The LIGO Executive Committee Agenda for Monday, July 2, 2007 will be:
(Meeting time: 10:30 am Pacific Time)
1. Announcements
2. Programmatic (Marx)
NOTE: This will be REUGLAR Executive Committee Meeting, but it will be focused on the Continuing Operations Budget (FY 2009 – FY 2013) and proposed Staffing Levels. Please use the regular call-in number distrbiuted to the executive committee via the regular email reminder.
- Report on end-of-run planning (F. Raab)
- Continuation of last week's Operations renewal proposal budget discussion (P. Lindquist)
3. Comments on Weekly Report
4. LSC and Data Analysis (Reitze)
5. LIGO Lab Operations
- Administration (Lindquist)
- Sites (Raab, Giaime, Shoemaker)
- Commissioning (Fritschel)
- Optical and Mechanical (Coyne)
- Control and Data Systems (Bork)
- 40m (Weinstein)
- TNI (Libbrecht)
- LASTI (Mittleman)
- Lab computing (Anderson
)
- Data Analysis Group (Weinstein)
- Instrument Science (Gustafson)
- Science Group (Weinstein)
6. Enhancements (Zucker)
7. Advanced LIGO (Shoemaker)
8. Change Control Board/Technical Review Board Session as needed
- There are no open change requests
Site and other Business Issues:
Special Items:
Special Announcements:
Weekly Report Highlights
LSC Issues (Reitze)
No report. Reitze is traveling.
LIGO Laboratory Administration (Lindquist)
PROPERTY MANAGEMENT (Luna)
>From: Rod Luna <rluna@ligo.caltech.edu>
- No report (Rod is on leave). Cleaveland is substituting.
- Made arrangements for shipment of a "Scatterometer" from Stanford University to a repair shop in Portland, and from there, it will ship to Caltech where it will be placed in Rana's lab and used for about a year to measure scattered light from the LIGO mirrors.
- Assisted in packaging and shipping of some optical sensor and force actuator units to the Australian National University.
DOCUMENT CONTROL CENTER (Turner, Mak)
>From: Cleveland Mak <mak_c@ligo.caltech.edu>
- Scanning Update - Progress continues on the scanning of all non-electronic "G" category documents.
FINANCIAL SYSTEMS (Funaro, Brambila, Kaufman)
>From: "Funaro, Catherine" <Catherine.Funaro@caltech.edu>
>From: "Brambila, Ruth" <Ruth.Brambila@caltech.edu>
>From: Florence Kaufman <fkaufman>
- Worked on updating monthly reports for June.
- Attended a meeting regarding set-up of AdLIGO accounts with Phil Lindquist, Carol Wilkinson, Alice Salazar and Ann Margaret Chrisney.
- 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>
- Completed a seminar on Competitive Negotiations and Source Selection held in Washington, D.C.
>From: Ed Jasnow <jasnow@ligo.caltech.edu>
- Ed Jasnow and Criselda Rodriguez-Brodeur conducted P-Card and TechMart training for members of the LLO staff.
PROPOSALS and REPORTS (Lindquist)
We met Monday to review the proposed staffing levels for LIGO Continuing Operations. We decided that it is necessary to integrate the Continuing Operations plan and the Advanced LIGO plan more tightly, and Carol and I have been working on that this week. The review of staffing levels will continue this next Monday based upon those results.
HUMAN RESOURCES (Akutagawa)
>From: Cindy Akutagawa <cindy@ligo.caltech.edu>
- The next Staffing Committee meeting is scheduled for July 16.
- A Staffing Committee meeting was held on June 18th. The minutes and action items have been posted on the SC web page.
- All files for the Staffing Committee are up-to-date and posted on the SC web page.
- Prepared numerous appointment and reappointment memos for various Visitors, Post Docs, and Term Staff.
- Processed time sheets and submitted to payroll.
Quality/Safety (Tyler)
>From: Bill Tyler tyler@ligo.caltech.edu
Nothing significant to report this week.
LIGO
Hanford
Observatory (LHO) and Interferometer Operations (Raab)
Summary of S5 Activities at LIGO Hanford Observatory (compiled by M. Landry)
The H1 ran for the week with a lowered duty cycle of 79%, impacted by investigation work on the problematic H2 IFO. Ranges were typical, 15-16Mpc. H2 however was only in science mode 55% of the time, with a reduced range hovering around 3-4Mpc for much of the week, kept low by f^{-5/2} noise. Many obvious potential problems have been checked and dismissed, e.g. docking ISCT10 is not the problem, pendulum modes suggest the optic is not hung up (although some argue this is not conclusive - more measurements here), a water cooling passage on the PSL was cleared but the noise remained, the FSS and ISS were deemed innocent, etc. Many IOCs were rebooted. The PSL was assessed and nothing extraordinary was found, and 2k suspensions checked out fine.
Some our standard S5 summaries are linked here: Tuesday maintenance, CDS maintenance, latest range & duty cycle compilation
LIGO
Livingston
Observatory (LLO) and Interferometer Operations (Giaime)
S5 run (Igor Yakushin):
- We spent 10 hours on Tuesday and 9 hours on Wednesday on commissioning:
- DC readout measurements;
- Channel changes: 7 channels added, 1 removed;
- Scattering experiments at X-end.
- Inspiral range was around 14Mpc most of the week except for today: we have not yet fully recovered after yesterday's commissioning and there will be couple hours more used today. Duty cycle for this week is 70%.
CDS Computing (Lisa Bogue):
- Continued working on advLigo CDS security plan.
- Helped recover from a power outage.
- Ordered a computer from penguin computing as a testbed box for running borkspace (i.e., simulink front end code generation system).
- Made channel changes in the frame builder to support Valery's IFO measurements.
LLO Outreach (John Thacker):
- Prepared and delivered programs for 3 MSP teacher professional development groups.
- Update to LIGO SEC Web page.
- Update to LIGoOp Web page.
- Provided tour for LSU students.
LIGO computing and network security (Roddy)
--------------------------------------------------------------------
Reported under General Computing, see below
General computing and LDAS admin (Giardina)
---------------------------------------------------------------------
Reported under General Computing, see below
Reported under LDAS System Administration, see below
Data analysis & computing (Yakushin)
---------------------------------------------------------------------
Storage/Condor/LDAS admin:
Reported under LDAS System Administration, see below
Data analysis:
Reported under Data Analysis activities, see below
Mechanical and Optical Systems (Coyne)
See Advanced LIGO
Controls and Data Systems (Bork)
See Advanced LIGO
40-Meter Interferometer (Weinstein)
- Surf students Sonia Buckly, Alice Wang, Keenan Pepper and Josh Weiner were fully trained for all safety aspects of the 40m lab.
- All the SURF students are busily at work on their tasks, and have written first progress reports.
- Surf student Edward Macauley has arrived to work with Bob on the new FTIR machine. He'll get all the usual lab and laser safety trainings.
- After checking the alignment and noting all the reference oplevs and initial pointing, we turned off the in-vac PZTs and vented the 40m on Monday. A crew led by Tobin (including Darcy, Josh, Nick Smith, Rana, and Steve) took some closeup pics on the ETMs, applied light blasts of compressed nitrogen from a deionizer, carefully drag-wiped them (removing all of the dust particles visible by eye), and took more picks. They sealed up on Wednesday and pumped down (slower than usual to avoid steering up dust) by the end of the day.
- Tobin then repeated last week's pre-vent arm cavity loss measurements. It appears that the y arm is unchanged but the x arm shows a significant improvement. x arm: 216 ppm -> 152 ppm (significant improvement); y arm: 176 ppm -> 173 ppm (no change).
- Rana says:
"It's strange that there was an asymmetric change but dust knows no logic. One possibility is that the ETMX happened to have a large particle right in the middle of the optic where the beam goes. Very roughly we might expect that to lose in power we would need a particle with diameter ~ 0.05-0.1 mm, of which there were many."
- Josh took some pictures of the ETM's the Friday before the drag-wiping using the frame grabber on the CCD video feeds, and then took after-photos on Wednesday of this week (6/27). The changes in the pictures seem to agree with Tobin's before-and-after measurements. The ETMX camera showed a noticeable reduction in the scattering off of ETMX whereas the ETMY images were not as different when inspected visually.
- Ben reports that the new in-vac electronics for the DCPD has been delivered.
Thermal Noise Interferometer (Black)
- This week we have some good news from LMA. They appear to have coated our first mirror successfully and annealed it without seeing any bubbles. Keep your fingers crossed for the other three.
LASTI (Mittleman)
BSC-ISI
- We received the first shipment of the large BSC-ISI plates, the two stage zero plates and the optics table. At this point we have run into a small problem. The plates all use dowel pins for alignment. Some of these pins were in blind holes, so they needed to be removed for cleaning and replaced with vented hardware. When removing the pins Galli and Morelli (the cleaners) damaged the holes, we are trying to repair them now. Hugh Radkins is visiting from Hanford and helping out.
Quad-Cavity Work
CIT Science Group (Weinstein)
____________
Kent Blackburn:
OSG APPLICATION DEVELOPMENT
- Version 3 H(t) Frame data analysis on ldas-grid:
- install head vesion of Glue, Lal, Lalapps on ldas-pcdev2
- modify ini file to use V3_L2 compressed data
- generate dax files with V3 data for testing
- generate dag files with V3 data for testing
- test V3 WFs for run-time on ldas-grid
- Version 3 H(t) Frame data analysis on OSG:
- V3 data not available via RLS yet
- waiting for Stuart Anderson to pin V3 data to disk
- waiting for V3 data to be available to Tier 2 sites like PSU
- generate dag files with V3 data for testing
- Continued Version 2 H(t) Frame testing on OSG.
- Wrote agenda for weekly LIGO-Pegasus telecon.
- Attend weekly DASWG and LIGO-Pegasus telecon.
OSG INTEGRATION TESTBED
- Attended Caltech Orientation.
- Attended Virtual Data Toolkit (VDT) Meeting. Next release of the VDT has been delayed by one week due to issues within VOMS and GUMS which are now resolved and as a result of the delayed release of GLOBUS.
- Attend PEGASUS and DASWG telecons.
- Developed understanding of Grid Certificates: setup Multiple Grid CA, switch default CA; request/sign host/client Certificates.
- Developed understanding of Grid Services: setup GridFTP, MyProxy Server, WebMDS, etc.
- Reading Condor User Manual 6.8.5.
- Obtained admin password of osg-itb from Kent; Remove osg-itb old non-functional GANGLIA, install GANGLIA 3.0.3 on all osg-itb servers, configure ganglia use "unicast" instead "multicast".
- Currently auditing osg-itb SSH access, revoke non used ssh access.
OSG MANAGEMENT
- Worked with organizing committee for the OSG users and applications committee to provide presentation time slots for LIGO and for PEGASUS.
- Continued working on Year 2 planning.
____________
Igor Yakushin
____________
- Alan and Duncan have been busy with Inspiral reviews, especially the GRB analysis. Lisa, Laura, and Stefan have been busy with the ringdown review.
Laboratory Computing (Anderson)
LDAS Software Systems (Maros)
- The diskcacheAPI has been stabilized with modifications to the TCL interpreter. This allowed for testing of hung file systems. This testing has revealed a short coming in the handling of hung NFS file systems. It has been estimated at a week to remedy this condition.
- Modified the cleanup of the createRDS test to remove files based on the output directory option and the usertype option.
- Code has been added to the diskcacheAPI allowing changes to the variable ::CACHE_WRITE_DELAY_SECS to take effect immediately. Also, user commands that queried the disk cache when it was empty now return the message "no frame files found".
- The commands concatFrameData, getFrameData and getFrameElements executed by frtest.tcl now use S5 frame files. The test script conditionData.cmd has also been updated to use S5 frames when submitted from cmonClient. The diskcache logs parsing script to remove grep for RUNNING as this is already included in the "error" grep pattern. Parsing of diskcache.log for successful and failed retries has been added.
LDAS System Administration (Anderson)
Caltech
(Dan Kozak)
- Got most of our LDR customers to increase their gridftp timeout.
- Spent much time on truly bizarre problem that prevented PSU from getting data from CIT (lsof would report the file that it was looking for with a .tmp extension, even tho' no such file existed and the non-.tmp version was really what it wanted, then it wouldn't stage).
- Created chart of 6140 test results, did more tests.
- Did H1 & L1 h(t) work: FrCheck and md5sum of files on nodes, copied them to /archive/frames, published them into LDR. Work continues on the same for H2.
- Hacked publishing scripts to run md5sum on morbo.
- Talked to user mito about L0 usage again (had him crank back to 3 jobs to free up some tape drives).
- Wrote up instructions for weekly tape ingest for when I was out.
- Met with Scott Koranda, Ben Johnson & Stuart vis a vis future LDR plans.
- Submitted morbo crash info to Sun, haven't gotten a response (following up today).
- Dealt with fallout from dataserver-cit "crash" (as it turns out, probably just really overwhelmed with work).
- Started doing individual samfsdumps for user's home directories that have been moved to ZFS.
(Phil Ehrens)
- Large number of grid certificate related tasks.
- Ongoing work with MOU webforms. Added DCC number cookie support to wiki. Updated documentation and page link connectivity. Changed edit page mode to use new window and to return to history(-2). Many other small changes.
- Assisted in initial diagnosis of network problems arising on 06/26.
(Erik Espinoza)
- Troubleshooting GC network issues w/ Larry.
- Detected and removed rogue access point.
- Upgraded kernel on nodes for NFS fixes.
- Backported nfs-utils from CentOS 5 to FC4.
- Migrated users to split home dirs, qfs/zfs.
- Built internal yum repository.
- RAID Disk offline on node47, rebuilt RAID in place.
- Participated in OS Committee.
- Worked with Stuart to execute Sun Diagnostic tests on file server.
- Closed ticket #65515148 w/ Sun - x4600M2/RAID issues.
- Fixed pam_keyinit bug in new openssh package I built.
MIT
(Fred Donovan)
- Internal (beta) web site (gar.mit.edu) monitors disk status for nodes 1-62 via smartmon data incorporated into ganglia host metrics gmond installed on pcraids, data1-data12 (less data3,5,6,7) (separate gmond cluster group (mit-pcraids)) query metrics for nodes from ldas-gridmoni, for pcraids from data12. php parse scripts for web interface.Internal (beta) web site (gar.mit.edu) monitors disk status for nodes 1-62 via smartmon data incorporated into ganglia host metrics gmond installed on pcraids, data1-data12 (less data3,5,6,7) (separate gmond cluster group (mit-pcraids)) query metrics for nodes from ldas-gridmoni, for pcraids from data12. php parse scripts for web interface.
Livingston
(Igor Yakushin)
- Debugged and committed to CVS the new version of segpagegen script that includes GEO science segments and STATEVEC.5.12 which is a good approximation to Virgo's science segments (science segments with some category 2 DQ flags applied).
- Modified the replication monitor script to monitor replication from CIT to the sites relying on Virgo frames: http://ldas.ligo-la.caltech.edu/ldas_outgoing/archiver/Status_Pages/SEGMENT_REPLICATION
- Filled the gaps in segment database for LLO's and LHO's LFNs and the corresponding state vector segments including Science.
(Dwayne Giardina)
- Tape eject for shipment to CIT.
- libframe upgrade.
- Moved one tape robot power supply to the second UPS.
Hanford
(Ben Johnson)
- Added the 6 Columbia University users to the cluster.
- Went to Caltech for two days to meet with Scott Koranda and the LDAS admins/developers.
- Working on OpenSSL+LDAP interface for a general NDS server (to be tested with the LDAS NDS server first).
General Computing (Wallace)
MIT
(Fred)
- Continuing move preps (ip addresses, new subnet, wireless, etc.).
- More ilog crash/burn testing.
- Setting up new LASTI computer.
- Notebook issues (boot, graphics, etc).
- Misc. purchasing.
- Uusual troubleshooting, user issues.
Livingston
(Dwayne)
- Additional configuration to a couple of the SEC laptops.
- Rebuilt a PC to use in the conference room for presentations.
- Replaced the operator PC, the old one is still available for a couple weeks.
- More work with the SEC AC controls laptop.
- CUR cleanup.
- Usual user support requests.
- Cleared spam trap.
(Shannon)
- Evaluating the Solaris Security Toolkit for use in LIGO. Will prepare a presentation on it over the coming weeks. Seems to be comprehensive. Will test later on a production server after careful edits.
- Evaluating some scheduling and tracking software for port scans. It has a perl error presently, submitted bug report.
- Still working through isues on the ligo.org web authentication. Still not working with the apache module. Working with Tyler, et al. on this. May have to set up a temporary test server. Not sure if it is a Ubuntu problem or a kerberos/apache problem at this point.
- Worked on some visio drawings & docs for upcoming syslog stuff.
- Helped Larry, Mike, et al. with a network issue at CIT. Interesting plots as a result of that.
- Going through 8 years of cruft and trying to organize & delete duplicate files, documents, etc. This is going to take some time...
- Still working the bug introduced by a Solaris patch from 2 1/2 weeks ago.
- Working with Foundry on a quote for the core switch. Discovered yesterday that pricing will change soon (up 25%), so time is of the essence.
- Ordered a laptop for Brian.
Hanford
(Christine)
- Finished building a Fedora Core 5 laptop for the loaner pool.
- Worked with Gina Salone and Doug Akers of PNNL to resolve a problem with the contract and payments for the GigE network transport between Richland and Seattle.
- Investigated replacements for fortress, the LSC sandbox.
- Set up three more Ultra 25s in the Computer User room.
- Continued moving home directories to the new disks.
CIT
(Mike)
- Worked on some licensing issues regarding SolidWorks. I ended up reloading a few workstations with the correct SW licenses.
- Loaded a SolidWorks workstation for Calum Torrie, and set this up his cubicle.
- Working with our group tracking down many networking issues that were caused by a bad switch. I have unplug some wireless AP’s that may need to be reconfigured. I also replaced some RJ45’s connectors on active network cables that were having connectivity issues.
- Other misc. user support and sysadmin tasks.
(Christian)
- Configured 2 systems with Mathematica and Mathlab for new Surf Students.
- Diego Fazi- Created ghost image of Diego¹s compromise system. Shannon will be looking at the image to analyze the problem.
- Helped Larry and Mike resolved network issues.
- Re-imaged laptops that were returned to the loaner pull this week.
- I did an inventory on printing supplies.
- Continue working with the installation on WSUS clients for LIGO users.
- Minor tweaks on the unit in the display case.
- Other misc.: Continued onsite software/phone support.
(Veronica)
- LSC: Ongoing support of the upcoming meeting. Addressed a cybersecurity issue; A security audit by the provider has shown no indication that the information has been compromised. The interface remains disabled at the moment, pending an ok from David Shoemaker. Other LSC web updates; updates of the database of technical papers.
- LIGO: Addressed an issue of copyright ownership per a request from National Geographic Video Productions. Misc. web updates.
(Larry)
- Worked a number of purchases. Updated a couple of maintenance contracts. Purchased misc. items for the different groups. Presently, trying to go through the items purchased over the last 4 years that need the new justification memo filled out. The old form is no longer sufficient.
- Working with Marie W. and Fred D. on the logistics of the LSC meeting. Starting working out logistics for the all hands meeting broadcast.
- Installed the new DNS unit.
- Setup a number of new user accounts.
- Working on some documentation to add on to the AUP.
- Spent time troubleshooting a ARP loop problem we had on the network. It took a couple of days to get everything cleared up and worked out. Presently, doing some wrap-up work on that issue.
- Assisting Rod in getting equipment removed.
- Working with the PSU group on getting some changes made for the ligo.org system.
Advanced LIGO and Supporting R&D (Shoemaker)
Advanced LIGO Systems
Modeling and Simulation
From: Hiroaki Yamamoto hiro@ligo.caltech.edu
e2e weekly meeting
- Mark Barton explained about the development of his suspension model to port for the new version of Mathematica 6. Next week, he is going to explain the improvement of his model, including the violin modes. One of Sany's student is trying to install this model at SLU, and he asked Mark some questions about the installation.
Static IFO simulation (Hiro)
- Couple cavity code is improved to make it easier and better to handle the signal generation and to customize the recycling cavity setup, like stable cavity option.
- After discussing physics at the tomorrow's RC geometry meeting, quantitative studies of the coupled cavity system (simplified AdvLIGO system) will start.
Modeler : e2e simulation engine and ALFI : e2e front end (Hiro, Bruce, Melody)
- UserDefinedPrimitive (mex file for matlab) More sample codes are written to understand necessary modifications. Documentations are being written which cover the end user level implementation and the details for the programmers.
- A new version of e2e, 3.2.4, was released. This includes a modification of the triangular cavity for the mode cleaner simulation so that the frequency servo can be implemented. The previous release has some issue under certain conditions. This module was validated by Sany by comparing the response to the frequency modulation and mirror position modulation.
Mechanical Simulation for advanced LIGO (Sany and SLU team)
- Yoshida: Continued e2e modeling of AdvLIGO Mode Cleaner locking. Early in the week a problem was found in the three-mirror cavity model and Hiro fixed it. The problem of the phase margin of the total open loop transfer function (MC length servo plus frequency servo) has been identified and being fixed. Has found that the MC length gain at the low frequency is too low, and currently working on it.
- Douglas Carpenter: I figured out that the problem with modeler I was having last week was due to the simulation time. The time period I was running the simulation for was too short to clearly see a difference between the poles. After increasing the time period the differences became clear. Currently I am rebuilding/upgrading modeler to the latest version (3.2.4).
- Satish: Sunday - Today I am going back through the whole method that i was using. Now my program is functioning well (without any dimension problems) and I'm getting a clear graphs. However, I am still getting the 61 Hz pick, which I am supposed to get rid of after running the program. I will continue working with my program until I get the desired result.
Week Summery - This week was pretty progressive. I got some new results that i could compare with actual LIGO data. I solved the problem that i had last week- two peaks at 60 and 61 Hz. I've gotten rid of 61 Hz . I am trying to make my graph more similar to the actual graph from LIGO.
- Christopher Hill: This week I have continued my work on figuring out phase shifts for my cavity. I recently figured out phase shifts mu be imputed by a decimal figure.
- Richard - Been working on the problems with the new models regarding violin mode simulation (based on Mark Barton's mathematica model).
- John Gaffney - With the help of the NI engineers I was able to write a Labview program that'll collect data from the 60hz Antenna for longer periods of time. Spent the next days refining the program, adding some more options to it and working with the data gathered.
CDS Prestabilized Laser
From: Peter King <pking@ligo.caltech.edu>
- No substantial progress was made with the Beckhoff Automation hardware. I can see the terminals attached to the touch panel but haven't been able to input/output any data from them, even from a very simple program. I have not been able to resolve where the touch panel gets its EtherCAT address from.
- In preparation for the infrastructure and safety review I have made some minor changes to the hazard analysis and the safety plan.
- The SOP for firing up the InnoLight 2-W NPRO has been approved pending one or two hardware modifications relating to the illuminated warning sign. It will be changed such that if the illuminated warning sign fails, the laser will shutdown.
Control and Data Systems
From: Rolf Bork rolf@ligo.caltech.edu
LIGO
- LHO reported problems with Framebuilders when someone in the control room would ask for second trend data from DMT channels (they do not exist). This happened a couple of times in the last week. Alex fixed the Network Data Server (NDS) software to reject these bad requests and return an error message. This code was installed and tested today at LHO FB0 and reports from Barker are that the fix is working.
AdL SUS Noise Prototype
- The layout and redesign of the UIM coil Driver and monitor boards is complete and has been sent back to the UK for review and manufacture.
- Design of the Top coil driver has been started by the UK. The design is almost ready for manufacture.
- PUM driver design has not been started.
- Sat amp testing is under way.
- Preliminary design of the noise prototype system and rack wiring is complete.
- Design of the whitening and interface boards has been started.
- Testing of AA and AI boards for installation will be started next week.
OMC Suspension
- The test system is installed and operational.
- Procurement issues once again are plaguing production of the AA and AI boards needed for ELIGO.
Tip-Tilt equipment for ANU
- The equipment has been shipped to ANU.
ISI
- The LASTI two-stage ISI electronics have been delivered, installed, and tested. All that remains is to deliver four of the specialized STS-2 cables. Paul is almost finished making them in the back shop. My thanks go out to Jay, Russel, Alex, Rolf, Richard, and the people at LASTI that helped install the system.
Single Stage ISI
- One SS-ISI is needed at HPD in August. Shortly thereafter another system, and that one, will be delivered, one to each site. In order to deliver these systems, the following work is being done:
- SS-ISI Interface - (4 + 2) I am currently re-designing the ISI interface to be useful, also, as a Single Stage Interface.
- Coil Driver - (4 + 2) (Mohana) - The Coil Driver chassis have been requested. ADC Interface Rev7 (4 + 2) - The filters have been requested, and the front panels and interface boards will be designed soon.
- AI Interface boards (2 + 2) - The filter boards have been requested.
- Binary I/O Interface Boards (4 + 2) - May need re-design, will be evaluated soon.
Seismic Isolation
From: Ken Mason kmason@ligo.mit.edu
BSC Seismic Isolation Assembly and Test
- The stage 0 plates and one of the optical table plates have been delivered to MIT by Arland Tool. Several more plates will be delivered on Friday. Galli & Morelli did not send back our eye hooks, dowel pins, and mirro-stat. This caused several days delay as we ordered, cleaned, and installed these parts.
- Hugh Radkins is at MIT assisting in the stage 0 assembly. He is working with Stephany reviewing the assembly procedures. The test stand, scaffolding, and granite table has been cleaned and covered.
HAM Single Stage Isolation Design and Build
- PSI has delivered to us the design of the new actuators. The solid model was forwarded to HPD to finalize the mounts.
- The SmCo magnets on order. Estimated date of completion for magnets including Nickel plating 1 August 2007. Estimated date for completion of field assemblies 21 August.
- The Steel field assembly plates on order. Estimated date of completion including Nickel plating 1 August 2007.
- The Aluminum bobbins on order. Estimated date of completion including Sulfuric acid anodize 1 August 2007. Estimated dates for bobbin winding 20-31 August.
- The Polyimide resin was purchased and received, currently in PSI storage at Slidell, LA office.
- The tooling design for bobbin winding in process. Bobbin winding hardware and controller scheduled for purchase 1st week of July.
- PSI is currently working on fabrication and assembly drawings. Release of fabrication and manufacture drawings to LIGO is 1st week of July.
- The Tracon Epoxy on order for testing terminal post potting and soldering.
- The Bobbin mag wire on order.
- Silver plated hardware scheduled for purchase 1st week of July.
- Review and update of bobbin winding procedures scheduled for 1st week of July.
- HPD has place on order the (3) large plates and the inner wall plates. Dynamic Metals had trouble forging the billet to be used for maraging steel blades and has had to scrap it. The next available billet is expected August 17th. The EDM shop then needs 6-8 weeks for heat treating and machining. We and HPD are looking for other options.
- Andy Stein has completed checking 38 drawings giving priority to long lead items.
From: Ben Abbott abbott_b@ligo.caltech.edu
40m: DCPD
- The In-vac electronics for the DCPD has been delivered.
ISI:
- Refer to CDS report, above.
Single Stage ISI:
- One SS-ISI is needed at HPD in August. Shortly thereafter another system, and that one, will be delivered, one to each site. In order to deliver these systems, the following work is being done.
- SS-ISI Interface - (4 + 2) I am currently re-designing the ISI interface to be useful, also, as a Single Stage Interface.
- Coil Driver - (4 + 2) (Mohana) - The Coil Driver chassis have been requested.
- ADC Interface Rev7 (4 + 2) - The filters have been requested, and the front panels and interface boards will be designed soon.
- AI Interface boards (2 + 2) - The filter boards have been requested.
- Binary I/O Interface Boards (4 + 2) - May need re-design, will be evaluated soon.
Suspensions
From: "Greenhalgh, RJS \(Justin\)" <J.Greenhalgh@rl.ac.uk>
- RAL: nearly all parts for assembly at Caltech have been dispatched and it has been agreed to start work there on 9th July. We aim to be ready to integrate the structure to the ISI during the week of 23rd July.
- Glasgow: The first PM still expected at end of June. Bonding of ears for PM and test mass can take place between early July and the 25th September, which is a hard cutoff date for Sheila Rowan. Continuing troubles with pulling consistent ribbons have lead to a rethink on the date for shipping the welding machine to LASTI – this will be firmed up once some initial ideas for fixing the problems have been implemented. The ear bonding jig as redesigned has been made by rapid prototyping and is also being made by conventional means. The rapid version will be used for tests and discussions with Helena Armandula if the metal version does not arrive in time. The profiler and bounce/proof tester are being made. A ribbon storage solution has been found.
- Birmingham/Strathclyde: Work continues on OSEM assembly. The electronics is progressing and some parts are nearly ready to deliver. However, the serial nature of the work means that some sections (the drivers for the PM) have only recently reached agreed requirements specifications.
- Overall: The target is to start clean assembly at LASTI on 9 July and to be ready to integrate the suspension to the ISI towards the end of July. Agreement has been reached to start work towards some major procurements.
From: Norna Robertson <nroberts@ligo.caltech.edu>
Calum Torrie is visiting Caltech for ~ 3 weeks, working on several aspects of the OMC and RM suspensions - welcome Calum.
OMC suspension work:
- Transfer functions and measurement of rigid body frequencies have been carried out by Nick Smith (visiting from MIT) and SURF student Alejandro Campos. Comparison has been made to the MATLAB model and results posted on OMC wiki. In general there is good agreement and the bottom line is everything is behaving as expected and the values of the mode frequencies satisfy requirements. There is ongoing work on checking the as-built assembly and updating the model with minor amendments which we expect will make agreement between measured and predicted frequencies even closer. The frequencies lie between ~0.5 Hz (lowest yaw mode) and ~6.7 Hz (highest roll mode.)
- Damping in all degrees of freedom using the "GEO active" filter design (combination of high pass, low pass and two transitional differentiators) has also been successfully tested -results to be posted soon.
- A problem with shorting within the cables to the OSEMS occurred this week. It has been diagnosed and new cables will be produced to replace them.
- Other work ongoing on the OMC suspension includes the production of a second metal bench with new design of attachment of suspension wires which will be the same as what is now planned for use with the silica bench. This metal bench should be ready for testing before the silica bench is installed.
- 4 OSEMs for use in testing the tip-tilt mirrors which ANU are developing as part of the OMC system have been sent to ANU.
Recycling mirror suspension design:
- Bob Kirsner and Greer Scarborough are continuing to do detailed design work on the suspension elements and structure respectively with input from Calum. In particular the mass budget is currently being looked at. Meeting the budget while achieving a first structural resonance of 150 Hz will be challenging.
Beamsplitter suspension design:
- Work on updating the conceptual design assuming the final stage suspension is on steel wires is now ongoing.
- Adv LIGO SUS schedule was updated this week (Janeen and Norna with input from Jay).
- The Enhanced LIGO review report was finalised and sent to LIGO management.
- Norna participated in the monthly Adv LIGO UK project management telecon
From: k mailand kmailand@ligo.caltech.edu
- I working on a faraday 4 wire dampened suspension for Mike Smith.
Core Optic
From: Bill Kells kells@ligo.caltech.edu
- This week mostly devoted to digesting recent data (especially digital images) of beam scattering from HR surfaces. The peculiarities of commercial camera CCD images have had to be unraveled to glean true Physics from these images. This should guide any future round of this (LHO, post S5, 40m). The results are not nearly as clean as could have been hoped for, but there are important conclusion. My immediate effort is to get this all into a coherent talk for Amaldi 7 (will be a G note at first).
From: Liyuan Zhang <zhang_l@ligo.caltech.edu>
- Four scatter scans of 10 x 10 mm^2 have been done at the center part of the LASTI LEM-1 HR side with the integrating sphere set-up. All of them show a 'micro roughness' peak at 8~9 ppm, indicating a good uniformity, and some high point scatters. Comparing to other mirrors, this result is pretty close to that of the good LIGO I mirrors, like 2ITM04 and 4ITM07. We are going to measure the HR absorption, transmission and AR reflection etc.
Auxiliary Optics
From: Michael Smith smith@ligo.caltech.edu
SLC
- P. Fritschel and Mike revised the SLC Design requirements doc. Dennis will provide the HEPI motion requirements for the BSC chambers. The elliptical baffle and arm cavity baffle will be mounted to the HEPI stage. The scattered light noise from these two baffles will be recalculated with the larger motion of the HEPI stage.
- Dan Riley is making great progress on developing the back-scatter BRDF measuring apparatus. Preliminary measurements of the back-scatter from a dirty black glass sample at Brewster's angle indicate a BRDF of approx 3 E-5 sr^-1. Parts are being ordered and fabricated for the mirror with a hole to pass the beam and reflect the back-scattered light to the photodetector.
Input Optics
From: David tanner@phys.ufl.edu
UF Weekly
- Guido Mueller: Working on a more generalized approach to unfold the connection between higher order modes generated inside the arm cavities and the recycling cavity geometry to understand the impact in for example parametric instabilities or alignment sensing signals.
- Antonio Lucianetti and Muzammil Arain: In-air measurements of beam profiles have been made at low power and 30 W for the calculation of the thermal lens in TGG and DKDP. Analysis is in progress.
- All: Orders for ELIGO in-vacuum non-suspended mirrors (2 inch diameter), high reflectance, various angles are being placed. Orders for DLC mounts and for waveplates have been made as well.
For additional information about this report, contact Albert Lazzarini or Phil Lindquist