The Project Control Meeting
Agenda for Monday August 17, 1998 will be:
(Meeting time: 10:30 am Pacific Time)
WBS 1.1.1 Vacuum Equipment(Worden)
1. Gate Valves:
Three valves are complete and accepted.
a. WGV11 (Y-end) Complete.
b. WGV12 (Y-mid BT) Complete.
c. WGV17 (Y-end BT) Complete.
d. WGV14 (X-mid) Passed 5 cycle test. Ready for in-situ leak test
e. WGV18 (Y-mid) Passed 5 cycle test. Ready for in-situ leak test
f. WGV20 (X-end) Passed 5 cycle test. Ready for in-situ leak test.
g. WGV16 (X-mid BT) 50 cycles underway.
h. WGV15 (X-mid) Waiting for bellows.
i. WGV19 (X-end BT) 50 cycles completed.
j. WGV3 (LVEA-48) Passed 5 cycle test. Ready for in-situ leak test..
k. WGV5 (LVEA-44) Waiting for bellows.
l. WGV10 (Y-mid) Waiting for bellows.
m. WGV6 (LVEA-BT) Passed 5 cycle test. Ready for in-situ leak test.
n. WGV8 (LVEA-BT) Started work today(8/12)
2. PSI is starting to pump down the x end station in order
to begin their last bake out. Two valves will get their
final leak test at this time.
Livingston Vacuum Equipment (Allen Sibley)
CBI has begun pump out of the y arm. The rough pumping has been completed
to 4*E-2 torr and the turbo pumps have been connected to the beam tube.
Leak checking is complete and the turbos are about to be started.
PSI is in the process of electrical and pressure testing in the x arm
end
station. Additionally testing on the LN2 piping and clean air compressors
is in progress.
WBS 1.1.2 Beam Tube (Cecil Franklin)
LA."X" Arm
1. CBI has completed the removal of all Vacuum Equipment and Data
Acquisition System from the "X" Arm.
2. CBI Craft Labor are in the process of re-installing and leak testing
all
"H" hardware that was removed from the "X" arm during the Accumulation
Testing.
3. R.Weiss is in the process of evaluating the data results of the
accumulation testing.
LA."Y" Arm
1. CBI is in the process of completing the installation and testing
of the
Vacuum Equipment and Data Acquisition System for the "Y" arm.
2. The "Y"arm was successfully roughed down by CBI on 8-7 thru 8-10.
3. Two Main Turbo pumping cart were installed and leak tested at pump
ports
#9 and #10 at the Mid- Station.
WBS 1.1.4
Hanford Construction (Otto Matherny)
Levernier
All the outstanding items are complete.Levernier
has completed
their contractual obligations. At the
present time we are
reconciling all the payments and credits
for the final
payment.
(No change this week)
OTHER ITEMS
The State Health Department, with King
Soft Water and JUB
Engineering are trying to resolve the
potable water issue.
Livingston Construction (Gerry Stapfer)
Several deficiencies were noted in the fire water plumbing system. The
contractor has been notified and has started to fix the items.
Asphalt paving on the Y arm has started. This should be completed by
next
week.
DEMCO has switched our power to the new substation. This has improved
our
phase to phase voltage difference considerably.
Date: Fri, 14 Aug 1998 08:23:12 -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)
--------------------
Due to our low input power we have focussed attention this week on the
power recycled Michelson with the aim of ascertaining what dominates
the fluctuations that we see at the dark port (e.g. position or
orientation fluctuations?). There appears to be a combination
of
effects at work. The South Vertex suspension design has pendulum,
yaw
and sideways motions all at the same frequency; the sideways motion
is
not damped and appears to strongly couple through into SV longitudinal
position. The beamsplitter servo does not appear to have enough
gain
to fully correct for this. We are thus considering two approaches;
Keith has designed a digital resonant gain stage for the sideways
frequency which could be incorporated into the servo or we can try
to
raise the overall gain of the BS servo. This second approach
is
complicated by the fact that if the BS has any local position damping
there is a resonance in the damping circuit which shakes the BS in
position at 31 Hz. We are thus investigating running both the
recycling mirror and beamsplitter with no local position damping at
all; the position of these optics being controlled purely by the
inteferometer signals.
Yehuda scanned two Pockel cells for us, both of which passed and so
we
are now scheduling the vent to replaced our present cell.
----------------------------------------------
Interferometer Sensing and Control -- M Zucker
(WBS 1.2.1.1.6, 1.2.1.1.7)
----------------------------------------------
ISC fab/delivery issues (Zucker)
--------------------------------
We have sent 8" quartz viewports back to Insulator Seal for re-cleaning.
They arrived with excess particulates, which we believe are traceable
to
incomplete
removal of a temporary dam/gasket used in the sealing process.
MDC apparently used unacceptable packaging techniques which
caused contamination on outside faces of our other (5") ports.
Yehuda and
Helena worked hard to clean them up, and in the end they were judged
acceptable. Corrective measures are being discussed with the
vendor for
future deliveries (if any).
EG&G now says it will not be able to ship RF quadrant diodes for
the
wavefront sensors until early October (recall this was one of the "lost
orders"). It is not clear if this would affect shipment of IOT7;
in
case it does we're looking at other workarounds, e.g. cannibalizing
prototype WFS heads.
Blue Sky is late with optical lever lasers, having fab trouble (see
below). We have one prototype unit which we can ship while we
work
through their problem (we may be able to solve this by just derating
their power spec a bit, we have ample margins).
ASC Design and Fabrication (K.Mason, M.Smith, M.McInness)
---------------------------------------------------------
Myron has begun assembly of the MMT3 optical lever using the Blue Sky
laser from our prototype. Blue Sky has not shipped diode lasers
to us
due to problems maintaining power stability requirements.
Work continues on procurement and detail design of fabricated componants
for the IO Sensing Tables.
An initial design layout of WISCT-7, WISCT-1, and LISCT-1 has been
started and sent to Nergis M. for design of Guoy phase telescopes.
LSC digital control testing (Daw)
---------------------------------
This week I have continued timing measurements and software
development on the VME test stand at MIT. I have measured
the processing time for a 2nd order section (sos) of an IIR filter.
The measured processing time is 0.24 microseconds per sos.
I have written a subroutine that allows the implementation
of n identical cascaded 2nd order sections in a servo, where
n is arbitrary and can be altered in real time.
LSC lock acquisition (Ware)
----------------------------
Met with Daniel Sigg, his SURF student, and Ray Beausoleil at Hanford
to discuss using Ray's model to study effects of alignment on lock
acquisition. It looks feasible, depending on the speed of the
model
and speed of building a control circuit around the multi-mode plant
(perhaps not that difficult -- Ray said he would like to do this, and
that the plant is designed for it, more or less).
Stan came up with an elegant phasor explanation of the IFO sign
changes through the various states -- I've been working on deriving
the mathematical equivalent for my own edification and quantification.
The confusion about the state in which the sign change occurs arose
from the change in pick-off position from upstream of the beamsplitter
to taking the pick-off from one of the input test masses. This
will
be documented in the Big Book, T980066.
I'm off to the Boulder LSC meeting and some climbing in Colorado, and
will resume work on the FDR issues, modeling lock acquisition with
the
E2E and spatio-temporal models (STM from now on; Ray's code), and
implementation of the lock acquisition controllers in code when I
return 8/24.
ASC implementation (Zucker for Mavalvala)
-----------------------------------------
Nergis is primarily working
out the Guoy phase telescope lens parameters and spacings based on
the
draft ISC table optical path layouts (see Ken Mason's report above).
-------------------------------------------
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 PSL consistently remains locked to the reference cavity during
weekend performance runs. Monitors of the reference cavity transmission,
laser output power, master oscillator output power show very little
change
over the 72 hour period.
- The VME-based pre-modecleaner (PMC) servo has been installed and initially
tested. The servo has been used to lock the PMC to the laser,
whilst the
laser maintains lock to the reference cavity. Any adjustment
made to the
PMC servo, such as removing the PMC rf sideband input to the
phase-correcting Pockels cell or ramping the same input, did not cause
the
laser to lose lock to the reference cavity. No adverse effects
with
frequency stabilization servo were observed when the PMC servo was
run
simultaneously.
Input/Output Optics -- Dave Reitze, UF
-----------------------------------------
David Tanner and Dave Reitze are attending the LSC meeting at Boulder, CO.
Mode Matching Measurement -
Bullseye Sensor: This week we made a decision to go with a pre-mode
cleaner. A photodiode and a pre-mode cleaner are borrowed from Caltech
and
we are preparing to impliment the locking of the mode cleaner.
The fixed reference cavity solved the problem of noise caused by the
relative motion of the cavity to the input laser beam since the table
is
flowted. But at the same time, it creates a new problem of acoustic
noise
acting on the unsuspended, high finesse cavity, which makes locking
of the
cavity difficult and noisy. Most of this noise should be common
mode to the bullseye segments.
We will take a step back and allow some isolation of the cavity to the
accoustic noise.
High Power Testing -
We continued redesigning the layout of the optical path from the
polarizer placed before (upstream) the Faraday isolator to the viewport.
Based on the numbers provided by the Manufacturer (Karl Lambrecht)
the
back-scattered light from the interferometer is calculated to be reflected
by the polarizer (model MGLQD15-V 1064 nm) to a side with an angle
of 73.1
deg (reflected backward by 26.9 deg from the line exactly perpendicular
to
the beam path). We also calculated the transmittivity of the polarizer
and
the half-wave plate (Karl Lambrecht, model MWPQA2-15-V1064 nm) that
we are
planning to use for the Faraday isolation. They are calcuated to be
96.5%
(polarizer) and 99.4% (halfwave-plate). The total transmittivity of
the
Faraday isolator (polarizer + Faraday rotator + two halfwave plates)
is
calculated to be 93.4%.
Core Optics Procurement and Metrology -- GariLynn Billingsley
-------------------------------------------------------------
The ground glass motor mount for the IR interferometer has been sent
to
Veeco in the hopes that installation of a vibration isolation material
on
the mount will keep the motor from shaking the interferometer.
Veeco has
no better motors in stock at the moment, our motor runs smoothly when
started but becomes intermittently unstable after running for a while.
The
computer which runs the interferometer is plagued by device problems,
we're
working almost patiently with the various vendors to get the machine
functioning.
Joe Lamb of Veeco, who has been our primary contact, and who has been
extremely valuable in troubleshooting our various problems, has announced
his resignation from Veeco.
SPETMs 07 and 08, polished by General Optics have been shipped to NIST
for
test.
The last 2K ITM has arrived from CSIRO and is shipping to REO.
Two
Beamsplitters are shipping back to CSIRO to have the coatings removed
and
to be repolished. CSIRO estimates mid-September for the completion
of the
first repolishing. CSIRO is in the process of completing
the fifth and
final beamsplitter, BS05. We are hoping for a good coating on
that one.
The other two Beamsplitters which need repolishing will be started
once we
have a successful coating on BS05.
Core Optics Coatings -- Helena Armandula
--------------------------------------------------
REO Contract - COC's / UFL coatings: BS-02, one of the badly stained
beam
splitters, was shipped to REO for Ramin's evaluation.
A decision has been made to re-work all the coated beam splitters.
Coating of UFL substrates, now at REO, will be completed on Sunday.
The plan is to start coating Caltech test pieces on Monday.
General Optics: Source inspected 3 telescope mirrors (UFL). They will
be
shipped to REO on Friday.
Finished 6 storage holders for UFL 2" mirrors.
Core Optics Support -- Michael Smith
------------------------------------
ETM PO BEAM RELAY LENS:
D. Rose is redoing the calculations for a shorter focal length relay
lens.
M. Smith is completing the write-up of the description of the lens
and
conceptual mounting drawing, to be sent to ISC.
ISC TELESCOPE:
Put the ISC telescope on hold! Mike S. is working with Nergis to analyze
the delivery of a convergent beam to the WFS system, which would eliminate
the ISC telescope and would minimize focus sensitivity of the COS telescope.
PO TELESCOPE
An AUTOCAD draftsman will be hired to take over from K. Mailand and
complete the detail drawings for the PO telescope subassemblies and
components.
BEAM-DUMPS:
D. Rose has completed a master list of the coordinates of ghost beams
in
the 2K and 4K IFO. A. Bagdalian is continuing the ACAD placement of
beam-dumps in BSC 7. The prototype double beam-dump with mounting structure
will be completed by the CIT shop early next week. It will undergo
vibration testing.
ITM BAFFLE:
A. Rosa has completed a 3D layout of the ITM baffle and support structure
in the spools WBE5 and WBE6.; the same design will be modified slightly
for
placement in the midstations and endstations. P. Kabot will work with
a
(second) AUTOCAD draftsman to make detail 2D drawings of the 3D designs
for
the COS baffles.
TEST EQUIPMENT:
IR AUTOCOLLIMATOR
A stock Davidson alignment telescope is being considered as an alternative
to the focus modification of the autocollimator tested previously.
The
alignment telescope is effectively a focussing autocollimator with
the
optical axis accurately aligned with the outside barrel, which is exactly
what is needed for the COS telescope alignment. M. Smith is completing
a
write-up of the COS alignment procedure.
--------------------------
Isolation Group -- M. Fine
--------------------------
Seismic Design (Mike Fine)
--------------------------------------
1. Scissors Table Testing:
Hytec is beginning the hysteresis/cycling tests, which are expected
to
be completed early next week. The FEA is showing similar trends when
considering the gaps that exist between each finger and how they interact
with one another. The FEA shows that the stiffness is very dependent
on
the size and location of the gaps and how the load is transferred from
the
top plate to the bottom plate through the hinge plates. Hytec has begun
putting this information together into a report that will outline their
findings.
2. Coarse Actuator-Manaul Adjustment:
Cost estimates have been received for the alternate HAM actuation
design. The design will cost a minimum of $4,698 for hardware and will
require manual alignment and positioning.
3. Damped Coil Springs Testing:
Fatigue testing is underway on both the epoxy and non-epoxy springs.
Each spring will be cycled 1000 times from 0 to 100 lb and
tested to determine if there is any degradation in the damping
characteristics. Hytec is in the process of writing up the results
of
the 3 types of springs that have been tested to date.
Suspension -- (Janeen Hazel/Mark Barton/Mike Fine)
-------------------------------------------------------------------
1. LOS Assembly Fixture:
Conductive teflon screws and Teflon washers went to Yehuda for cleaning
and baking. The order for production of LOS clamps was placed with
Schober's.
The delivery is estimated to be 3.5 weeks.
---------------------------------------------------------
Detector Systems Engineering -- D. Shoemaker/D Coyne
(WBS 1.2.1.1.9)
---------------------------------------------------------
Global Diagnostics System
(Rolf Bork, David Shoemaker, Daniel Sigg)
--------------------------------------------------------------------
No report.
Physics Environment Monitor (Alex Marin)
-------------------------------------------
The last few weeks, we were involved into the 1st
SEI/HAM article test. PEM contributed with active e-m
shakers, seismometers, geophones (new item), accelerometers,
as well as man power. The results will be released soon.
The PEM equipment performed well. The geophenes used in
this tests performed well, but one channel was bad from
the beggining. We also used the PEM DAQ system for drift
measurements as well as for data acquisition from various
seismic sensors. The main limitation of the DAQ system was
the insuficient number of antiallias filters.
Optical Contamination (Daqun Li)
--------------------------------
All the ringdown and mode spacing data still do not show significant
changes this week (cavity one: loaded with vac-seal for three weeks;
cavity two: reloaded with viton seals for one week; cavity three:
running empty for qualification).
Finished the electronics and cabling of six scatter photodetectors used
as a scatterometer and all the six detectors are found to respond to
an
optical input. Characterizing the performance of the scatterometer
on
a CVI 3" optic is underway with the Loss Scanner.
-----------------------------------------
Control and Data System -- R. Bork
(WBS 1.2.2)
-------------------------------------------
Hanford Installation
================
- Completed assembly of suspension controller test stand and installed
in
optics lab.
- Assembled Input Optics suspension control rack for 2K IO.
- All CDS racks mounted in LVEA.
- Initial data acquisition software integration complete; test system
now
running at Hanford.
- PSL installation to begin Sept. 8.
Louisiana Installation
=================
- Began testing of vacuum controls with PSI on right end station (8/13).
- Fiber optic installation spec to be released next week.
Input Optics
===========
- Add on board built for EO Shutter Controller; awaiting parts to complete.
- MC demod board RF section being modified; parts placement for board
design begun.
Timing
=======
- JXI is starting to work on the firmware programming for the
GPS receiver modules. We are iterating on the word format to read out
the
time information.
- The first clock fanout module PCB has been layed out and
is ready to send out for fab. The second board being layed out now.
PSL
=====
- Delivered the PMC Servo system for the PSL. We are in the process
of
debugging it.
- Will shortly deliver the Intensity servo (1 to 2 days) for testing
in
the lab.
- Redesigned the box to share the frequency servo phase correcting pockels
cell with the PMC modulation.
| CR-980031 | WBS 1.1.2 | Beam Tube Taxes, Cleanliness Tests, Clear Caps, and Work Stoppages | L. Jones |
| CR-980032 | WBS 1.1.2 | Beam Tube, Purchase of Equipment Used for Fabrication and Potentially Useful during Operations | L. Jones |
| CR-980033 | WBS 1.2.1 | Detector Installation Travel for 1998 | S. Whitcomb |
| CR-980034 | WBS 1.1.4 | Hanford 5000 Sq. Ft. Building plus Mezzanine (Addition to CR-980003) | O. Matherny |
| Action No. | Description | Responsibility | Assigned Date | Due Date | Priority |
| 1 | Prepare DRAFT Operations Work Plan Budgets for FY 1999 Proposal | P. Lindquist | August 6, 1998 | August 20, 1998 | Medium |
| 1a | Provide information for 1 above | F. Raab/M. Coles | August 6, 1998 | COMPLETE | Medium |
| 2 | GSA Vehicles for Hanford | E. Chargois | August 6, 1998 | Medium | |
| 3 | Vehicle Safety - Incorporate into Orientation Process | M. Coles, F. Raab | August 6, 1998 | Medium | |
| 4 | Proceed with Credit Cards for Sites | E. Jasnow | August 6, 1998 | High | |
| 5 | Determine how we pay BO tax due State of Washington | E. Jasnow | August 6, 1998 | Urgent |
A Revised Proposal for FY 1998 Advanced R&D ($1.1 million) and a Supplemental Request for FY 1998 LIGO Operations ($1.1 million) have been prepared and sent to the Office of Sponsored Research for their review and approval.
A DRAFT of the Monthly Progress Report for the end of June 1998 has been distributed for comment.
We received the accounting reports for the end of July this week, and
it appears that most of the correction submitted have been entered. Open
commitments decreased by $16 million.
The audit team is no looking at the remaining amounts in the "beginning
balance." There are approximately six pages of entries to be reviewed.
Most are small, but there are several larger ones that are suspicious and
will be checked (Selland Construction). It appears that whenever actual
costs equal the total purchase order commitments, the purchase order is
automatically closed by the system, and the costs are moved into the beginning
balance. This is ok except it makes it difficult to use the beginning balance
as an indicator of possible problems.
A total of 43 documents were electronically submitted to the DCC. They were reviewed and placed on-line. Also, a total of 75 documents were added to the database. The following figures represent the breakdown by category:
| C | Contractual/Procurement | 28 |
| D | Drawings and CAD | 38 |
| E | Engineering Documentation | 3 |
| G | Graphics/Presentations | 0 |
| L | Letters | 5 |
| M | Management/Policy | 0 |
| P | Publications/Formal Notes | 0 |
| T | Technical Notes, Informal | 1 |
Five custom view- and photograph presentations were assembled for lecture and publication use.
PHOTO ACTIVITY
The buzz surrounding LIGO activities continues to mount. This is evident in the growing number of requests for LIGO photos, images and quaint memorabilia. Additionally, LIGOnians are invited to watch for next month's issue of Caltech's "Engineering and Science" magazine, whose cover story features a superbly written and researched story on LIGO by Caltech's Jane Dietrich.
ACTIVITIES
Work continued with the Policy/Procedures Committee. Additional policies already published were condensed into succinct summaries for easy reference. First drafts of policies not yet published have been submitted and will be condensed in the coming week. These will then be edited before submitting to management.
Continued to work with the CB&I End Item Data Package to provide spring rates for all expansion joints in module Y1, X1 and X2 at Hanford. To find the spring rates, a paper trail from one document to another was required to chart the matching information. These three modules are nearing completion.
A handful of semi-annual progress reports were received from LSC members. These were formatted and made into PDF files. Following approval from Barry Barish, they will be placed on-line. Another 20+ are anticipated in the coming week. Additionally, new MOU's and attachments are expected.
Preparations are made for quick processing of all the LSC presentations
that will follow the closure of their meeting this week. These will
be treated as high priority and will be on-line by next week.
>From: Kris Duncan <kris@ligo.caltech.edu>
Updated the schedule value of milestones for the Vacuum Equipment effort and calculated the reported earned value for month ending July 1998. Continued to input earned value for the Seismic Isolation/Vibration task.
Completed the replanning effort for the ISC task in the budget planning module of COBRA.
Reviewed and analyzed the CB&I and PSI monthly status reports for correlation to the LIGO reports.
Completed downloading and processing of actual costs to date from CIT finance into COBRA. Initiated a reconciliation of those costs. Distributed to task managers the July 1998 EAC update worksheets. The EAC worksheets are due back to Project Control on Monday, August 17. [I would like the task managers to review their Estimate-at-Completion data carefully this month given the new Costs and Commitments data discussed above. We are slipping the cost/schedule review to Monday, August 24, 1998. - pel]
Initiated review of CR-980031 and CR-980032 for inclusion into the August 1998 CSSR pending CCB approval.
Finished entering schedule updates for the month of July. This entailed the reconciliation of all Hytec Changes in Hytec's MS Project with LIGO's schedule in Open Plan; activities were finished, dates were altered, duration's changed, and links revised where necessary. The ISC received a "no change/on track" status for July. So the reconciliation activity for the ISC schedule in Open Plan required a thorough examination of baseline dates, noting which activities were to finish in July and then making the appropriate updates to the IPS for the July reporting period.
Distributed remaining first draft schedules to Task Managers. Awaiting any revisions/corrections. If no changes are submitted by 8/14/98 will begin to finalize the July schedule with the printing of plots, archiving of data, and final drafting of the Project Level One Milestone chart.
Created first draft of the Level One Milestone Chart for the July 1998 reporting period.
1.4.3 Systems Engineering
1.4.3.1 Systems Engineering & Integration (AL, BB, CC, JK, DC)
__Integration Planning: Nothing to report
__Analyses: Nothing to report
__Reliability: Nothing to report
__Integrated Layout/Drawings: Nothing to report
__Mock-ups: Nothing to report
1.4.3.3 Modeling & Data Analysis (KB/HY/AL)
Hiro:
modeling of mechanial structure
During the stay of Giancarlo Cella, we discussed the plan of the
development of the mechanical part of the end to end model. A work
plan,
including necessary developments and other information, is
/home/e2e/Software/docs/e2e/workplan/Cella-Workplan.fm5.
Cella, DeSalvo,
Somuya and Hiro met Dennis to understand the basic structure of the
LIGO
SUS/SEI systems. During Cella's talk at GILA workshop, he will explain
the
basic idea of the simulation structure.
Cella has developed a program for modeling the mechanical strcuture
for
VIRGO. The program reads in a description file describing the mechanical
structure and calculate the dynamics using finite element model. This
enable the program to calculate different kind of SUS/SEI strcuture
without much of programming effort.
Somuya has almost completed his work formulating the dynamics of the
mechanical strcuture. Soon, he will provide formula for a suspended
mirror
with transfer functions of the SUS developed by Gabriela.
When Cella's framework is written for e2e, each piece of the mechanical
structure will be (re-)written, where appropreate, using the formulation
done by Somuya. Also, the suspended mirror system will be used for
the
validation of the model by comparing Somuya's explicitly calculated
result
and Cella's "constructed system from building tools".
The description file syntax was similar to the one developed for Adlib,
and Ed and Giancarlo discussed about the possibility to use the same
syntax as Adlib for the mechanical part description. It turned out
to be
possible by a slight extension of the original syntax. Ed is modifying
alfi so that the same GUI program can be used for constructing the
mechanical strcuture. Ed is writing the interface between the existing
Adlib and the new mechanical part of the code.
modeling of scalar fields
Simulation of the recycled michelson cavity of e2e was validated using
twiddle. During this process, the time dependence of the phase and
amplitude of the field propagation are improved for the case that the
simulation time step is not the same as the one way trip time (or integer
fraction of it). Another important observation was that the length
of the common part of the cavity, recycling mirror to the beam splitter,
should be set the same in those two simulations. There are some transfer
functions which depend on the average length of the two arms.
Full LIGO configuration is tested during this week.
1.4.4.2 General Computing (LW/TE)
MIT:
Nothing to report
Livingston:
Nothing to report
Hanford:
1. The Communications Room/General Computing Server Room has been
organized and set-up so that all of the hardware is now rack mounted,
a
storage cabinet holds supplies, software has been organized and
inventoried, and a User's Resource library has been set-up.
2. MATLAB is installed. The tape robot is rack mounted and
communicating with the server.
3. Added 5 new user accounts, connected more wall jacks in the
Control
Room and Labs, set-up 2 Sun workstations for the CDS group, and helped
with getting several PCs on the network.
CIT:
1. (Barbara K.) Received a few comments and made minor changes to the
new web
site. We're planning to install it very soon.
2. (Barbara K.) Continued working on changes to the DCC database for
traveler
forms. Made additional changes to the doc entry form so LIGO
and non-LIGO part
numbers may be entered. Enhanced the Master List report so it
can be based on
Doc Date or Entry Date and can be sorted in several ways.
3. (Surresh)Finished moving active users accounts from Manx to Sirius
by
refering responses from various users and also checking through Ligo
directory
about active users.
Full Backup (Dump0) of Manx has been accomplished as a part of migration
from
Manx to Sirius. We will be able to put Manx off-line by friday.
4. Made a backup of /usr3 partition of Feline as a request made by Janeen Hazel.
5. Installed Solaris 2.6 on two Sparc 5 workastions (denebola, mira)
to be used
by LIGO vistors.
6. Opened couple of users accounts.
7. Samantha has worked up a checklist of items to test for when setting
up a
printer on the different PC platforms (Windows 95, Windows 98, Windows
NT)
8. Modified various PC's to handle things at their new locations. This
includes
print services and calendars.
9. After getting a few minutes to start testing the new printer out
in Millikan
we discovered that the lsr4j.x filter needs to be used in order for
both the
PC's and Unix workstations to use the printer. The lsr5 filters would
allow only
unix boxes to print. More testing and additional filters need to be
added as
will as installation of the duplex unit. Hopefully, there will be some
time next
week to work on those items.
10. Samantha has been busy working on PC's at the various locations
checking for
viruses and cleaning up the disks. This past week she has worked on
at least one
PC in each location except the 40M.
11. A momentous occasion has just taken place. The original ligo box
is getting
shipped back to SUN. It was traded in for the 3500 we are installing
at this
time. It should ship out some time today.
12. Because, of some hardware problems on acrux we had to swap the unit
out. The
os still needs to upgraded but we want to do that on a weekend when
usage is
lower.
13. The network connection to Lauritsen has been checked out and it
appears to
be a problem with the unit. Gari B. will be changing the ethernet board
to see
if that is the problem, otherwise they will have to have the people
who supplied
the unit to them check things out.
14. Finally, was able to do some testing on the ATM connection in Millikan.
It
appears that the Network management module may have a problem. It will
be
replaced next week. After that the s/w on it will be upgraded to the
latest
version. This should cut down the latency problems on the unit.
15. Changes have been made to the mail configuration files to try and
eliminate
the acrux part of the return address. So far no luck. More testing
will be
performed but as of now the best way is for users to modify thier information
in
the mail tool to have their return address set to ligo.caltech.edu.
Arranged and processed the paper work for 13 trips to various locations.
Completed some last minute additions and/or changes for the LSC Meeting in Boulder, CO, which required a considerable search of the surrounding area to find hotel reservations.
Worked on the ever present backlog of Expense Reports. Between moving to the 6th Floor of Millikan Library and the extra effort required for the LSC trips I was only able to work on a small amount of reports.
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 Hourly Payroll, incorporating
various recent changes, new hires, terminations and the processing of Vacation/Sick
Leave accounting.
Rita Torres
For I. Petrac did edits to Brookfield change order No. 3 then subsequent change order No. 4. Distributed changed order No. 4 which included several drawings; these had to be copied. Did addendum No. 2 to RFQ IP-301 and subsequent edits. Mailed hard copy of addendum to bidders; this was faxed to them earlier in the week. Did change order No. 27 to MIT, change order No. 3 to March Metalfab, Inc. Also edits to CRDE (Moscow State Univ.)
For P. Lindquist distributed Draft end of June Progress report.
Got a chance to play with FileMaker Pro. To practice I established a database using info on eye exams and laser training (previously on a spreadsheet), while doing this I organized and matched forms from the hospital for each person. There have been 79 exams since 1996.
REMINDER: People leaving LIGO (those working with lasers) must have an exit exam "... prior to departure from the LIGO Project." Ref: Laser Safety Program, Appendix E, III., 3.
Elizabeth K. Wood
For the Checklist Committee, Bill Tyler and I wrote up a draft LIGO Visitor Protocol.
Oversaw the move of Irene Baldon to her new digs in Millikan.
Attempted to assign places to work for the visitors who will be coming to Caltech after the LSC meeting in Boulder. I’ve got desks, but getting computers is another story altogether.
Dealt with the on-going issue of who’s going where. I have not yet gotten a definite date of when the telephone extensions will be moved.
We’ve moved two visitors into Room 358.
Worked with Fred Raab, Richard McCarthy, and HR to get an ad in the Tri-Cities Herald (Washington) to advertise for a new position at Hanford.
The good news is Bobby the phone
guy is here to move, add, alter, and otherwise rearrange the phones in
Bridge. This will take more than a day; please be just a little
more patient.
Dorothy Lloyd
Entered AP30 reports into the database.
Continued processing purchase requisitions, POs, change orders, check request, etc. as well as an extremely heavy load of invoices.
Followed up and tracked problems with invoice payments.
Continued to monitor and support the temp.
Provided clerical support were needed.
=========================================================
LIGO Hanford Observatory (LHO) Operations (F. Raab)
=========================================================
8/13/1998
General Items:
--------------
Front Office:
-------------
REU Projects:
-------------
(R. Savage)
TECHNICAL SLAB CHARACTIZATION (T.Islam)
Right now I am finishing up my measurements (I will have it all done
by
this Thursday, hopefully), and writing up my report. Several things
I have
found out: the concrete slab attenuates vibrations better for higher
rather than lower frequencies (and that holds for the air gaps), and
that
the flexural modes of the concrete foundation is excited significantly,
if
not comparably to, the rigid body modes of the concrete foundation.
I will
finish the first draft of the paper, with all data collated, by this
Sunday.
I will ask Richard McCarthy for computerized blueprints
of the
different LIGO buildings, and especially of the y end station and y
mid
station. Pretty much all I have left to do is write up whatever data
I
have. I plan on sending down whatever data I have to Paul Macalden
at
Parsons for review.
Bake Oven:
----------
(K. Ryan)
Earlier this week, Betsy and I vented the bake oven
so as to facilitate the relocation of some of the
vacuum
components. We moved the rga calibration gas
(temporary
arrangement) such that it was plumbed into the bell
jar directly.
We did this so that we could use Argon (one of five
gas species
in cal gas) to help determine the overall pump speed
of the rga
arm and to measure the correction factor needed
to adjust pressure
data measured at the rga to more accurately reflect
the actual
pressure in the bell jar itself.
We spent more time than was anticipated
trying to get
data that we could believe in. At this time,
it looks as if
the rga needs to be "calibrated" for the electron
multiplier
mode. It looks ok in Faraday mode but is off
by as much as
a factor of 10 with the electron multiplier on.
It also looks
as if the pump speed of the little turbo which pumps
while the
rga data is obtained is too high. If my observations
are correct,
we may need to have an orifice machined to conductance
limit the
little turbo.
I did get some help this week with
fabricating a few of
the cables required. The parts baskets that
will hold the parts
in the bake oven that I had ordered came but were
unacceptable. I
may have some custom baskets fabricated if I can't
find any decent
ones "off the shelf" (anyone know of any suitable
SS pans, baskets
or trays please contact me). I will be visiting
the 40m lab tomorrow
to observe parts handling practices etc..
We plan to perform a third
test (final?) of the bake oven next week using calibrated
rga and with
the parts rack cleaned and installed.
RGA Analysis
Betsy Weaver
I was on vacation last week. This week, Kyle and I have
spent a some time measuring and calculating pump speeds,
and calibrating the RGA. Calibration has not been as straight
forward as we had thought, and we are still trying to iron out
the wrinkles. Today and a bit of yesterday, I have been
using the RGA data to calculate the flux of molecules through
a hypothetical volume, their dwell times, their transversal
time, and how much area they cover on an incident surface. I
will
continue to fine tune these calculations as our measurements
are improved due to calibration.
HAM 1st-Article Test:
---------------------
(C. Gray, H. Radkins)
Seismic Isolation components above the Support Table were removed from
HAM chamber and an alternative method of assembly was pursued.
Instead of initially building Isolation Stacks w/ spacers, each
stage was built with springs. This was done to center the Leg
Elements around the Safety Pins and to prevent any misalignment
caused by utilizing the truck jacks as before. This method of
assembly went well. It offers a better and safer way of installing
the springs. The Safety Pins were also centered in their respective
holes--except for one, but this can be remedied by improving hoisting
equipment.
Stan Whitcomb and Lee Cardenas arrived to offer assistance.
Went to March Metal Fab to inspect cleanliness and shipping of HAM &
BSC
Piers.
they are due to arrive next week.
Staging for 2k Installation continued. Piers and Crossbeams were
hoisted
over the beam tube for temporary storage.
Optics & Lasers:
----------------
(D. Cook)
Optics & Vacuum Prep Labs (Doug)
The University of Florida Group is here actually doing some real work
in
the Vacuum Prep and Assembly Lab. They are working on the small optic
suspensions. The electronic rack and computer is now in the Optics
Lab for
the optic suspension and balancing. The laminar flow benches, with
their
polypro sinks for the clean station are now in the Optics Lab. The
sheet
metal laser barrier/baffles are installed in the Optics lab. These
prevent
laser light from being deflected off of the ceilings to areas where
people
could be working without eye protection. They are designed, not to
restrict
the air flow.
Clean room garb and equipment is here. Other supplies and installation
is
on going.
Computing Systems:
------------------
(C. Patton)
Over the weekend, I put an additional 19" rack mount cabinet into the
Communicatins Room, as well as, a new storage cabinet and a table.
The
Tape robot, E3000 server, PBX controller, Ultra 10 mail server, ATM
controller, and all their peripherals have been rack mounted.
A User's
resource library is set-up in a bookshelf in the Comms. Room, with
documents for all our user application software, networking, and
hardware. I am starting to put together a collection of supplies
and
spares in the storage cabinet.
Weekly tape backups of the user accounts on the server are done every
weekend, usually on Friday evening and/or Saturday afternoon.
MATLAB has been installed on the server.
I have added 5 new user accounts and helped other staff with problems
getting their PCs working on the network. I helped set-up 2 Sun
workstations for CDS to use in suspension and Data Aqcuisition testing.
Beam-Tube Bake Out:
-------------------
(M. Lubinski, M. Guenther, K. Stiff and W. Althouse)
Weekly Report for week of 8/11/98
Electrical Support Services Contract:
Report from Sun River
Accomplishments:
The major accomplishment this week was the transport and placement of
the
last power supply trailer and the installation of A-1&A-3 45KV
transformers
on the Y-1 tube area. Testing of the power supply system on the
Y-2 tube
area went very well and the system performed as designed.
Problems/concerns:
No problems.concerns we encountered this week
Mski note: The Power supply testing was completed successfully(hopefully
we did not raise Otto's electric rate). Both power supplies were
run at
full load locally and then both power supplies were run together at
full
load using the PC and Cimplicity software from the Y2 end station.
Cryopumps:
Cryopumps are mounted on all ports. The Cryopumps are currently
on at
ports 2-1, 2-2, 2-3, 2-4, 2-6, 2-7, 2-8, 2-9. One of the Watlow
control
units for the cryopumps indicates an error code and was sent back to
CVI
for repair.
The Turbo pump is mounted at port 2-1 and is running, data from the
pump
from the Cold cathode gauge is being logged on our data system.
the Turbo
for port 2-9 is being mounted this week.
Data Acquisition and Temperature Control System:
Report from Mark Guenther:
An end-to-end bake test of the power supplies and Y-2 module was conducted
on 8/7/98. The Data Acquisition and Temperature Control System was
used to
monitor and log power supply and tube parameters during the test. The
System was also used to remotely command, to 4 specified current levels,
the output of both supplies simultaneously. The data bus performed
well at
all current levels. Thermocouples have been connected on the
mid station
termination anchor heater blankets, and the remainder of the port heater
blankets in the beam tube enclosure. All Cryopump temperature and run
signals in the beam tube enclosure have also been connected.
For additional information about this report, contact sanders@ligo.caltech.edu