Weekly Report for Week Ending April 11, 2002

The LIGO Executive Committee Agenda for Monday  April 15, 2002 will be:

 (Meeting time: 10:30 am Pacific Time)

Open meeting 10:30 - 11:30

1. Announcements
2. LSC Issues (Weiss)
3. Comments on Weekly Report
4. WBS 1 LIGO I Construction (Lindquist)
• Field Change Orders/Contingency Liens/Change Requests
5. WBS 2 LIGO Lab Operations
• Administration (Lindquist)
• Sites (Raab, Coles, Shoemaker, Sanders)
• Detector (Whitcomb, Coyne)
• Campus Research Facilities (Weinstein (40 Meter), Libbrecht (TNI), Zucker(LASTI))
• Data Analysis and Computing (Lazzarini)
6. WBS 3 and 4  Advanced R&D and LIGO II (Sanders)

Special Items:

Special Announcements:

Weekly Report Highlights
 

LSC Issues (Weiss)

no report

LIGO I Construction/LIGO Laboratory Administration (Lindquist)

LIGO Operations--Administration

There was no Site Teleconference was held on Thursday, April 11, 2002.

The list of current actions revised to reflect the status of open actions assigned through March 28, 2001 may be found at ACTION LIST.

From: Ed Chargois <chargois_e@ligo.caltech.edu>

• No report this week.

>From: Linda Turner - turner@ligo.caltech.edu>

Web pages for the DCC give simple how-to's for document numbering, easy access to the latest on-line documents, and search capabilities for the DCC database. Take a look. . .

ACCOMPLISHMENTS

• Processed a few LSC presentations that straggled in.
• Met with Dave and Ryan regarding progress on the press kit.
• Met with Gary and Dennis to review some vendor options and work processes as it pertains to engineering documentation.
• Secured a government price on a Canon CD-4050 scanning workstation.  A demonstration has been scheduled for Thursday, next week.
• Helped in the collection of proposals, papers, and presentations pertaining to LIGO's Outreach program at the sites.

ACTIVITY

• Processing of LSC documents continued.  The end seems near.....
• Progress continues on conversion of old charge account files to electronic form.
• Electronic document submissions continue on a steady flow....

 

04/11/02	Packages	Faxes
In	31	34
Out	11	27

From: Esther Cunningham <esther@ligo.caltech.edu>

Press here for ACCOUNTS PAYABLE HISTORY DATA .

From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>

• Completed change order #3 to Air Liquide which added funds for FY2002, change order #1 to Chervenell which decreased the contract by $66,194.00,

change order #15 to Wave Precision which added funds for machining and polishing, change order #9 to Crystal Systems which added $19,092 for two
hemlite sapphires, change order 4 to MLD which adds $28,340.00 for coating of LIGO fused silica substrates.
• Am working with Dorothy on closing out open FY2001 PO's under her direction, and closing out and reducing contracts as requested.

• Assisted with preparation of items requested for DCAA audit.
• Completed and posted the monthly reports for Operations, Construction and R&D on the network.
• Started reconciling Oracle data in Fixed Asset accounts with LIGO's Fixed Asset data base.

 
• Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport

From: irena@ligo.caltech.edu (Irena Petrac)

• HYTEC: CO No.22, adding two complete sets of HAM fine actuation systems, was released to Purchasing. An advance copy was forwarded to HYTEC. Work is under way.
• CSI: CO No. 09, for two Hamlite sapphire substrates, was released to Purchasing. An advance copy was forwarded to CSI.  Non-disclosure Agreement, covering sapphire growth technology that CSI considers proprietary, was amended to included more formalized controls for data exchange.
• Wave Precision: CO No. 15, for polishing of LIGO supplied substrates (for CREEP experiment) was released to Purchasing. Work is under way.
• MLD: CO No. 04, for R&D coating of fused silica samples, was released to Purchasing. An advance copy was forwarded to MLD.
• Frequency Devices: CO No. 01, incorporating the Prec-contract Cost Authorization for VME DAC module development, and adding full-up design effort, was released to Purchasing. Work is under way..

CONSTRUCTION:

The Louisiana State Fire Marshal has accepted part of our appeal regarding handicapped access to the men's restroom adjacent to the auditorium in the Livingston Staging Building, but has denied the other part.  We will not have to change the commode partitions, but will have to re-arrange the urinals to provide greater handicapped access.  The revised drawings to cover this change were transmitted to Brunt Construction on Tuesday and they will prepare an estimate for this effort.  Additionally, the Fire Marshal requested a concrete pad at the receiving dock and an extra sidewalk around the side of the building.  Brunt has received change orders to acomplish this work.  The new building completion date is April 30, and they are on track to make that.

Chervenell Construction is re-working their schedule to try and compensate for the late delivery of materials on the Hanford OSB East Building.

OPERATIONS:

Both sites are preparing to support the first science run, now scheduled for June 29 through July 15.

SUPPORT (Baldon, Torres, Lloyd, Tischler)

• Processed the paper work for thirteen (13) new/revised trip.  I have twelve (12) trips in various stages of completion before ticketing can be done and paper work completed.
• Completed eleven (11) Expense Reports and there are twelve (12) reports yet to be done.
• Reconciled fifty-two (52) P-Card items which require extensive telephoning to vendors in order to track down which traveler incurred which charge.
• Worked with Montrose Travel to correct two (2) trips which were completed before the recent turnover.  One (1) trip was canceled and had to be reinstated and the other was ticketed using a Foreign Carrier and had to be reissued using an American Carrier.
• Started working on the LIGO/REU/SURF Program with Dr. Libbrecht.  There will be thrity-eight (38) students working with LIGO either at Caltech (24), Hanford( 5), Livingston (5), or VIRGO, Pisa, Italy (4).  Sent out initial requests for travel dates of each student and have already received some replies.
• Worked on the preparation and distribution of the Travel/Vacation Itinerary for April 8, 2002.  Performed normal recording and filing associated with Travel and Reimbursement.  Also performed miscellaneous duties as requested by various members of  the LIGO Project here at Caltech as well as from members of the staffs of each of the two (2) sites.
• I continue to do MIT's travel to the sites for installation activities and also to assist them wherever possible.

• Nothing significant to report.

• Formatted documents from GEO, U of FL, IAP, and Carleton College.  Submitted these to DCC out.  Scanned two new documents from TAMA, and placed these into the DCC;  updated the LSC roster with their Attachment Z.
• Posted on the small web page for review documents from Carleton College and Univ. of FL.
• Arranging with Lase-R Shield to obtain eye wear replacement shields, these come off of the frames and reduce protection on the side of the eye wear.  Should complete the purchase this week.
• Returned to the telephone office pagers not in use; this will save some money.  Arranged telecons for the Core Optics group, and also canceled two other telecons.
• Followed up on delayed orders from Mech-Tronics and Dion & Sons.  Obtained tracking numbers to follow progress toward CIT.  Also followed up with CVI, obtained an RMA number to return an order.
• Updated site trips.  Placed Pcard orders, chased invoices to reconcile several this week.

• Thanks to Rita for instructions on how two scan documents.
• Met/assisted visitors from Keck Observatory in Hawaii.
• Press Kit meeting with Linda for presenting to Gary on Monday.
• Cinco de Mayo meeting with Linda for event plans....more details to LIGO group soon.
• Website development meeting with Veronica re: Press Kit.
• Gathering information/quotes for photos in upcoming brochure project.
• Gathering all templates to implement a consistent look and make available on the LIGO website--this in conjunction with GoF.
• Assigned DCC#s to articles used in clipping service--in conjunction with Press Kit project.

Advanced LIGO (Frey)

Progress Period from 04.05 to 04.11

Accomplishments:

• Weekly Advanced LIGO Project Controls meeting was not held this week.  Next meeting date has not been scheduled.
• Advanced LIGO MRE Proposal (Highest Priority)
• Continuing the development of the Cost Estimate.
• Continue to pursue all other sub system schedules.  Reviewing all subsystem schedules and incorporating new target dates per DCC Doc. No. LIGO-M020121-A by Dennis Coyne.
• Updated web site with latest data.
• The following is a summary of status by sub system:
• COC - Work on action items per second review continues.  Next meeting date has not been scheduled.
• PSL - Finished inputting changes to the cost book and schedule.  Next meeting date has not been scheduled.
• AOS - Work on action items continues.  Inputting / reviewing data provided by David S.  Next meeting date has not been scheduled.
• IO -  Work on action items continues.  Next meeting date has not been scheduled.
• SUS - Working with SUS group to incorporate current comments.  Janeen is still executing the update and has committed to provide progress data through 4.12.  Executing outstanding action items and preparing revised meeting minutes.
• SEI - Work on action items continues.  Next meeting date has not been scheduled.
• ISC - Continue to review data.
• All other subsystems have yet to be scheduled for their first review.  These dates are pending per direction from Gary Sanders and Dennis Coyne.
• Continue to update the TNI Schedule and incorporate any changes.
• Nothing new to report.
• Continue to update the LASTI Schedule and incorporate any changes.
• Nothing new to report.
• Project Plan for the 40-Meter Lab Upgrade continues.
• Nothing new to report.
• Cost Book Tool.
• ROSTER DATABASE:
• Continue work on my action items providing BK with needed data.
• COST BOOK DATABASE:
• Online help is current with most recent system changes.  Procedure is being reviewed for changes.
• DCAA - Work continues on the incurred cost audit.
• Prepared / revised 2 transmittals.
• Development of the Advanced LIGO Project Controls Guidebook continues.
• Project Web Site for posting schedule and progress related data continues to be updated with the latest and greatest.
• See http://www.ligo.caltech.edu/~tfrey/index.html

• Next weekly Advanced LIGO Project Controls meeting to be scheduled.
• Advanced LIGO MRE Proposal (Highest Priority Task)
• Highest priority is the development of the Cost Estimate.
• Will continue to pursue all other sub system schedules.
• PSL - Will complete estimate and schedule changes.
• AOS - Continue inputting changes to and prepare for next meeting TBD. (New data from David to be input).
• IO - Continue inputting changes to and prepare for next meeting TBD.
• SUS - Continue inputting changes to and prepare for next meeting TBD.
• Will update the plan with progress as of 03.29.02 and  post to site by the 5th.
• SEI - Continue inputting changes and prepare for next meeting TBD.
• COC - Work on action items by Garilynn continues.  Anticipate schedule changes prior to next meeting TBD.
• ISC - Finish review of data.  Input data and change WBS as requested.
• Will issue updated meeting minutes for every subsystem as action items from most recent review are completed.
• Will Continue to update the TNI Schedule and incorporate any changes.
• Will update the plan with progress as of 04.12.02 and  post to site by the 18th.
• Will Continue to update the LASTI Schedule and incorporate any changes.
• Will update the plan with progress as of 04.12.02 and  post to site by the 18th.
• Will continue updating the 40 meter schedule and incorporate any changes.
• Will update the plan with progress as of 04.12.02 and  post to site by the 18th.
• Roster Database
• Will continue to work with BK and executing action items.
Cost Book Tool development continues.  (Highest Priority Task)
• Mapping and formatting of OPS cost data for input will now continue with co-operative agreement approved.
• Will continue to work with BK executing action items.
• Will continue to provide support to PL for DCAA audit(s).
• Will continue the development of the Advanced LIGO Project Web Site.
• Will continue the development of the Advanced LIGO Project Controls Guide Book.

I have still assembling a quarterly report for the Construction effort (end of February).  The goal remains to prepare a short report comparable to the old Monthly Reports without bothering the task managers.

The following change requests have been submitted:
 

Press for the latest Contingency Needs Projection.

From: Cindy Akutagawa <cindy@ligo.caltech.edu>

• Various personnel/payroll /HR related work.

Quality/Safety (Tyler)

No report this week.
 

LIGO Hanford Observatory (LHO) Operations (Raab)

-------------------
FACILITIES
-------------------
There really is a new building coming up at the LIGO Hanford Observatory.
The picture shows the front entry in the making.

LIGO Livingston Observatory (LLO) Operations (Coles)

Interferometer: The mode cleaner wavefront sensors were checked and then calibrated. The wavefront sensors were then activated and they are now fully operational. The beam on ISCT4 (anti-symmetric port) was found to be elliptical and astigmatic. The culprit was a lens on the galilean telescope after the periscope for the anti-symmetric beam. The telescope was improved using a barrel lens mount. The beam was the adjusted to be collimated and not astigmatic. It was also found that the beam and the wave front sensor response look the same regardless of the EO shutter transmission level.  (Joe Kovalik)
 

CDS: Rusyl and I replaced the clock Driver boards. Got new firmware from the VPN box manufacturer this week. Installed it and fixed the broken VPN box. Fixed problems with the ASC freeze up couple of nights ago. Working on getting the disk to disk backup straightened out. Experiencing problems with disk getting full. Found a bug in the Mode Cleaner Auto Locker script. Added some buttons to reset the purple buttons on the LOS screens and the OPTLEV screens. Also added the epics records for the purple buttons in the saverestore.exclude list. Fixed a security bug on london found in ssh by Dave Barker.
(Chethan, Rusyl)

LDAS: Visited Caltech: made a presentation about DB2 features which we will be using soon (replication, federated system), talked to Kent, Stuart, Peter, Ed and Mary about how to proceed setting up replication for LDAS metadatabase and what experiments are needed to figure out the optimal configuration. (Igor)
 

Detector/Technical Support (Whitcomb, Coyne)

40 Meter Interferometer (Weinstein)

• Great progress towards a 13 meter suspended mass mode cleaner at the 40m!
• Betsy Bland and Helena Armandula completed the preparations for three SOS suspensions for our input mode cleaner, with support from Janeen Romie, Bob Taylor, Steve Vass, and Dennis Ugolini.
• Steve vented the 40m vacuum envelope on Tuesday afternoon, and all three suspended optics were installed in the 40m vacuum envelope on Wednesday.
• Ben Abbott delivered three satellite suspension amplifiers, and he and Bob Taylor ran cables to the digital suspension control rack.
• All 3x5 OSEMs have been plugged in, in the right order, and are working.
• We only have one stand-alone suspension controller, with non-adjustable gain (a bit too high), but we can damp each optic (at some level), one at a time.
• Mike Smith prepared some temporary in-vacuum mirrors to guide the beam into and out of the mode cleaner. Still waiting on permanent in-vacuum mirror mounts from DLS.
• Mike Smith, Dennis, and Steve laid out the IOO train from the PSL PMC through the pockels cell, mode matching lenses, new periscope, and 2 PZT steering mirrors.
• The beam has now been steered from the periscope, into the vacuum chamber, through MC1, and onto MC3. We're trying to get it all around the 13m triangle and out of the vacuum chamber.
• Ben and Bob continue to wire up the suspension controller rack, with the mode cleaner controls rack to follow.
• We will test the digital suspension controller slow controls as soon as the rack wiring is done.
• Rolf and Jay continue to work on the front end software, piggy-backing on the LHO4K digital suspension front end software effort. The estimate is that it is still a couple of weeks away, making it the critical path effort.
• We will most likely pump down before the digital suspension controllers are in place, then vent again in a couple of weeks (hopefully!) when all the final equipment is in place.
• Betsy is heading back today. MANY THANKS TO BETSY FOR ALL HER HELP! We will want her back in the fall to help us prepare the remaining 7 optics.
• Suspension Controllers & other CDS (Ben Abbott):
• I have finished and delivered two more satellite boxes to Betsy completing the three necessary for the mode cleaner optics.
• The ISS DC photodiode design has changed one last(?) time, to include a new differential driver, and new connector choice to better interface with Flavio's board. The pcb file should go to the board house sometime in the next day or two.
• I have run cables for the mode cleaner suspension controls back to the rack to be controlled from there by Hanford's stand-alone controller.
• I continue working on the photodiodes that will be needed for the mode cleaner suspensions.
• Bob has the 1Y5 cross connect finished and installed. we will begin the cabling to the modules tomorrow.
• Optical Layout (Smith):
• IO PERISCOPE: An Algor FEA analysis of the periscope structure pinned to a rigid table at the provided mounting slots showed a lowest resonance at 450 Hz; pinning the front and back sides of the mounting plate increased the first resonance to 950 Hz. An actual frequency spectrum will be measured on the PSL table, sometime in the future. The periscope was installed on the PSL table and aligned.
• MODE CLEANER OPTICAL TRAIN: The IO optical train was aligned from the PSL EO sideband modulator, through the mode matching lenses, through the IO periscope, and onto the turning mirror inside the vacuum chamber, awaiting steering into the input mode cleaner. Temporary mirrors mounted inside the vacuum for directing the IMC_R and IMC_T beams out through the output chamber viewport are awaiting alignment.
• IO Diagnostics, IMC_R and IMC_T: The optical components for the IO diagnostics, IMC_T and IMC_R optical trains are in process of being assembled.
• IN-VACUUM ELEMENTS: All the IMC commissioning in-vacuum components were received except for the Dynamic Light 2in mirror mounts, which are due to be delivered by 4/15.
• Optics (Billingsley, Armandula):
• Garilynn has prepared a new set of specs for polishing of the 5" test masses by CSIRO.
• Three PRMs, two SRMs, and two BSs have been polished by CSIRO and are ready to ship to us.
• Hope to get the 3 ITMs and 3 ETMs in a few weeks.
• Hope to send them to REO for coating, then back by mid-summer.
• PSL (Ugolini, Vass, Abbott B., Abbott R.,): the PSL, and its two servos, have been performing stably throughout the commissioning of the IOO path to the mode cleaner. Still need to fully optimize and re-characterize the mode matching, FSS, and PMC servos (noise spectra, transfer functions), since this most recent re-build. PSL diognostic optical train remains to be laid out and commissioned.
• Facilities and vacuum envelope (Vass):
• Larry has optical table enclosures, and beam tubes, in process in the Caltech shop.
• The 3-port door to the Output Optic Chamber is now on, with its special o-ring adapter.
• Steve pumped down the 40m vacuum from 4/3 through 4/9/02, with different combinations of the maglev, cryopump, and ion pumps. There was a peak at AMU 30 associated with the ion pump operation; it looks to be NO. It's around 10% of the O2 peak, Rai says that's ok so we won't worry about it.
• South Annex Bake Ovens (Taylor, Cardenas):
• Bake oven # E, the new oven, as well as The old oven # D, big chamber are in standby and ready to be used.
• Bake oven # B & C small chambers were used over the past weekend to vacuum bake the three MC optics, and their associated OSEMs, respectively. They are under vacuum and heat to get them as clean as possible and ready for the next load.
• Bake oven # C is baking (7) stainless steel bars 2"Wx 3/16" thick x 12" L These are the bars that will go into the contamination cavity with the samples to be tested.
• The new bake oven # F is in process of being built.

Thermal Noise Interferometer (Libbrecht)

no report

LASTI (Zucker)

LASTI (MacInnis, Mason, Mittleman, Ottaway, Rollins, Shoemaker, Zucker)
=======================================================================

Vacuum envelope:

Took RGA baseline and backfilled 4/4 to begin second round of stack
impedance characterization. RGA showed trace hydrocarbon signature, possibly
been due to extended Cambridge air exposure in first testing round.
Setting
up monitor to watch suspect molecular weights in subsequent pumpdowns to
distinguish diffusion vs. desorption time dependencies.

Myron is investigating compressed air cleaner/drier systems to reduce
our
dependence on bottled N2 seal gas for the pumps and possibly to provide
minimal clean purge capability.  Also ordered
a new bootscrubber (prior borrowed unit was recalled by owners).

BSC stack sharacterization for EPI design (Rich, Myron):

In the last week
and a  half we vented LASTI, opened up the BSC and
reinstrumented the stack internally with 4 Hz IDE geophones and
Wilcoxon 731A accelerometers.  We also added two new external sensors (L22-D
geophones, 2Hz) so we can now measure all 6 degrees of freedom on the
support structure.  We've taken 4 over night data runs; the ground noise
is much quieter, usually allowing us to run with high sensor gain.
Plan to complete these measurements and then repeat with the external
shakers oriented horizontally to probe translation and yaw.

External Pre-Isolator Design (Ken):

The welded support structure and the majority of machined parts have
been ordered for the hydraulic pre-isolator. The final quote for the
large machined foot is due today. The lead time for this part is 5-6
weeks.

Improvements have been made to the electro magnetic isolator to improve
cooling, reduce the overall mass of the actuator, and improved
positioning of the geophones. The welded support structure has been
ordered and the large machined foot final quote is due today.
Fabrication drawings for the mounts and actuator parts need to be
completed.

A fixture is currently being designed which will hold the crossbeam
during installation and provide  +/- 5mm course positioning of the
seismic load.

External Pre-Isolator EM Actuator Option (MZ for DHS):

Tested force constant and magnetic crosstalk from BEI magnetic forcer
to L4C geophone as a function of
geometry. Setting up to measure induced thermal gradients next.

PSL (Jamie and Dave):

Work continues to attempt to understand why our new FSS board does not
meet the performance expected due to its high electrical bandwidth. A
different alignment strategy actually worsened the performance. We have
ordered a new broadband EOM to determine whether the EOM is the limiting
factor. Preliminary modelling of the system using simulink has not
revealed any glaring errors.

Data Analysis and Computing (Lazzarini)

-----------------------
E2E MODELING (Biplab)
-----------------------

E2E Physics meeting
------------------------
In Wednesday's Physics meeting, Bill Kells gave a talk on some aspects of the
sideband imbalance problem and we had a long discussion on application and
limitation of modal model.

LIGO I simulation system
--------------------------
(Matt) Debugged seismic/stack model, final validation is underway. I also began
 work on testing the LSC system in anticipation of locking the IFO.

(Biplab) Did validation tests for seismic/stack model.

DAC noise model (Hiro, Matt)
----------------------------
The modeling of a DAC noise was completed. This is based on the following assumption.
When the digital value is changed, each bit takes some time to flip, and the observed
analog value is the weighted average of all intermediate values. E.g., when the value
changes from -1 to 0, there is an intermediate state 01111111, i.e., only the sign bit
is flipped, and this is a huge number. For 16 bit system, even the average time of the
bit flipping is O(1 nano seconds), this can introduce a noise of the order of 10 when
the sign of the value changes. The glitch when the sign changes is roughly proportional
to (bit flip time) / (measurement time) * 2^(number of bits).
We are going to validate this model by comparing the prediction with real measurements.

Code development and maintenance
---------------------------------
(Biplab) Validation of recent guoy-phase and mismatch related changes in code.

Alfi
----
(Melody)
 - Fixed more PRs for alfi5.  Currently working on resolving more popup menu
   issues and enhancing the settings value editor.

(Ed Maros)
 Continued to work on Makefile.am files for JAlfi

---------------------------
Hardware Systems (Anderson)
---------------------------

Caltech
-------
(Dan Kozak)

* Continued HPSS migration from Redwoods/3590s to 9940s.

* More HPSS user directory reconfiguration and account maintenance.

* Helped Greg Mendell at Hanford with Qlogic HBA firmware, T3 pSOS
  upgrades and FC switch firmware upgrades.

* Finally swapped out flaky Sun Ultra 10 for a spare LIGO Ultra 10.
  Still working to get StorageTek to make good on replacing the machine.

* LIGO SAN testbed:

        SAM-QFS still not working, but substantial progress made
        towards identifying the problem (it's not ACSLS but the SAM
        device tree).  Working with Lance at LSC/Sun to resolve the
        issue.

(Al Wilson)

* Trying to get tripwire working on a Solaris box. The web site has code for
  Linux. But no open source for Solaris. Still searching.

* Prepped rack in the test system for future T3's moved T3's into the rack
  for the CIT system

* Setup and installed Big Brother (BB) on the ldas-lho systems.
  Gathering files for remote administration of BB

(Stuart Anderson)

* Upgraded the CIT, TEST, and DEV LDAS systems to use openssh-3.1p1 for
  security reasons.

* Thinking about network topology issues to support inter-site database
  communication for advanced LDAS configurations.

* Installed additional UPS in LDAS-CIT system.

* Ordered initial datacon server for LDAS-CIT system.

MIT
---
(Keith Bayer)

* Finished reading E7 data back from tape.

* Trouble-shot Foundry switch problems.

* Investigated firewire to Linux for large cheap data repository
  for ldas-pcdev1.mit.edu (user request).

* Installed 100BT card on DMT machine (eventually to hook up to SF880)

Livingston
----------
(Igor Yakushin)

* Visited Caltech: made a presentation about DB2 features which we
  will be using soon (replication, federated system), talked to Kent,
  Stuart, Peter, Ed and Mary about how to proceed setting up replication
  for LDAS metadatabase and what experiments are needed to figure out the
  optimal configuration.

Hanford
-------
(Greg Mendell)

* Patched and updated firmware on the T3s, fiber channels switches,
  and fiber channel HBAs on the LHO LDAS network.  Coordinated with Dave
  Barker to simultaneously update fiber channel HBA firmware on the fb3
  framebuilder.  No updates were made to fb0 or the T3s that it uses.

* Worked with Igor and Julien to get a reduced data set onto tape and
  sent to MIT.  This is still in progress.

-------------------------------------
LDAS software development (Blackburn)
-------------------------------------

A significant effort has gone into testing LDAS this week. The code base
is still developing as we are feverishly adding the final features from
the target list of to-dos. Testing has revealed that database functionality
and the internal data format transmission through sockets are working as
expected. The ability to handle frames is working for time domain data that
is stored in the frames. There are still some issues with handling frequency
series data stored in frames which was discovered during testing. Testing has
also revealed a problem with collecting data objects for a single job at
the dataConditionAPI. This bug results in a "bad symbol" error and was
last calculated to occur in 3-5% of the jobs. Another problem with the
pre-release system was just discovered today. The nightly test script that
sends through a dataPipeline search job ever 30 seconds triggered a failure
mode at around 11PM for which all subsequent jobs failed to start up on
the Beowulf. We are not sure why the suddenly started to fail but we are
looking into it. LATE NOTE: This was do to a new objectSpace library being
pushed on the system by rsync last night.

We have begun some integrity testing of reduced data algorithms including
downsampling in the frame API. Need to verify that the data in the reduced
frames is correct and that all the channels required by the LSC can be
handled.

Added a "getResampleDelay" action to the dataConditionAPI to be used in
concert with shift() as demonstrated below in the example:

    y = resample(x, p, q, z);
    offset = getResampleDelay(z);
    yy = shift(y, offset, order);

This gives back a time-series yy starting at the same time as the original
x.
The interpolation() action was also renamed to shift() to better represent
its purpose. This shift() action has new tests at the unit and API level.
The resample() action has new unit tests which are performed during the
LDAS build. The final bit of redundant code has now been moved from the
dataConditionAPI subdirectory into the filters library subdirectory. Also
the windows class now has a new UDT wrapper.

The proper handling of detector geometry data stored in the frames has
now been fully tested and confirmed to work form input to output in all
dataPipeline jobs.

GUILD has been revised to handle the new frame cache index format in
the development version of LDAS, and to improve the utility which
watches the jobs running on an LDAS system.

The new diskCacheAPI is now working per its design requirements. This
is the first phase in a 3 part design of the diskCacheAPI so future
changes will occur starting with a migration to C++ cache trees and
the use of binary objects to store cache information. To date all
LDAS commands tested have worked with the new diskCacheAPI. This is
a significant step forward in our preparation for the next release.

Fine tuning and minor tweeks have occurred in all APIs this week as
we work towards increasing the robustness of this release. I suspect
that we will be able to have a similar success rate as with the E7
release but probably not much better...There has been a 10% growth
in the LDAS code base since the E7 release.

We held an internal database workshop this week here at Caltech for
LDAS to learn about and discuss the technologies available to use
through IBMs DB2 database software. Central topics covered were
database backups and recoveries, database replication, and database
federation. Igor will begin to prototype a model that will eventually
combine all of these aspects for LDAS and LIGO to use in its next step
up toward database management for the collaboration.

---------------------------
General Computing (Wallace)
---------------------------

MIT:
(Keith)
-Ordered more IP addresses from MIT for LIGO use.
-Ordered new low-cost printer for 11x17 prints
-Added 2nd graphics card to conf room pc (connect to projector)
-Fixed problem w/ VRVS software running on W2K
-Rebuilding old mailserver machine

Livingston:
(Shannon)
-Received the FORE equipment from Caltech.
-Still doing some recovery work from the LSC meeting.
-Working on resolving some network issues.
-Installed Norton Anti virus management console.

Hanford:
(Christine)
- Out sick most of this week.
- Finishing up with new PCs.
- Put a new battery in a laptop.
- Created a new user account, provide user support and CDS support.

(Larry)
-Working with Christine and Richard on getting more bandwidth to the WAN. The
connection using NoaNet appears to be a positive direction to go. PNNL has made
the switch to NoaNet and appears to be happy with the change.
We have a number of logistical issues to work out and will be getting LIGO
management involved in the next few weeks to help resolve a few issues but as of
now things are looking pretty good.

CIT:
(Mike)
-Finish putting together the backup Ghost Server and swapped out the old
one; this is now up and running.
-Loaded a new Laptop with special Engineering software for Janeen and Calum.
-Loading a PC to upgrade a user who is scheduled for an upgrade. On
this computer I had to add and replace hardware in order to get this PC
running correctly.
-Loaded Matlab for Norna R.; this installation took some time for the first two
installations did not work and had to completely uninstall and clear out
the registry and delete the Matlab directory in order to get this software
installed. This is now installed and seems to be running correctly.
-A Printer 4500, was having problems with paper jams; I did everything I could
but had no luck and had to call a tech to correct this problem. This turned
out to be one of the rollers were out of line from where the transfer kit
is located.
-Lisa has the PHP webserver up and running and has asked me to update all PC
information. I have been going around getting an updated list for all PC's that
includes IP numbers and MAC addresses, property tags and to whom they are
assigned; this is going to take sometime, I have started this and will continue
to update list as I work on the different PC's.
-Due to the limited amount of disk space I added an additional hard disk to
this server.

(Lisa)
- Finished up monthly backups
- Helped Larry put in a temporary kvm switch in the server room
- Setup a mailman mailing list "commissioning" for David shoemaker
- Working on a problem with the vacation program on the mail server.  It had 2
issues: 1) the new version of sendmail requires an /etc/shells entry and 2) the
new version of sendmail uses Berkeley DB with the vacation program.  This
portion of it is not yet fixed.
- Did some work on a prototype of a web-based inventory system for general
computing.
- Deleted and reinstalled the development environment on vega.
- Worked with Gary and ITS to get the ligo.org domain name properly hosted.
- Working on Cadence licensing issues with ITS.

(Veronica)
- LIGO website: the LSC transparencies keep coming in. I am posting them
as they arrive.
-Most time was spent on writing and testing various layouts of the new LIGO
Science Links webpage. Made several versions with different navigation
layouts to see which one is easier to use.
-Posted updates to the LIGO website (Fellowships, Elba Conference,
Internal BBoard).
-Met with Donna regarding the maintenance of the LIGO Visitors webpages.
- CaJAGWR: compressed the video of last week's talk by Massimo Tinto.
Video and the viewgraphs will be posted after the final security clearance
by JPL. Updated the seminars page.

(Larry)
-Worked with Lisa in getting the KVM switch swapped out in the server room.
Will be ordering a new one this week and the backup switch will be swapped out
when the new one arrives.
-Worked a couple of server and web issues.

-----------------------------------
Data Analysis Activities (Anderson)
-----------------------------------

* David Chin reported there were bugs in his clean locked segments,
  invalidating the SFTs I have generated.

* Since new release of ldas needs to be pushed to the sites next week,
  I will need to update the knownpulsardemod DSO to run under the latest
  releases of lal, lalwrapper and ldas.  Once this is done I will
  regenerate the SFTs at the sites.  The plan will be have this completed
  within two weeks from today.
(Greg)

* I have figured out how to build Masahiro & Daniel's Event Analysis
  Tool for distribution as a LIGOtools package on Solaris and Linux, but
  my testing of the Tool has found some apparent memory usage
  inconsistencies which are still being tracked down.

* Participated in a workshop about grid-computing security mechanisms
  using digital certificates, which is a technology being considered for
  use by LIGO for remote data analysis using LDAS, etc.

* Participated in discussions with Igor and others about strategies
  for federating the various LDAS databases and/or replicating data from
  one database to another.

* Worked with Veronica to improve the "Science Links" web page which
  is replacing the old Research Bulletin Boards web page.
(Shawhan)
 

LIGO II/Advanced R&D (Sanders)

For adv LIGO:

Bill Kells
Have completed a basic analysis of CR matching into
a (AdL) double cavity. The result is rather universal
thanks to the ~"degeneracy" (actually effective anit-degeneracy)
of the first (RC) cavity. As often the case, the result seems
simple in hindsight. Will be summarizing in write-up.
 

From: Helena Armandula <ahelena@ligo.caltech.edu>

Advanced LIGO Coatings
Received Ta2O5 / Al2O3 coated substrates from MLD. The coated parts will be evaluated for absorption and mechanical loss.

Advanced LIGO Suspensions
Received 4 polished substrates made from high density glass (# 24935 from Viox).
The parts will be used to evaluate silicate bonds.
 

From: Janeen Hazel Romie <romie_j@ligo.caltech.edu>

40m Suspensions
The three mode cleaner suspensions are in the chambers.
AdLIGO Suspensions
Calum, Norna and I are working on the MC suspension assembly. I'm looking into increasing the MC structure height to accomodate an optical table to beam height of 5.5", which is the same as the SOS beam height.

I received the LEDs and photodiodes for the sensor/actuators for the controls prototypes.

Working on a drawing template for Solidworks and AutoCAD for all AdLIGO drawings.

Working on combining the Solidworks files for the MC suspension assembly and the HAM chamber assembly, with the optical table moved to its lower (-315mm) position, to check for height clearances.
 

From: ctorrie <ctorrie@ligo.caltech.edu>
Mode Cleaner Suspension

Both CIT and GEO people (NAR, currently visiting Caltech, and colleagues at
Glasgow) are working on MC suspension design. We plan to have a drawing
review on Monday, April 22nd at 9:30am pacific. At that time, we'll go
over the mode cleaner design parameters and the drawings themselves. I am
taking  the drawing package to GEO when I visit in May.

Janeen and I met with Dennis Coyne and Ken Mailand to discuss a
standard drawing template for AdLIGO AutoCAD and Solidworks drawings.
Janeen will make up a template and distribute this week.

Janeen and I met with Norna, Phil, Mark Barton and Harry Ward to discuss the electronics for the Mode Cleaner and other suspensions. Specific numbers off for each suspension were discussed.

We have started to look at the Recycling Mirror design parameters.
____________________________________________________
From: David Shoemaker <dhs@ligo.mit.edu>
Subject: SWG: monthly reports

=======================================================

no reports from the seismic isolation people; please see
http://www.ligo.caltech.edu/~coyne/seismic_upgrade/design_review/seismic_upgrade.htm
for adequate documentation of their activities over the last few months!

================================

SWG progress Report for the Syracuse Group
submitted 10 April 2002 by Peter Saulson
Annealing chamber
Our annealing chamber for long vertical samples
is almost ready. We took delivery of a glass insert,
with plumbing for clean gas flow. After a few small
modifications, we should be ready to start annealing
fibers and rods.

Search for excess noise in anelastic apparatus
Scott Kittelberger has been analyzing time series
of noise from various sections of his electronics using
the same procedures as if he were measuring step function
responses. He is trying to track down the source of the
excess scatter in his measurements. There are hints that
the problem may be in his pre-amplifier of differential
amplifier.

Violin mode monitor
Andri Gretarsson has now taken all of the data for his
thesis (by construction, as he has now moved to LLO to
start his postdoc.) He took long undisturbed data sets
on his stressed tungsten wire at several different stresses.
He also measured ringdown Q's from driven motion, to compare with
Q at the Brownian level. (They agreed, until very large motions were
used. Apparently the clamps at the wire ends changed their properties
after a large drive.) Shortly before leaving for Louisiana, Andri
installed a fine silica fiber, and took noise data on its violin modes.
Andri defends his thesis at the end of May.

Personnel note
Steve Penn has accepted a faculty position at Hobart and
William Smith Colleges in Geneva, NY, to start this fall. He'll
be setting up a lab to do SWG-related research. Until that's ready,
he'll continue to do some research work in Syracuse. (Hobart is about
a 1 hour drive away.)
 

=================

10th April 2002
Suspensions Report from Norna Robertson covering GEO Glasgow and NAR at
Caltech.

A. Materials
1) Measurements on coating losses (to be reported by Sheila Rowan for
Stanford/Glasgow)
2) Bonding to heavy glass (E Elliffe).
4 different samples have been tested :
VIOX leaded glass V1656, density 3.84 g/cc
VIOX bismuth glass V1586, density 4.20 g/cc
VIOX leaded glass 24935, density 6.77 g/cc
VIOX bismuth glass 19911, density 7.23 g/cc
A silica ear was bonded to one of each sample (see attached picture).
Three of the four samples showed high bond strength, stronger than
silica to silica
bonds previously tested and some done at the same time as the heavy
glass samples, under the same conditions. The weakest bond was to the
highest density 7.23g/cc sample. From subsequent measurements it was
found that the higher density glass samples (6.77 and 7.23 g/cc) were
not flat but convex. All of the
samples showed rounding off at the edges (approx 2 mm ring) Some
staining was also visible on surface of the higher density samples. It
was surprising the 6.77 g/cc sample bonded so well given its shape. It
appears that the polishing technique particularly for the higher density
glasses needs some attention.

http://www.ligo.caltech.edu/~dhs/SWG/heavyglass.JPG

Key to picture. Top left V1656, top right 19911, bottom left 24935,
bottom right V1586. In top right sample the ~2 mm rounded off ring round
the edge can clearly be
seen.

B. Other Suspension Matters
1) Continuing work on design of modecleaner prototype for LASTI,
including mechanical drawings, and general design work for blade tests
(R Jones, A Grant, E Elliffe, G Cagnoli + CIT, JR, NAR at Caltech)
2) Continuing work on design and costings of mechanical parts (coil
former, holder etc) for local control for prototypes at Caltech and
LASTI (R Jones, E Elliffe + CIT Caltech)
(see Caltech report for further details of 1) and 2))

========================

Phil Willems

Fused silica suspensions:
-------------------------
Nothing to report.
Silicate Bonding:
-----------------
We have begun learning to use an atomic force microscope located on campus to
measure silicate bond interfaces. This could be a powerful tool to study creep.
It will also allow us to study the surfaces of differently-prepared fused silica
resonator samples provided to us by Boris Lunin.
Electrostatic charging of test masses:
--------------------------------------
We have begun plans to install cosmic ray detectors around the Moscow pendulum Q
chamber to better understand the charging events they see.

=================================

Janeen Romie
 

AdLIGO Suspensions Summary
CIT and GEO people (NAR, currently visiting Caltech, and colleagues at
Glasgow) are working on MC suspension design. We plan to have a drawing
review on Monday, April 22nd at 9:30am pacific. At that time, we'll go
over the mode cleaner design parameters and the drawings themselves. Calum
will be bringing the drawing package with him to GEO in May.
We are also looking at the RM design parameters.
CIT and GEO people are also working on the electronics design, whose
hardware is required for the controls prototypes. NAR has been considering
overall gains in local control for required settling times, and
corresponding sensor noise levels. Harry Ward is working on the
analog/front-end electronics and LIGO Lab will be working on the digital
electronics. To that end, we will be purchasing a dSPACE system for
controls development and testing. For the controls prototypes, it has been
decided that local control will be accomplished by a hybrid LIGO1/GEO
co-located sensor/actuator with the LIGO1 sensor and the GEO
actuator/magnet pair. Global control actuation will be accomplished by
using LIGO1 "osem" units with magnets on the penultimate mass and the
test mass. The sensors in the units can be used for diagnostics.
Calum and Janeen met with Dennis Coyne and Ken Mailand to discuss a
standard drawing template for AdLIGO AutoCAD and Solidworks drawings.
Janeen will make up a template and distribute this week. We will publish
these templates, upon agreement.

==========================

Rich Mittleman

MIT QUAD PENDULUM

Following Calum Torries calculations the masses on the reaction chain
have been trimmed. Mass has been removed from the bottom mass and added to
the top mass. This should correct the under damped pitch modes which have
been previously observed. The under damping of these modes has been
attributed to a greater than expected vertical distance between the center
of mass and the break off at the end of the blades springs on the two
middle masses. This is a result of the blade springs having a slightly
smaller spring constant than expected. The chain will be reinstrumented
and remeasured in the near future.
The discrepancy between the model and the measured two high frequency
modes, bounce at 29.3Hz and roll and 21.4Hz has been resolved.
The optimal damping level has been found and all of the low frequency
modes (<6Hz) damp well except for the previously mentioned pitch modes.

BSC Stack Characterization

The MIT BSC has been instrumented with 20 sensors (3 different types of
geophones and 1 type of accelerometer) and 4 shakers. The shakers and the
ambient ground motion we are characterizing the response of the LIGO-I
stack and support. The included plots
http://www.ligo.caltech.edu/~dhs/SWG/ExtZtoGeoXYZ.jpg
http://www.ligo.caltech.edu/~dhs/SWG/VDrivetoGeolXYZ.jpg
http://www.ligo.caltech.edu/~dhs/SWG/VDrivetoWilXYZ.jpg
http://www.ligo.caltech.edu/~dhs/SWG/VDrivetoWilangle.jpg

are only one step past raw and are
very preliminary.

==========================

Sheila Rowan

Report from Glasgow/Stanford on Q related work:
Since LSC, experimental measurements focused on investigation of any time dependence of Q of coated samples. Preliminary results suggest may see some degradation of Q with time - still under investigation.
Two Al2O3/Ta2O5 coated silica samples from MLD next in line to be measured as part of the main coating loss program.

After discussions at LSC, calculations of ("standard") thermo-elastic damping in
thin flexing samples of sapphire revisited re: using thin coating samples
- still looks to be at a significant level.

=====================
Helena Armandula

Heavy glass
Received four polished 1/2"dia. substrates made from Viox # 24935. This is a high lead glass with 6.77 gm/cc density.
The company that polished it, J.L Wood, had a very hard time keeping the glass from staining.
The substrates will be silicate bonded to fused silica to test bond strength.

=====================

Gregg Harry

We have been finishing up Q measurements on the
silica/tantala coated samples. We measured the
drumhead mode of sample 3, which is coated with 30
layers of silica/tantala in even proportion. The
Q was 424,000. We also measured the drumhead mode
of sample 4, coated with 2 layers of silica/tantala
in even proportion. The Q was 6.4 million. These
values give coating phi's of 1.7 10^-4 for sample 3
and 1.9 10^-4 for sample 4, which are a little high
compared to other modes. We are continuing to make
measurements on sample 4.
We have finished the FEA modeling and calculation of
the energy in the coating for all measured modes. For
both the butterfly modes and the drumhead, the ratio
of energy in the coating to the substrate increased
by 5 percent from the values presented at the LSC
meeting. This means the predicted coating phi dropped
to around 1.5 10^-4 from 1.7 10^-4 presented at LSC.
This makes it closer to the value 1.0 10^-4 measured
on the even silica/tantala sample coated by REO.
Using the final values from the FEA we find phi values
for silica and tantala; phisio2 = -0.26 +/- 0.43 10^-4,
phita2o5 = 2.3 +/- 0.15 10^-4.
We are in possession of a 30 layer alumina/tantala  sample
coated at MLD in Oregon. It will be the next sample
we measure.

====================

Mark Barton

I've been doing validation on the thermal noise code. In fact I hadn't
been calculating it right and in the process of correcting it I got a
good education in the physics of dissipation dilution which it might be
of interest to summarize. The general principle is that the net restoring
force can be broken down into two components: (i) that due to first order
dimension changes in elastic objects and (ii) that due to changing the
mechanical advantage between elastic objects under constant stress and
the output. Only the first component contributes to the net loss, but
early versions of my code did not take this into account. The fix was to
calculate the elasticity matrix for stage 0 of the calculation twice, the
second time setting all the static forces and tensions to zero, and to
apply the loss angle multipliers only to the tension-free elasticities.
The fix has been tested on a toy model of a simple pendulum and has been
validated against analytical predictions. The corrected toy and quad
models can be downloaded from <http://www.ligo.caltech.edu/~mbarton/
SUSmodels/>. The fix for the triple model will be straightforward but I
haven't gotten to it yet. The quad model is now more or less feature
complete. The only thing remaining to be done is to put in better values
of some of the more obscure blade parameters, but it can be used as-is to
study most things connected with the 24 low-frequency modes.
 

For additional information about this report, contact sanders@ligo.caltech.edu