Weekly Report for Week Ending September 29, 2005

Highlights	LSC	Administration	Hanford Observatory
Livingston Observatory	Detector	40 Meter	TNI
LASTI	Data Analysis	Adv. LIGO Development	Past Weekly Reports

The LIGO Executive Committee Agenda for Monday October 3, 2005 will be:

(Meeting time: 10:30 am Pacific Time)

Announcements
Comments on Weekly Report
LSC Issues (Saulson)
LIGO Lab Operations

Administration (Lindquist)
Sites (Raab, Zucker, Shoemaker)
Commissioning (Fritschel), Detector (Coyne)
Campus Research Facilities

40 Meter (Weinstein)
TN, ( Libbrecht)
LASTI (Shoemaker)

Data Analysis and Computing (Lazzarini)

R&D and Advanced LIGO (Shoemaker)
CHANGE CONTROL BOARD/TECHNICAL REVIEW BOARD SESSION AS NEEDED

Special Items:

Special Announcements:

Weekly Report Highlights

LSC Issues (Saulson)

No report

LIGO Laboratory Administration (Lindquist)

STATUS OF LSC MOUs (Lloyd)

Completed all the changes received so far and posted them, along with two of the new MOUs (University of Sannio at Benevento/University of Salerno and University of Texas at Austin).
Submitted the MOUs listed below for approval to proceed with obtaining signatures. (These MOUs were accepted by the review panel, ready as submitted or with changes that I have now made.)

ACIGA, Balearic, CaRT, CEGG, Columbia, GEO600, IUCAA, Michigan, Moscow, NAOJ, Northwestern, Oregon, Penn State, SLU, Sannio, Southern Univ, Stanford, Syracuse, TexasB

The following MOUs were also accepted (pending modifications) by the review panel and will be processed and posted as I receive them:

Carleton College, Louisiana Tech, LSU, Florida, Goddard, Hobart & William Smith, IAP, Loyola, Rochester, Trinity Univ, Univ of Washington, Washington State, University of Wisconsin, Milwaukee

Non-LSC MOUs (Lloyd)

No report.

SITE TELECONFERENCE (Lindquist)

A site teleconference was held Thursday, September 29, 2005. The following issues were discussed:

The list of assigned actions updated through September 01, 2005 will be found Here.

PROPERTY MANAGEMENT (Chargois)

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

Nothing significant to report.

DOCUMENT CONTROL CENTER (Turner, Mak)

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

No report.

>From: Cleveland Mak <mak_c@ligo.caltech.edu>

Working on "P Document Project"
Assisted in sending out the contract for the Construction of the Science Education Center at LLO to Cangelosi Ward General Contractors.
Assisted in sending out two RFQ's (Fabrication for Vacuum Housings for Pod Assemblies and Fabrication for Actuator, Locator Sub-Assembly and Tooling)
Total volume of handling incoming/outgoing packages was much higher than normal.
**Update on Scanning Project** - The remaining boxes of account files are still being scanned and book-marked. These should be done fairly shortly (end of this week or early next week). The next set of boxes we will be tackling is 16 boxes of Larry Jones' old files that were stored in the sub-basement.
Activity:

Week Ending

09/29/05

Out

Packages

Faxes

FINANCIAL SYSTEMS (Cronin, Brambila, Kaufman)

>From: "Cronin, Holly" <Holly.Cronin@caltech.edu>

For ACCOUNTS PAYABLE HISTORY DATA Press Here.

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

Received several TechMart requisitions submitted directly from LIGO Hanford Observatory for the purchase of goods. The orders were placed quickly and there were no delays. The orders went out and Hanford was notified of the estimated delivery dates.
Purchased a turbo pump from Osaka Vacuum. Completed the internal modification to change the expenditure type on this order.
Completed the no-cost extension of the MCI blanket order which covers the payment of the LIGO server modem. This was the only blanket purchase order on the list that has been extended for the new fiscal year.
There are several blanket purchase orders that will be closed out after the new fiscal period begins. Alternate methods are available and this change in ordering goods or paying invoices is not estimated to impact the level of service provided nor delay the purchase of goods.
Completed change order #3 to Raytheon for the new System Administrator and routed it for approvals.
Placed several orders purchase orders for fabricated goods and for equipment which have long lead time. The orders are booked with the vendors and are in process.
Completed change order #30 to Waveprecision for the order of the fused silica substrates.
I have several tax credits pending to be issued by vendors while they research and approve the issuance of the credits. The vendors charged sales tax on orders for the off-site facilities that should be exempt.
The five-year maintenance agreement has been issued to Dynamic Systems. We would have to give notice to the vendor latest by January 31, 2006 if we wish to cancel the service for Year 2. I have notified Dan Kosak and also noted it in my calendar to raise the question in January 2006 before the 60 days lapse into the new maintenance year. The rate for Year 2 will be approximately $46K and is considerable so we need to be proactive and make a decision before Year 2.
Made arrangements for several items returned on credit card purchases. Coordinated the returns and am waiting for the pending credits to be issued.
Completed the monthly purchase order reports and submitted them to management.

>From: Florence Kaufman <fkaufman>

Worked on updating reports for September.
September report for Ops & R&D will include a column showing the current FY06 budgets. This can be used to compare the budgets with the FY05 budgets as well as the expenditures through September, to check for reasonableness of the FY06 budgets.
Financial reports can be found at: http://docuserv.ligo.caltech.edu/~fireport. (For passwords contact Florence.)

SUBCONTRACTS MANAGEMENT (Jasnow, Salone)

>From: Gina Salone <gsalone@ligo.caltech.edu>

Nothing significant to report.

>From: Ed Jasnow <jasnow@ligo.caltech.edu>

The contract for the construction of the Livingston LIGO Observatory Science Education Center has been sent to Cangelosi-Ward for signature. When the contract is executed and performance and payment bonds have been submitted, a formal Notice to Proceed will be issued. A formal kickoff meeting has been tentatively scheduled for the second week in October.
The architect for the LLO SEC has been requested to submit a proposal for the performance of construction management for the full period of construction.

SUPPORT (Baldon, Hiroto, Lloyd)

>Irene Baldon

Processed the paper work for six (6) new/revised trips. At this time there are eight (8) trips completed or in the works but are awaiting the necessary paper work to enter the P-Card system.
Completed ten (10)Expense Reports and there are twelve (12)reports yet to be done. I continue to contact travelers who have outstanding Expense Reports (more than one (1) month old) to ask for their cooperation in sending me their receipts so that these can be closed in a timely manner. Presently there are six (6) reports more than thirty (30) days old. I have four (4) reports awaiting signature at this time. Worked on copying and recording all the expense reports completed last week to be sent to Travel Audit for final auditing and payment.
Reconciled thirteen (13)P-Card charges for the week, requiring telephoning hotels and car rental agencies to verify which traveler used my card and for what amount.

>Julie Hiroto jhiroto@ligo.caltech.edu

No report.

>Dorothy Lloyd

Processed the usual invoices for payment and followed up on problems. Reviewed and recorded payments processed during the months of July and August.
Processed the usual requisitions for purchases over $10K and standard POs, as SOS buyer, for those under.
Jim continued with data entry in the LIGO database and helping out in the DCC.

PROPOSALS and REPORTS (Lindquist)

Additional material for request for supplemental funding for Operations for FY 2007 and FY 2008 has been prepared ready for final review and forwarding to the NSF.

DCC Steering Committee (Lindquist)

Purchase Orders for new document management software, support, and the hardware to put it on are in process.

CHANGE CONTROL/CONTINGENCY MANAGEMENT (Lindquist)

No open change requests.

HUMAN RESOURCES (Akutagawa)

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

No special activities to report.

Quality/Safety (Tyler)

>From: Bill Tyler tyler@ligo.caltech.edu

No report.

LIGO Hanford Observatory (LHO) and Interferometer Operations (Raab)

Summary of Commissioning Activities at LIGO Hanford Observatory (Landry)

Interferometers were decidedly touchier this week. Problems on the 4k were due in part to excess AS_I, the origin of which is not yet understood, but may be due to DC misalignment in the IFO, or perhaps reduced gains in WFS paths. ASPD4 had been swapped out because of burn spots, but the swap did not induce the excess AS_I as it is high (and different) on other PDs. See the ASPD checkout and discussion in the first 4k bullet below.

Some commissioning highlights:

fast channels have been successfully written to frames, and were confirmed to behave as expected, in that gain and phase paths did what they're supposed to do

4K IFO

The AS_I servo signal has been latching during startup of TCS servo: there is excess AS_I, the signal saturates and latches as there is a sign flip and the servo no longer drives the error signal to zero. Non-linearity found to be worse in ASPD3 and 4, than in the other two AS PDs. The TCS servo was modified in light of the ASI woes. PDs and electronics were investigated: the upshot is, the electronics are working as advertised and not responsible for the AS_I problem. Batches of PDs vary in there specifications, however, which may contribute to our problems. ASPD positions and beam sizes are shown in this schematic.
improvements in oscillator phase noise coupling over the last eight months are described (we're a factor of 3-10 better than in Feb 04)
When testing the new POPI servo that uses POS as an error signal and the fine actuators for feedback (intended to mitigate scattering in end stations), ETMX was rung up and stuck electrostatically. As per the Montana quake this summer, the optic was later freed by shaking and partially venting the BSC. Seismic upconversion was studied: a model was made and POS data employed to predict the effect of scattering in EYon IFO noise. The POPI servo was later closed, and some results were elogged: the 1.2 and 2.1Hz stack modes are quashed by 3-4dB in displacement, but some noise creeps up between the two resonances.
the CM servo began acting up

2K IFO

frequency noise was assessed for the H2 noise budget
initial attempts at high (6W) power failed on the 2k, as SPOB and arm powers went the wrong way. A second attempt was made, with similar results, once ASPD4 was removed from the loop. From 3W upwards, there is no indication we get more power into IFO, e.g. for a 40% increase into IFO, we get no increase in the calibration line amplitude, and ~20% drop in SPOB and arm power. Feh. A suspicion is that there is too much RF in these PDs and saturations are present.
the common mode unity gain frequency was found to be too low

DAQ

IRIG-B was broken, causing h1awg to flash red and junk to be sent out of the calibration line excitation point point
Testing of the state vector for S5 is underway

Outreach (D. Ingram)

Outreach coordinator D. Ingram exhibited LIGO materials at INL's Science & Engineering Expo in Idaho Falls, 9/22 - 9/24.

LIGO Livingston Observatory (LLO) and Interferometer Operations (Zucker)

L1 Interferometer (Frolov)

Interferometer commissioning and low noise running restarted on Monday following the four day shutdown for Hurricane Rita. The work on the reflected beam stabilization (RBS) continues to be the main commissioning activity. Initially the mechanical resonances of the PZT actuated mirror mounts appeared very strongly in the the interferometer dark port signal. With an addition of damping material between the PZT and the mount the resonance peaks have been dramatically reduced and no longer appear in the ifo noise spectrum. The estimated contribution from the pzt motion to the ifo noise is close to a factor of ten below the current noise floor and could be further reduced by additional electronics filtering. After resolving electronics interface issues the RBS control loops were closed. The initial test results with both the single bounce beam from the recycling mirror and the fully locked interferometer have shown that the system is operational and can follow the Faraday isolator thermal drift up to 4 W ifo input power. Integration into the interferometer control system, performance optimization, and testing at higher power is underway.

Other commissioning activities this week included:

the measurement of arm cavity ring downs confirmed earlier measurement of the cavity poles
the test of tilt correction on HEPI HAM1 showed only marginal improvement above 1 Hz
the test mass suspension electronics noise budget was produced in anticipation of it becoming a dominant noise source after the upcoming ifo commissioning effort in October

CDS (Bogue)

Worked with Rusyl, Mike, Harry and Danny on shutting down in preparation for hurricane rita. Since we didn't lose power, CDS had no major complications as a result of the hurricane. - Did a full switchover from the primary to the backup framebuilder. Created a written procedure for how to do this. This procedure does not yet include how to create the sam qfs mounts on the backup. I will work with ldas to get that part of the procedure in place.
Worked on a problem with the sense mon displays that the operators use. Apparently, DMT dropped new code that contained changes to existing channel names. All of our plots that use the affected channels are now broken.
Added channels to the daq to support the new RBS system.
Continued troubleshooting problems with the new disk arrays.

CDS code support (Khan)

No report.

Education and Outreach (Thacker)

No report.

Site Safety and Security (Riesen)

Rich is on vacation this week.

LLO Computing and Network Security (S. Roddy)

Most of the last week has been spent working on testing a transition from NIS+ to LDAP. This has been needed for quite some time. I started on it a while back and it was then placed on the back burner for a while. I will also deploy some of the Sun Enterprise software at the same time as the LDAP transition. This is a long and complex deployment and I have at least 50 hours into this already, and I still have a ways to go. I have successfully migrated accounts from NIS+ to LDAP, gotten LDAP working via SSL, installed the messaging server and calendar server. At which point I learned there were a few mistakes made in the beginning. I am now starting over with a fresh install of Solaris and should have things going by early next week. There are some nice benefits to going to the enterprise software, not the least of which is getting rid of NIS+ which Sun has been threatening to end support for.
Installed Norton AV 10 on several machines.
Testing Norton 10 for the Mac. Seems OK so far... Once I am satisfied there are no major bugs, I will have our Mac users install it.
Received the new Dell for Ken. He seems happy with the new machine.
Received the new Laser Safety computer yesterday. It is in the MSR and needs to be installed with Win XP.

LLO General Computing and LDAS Support (D. Giardina)

Assisted Janeen Romie with printer setup.
Assisted Bonnie Wooley with updating some html documents.
Ordered replacement disk for last bad disk in T3-13 (spare).
hdb failed in node28, replaced with new disk. this disk is still under warranty and will be returned.
Returned two disks (from nodes) that were still under warranty; awaiting replacements.
LDAS equipment move and ensuing troubleshooting of various problems encountered when systems were brought back up.

HPLF, Optics Modeling, Data Analysis and L1 Commissioning (Franzen)

Ken has been working exclusively on the detector RBS project, reported under L1 commissioning.

Mechanical Engineering (Spjeld)

accessing the PDM Vault and updating the Quad SUS install fixtures models and drawings
converting drawings for the kinetic pendulum wall to pdf files and working on assemblies
working on redesign and drawings for the HAM door removal tool

LDAS/Condor Sysadmin and Burst Analysis (Yakushin)

LDAS moved downstairs. It took three days: the system went down on Monday afternoon and came back on Thursday afternoon. At first glance, everything seems to be working.

Initial LIGO Detector Science & Engineering (Coyne)

CDS

see also the CDS weekly meeting minutes in the commissioning archives

CDS Software

Rolf Bork

A number of change requests for software have come in during the past week:

Change the input to the useismic filter on LHO4k ETM from the position filter output to the position filter input. This is done and will go in today.
Changes to have the LSC front end trigger the fast shutter while attempting to maintain lock by switching automatically to ASPD5. This is a more complex change that is still in progress. We plan to put the Epics part of the change on to LHO2k today, with the front end code to follow in the next few days.
Updated the daqLib software to provide a decimation filter for 64x decimation (previous code only had up to 32x decimation support). Filter definition was developed by Rana. This change is needed to record suspension 16K signals at 256Hz. This is being installed on LHO2k today for all large optic controllers..
M. Evans requested a change to filter module software to try and prevent integrator run away. This change was put in as a compile option and will only be loaded on LHO2k LSC today as a test.
Modified a version of the LSC code to output the DARM_CNTRL signal through a Pentek DAC channel. The idea is to get an independent analysis of the noise seen in this signal in the DAQ by using a hardware analyzer. This code is loaded on to the LHO4k LSC, but I have not heard of any results as yet.
Along with updating all of the LHO2K front end software today, we are also looking at switching the associated epics to the latest version. Some systems are not responding well to that change at the moment, so we may revert to the older version. This epics change is only for the Linux boxes.

CDS Hardware

Jay Heefner

Refl Beam Stab

The modified chassis has been installed at LLO. New chassis for LHO will be started as soon as operation of the modified chassis is verified.

DMT

no report

PSL

Peter King

A way was found to incorporate the capacitance changes as a function of applied bias voltage for a photodiode in PSpice. I have not had a chance yet to actually implement it in a circuit simulation. In addition some breadboarding of a discrete photodiode front-end was done. Comparisons with the model will be made.

An 80 MHz VCO is being dusted off for shipment to LASTI. Contrary to what I first thought, the unit is an addition and not a replacement.

Dennis Coyne

Peter Fritschel, Stan Whitcomb and I visited JDS Uniphase to discuss continued maintenance support for the LIGO 10W lasers. JDSU is focused on commercial product and so can't perform any further development work in support of LIGO. However they are willing to support continued refurbishment with the stockpile of matched SDL pump diodes reserved for LIGO lasers. It seems that this will be sufficient for the duration of the S5 run at least. A plan for maintenance/refurbishment will be proposed by JDSU. Internally LIGO Lab is also planning for the post-S5/pre-AL laser needs.

40 Meter Interferometer (Weinstein)

Osamu is at LHO for a couple of weeks to help with pre-S5 commissioning.

IFO commissioning:

Rob, Osamu and Rana have been working on bringing the IFO into full lock with resonant arms. Osamu was able to transfer control of CARM from DC to RF at POX and/or POY pickoff RFPDs, but has not yet succeeded in switching control to SP 166.
Rob and Rana tried several things to aid in reducing the CARM offset. These include: smoothing over the transition from high-gain to low-gain in the DC signal from the transmitted PD; changing the 'optical plant compensation' filters in the CARM bank; lowering the DARM loop UGF and changing its filters to avoid instability as the light power increases; checking carefully for coil driver saturations. Most of their changes helped. But, noise continues to drive large power fluctuations and lock loss before full arm resonance is acheived. Noise reduction efforts continue.
Rana measured the relative gain of the MCL and MCF components of the MC servo, and the frequency of the length/freq crossover. He measured it to be ~ 90 Hz. He then lowered the crossover to ~60 Hz, near the peak of the phase bubble, which reduced the frequency noise as measured by the XARM error signal in the 60-100 Hz region.
Rob and Rana continue to hunt for different lock acquisition strategies, both for the 40m and for AdLIGO.

IFO modeling:

Monica continues to work on locking studies with her 40m/AdLIGO e2e simulation. She is simulating sweeps through arm resonances in the full IFO, at various velocities, and plotting properly normalized signals to look for the largest and most promising ones for controlling CARM.
Rob is developing his AdLIGO Finesse modelling tools, and sharing them with Rana and Peter Fritchel.

DC detection development:

Mike Smith is in the process of making final part drawings for the OMC. The Solid Works model was set up parametrically, so the mode cleaner length can be changed and the parts will adjust automatically to accomodate. Ken Mailand is helping him analyze the normal modes of the structure with Algor.
Steve has been looking into the availability and pricing of brass for the output mode cleaner, which should have better-damped internal resonances. It is also vacuum compatible, relatively easy to machine, relatively low cost, and relatively low thermal expansion.
Steve has spec'ed vacuum feedthroughs for the in-vac DC PD electronics can.
Rana suggests building as much of the in-vac DC beamline as possible on a single breadboard, so that it can be pre-aligned in air before installing into the output optic chamber.
Rana and Ben have been looking at a different DC PD circuit design to handle hundreds of mW of input light power. They will route the resulting current into a high-power vacuum-compatible resistor, which will produce up to 5 watts of heat, sinked to the table.

Electronics, controls:

Dan has finished the diagonalization of the three mode cleaner suspended optics (M1, MC2, MC3) and has updated the output matrix for all 3 MC optics. He attributes improved noise at the bounce mode to his efforts.
Dan is now taking measurements to evaluate the improvement in coupling between POS-PIT-YAW in the MC suspensions. This is important because the MC alignment servo injects frequency noise onto the beam due to ANG->POS couplings, so the gain is turned way down. Next, Dan will see whether the MC alignment servo gain can be turned back up.
A limitation on the MC suspension diagonalization is the large bias voltage applied to the suspension PIT and YAW, especially on MC3. Dan and Ben are now getting RevB coil drivers onto the MC suspensions, to eliminate this problem.
Rob and Dan found and jiggled a flaky cable on the MC3 satellite amplifier box. They will get Bob to replace the connectors or the whole cable.
Rob wrote some scripts for gain matching the transmitted light QPDs and thorlabs PDs, so that the length sensing system can switch between them smoothly.
Rana suggests suppressing 60 Hz/harmonics coming in to the LSC demod boards through the RFPD cables, by winding the RF lines around ferrite donuts, and maybe even coupling through 1:1 transformers.
Rana suggests adding passive filters to the LSC signal whitening boards to suppress HF noise, as is done at the sites.

Thermal Noise Interferometer (Black)

Nothing significant to report this week.

LASTI (Ottaway)

This week we welcomed a new graduate student into the lab. Brett Shapiro has joined our group, he intends to do a Master degree in Mecahnical Engineering with a thesis in LASTI related work. His first task will be to characterize the Quad when it arrives and extend the controls work done by Laurent to cover the quad. Welcome Brett !!

Work continues on the suspended cavity and its use to characterize the the frequency noise of the PSL. This will continue until we vent in Mid October to install new optics and the second triple.

We have decided to modify the length of the suspensions that are used in LASTI SOSs. The aim of this is to shift the pendulum frequency from 1.0 Hz to 0.7 Hz. The reason for this is to shift the resonant frequency to the "hole" in our seismic spectrum. There is approximately 3 X less motion at 0.7 Hz as there is at 1.0 Hz. These modified SOSs will be installed and tested during our next vent.

The triple will be shaken down and prepared for installation in the next few weeks. In addition to this we are ordering an optical fiber system to port the PSL light to the Xend HAM for the triple and future LASTI tests.

Rich Mittleman reports:

WE have implemented a feed forward system from the BSC chamber to the HEPI actuators, the filters are designed. WE are waiting for the construction that is taking place on the alley behind the building to stop so that all of our sensors are not saturated.

Data Analysis and Computing (Lazzarini)

Simulation and Modeling (Bhawal)

E2E Weekly Physics Meeting

Sany Yoshida presented the seismic isolation model (based on a model by Brian of Stanford) they are preparing using e2e modules and results from some preliminary runs. Physics behind modal model implementation in e2e modules was also discussed.

Mechanical Simulation

(Mark Barton) This week I spent investigating the mystery of why the quad pendulum control prototype was unstable in pitch. The suspicion was that we were somehow not correctly allowing for the stiffness of the wire. The Matlab model of the suspension neglects the wire stiffness and assumes all the pitch restoring force is gravitational. To get a suitably low fundamental pitch frequency under these assumptions requires that for each mass, the attachment points for the wires coming down from above be about 1 mm above the COM, and those for the wires continuing down below be about 1 mm below the COM. To maintain this frequency with stiff wire, the attachment points have to be adjusted in the unstable direction by relatively large amounts, of up to 5 mm for the upper stages. Clearly, small errors in the theory can be the difference between success and failure.

The theory we were using was given in a paper Cagnoli et al., 2000. To check it I used my Mathematica toolkit to analyze a large number of toy models, including one-, two- and four-wire simple pendulums, and a double pendulum with the top mass hinged about a transverse axis and the bottom mass suspended by four wires. Calum and I also built a two-wire pendulum in the lab. It turns out that we were applying the corrections correctly for the most part, except in the top two stages where the wires are further apart transversely at the top than at the bottom. In such a case, the flexure correction has to be reduced by a factor Cos[theta]^ (3/2), where theta is the angle to the vertical. However this is a relatively modest correction and it's not clear whether it explains the whole problem. I published all of the toy models, plus some variants on the quad and triple models used for the present study and others that had been in the queue on my models page at http://www.ligo.caltech.edu/~mbarton/SUSmodels/

FFT studies

(Biplab) -- Had communication with Pablo Barriga (of University of Western Australia) who now confirmed that his results are now matching with my results for diffraction losses of various modes in Advanced LIGO. Earlier, in some cases, he was getting numbers contradicting my results that the actual(FFT) diffraction losses are more than what one can get from simple 'tructated Gaussian' approximation. The problem was traced down to improper choice of window size and resolution which was affecting his results especially for higher order modes.

Discussed with Hiro the low recycling gain of TEM70 in cavity of (say) 18cm radius mirrors -- we could sort out how such a low number may arise. All figures showing how TEM70 mode changes from its ideal profile can be viewed here: http://www.ligo.caltech.edu/~bbhawal/Blair/ TEM70_Figures/

AdvLIGO seismic isolation modeling

(Sany Yoshida) Made an e2e box to test the ABCD (sate space) matrix provided by the Stanford group. This matrix takes 87 inputs (ground motion x,...etc) and computes 94 outputs (stage_1_x,... etc). To test the box file, provided white noise to only one input port keeping all other inputs to be zero. The box file gives non-zero values at several output ports. The result of this computation is being examined.

Simulation of 40m Advanced Interferometer

(Monica) Characterization of the optical parameters for one single arm (Dual Recycled Michelson + XARM): the relative mirror velocity has an order of magnitude of 1e-7 m/s, the estimated Finesse is 5 times the expected value (1200) for a single arm because of the Power Recycling gain. Comparison with the analytical prediction and with e2e will be done next.

Test of lock acquisition stategies (operating point and Common-mode ARM offset reduction): some filters have to be added and also a better model for the seismic motion taking into account the stack resonances. Thinking of new lock acquisition strategies.

AdvLIGO dual recycled cavity modeling

(Biplab and Hiro) Biplab started making a front-end summation-module code in e2e for the dual-recycled Michelson cavity by incorporating Hiro's stand-alone code (based on his calculations) into e2e. There are some build-problems (seems to be unrelated to the code) which we are trying to solve.

(Melody) Assisting Biplab in trying to figure out his e2e build problems.

(Sany Yoshida) Deepened our understanding on the basic mathematical expressions for the scalar (plane wave) model of dual-recycled cavity. Started converting these expressions to the corresponding expressions based on the modal model, by replacing scalar parameters (such as mirror reflectivity) to corresponding matrices.

ALFI

(Bruce)

Reviewing and updating E2E web site documentation and Alfi documentation for the release of Alfi 6.
Working on a secondary alternative to starting Alfi via Web Start for those who may only be able to use Alfi remotely displayed on an X server.

(Melody) Continuing with fixing the Problem Reports (PRs). Working on PR 474: view all windows in a miniature mode. Currently working on a better algorithm to display the windows.

Data Analysis Activities (Lazzarini)

Chatterji:

Continued development of QMon, a DMT version of the Q Pipeline.

Reviewing proposed work plans for a planned PRD publication detailing burst search activities within the LIGO/Virgo joint data analysis working group.

Mandic:

I worked on the paper examining the accessibility of the pre-Big-Bang models of stochastic GW background to LIGO. The paper is nearing the point where it could be submitted for publication.

I am also preparing to calculate the long-term H1-L1 coherence (in DARMERR channels) using the LHO cluster. The goal is to do this at high resolution (1e-3 Hz) and search for the 1 Hz and the 0.25 Hz lines, observed by Mike Landry and others.

With Peter Shawhan, I started preparing for the hardware injections.

Shawhan:

Helped SURF students Sarah Caudill and Sebastian Cassel with final versions of SURF reports.
Committed new LAL code to handle segments and segment lists.
Wrote a program to apply vetoes for inspiral analysis.
Major effort to review StackSlide pulsar analysis, including face- to-face review sessions with Greg Mendell and Mike Landry (visiting from Hanford) and Teviet Creighton and Phil Willems.

Sutton:

My main focus this week was developing and testing Maria Principe's network simulator codes for modelling bursts searches. The package is now fully functional, though it could still use some refinement and optimization for speed. We used the simulator to reproduce the network false rate and efficiency results for the LIGO-TAMA S2 analysis. We're now coordinating with Ray Majumder and Cannon at UWM to model excess power searches, as another test of the package, and also to provide guidance for their S4 and S5 analyses.

On the side, I wrote a matlab script to compute the efficiency of the S3 LIGO-only bursts search in terms of the SNR an optimal filter would see (instead of the traditional hrss). This is intended for the S3 bursts paper Lindy Blackburn is writing.

Weinstein:

careful reading of Chad's ASI Veto paper for Amaldi
review of final mods to S2 BBH paper
review of proofs of S2 BNS paper
Working with Lisa on ringdown search, calculation of peak strain from energy conservation.
Working with new students Drew, Pinkesh and Caryn on starter projects.

LIGO Data Analysis System

Software Systems (Blackburn)

LDAS

LDAS has been shown to work successfully under Solaris 10 (PR#2896) and Fedora Core 4 (PR#2897). The remaining packages that had compilation issues after the full rebuild of /ldcg for both Solaris 10 and Fedora Core 4 have now been resolved. These included the building of emacs 21.4a and gnuplot 4.0.0. The building of acroread in /ldcg for Solaris 10 has been removed as it is now provided in /usr/sfw/bin. The building of xemacs for both Solaris 10 and Fedora Core 4 has been removed since emacs has been successfully compiled for Solaris 10 and is installed by default for Fedora Core 4.

I have tried without success to recreate crashing of the frameAPI when the frame output directory has been removed (PR#2886). This test was only done on a tandem (2 box) system. Later today, I will try to reproduce the problem on the development system.

Incorporated functionality to support TclGlobus into the genericAPI so common code could be used for both the controlMonitorAPI and the under development managerAPI changes to use GSI sockets.

The controlMonitorAPI server and clients now support authentication and data transimisiton using TclGlobus. This functionality is now under development within the managerAPI.

System and Integration tests were performed on LDAS version 1.7.45. A few changes were made to the test scripts to allow proper execution under Solaris 10 and Fedora Core 4. Results of testing have been added to CVS.

TCLGLOBUS

Completed all TclGlobus unit tests on Solaris 10 and Fedora Core 4 with GCC 3.3.6 as well as Solaris 9 and Fedora Core 3 for backward compatibility. TclGlobus CVS has been tagged with 0.3.0 release. /ldcg/lib contains TclGlobus 0.3.0 shared libraries for LDAS main development on the LDAS-DEV system. Currently working on building the RPMs for this tagged version.

TclGlobus 0.3.0 online documentation has been updated with the latest information regarding this release.

OSG/GRIPHYN/IVDGL

(Inspiral work flows on OSG-ITB)

Obtained replacement components for condor_submit_dag and dagman from the Condor support team for a bug related to false DAG cycle abort. Installed these for testing on Verruca.

Assembled VDS binary and script components from the vds-worker-package for VDS 1.4.x release candidate 2. Created a web page for UWM and PSU systems engineers. This page is served from http://osg-itb.ligo.caltech.edu/Inspiral/ Mods_for_the_LIGO_Inspiral_pipeline_w_Condor_6.7.7_OSG.html

Attempted to test gencdag (Pegasus Planner) from Verruca but LDAS infrastructure required by Duncan Brown's components is not available due to changes made by Stuart Anderson on Wednesday September 29.

(GUMS and PRIMA configuration)

Created an OSG Twiki page "LIGO Priviledge Use for OSG" to provide information for other OSG VOs that want to support LIGO VO users on their CEs (compute elements). Sent the URL to an OSG project manager for publication on the OSG Twiki site.

(On-going monitoring and systems administration)

Creating file systems on 8 new hard disks added to the LIGO-CIT-ITB cluster. NFS mounted /usr2/shared/app and /usr2/shared/data on all Worker Nodes. This results in an additional 1.6 TB of storage for supporting OSG users.

Left /usr1/shared/tmp NFS mounted on all Worker Nodes as that location has a cache of the Inspiral_pipeline data which is optimized for OSG testing of Inspiral-dag.0 without requiring the two hour pre-fetch of data from RLS.

Provided text to the OSG public relations group at Fermilab to be used in a poster at the Super Computing Conference in November.

Hardware Systems (Anderson)

Caltech

(Dan Kozak)

Finished cleanup of all RLS entries at CIT. All entries are now syntactically correct and at least plausible semantically.
Got back to work on cleanup of /archive, getting old files into the correct location.
Installed 2 port KVM switch in Powell-Booth.
Participated in Solaris 10 installation on ldas-cit (gateway) and dataserver-cit and reinstallation/configuration of many services.
Patched ldas-cit and dataserver-cit to SAM-QFS/QFS patch 4.4.2.
Helped with getting fibre channel devices back on line at LLO after they were moved.

(Stuart Anderson)

Started upgrading LDAS-CIT to Solaris 10 and FC4.
Upgraded SAM-QFS at CIT to version 4.4.2.
Upgraded ldas-sw to Solaris 10.
Investigating Solaris 10 security settings.
Working with Sun on SAM-QFS mutli-threaded mmap application issue with the /proc filesystem.

MIT

(Keith Bayer)

Continuing to troubleshoot nfs cluster bottlenecks.
Setup several accounts on ldas-grid.

Livingston

(Igor Yakushin)

LDAS moved downstairs. It took 3 days: the system went down on Monday afternoon and came back on Thursday afternoon. At first glance, everything seems to be working.

(Dwayne Giardina)

Ordered replacement disk for last bad disk in T3-13 (spare).
hdb failed in node28, replaced with new disk. this disk is still under warranty and will be returned.
Returned two disks (from nodes) that were still under warranty; awaiting replacements.
LDAS equipment move and ensuing troubleshooting of various problems encountered when systems were brought back up.

Hanford

(Ben Johnson)

Installation of the 22 Ton Liebert is commencing today.
A second file in the past 9 days was found to be published with the wrong md5sum. This seemes correlated with errors on the T3 units. Investigating...
Continuing to work with Sun on the L700 import/export problem.
Replaced power supplies in two previously supplyless nodes. The final node of this pair will come online when sufficient cooling has been restored to the room.
Continuing work with IP Filters. I believe I have recreated the tcpwrappers ruleset on gateway@LHO; though I can't install it on that server until it is upgraded.

General Computing (Wallace)

MIT:

(Keith)

Installed / configured laptop for postdoc
Investigated e-mail troubles
Created gc account for new grad student
Ordered matlab toolbox for grad student
Investigated MAC laptop being dropped from wireless
Working with Ken on his x64 XP to create PDF documents.

Livingston:

(Dwayne)

Assisted Janeen Romie with printer setup.
Assisted Bonnie Wooley with updating some html documents.

(Shannon)

See Livingston Report

Hanford:

(Christine)

Network usage can be seen at http://www.ligo-wa.caltech.edu/~christin/mrtg/198.129.208.1_198.129.77.10.html
The above mrtg graph is not showing all the bandwidth being used. I'm still investigating.
The media converters needed to complete the 10mb/s backup network circuit from Amerion to ESnet in Seattle were delivered on Tues. Amerion and ESnet tested the circuit through the Westin building in Seattle, but were unable to get a link through to PNNL in Richland. Testing and turn on of the circuit continues today. At a yet to be determined time, the primary GigE circuit will have to be turned off to completely test the 10mb/s backup network.
Helped a user map network drives on WinXP.
Rebuilt a Win2k computer three times, still installing application software. A photo card reader attached to the PC corrupted the Win2k system files when the photo card was put into the reader upside down. Unfortunately, it took me three tries before I realized the problem.

CIT:

(Mike)

Upgraded Flexlm Licensing server for Ansys.
Upgraded the PDMWORKS Vault for Solid Works.
Went around updating Symantec Anti-virus software to version 10.0. The old version 9.0 has problems updating. We were able to get West Bridge and Wilson House done. Christian gave me a hand with this.
Finished up burning DVD's of old NTSRV ghost images.
Worked on a DCC issue with Antares. Users could not connect to the database. This was because the database needed to be compacted, debugged and then I had to reboot the server.
Spam filters: continued work on the spam filters.
Ran network cables from Bridge Annex server room to across the hallway to move servers to this area to power up additional servers. This was a big job pulling these cables due to the obstacle course I had to go through.
Other misc. user support.

(Veronica)

LSC: Most time was dedicated to working with the MIT ecommerce provider to finalize the online payment application for the November meeting. We added more payment options, which caused an error message that required troubleshooting on the provider's end. The application has been integrated into the website and is in the production mode. Posted updates to the meeting's website. Updated the database of the LSC publications. Posted several new papers at the website of the LSC-reviewed papers.
LIGO: Website updates. Roster database updates. Dealt with an issue of a group of DCC processed documents not accessible at a public search webpage. Ran the troubleshooting utilities but it didn't seem to resolve it. With the new system coming up soon, it was decided to find a temporary workaround rather than invest much time and effort in fixing this issue.
Project Science: Last-minute updates to the website of the upcoming workshop. It will run Oct 2 through 6.

(Christian)

Dan Kozack: Configured new laptop with the standard Ligo image.
Kent Blackburn: Configured new laptop with the standard Ligo image.
Linda Turner: Configured new laptop with the standard Ligo image.
Wilson House: Updated workstations and laptops to Norton 10.
W/Bridge: Updated workstations and laptops to Norton 10.
E/Bridge: Updated workstations and laptops to Norton 10.
Working on setup and configurations of a couple of new desktop machines.

(Larry)

Still working things out on the SUN maintenance contract. There were a number of different issues at CIT on how the contract should be issued. Hopefully, it is all clarified and we should be able to get it through the system. Made a number of misc. orders for different people. It looks like we will be ordering a few more workstations for the programmers. The Dual Core units are still on back-order.
Assisted Ed C. with a number of property issues. Mainly, just tracking items down and getting them tagged.
Assisted Mike in getting some cables run to room 19. Also, arranged to have the electrical shop run a power cable over to the room for us. Getting things through the ceiling to the room is a difficult process.
Installed a couple of computer systems and delivered a number of items to different people. We've been able to get a number of CRT monitors swapped out with LCD units.
Spent a number of hours going through mail logs to get some issues cleared up. This information was used to track down the source of a duplicate e- mail issue and to verify that some messages had not made it to the mailserver and were not lost in the filtering system.
Setup a couple more new user accounts. Still getting SURF students checked out.
Began installing equipment into room 19. This included setting up a couple of new racks.
The usual user support.

Mail Statistics for Sept. 22-28, 2005

Mail Statistics	September 22-28, 2005
Rejected Messages	19,790
Virus Messages	1,992
False Positives	13
Accepted Messages	15,368
Total Messages	35,158

Advanced LIGO and Supporting R&D (Shoemaker)

Advanced LIGO and supporting R&D

Systems and Management

from Dennis Coyne

See also:

AL Systems web page

AL Systems email archives

Records of Decision or Agreement (RODA)

Requirements

DCN E050036-00 signed to release M030162-A, a revision of the UK Scope document.

Interface Issues

See also the "Interfaces" section of the AL Systems web page

nothing significant to report

Systems Design/Support

Verified by analysis that gravity induced sag on the test masses will not be a problem; for details see T050184-01

Vacuum Compatibility & Preparation

Residual Gas Assay (RGA)

Seismic Isolation

From: Ken Mason kmason@ligo.mit.edu

Advanced LIGO Seismic Structure Procurement Status

Assembly	Status
Top Assembly Components 20007970-A Stage 0 Assembly 2000795-A Stage 1 Assembly 20007825-A Stage 2 Assembly 20007825-A	RFQ complete, awaiting bids. Quotes due 9/30. RFQ complete, awaiting bids. Quotes due 9/30. RFQ complete, awaiting bids. Quotes due 9/30. RFQ complete, awaiting bids. Quotes due 9/30.
Stage 0-1 Spring Assembly 20007878-A Stage 1-2 Spring Assembly 20007890	We have recieved the design for the blade modifications from ASI on CD's. We are currently checking the design and analysis and will meet with ASI to review. We will be creating fabrication drawings from their models. Fabrication drawings for the blade springs are complete. Maher Limited holding maraging steel for blades and flexures
GS-13 Pod Assembly 20007810-A L-4C Pod Assembly 20007820-A STS-2 Pod assembly 20007941-A	Geophones, seismometers and lockers are in house. RFQ complete, awaiting bids for vacuum housings. Quotes due 10/16 RFQ complete for machined components. Quotes due 10/16 RFQ required for internal pod harnesses.
Stage 0-1 Kinematic Lock 20007941-1-A Stage 1-2 Kinematic Lock 20007941-2-A	Tooling design complete. RFQ complete, awaiting bids. Quotes due 10/21
Stage 0-1 Actuator Assy.'s 20007966-A 20007967-A Stage 1-2 Actuator Assy.'s 20007968-A 20007969-A	Tooling design complete. RFQ complete, awaiting bids. Quotes due 10/21
Stage 0-1 Standoff Pin Stage 0-2 Alignment Tower and Washer Stage 2 Keel Plate Alignment Tower Blade Pre-Load Tooling Blade Calibration Fixture Modifications LASTI Test Stand and Spreader Bar	Solidworks part files exist for the standoff pin and alignment towers. They will require a dimensioned drawing and checking prior to soliciting bids. The blade pre-load tooling and calibration fixture tooling will require redesign following the redesign of the blade springs by ASI. Purchase order for test stand issued to Southern Enterprises. Delivery to MIT by 10/16

Suspension

From: "Mark Barton" mbarton@ligo.caltech.edu

This week I spent investigating the mystery of why the quad pendulum controls prototype was unstable in pitch. The suspicion was that we were somehow not correctly allowing for the stiffness of the wire. The Matlab model of the suspension neglects the wire stiffness and assumes all the pitch restoring force is gravitational. To get a suitably low fundamental pitch frequency under these assumptions requires that for each mass, the attachment points for the wires coming down from above be about 1 mm above the COM, and those for the wires continuing down below be about 1 mm below the COM. To maintain this frequency with stiff wire, the attachment points have to be adjusted in the unstable direction by relatively large amounts, of up to 5 mm for the upper stages. Clearly, small errors in the theory can be the difference between success and failure.

The theory we were using was given in a paper Cagnoli et al., 2000. To check it I used my Mathematica toolkit to analyze a large number of toy models, including one-, two- and four-wire simple pendulums, and a double pendulum with the top mass hinged about a transverse axis and the bottom mass suspended by four wires. Calum and I also built a two-wire pendulum in the lab. It turns out that we were applying the corrections correctly for the most part, except in the top two stages where the wires are further apart transversely at the top than at the bottom. In such a case, the flexure correction has to be reduced by a factor Cos [theta]^(3/2), where theta is the angle to the vertical. However this is a relatively modest correction and it's not clear whether it explains the whole problem.

I published all of the toy models, plus some variants on the quad and triple models used for the present study and others that had been in the queue on my models page at <http://www.ligo.caltech.edu/~mbarton/SUSmodels/>

From: Janeen Romie romie_j@ligo.caltech.edu

Advanced LIGO Suspensions

Working with Helena and Caroline on documentation required for the Ribbon/Fiber/Ear PDR on Oct 19th. Documentation is due on Oct 5th.

From: ctorrie <ctorrie@ligo.caltech.edu>

Quad Controls Prototype

The single chain quad was still successfully suspended after 48 hours. While trying to install the osems anther two LED's failed. At this point we decided to stop and start taking the suspension apart to prepare for the assembly with the reaction chain.

After discussions at the weekly SUS meeting and a subsequent meeting in the lab it is believed that some changes need to be made to the "GEO box" to offer more protection to the LIGO LED's. Bob Taylor is going to fix the broken osems this week. We also discussed the wiring and decided to make changes so that it everything will be the same as for LASTI.

The fully assembled quad plus reaction chain should be suspended by early next week.

With help from Bob Taylor and Lee Cardenas we have started to clean the various tooling assemblies and to clean and bake the spare parts of the quad suspension.

2nd Structure for Stanford

Lee and I have been preparing the second structure for LASTI. Everything should be ready in good time for Tim's visit, see below.

Quad Noise Prototype

From next week the hosting of the design meetings, on a Monday, will be taken over by RAL. Over the last couple of weeks noise discussions have dominated these meetings.

Installation Fixtures

I now have a set of drawings from Oddvar and a price estimate from Mike Gerfen in CES. The next step is to hold a meeting with Dennis, Ken and Mike to discuss a few aspects prior to starting cutting metal. From Norway, Oddvar has been sending information and drawings to support this effort.

Visits

Norna is visiting on Tuesday to help with the assembly of the quad and to discuss the "flexure point theory". Tim Hayler is visiting from RAL for 10 days from the 10th of October to help with the resonance tests on the second structure and to run through the "3 and 1" assembly procedure.

From: Ken mailand kmailand@ligo.caltech.edu

Chiller flow meter mounting brackets will be complete, and sent to Cheryl at LHO tomorrow 9-29.

I have reviewed transport table detail drawings for Calum.

I did an OMC Algor for Mike Smith, and demonstrated the use of the program to him.

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

The bonding of magnets to flags and holders using indium are failing often. Rework takes a long time because the surface preparation is quite intricate. Also, during cleaning, the nickel plating on the magnets gets affected by the hydrochloric acid solution causing the coating to bubble and separate from the magnet material.

So, I have been investigating the possibility of using Sodium Silicate as binder.

Initial tests are encouraging. I have been looking at different (solution) concentrations and expediting cure by baking.

One of the bonds, the only one I handled after bonding, is strong enough to withstand a manual pulling, this is a good sign since the parts are not flat, at the edges, I can see light between the bonded surfaces.

From: Jay Heefner jay@ligo.caltech.edu

AdL Quad Controls

Modified one channel of the GEO PD amp to try to reduce the number of LED failures. The present design has the anode of the LED tied directly to the +15V supply so that any inadvertant connection of the OSEM head or touching of the pins can cause large currents to flow through the LED. The modified design places a 200 ohm resistor in series with the supply line and limits currents to less than the 75mA max rating of the LED. Other component values in the circuit were also modified to compensate for the addition of the limiting resistor.

System layout and wiring diagrams for the LASTI version of the controls are 90% complete. Completion is pending acceptible performance tests of the PCIX ADC and DAC cards that we received this week.

Jay will be in Birmingham next week for design discussions with our UK partners.

AdL SEI

6 more GS-13 pre-amps have been completed and sent to Stanford. In addition, we fabricated, tested and shipped an amp of our own design for test. If it works we will be able to use these amps instead of buying GEOTECH amps and modifying them.
LASTI ISI controls system diagrams are complete pending successful tests of the PCIX ADC and DAC boards.

LASTI Controls

Cost estimates for the future LASTI controls including SUS, SEI and pondermotive experiments are in progress.

Core Optics

From: Bill Kells <kells@ligo.caltech.edu>

Hiro has completed an independent check calculation of the "full ifo" PI (parametric instability) feedback field. It agrees with what I had calculated. This seems to confirm a significant discrepancy with the original Braginsky/Vyachanin theory expression (which has been always used since, eg, by Blair). We will be trying now to sort this out with Vyachanin.

Also I've been working with Phil on the thermal heat up scenerio for AdL. That is, what is the best strategy for cold opitcs ROC so that they perform reasonably well on the way up to full power.

Pre-Stabilized Laser

From: Peter King pking@ligo.caltech.edu

A couple of quotations for modular in-plant offices and clean rooms were received that would duplicate the setup currently at LLO. Whilst the price of the enclosure has not changed much, associated items such as labor and freight have.

Auxiliary Optics

No report this week.

Other Laboratory R&D

From: Juri Agresti <jagresti@ligo.caltech.edu>

Juri

I worked on the tilt sensitivity of our cavity in order to understand the discrepancy between the theoretical prediction and the real data. The flatness of the input and folding mirror seems to be a crucial issue in understanding the experimental data behavior. Using the actual map of the input mirror (as well as an ideal saddle shape mirror) the results of the FFT simulations are getting closer to the experiment. With this configuration we can explain a factor of 1.5-2 in the tilt sensitivity respect to the perfect flat input case. The analysis with the actual folding map is in progress.

Chiara

I made the calibration for the two accelerometers that I have to use in the measurement of the transfer function of the system and I worked on the electronic set up. I put both the accelerometers on the top plate in order to evaluate the twist mode of the table.

I worked also to prepare the maraging steel wires for the hardening process.

Valerio

I'm still working on the SimMechanics model of the HAM-SAS suspension. Thanks to the help of Virginio Sannibale, we have a better understanding of the simulation tool and we are probably going in the right direction to solve the inconsistencies of the model. We have also contacted Mathworks because we are going to buy three licenses of the blockset. These new licenses will be linked to the existing MATLAB Caltech licenses.

Maria Paola

I spent the last week preparing my presentation and writing my final report. My next and final step is to start thinking about how to control the motor, using RCL filters and FET switches. Initially I just have to test switches connecting them to the coils of the motor and injecting current into the coils through them, and that's what I'm doing now, together with the fix of the whole system, since sometimes something doesn't work anymore and I guess I still have problems of bad connections and soldering. Afterwards, I will try to make the motor work with 2 FET switches in order to have current and then steps in both directions, and eventually I can try to connect an RCL filter and see what happens when the frequency changes.

This is the last week I'm going to spend here in US, and I'm on the whole satisfied of this work, not so much for the results I have achieved, but surely a lot for all the practical things I've learnt to do.
I want to thank Riccardo one more time for his constant help and for his contagious cheerfulness and optimism, and all of you for making this
wonderful holiday unforgivable for me.

Ilaria

I completed simulations of spring box with Ansys and now I’m working on transfer function of the IP. Unfortunately the results Ansys gives me are not in the range I chose, so harmonic frequency does not match the graph. I`m going to send an e-mail to Ansys to solve the problem.

For additional information about this report, contact Stan Whitcomb or Phil Lindquist

Cavity 1. (Location)	Material/Item	Start	End	Comments
Cavity #1 2. (OTF Lab, Bridge)	MMG nickel plated Nd-B-Fe magnets (Helena Armandula, SUS )	~6/8	TBD	No Change Cavity re-alignment is in progress due to power drop and oscillation. ~2 more weeks to completion
Cavity #2 (OTF Lab, Lauritsen)	NA	NA	NA	No Change cavity is close to being ready for samples
Cavity #3 (OTF Lab, Lauritsen)	plan to introduce samples tomorrow: OSEM Flexi-circuit cable, qty ~ 45 (Helena Armandula, SUS) supplied by Univ. Birmingham (Stuart Aston)	~6/10	~9/10	DuPont Flexible Circuits. The whole part to be constructed of 'flexi' i.e. no 'rigid' sections. (Stuart Aston,Univ. of Birmingham, SUS/UK subsystem) - Start Laminate: Kapton (LF8515) (document link: http://www.dupont.com/fcm/products/H-73244.pdf Coverlay (x2): Kapton (LF0110) (document link: http://www.dupont.com/fcm/products/H-73245.pdf DuPont Pyralux Series - Kapton / Acrylic Adhesive system. (document link: http://www.dupont.com/fcm/products/H-73246.pdf -------------------------------------------------------------- OSEM emitter & photodiode 40 of each, (Dennis Coyne, SUS ) Test has been completed. Results to be posted by Liyuan Zhang soon.
Queue Priority 1	2 Cleaned 50ppm transmission mirrors, 1 in dia., REO coated --	TBD	TBD	witness samples for the LHO vertex volume (added in 6/29/2005 vent)
Queue Priority 2	Stepper Motor (Riccardo DeSalvo, possible SUS or ISC use)	TBD	TBD	3. Stepper Motor sample had been placed into Cavity #1: Power dropped from 175 mW to ~25 mW after introducing the stepper motor sample, and continues to decrease. It is very hard to keep cavity locked. The stepper motor may have contaminated the mirrors. Will re-test when a cvity becomes available again. 4. To be rebaked soon using the self-heating capability of the stepper motor (not just the oven heater controls)