, before we move other computers over.
The T1 line is still temporary, so we are planning to move only those
computer users who require the higher bandwidth or greater reliability
to the T1 line. This will free up some ISDN line IP addresses
for the
other existing and new computers.
We have also assigned the first of our Washington mountain computer
names. The General Computing server is now named Rainier and
the Sun
Ultra 10, future mail/www server, is named Apex.
There is still more research and work to do to setup the mail server
and
establish a secure "Firewall" computer. For now, we are still
getting
our mail on acrux and our security remains the same.
Beam-Tube Bake Out:
-------------------
(M. Lubinski, M. Guenther, K. Stiff and W. Althouse)
Electrical Support Services Contract (input from Sun River):
Accomplishments:
Placed the 500 MCM Power Cables to RT-1, RT-2, RT-3 and RT-4.
The PUD
energized transformers at all locations(5) except at D/C power supply
locations(2). The B-2 panels were ground fault tested by Apparatus
Services and Engineering. Data Cable and other required services
were
connected this week to allow preliminary testing and checkout by Caltech
staff.
Problems/Concerns:
No problems or concerns unresolved this week.
Sun River has completed laying out the MCM 500 DC power cables and trimmed
them to length. They have begun setup of the "D2" boxes, these
are the
transition boxes for the MCM 500 to High Temp 4/0 cable for connection
to
the beam tube stiffening ring.
Cryopumps:
Pump installation is complete including leak checks at ports Y2-2, 2-3.
Kerry Stiff has starting pump installation at port 2-6.
Data Acquisition and Temperature Control System:
Preparations continue for the move of the Bakeout Process Control computer
to the End Station on Y arm. The data cable and I/O Boxes have
been placed
along the length of the Y-2 beam tube module and communication with
the
boxes has been verified along the entire 2 km length of cable.
**************************************************************************
* In late-breaking news, a leak has been found
in one of the 10" VAT valves
* on the Y-2 arm. The huddling has begun on how
to respond to this latest
* wrinkle. FJR
**************************************************************************
For additional information about this report, contact sanders@ligo.caltech.edu