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The LIGO Executive Committee
Agenda for Monday June 19, 2000 will be:
(Meeting time: 10:30 am Pacific Time)
Open meeting 10:30 - 11:30
Special Items: PUBLICATIONS POLICY
TNI mode cleaner locked successfully in vacuum.
No report this week.
WBS 1.2 LIGO Operations--Administration
From: Ed Chargois <chargois_e@ligo.caltech.edu>
No report.
From: Esther Cunningham <esther@ligo.caltech.edu>
Press here for ACCOUNTS PAYABLE HISTORY DATA.
From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
The issue of insurance coverage for tourists at the two LIGO sites has been raised, and is being investigated. The Caltech policy covers a certain number of tourists to campus and off-campus sites, but it is not known if that number is large enough to cover all of the LIGO tourists.
Irene Baldon
Worked on preparing the paper work for six new trips taken recently or upcoming (six Payment Requests and four Advance Requests). There are approximately an additional 11 new trips in various stages pending completion of travel arrangements before the paper work can be completed.
Our SURF Students have been arriving and have started to submit expenses for reimbursement. Riccardo DeSalvo had his students come in a week early to start working with him. And these students were housed off Campus using his account number.
Completed 31 Expense Reports, some of which were extensive, involving 2-3 or more pages each. There are 21 Expense Reports still to be done. I'm not holding any completed Expense Reports which require a check from the Traveler before sending to Travel Audit to clear at the present time.
Rita continues to try to fit some time for travel into her schedule. She has taken six Expense Reports to be done this past week and completed eight for final review.
I haven't heard anything on the progress of LIGO obtaining Travel P-Cards.
Prepared the Travel/Vacation Itinerary for the Week of June 12, 2000. Worked on several problem issues with Travel Audit.
Rita Torres
For I. Petrac investigated why several Attachments and reports did not appear on the MOU/LSC page, worked with B. Kratochwill to remedy this. Prepared FedEx to send MOU and Attachments to Stanford, and to CA State Dominguez Hills. Formatted report for GEO from their email submissions. Scanned several documents for web posting. Met with Irena and Barbara to discuss upcoming MOU and LSC activities. Also met with T. Frey et al. to discuss record-keeping for upcoming LSC work.
For P. Lindquist distributed material for upcoming CCB. Input pages to new Visitor Program (LIGO-M000184-00-M).
Last week Oracle would not accept certain Poetas. This week completed those now that the problem was fixed, most end dates have been corrected. Obtained several additional requisition numbers. Did site trip updates, the usual P-card activity. Did morning and afternoon mail for one day while C. Mak on vacation, arranged for three telecons on the same day, some travel documents.
Dorothy Lloyd
Processed requisitions, invoices and receiving on-line. For more detail see "Cost Schedule Control Systems" report by Esther Cunningham. Tracked and followed up on invoice problems. Monitored contract and blanket order funding levels and notified task managers when supplements were needed. Reviewed and recorded payments processed by Esther for the period of May 22 through June 9 on contract summary sheets and LIGO database. Continue to review "old" open purchase orders.
Jim was out again this week on Jury Duty.
Elizabeth K. Wood
Caught up on employment issues.
Worked on a visitors program revised budget.
Met with the Wilson House people who will be moving over to the second floor of West Bridge and talked about their furniture and facility needs.
Issued lots of keys. I will update the roster when I get a few minutes without the phone ringing.
Progress Period from 6.9 to 6.15
Accomplishments:
The following change requests have
been submitted:
| CR-990028 | WBS 1.1.3 | Beam Tube Enclosure Closeout | F. Asiri |
| CR-000005 | WBS 1.2.1 | Upgrade Pre-stabilized Laser | S. Whitcomb |
| CR-000006 | WBS 1.2.1 | Re-polish Core Optics Components | S. Whitcomb |
| CR-000007 | WBS 1.2.2 | Replacement of Optical Lever Lasers | S. Whitcomb |
| CR-000008 | WBS 1.1.4 | Cameras and Projection System at LIGO Livingston Observatory | F. Asiri |
| CR-000009 | WBS 1.1.4 | Cameras and Projection System at LIGO Hanford Observatory | F Asiri |
| CR-000010 | WBS 1.2.2 | Redesign Suspension Controllers | S. Whitcomb |
| CR-000011 | WBS 1.2.2 | VME Development System and Spares | S. Whitcomb |
| CR-000012 | WBS 1.2.2 | ASC/LSC Rework | S. Whitcomb |
Copies of these change requests have been distributed to memebers of the LIGO Change Control Board (See LIGO-M000176-00-P).
Press for the latest Contingency Needs Projection.
From: Kris Duncan <kris@ligo.caltech.edu>
No report this week.
No report received.
OPTICS: Failure of the RGA head on our bake oven has slowed the processing
of COS components. We've taken the head off of our new small oven (disabling
it) and the big oven is back on-line. CO installation has proceeded
very
smoothly this week. The MMT3 and Recycling Mirror have been installed
and
aligned. MMT-3's optical lever lost laser power and was replaced. Ken
Mason
has assembled the optical flat assembly and it will be installed today.
Installation of the IO baffle will occur late today, or tomorrow. We
also
expect to have the BS installed and aligned by week's end. (Jonathan
Kern)
PSL: We are replacing the mirror mounts and periscopes on the PSL table
with
new stiffer mounts. (Joe Kovalik)
Computers: We have received and are installing five new Gateway PCs
and two
new NEC PCs. These are both providing upgrades for staff
users and providing extra machines for summer visitors and SURF students.
(Tom Evans)
Weather Stations: All stations now have the appropriate PEM instruments
mounted and sending data to the CDS system. Since all collection software
and hardware is working properly, all CDS weather data is now being
collected. Weather stations still await appropriate
landscaping before instruments that require ground mounting can
be permanently installed. (Anthony Rizzi)
All activities covered elsewhere.
All activities covered elsewhere.
| Installation
& Commissioning:
Livingston |
Other Science/Engineering
Activities:
Issues/Concerns |
See also the Installation web page
4k preparations: The SOS towers for the 4K were baked; Dan has designed a new in-vac target for aligning the back reflected light from the RM; Dan is revising the PSL table layout for the 4k IO to minimize the kinematic mounts.
Joe Kovalik has installed several more of the improved optics mounts on the PSL.
The three flat test is complete. The temperature has undergone some shifts this week, but we are transitioning to a setup for measuring ETMs, so temperature has not negatively impacted the ETM delivery schedule.
Sander Liu
Global Diagnostic System - Helped Fred lay out the printed circuit
board.
This week we locked our mode cleaner under vacuum, with the polarization
in the final configuration and the finesse
at 5000. Acquisition was
prompt, and the lock was robust. We
now feel that we have enough
information to go on and install the test
cavities. Preliminary
calculations indicate that a lock-acquisition servo will be challenging
to
build but not impossible.
We were able to acquire lock
in our mode cleaner, with a finesse of 5000,
two different ways. We were able to simply lock directly, but
we were also
able to lock in the p-polarization state, with a finesse of 500, and
then
rotate the polarization to bring the finesse up to 5000 adiabatically.
Planning/strategic: DHS and MZ met with Joe Giaime to look over
preliminary LIGO II seismic isolation plan developed by him and Gerry
Stapfer. We asked about possibly accelerating HAM stack introduction
into LASTI (e.g., parallel fabrication of "lower design risk"
components concurrent with alpha-testing of HAM prototype). Schedule
pressure arises from SUS testing and optical characterization testing
which need the stacks in place early as infrastructure (in addition
to
the testing pressure from SEI itself). We are still working the
issue.
>> Lock Acquisition
Luca worked on the lock acquisition with angular degree of freedom.
He ran e2e in the recycled michelson configuration and one of the
sidebands locked, then I injected angular noise into the mirrors.
He used either max modal mode <=1 , max modal mode <=3 with/without
the cirvature mismatch calculation included. For one mirror having
0.1
microrad @ 10 Hz, either max modal mode =1 or max modal mode =3
yielded close results. (He is, however, a little puzzled by the DC
powers I observe).
He is ready to move to the complete LIGO configuration with Matt's
acquisition of lock scheme with angular degress of freedom turned
on.
>> Biplab visited LLO last week.
* At LLO, he gave a talk and demonstration of E2E
* He discussed with Ed daw and Anthony Rizzi about e2E.
He explained Matt+Luca's work on lock acquisition
>> Simulation general
* Biplab traced out bug that Luca was getting. Made a few
test runs
* Biplab is writing E2E paper.
* Biplab is working on noise curve generation from E2E, seismic,
thermal and shotnoise combined.
* Hiro completed the conversion of the code to use stl, which shows
speed gain of a few 10% to 100%.
* digital_filter module is rewritten to use the same code as CDS and
psiir.m by Peter Fritschel, which is based on SOS.
The wrapperAPI was successful in loading a shared object library that
was developed by the UWM team visiting this month. A couple of minor
"pointer" bugs showed up that are bound to happen when you ask C++
code to talk to C code but this has been sorted out and the code was
able to load the shared object, execute its functions and carryout
dynamic load balancing. This is a major success for the wrapperAPI
group. The next step is to finish the communications layer between
the mpiAPI and the wrapperAPI.
The controlMonitorAPI now has support for monitoring processes on
all computers within the LDAS system. It can continuously poll other
remote processes and will soon have the ability to source and isolate
individual processes.
Peter Shawhan and John Zweizig organized a meeting which was attended
by members of
LDAS, GDS and Hanford to discuss data access models for graphical and
higher level analysis packages, including a proposed pipeline analysis
environment. The major actions from the meeting were to develop a set
of conceptial designs outlining the roles of the common interface and
protocols for these analysis packages while borrow from the model used
in GUILD.
A threaded version of LDAS data communications functions was successfully
tested this week on the SUN platform. However, these threaded functions
were found not to work with the dlmalloc package that LDAS has been
using.
We are now looking into ways to enhance dlmalloc to work with threads
and
also to be able to support threads under Linux where dlmalloc is the
default memory management utility.
About 80% of the memory leaks that were in the frameAPI have been tracked
down and eliminated. They were found in the TCL layer and were associated
with copies of ilwd data pushed into containers. However, more work
is
needed to clean up the remaining 20% level of leaks.
Isaac Salzman, the new LDAS integration and system
tester showed up this week. He will
be working to standardize the testing paradigm
for the large set of code
now within LDAS.
----- Forwarded message from Omar Rashad (LDAS SysAdmin) -----
Integrated new KVM switch so new servers are accessible for (re)installation.
Cleaned up other wiring.
Finished patching ups control software to latch off upon extended power failure.
Reinstalled/upgraded DataConditioning server to Redhat 6.2.
----- End of forwarded message from Omar Rashad (LDAS SysAdmin) -----
For Larry,
8 Sun E450 servers have
been successfully ordered for LDAS under a
matching grant fund from Sun.
For Stuart,
Work on the LDAS procurement
plan and scheduling of future LDAS
installation, in particular, plan for development beowulf cluster at
Caltech, and the migration of LDAS networks from ATM to Gigabit Ethernet.
For Greg mendell (LHO):
1) Located the D1000 288 GB disk unit. It is located in
the mass
storage room.
2) Located dark fiber running from the ATM switch in the mass
storage
room to the user room.
3) Located the shelving for the beowulf cluster. It is in
the staging
building. Apparently not all the correct pieces are here.
Christine
Patton is taking care of this. She is on vacation this week.
Will
check with her on Monday to update progress on this.
4) Measured the mass storage room for the installation of the
beowulf
cluster. There are 308.5'' from the right side of LDAS
rack 1 to the
right wall (when facing the rack). But there are also two fire
suppression tanks on the right wall that are 18'' in diameter.
So we
need to allow clearance around
them. I sent Albert a diagram of the room.
5) Dave Barker says he will need a least a two week warning to
clear
out the CDS stuff to make room for beowulf. And there is
fire
suppression equipment running in the floor (I think) that we have to
find out about from the fire department before we can drill into the
floor to mount the shelves.
6) I received a copy of a spreadsheet from Otto showing the amperage
and HVAC needed for beowulf.
He says he needs the TOTAL BTU/hr for the room. Once he has this
he
will figure out what is needed to keep the room cool. He
says there is
plenty of power for the PC's. Dave Barker is working on the total
BTU's. I'll check with Dave, and make sure this is being taken
care of.
7) Otto says it will be no problem to build bracing from the shelves
to
the wall once the shelves are in place.
MIT:
Ordered a SUN D1000 disk system.
Livingston:
Received and installing five new Gateway PCs and two new NEC PCs.
These are both providing upgrades for staffusers and providing
extra machines for summer visitors andSURF students.
Hanford:
Nothing to Report
CIT:
Barbara continued working on the costbook web forms.
Installed TimeTarget on pherkab and set up backup job.
Met with colleagues about upcoming changes to LSC web forms and about
new
roster database.
Set up web pages on docuserv for General Computing. Even though the
pages
are under contstruction they will be put on-line Friday June 16th.
Created/installed web page for Livingston facilities as-built drawings
(279 drawings).
Developed a template for LSC MOU history web pages.
Caught up with web items received while on vacation, mostly LSC
changes.
Suresh made a full backup of cdssol9 (CDS daq control system) in order
to
upgrade to solaris 2.6 from 2.5.1.
Installed secured shell version 1 in documentation server, docuserv.
Set up couple of user accounts, mostly surf students.
Got help from HP technician to replace some parts out of LaserJet 5000
printer in third floor bridge.
Working with Larry on updating information on the computing web pages.
Lisa Bogue has been brought on-board to assist in the system
administration area for General Computing.
The large SUN equipment order for a number of workstations and lowend
servers is now being placed. The equipment should be shipped directly
to
each location.
ITS has changed the LIGO network connection on the CIT backbone from
the
Kellogg connection to Bridge with a redundant connection at Guggenheim.
Each of the computer projectors should now have a shipping box for it.
Caltech received theirs at the first of the week.
Orders have been placed for a number of PC's to accommodate the SURF
students and other visitors.
There now exists a couple of additional laptops that can be checked
out
for travel. Larry W. has the information on the units.
Stiff isolation system (S. Richman, J. Rollins, J. Giaime)
Jamie has completed a set of open-loop transfer function measurements
from forcers to various sensors on the upper stage, and they immediately
gave some insight on the low-frequency tilt seen in the horizontal loops.
By comparing the responses of the vertical sensors when driving with a
horizontal actuator, we could see that the induced tilt seems to be caused
by a spurious vertical force component from the actuator. The effect
is similar in all three horizontal actuators. Applying a 15% correction
with the nearly co-located vertical actuator reduces the tilt by more than
an order of magnitude at 0.1 Hz. This has allowed us for the first
time to close a horizontal loop using a broadband seismometer. The
seismometer signal is blended with that from the corresponding position
sensor at about 70 mHz.
From: Helena Armandula <ahelena@ligo.caltech.edu>
COC Coating Development - General Optics will coat 4 substrates to LIGO
specs.on a "best effort basis". Two substrates are fused silica and two
are sapphire (C and M axis).
Delivery date for the coated substrates from MLD is July 28th.
From: Phil Willems <willems@ligo.caltech.edu>
Fused silica fiber/ribbon research:
-----------------------------------
We have built and installed a suspension mount for violin mode Q tests.
The
upper mass is ready and the lower mass is on order. We are beginning
to set up
the optical sensor and will use it to test our electrostatic drive.
Ribbon research is progressing nicely and we are commencing uniformity
and
strength tests. (John Johnson, Phil Willems)
Geppo Cagnoli of the U. of Glasgow and Phill Willems are working on
final
calculations of nonlinear thermoelasticity and are preparing a paper
on the
effect.
Sapphire Q measurements:
------------------------
The quality factor of the large LIGO sapphire is now at least 1.8e8.
(Phil
Willems, John Johnson)
Silicate bonding:
-----------------
We have evidence that the crystals that form in silicate bonds are potassium
hydroxide, and Sheila Rowan at Stanford has found evidence that very
extensive
rinsing with DI water after cleaning prevents crystal growth.
We will verify
this at Caltech and also test to see if bonds without crystals are
different in
strength. We have finished the mount for the loaded bond experiment.
We are
also making several bonds with non-superpolished samples to see if
superpolishing is essential to bond strength. The
first of the Caltech bonds
was broken at 250 kg of shear to the delight
of all, especially Sheila, who
tested her first bond this week. (Helena
Armandula, Sheila Rowan, Phil Willems)
From: Riccardo DeSalvo <desalvo@ligo.caltech.edu>
We welcome James that just joined SAS
Akiteru
Preparing IP characterization
Found strange resonance on unloaded IP, need to understand
Chenyang
Starting characterizing TAMA LVDTs and actuators,
Made coiler counter,
Actuator report draft 2.
Hareem
Measured noise in Keithly DAQ boards
Measured more Df/DT curves at different f. Need to make more,
will
take time.
Alessandro
Accelerometer r/o circuitry into production
Studying geometries and metals for Vertical accelerometer.
Giancarlo
Finished optimization program to exactly design the profile of stress
uniformized blades.
Virginio
Introducing improvements (from Virgo) on LVDT r/o cards, expecting
x2-x5
improvement in resolution
Writing Elba paper
Soy
Coiled several LVDTs for creep measurement
Blade measurements
Lisa
Setting up temperature stabilisation and monitoring systems for the
creep hut
Tatsuo, Kenji
MGASFs tests:
Tuned 2 mm MGASF filter down from 0.6 to 210 mHz, measured F/h, F/load
curves, all OK, will tune to lower frequency before testing.
Load 65 Kg
1.5 mm MGASF filter initially at 450 mHz.
Proven that 30 Hz resonances of last week are ambiental, they
are not
excited anymore by hammering on the prototypes. First resonance
on F1
at 236 Hz.
Safety/reference structure around IP has its first resonance at 27
Hz
(without stiffeners!)
Transfer functions and temperature characterisations next week.
From: Eric Gustafson <gustaf@fastloki.Stanford.EDU>
Subject: Lasers and PSL minutes form June 1,
2000
Lasers and PSL Telecon Agenda
June 1, 2000
8:00-8:25 AM California Time - Phone in Number (650) 723-2393
Todd, Matthew, Gary, Peter King, Peter Fritschel, Jordan, Rick and
Jim Mason
5:00-5:25 PM California Time - Phone in Number (650) 723-2393
Chairman Jordan Camp
1. Progress on setting requirements - Jim Mason
Arm cavity mismatch determines both the coupling of the PSL frequency
and amplitude noise to the main signal. Calculation is largely done
and Matlab code is done. A document is in the works. Amplitude noise
requirement is near 10^(-9)/rt(Hz). 50 ppm difference in arm losses
more important than the input mirror transmittance. This requirement
is about the same as that set by the technical radiation pressure on the
core optics.
What about technical rad pressure in the mode cleaner?
2. Discussion of laser and PSL requirements - post MIT design summit - Peter Fritschel
Laser power did not change much - sapphire (180W/125W) silica (120W/80W). No sensing system selected yet but a possibility of a DC offset locking technique non sideband system or sidebands in the arms. DC readout technique and so we have easier to reach requirements at the RF frequency. Laser amplitude noise driven by technical radiation noise and this would be the same in any system. Stabilize beam to 30 milliamps then at 10 Hertz we are near the requirements. 3x10^(-9) at 30 Hz. Might set amplitude actuator requirements.
For now we should continue to pursue the high frequency sideband noise calculations.
3. Status of the letters of intent and outside vendors - Gary
and Jordan
Deadline passes yesterday. TRW, LZH and Lightwave have expressed
interest. Fiber Tek may be interested in the amplifier only, Continuum
is a maybe we need to send a letter to Positive Light (Byer thinks no).
LZH Hannover may want to do everything. There are several different strategies depending on who is selected.
Q_Peak - Responded but Not interested
Coherent Technology - Responded but Not interested
Coherent Inc. - No response - Irena is on them
Schwartz - No response - Irena is on them
Spectra Physics - ?
Positive Light - No letter sent yet - Eric to get address to Irena
Vendors have expressed a concern about a level playing field. Jesper has not been in communication with TRW and Gary suggested that it would be a good idea for him to help them to understand LIGO's problems since both Lightwave and LZH are already up to speed.
4. Progress on the PSL conceptual design document - Rick
for now we have a LIGO 10 watt laser producing 20 watte and a laser
premode cleaner andn two amplifier stages to 70 watts and then 180 watts
and followed by a pre mode cleaner circ power about the same as LIGO I.
New draft out in a few weeks.
5. Progress on the 100 Watt amplifier - Todd, Shally
and Karsten (AM)
Peter and Jesper (PM)
The approach is 10 watt LIGO laser and 2 zig gag amplifiers up to 100
watts. Testing now as an oscillator at 100 watts. Testing the
diodes (700 watts) for the second amplifier should be done by the end of
this month. This leaves July and August to couple the beams through
a pair of the 3:1 slabe to reach to 100 watts. (30 watts for the
first stage and 100 watts after the second). Slabs are Brewster slabs
for the summer and switch to the coated normal incidence next fall.
Jespers group has completed diode testing and operating a medium power slab system. They are on track for operating the high power injection locked system by the end of the summer.
6. Noise clipper - Matthew
Lightwave noise clipper pump and signal resonant OPO gave 20 db noise
suppression from 1 Hz to 70 MHz. Equipment will be transferred to
Stanford. Working on understanding classical and quantum theory which
will need to be extended because we will see pump depletion and estimating
the ultimate performance. Talked to Arbore and the discussions are
becoming more concrete no equipment transferred. Then will be optimizing
the design theoretically. The first experiments will be to reproduce
the Lightwave result.
7. Upcoming Deadlines - Gary Sanders
We have a month to set up appointments with the Laser vendors.
Gary, Jordan and Eric will visit Lightwwave, TRW and LZH.
Conceptual PSL document around the time of the LSC meeting so need to circulate the document about august 1, 2000. August 15-17 LSC meeting.
Proposal must be out by November 2000. Gary wrote outline and will get in touch with people about the writing. PSL people not yet approached but will be soon. Jordan and Rick will write the section and cost by Peter King and Rich Abbott. On a web based tool!
8. Open discussions
We ran out of time.
For additional information about this report, contact sanders@ligo.caltech.edu