• TAC_Meeting-Jan_10

Suggestions from last year from the TAC:

• Mode scans
• think about MCL acq. in light of the green locking

Jan10-Slides.pdf

January 28th, 2010
9:30 AM Pacific time
Call in instructions:
(866) 380 - 5536
International: (816) 249 - 4731
Code: 6263958709

I. Agenda

1. Current Status / Recent Work B. Upgrade Plans

II. Recent Status

1. Personnel Changes
   1. Yoichi Aso: 6/08 - 5/09 (gone to U. Tokyo)
   2. Koji Arai: 7/09 - 7/2051
   3. Kiwamu Izumi: 10/2009 - 10/2011
   4. Rob Ward: 1/2004 - 3/2010 (gone to Paris - APC / Barsuglia)
2. DRFPMI results

III. Upgrade

1. Purpose of the upgrade
   1. AdvLIGO LSC / AdVLIGO testbed (green/CDS)
   2. Advanced techniques
2. Current status of the upgrade preparation
   1. Optics
      • Done: Have the SRM / ITMs (dichroic). PRMs polished - coating waits for arm loss measurement
      • Done: optical layout
        • Decision made to use 11/55 MHz instead of 9/45 MHz: easier layout
        • MMT design (Jenne): histograms, alignment orthogonality

        • Optics - Gooch & Housego magic HR

      • In progress: ETMs are designed - quote is in process
      • To be done: ordering smaller optics: folding mirrors, aux. locking, etc.
   2. Mechanics -
      • Done: SOSs for new, light test masses
      • Done: TT suspensions for PRC/SRC
        • ANU tip/tilt: LLO Blades + TAMA/ANU compliant eddy current damping
      • To be done: Supplimental parts for TTs, some in-vac mechanics
   3. Electronics (RF system)
      • Done: Designed the multiple frequency RF system to preserve the phase noise performance of the oscillator
        • RF signal distribution (oscillators, splitters, amplifiers, etc.)
        • Triple-Resonant EOM (New Focus KTP + resonant circuit)
      • Done: Placed the order. Received most of the delivery.
      • To be done: Actual modifications of the PDs/Modules
   4. CDS -
      • Done: Demonstrated the control system of one suspension including the cavity lock.
        • Layout diagram
        • All ADCs, DACs, BOs, IO Chassis, computers, fibers, in house.
        • Adapter boards still being packaged
      • To be done: Integration of the system
        • Integration of cards-chassis-backplanes-cpus ongoing and tricky.
        • Coding for the inter process functions (i.e. LSC, ASC, etc)
   5. Green beam injection (unstabilized fiber + green injection from the ends)
3. Upgrade Plans
   1. upgrading order and rough schedule

IV. End

CDS-diagram.pdf CDS-diagram.graffle

09/Oct ALIGO ISC meeting material https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/Plan/

10/Jan upgrade status (weekly meeting material) 100106_upgrade09.pdf