Differences between revisions 18 and 34 (spanning 16 versions)
⇤ ← Revision 18 as of 2016-05-26 15:26:29 →
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Editor: MarkBarton
Comment:
← Revision 34 as of 2016-07-01 13:11:54 → ⇥
Size: 2400
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
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  * Fabian prepared a work space in the ATC cleanroom and moved in nearly all the parts for the dummy BS, RM, IM and IRM.
  * Fabian finally got perfect agreement between the Mathematica and Matlab models of the BS. (The wire thicknesses had in µm instead of mm, leading to some modes off by 1E3.)
  * Hirata-san remeasured the BF for the BS. He noted that the cap went on and came off easily (unlike some other filters).
  * Hirata-san worked on final details of the Mirapro order for the assembly frame.
  * Hirata-san and Takahashi-san washed a large batch of parts.
  * Tatsumi-san will glue flags, sapphire primary prisms and metal secondary prisms to the dummy BS some time in the week of 6/8. Fabian and possibly Mark and/or Hirata-san will travel to KEK to help and observe.
  * Mark worked more on [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235|E1504235 BS Assembly Procedure]] ([[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|Draft on OneDrive]])		   * Mark and Fabian worked at Kamioka with Fujii-san:
   * We attempted to measure the tilt sensitivity of the accelerometers by adding shims under the legs but gave up when we discovered that picking up and putting down the accelerometer perturbs the zero point even without shims. We will probably need a special tilt stage to do this properly.
   * We took some frequency and Q measurements. The results were amplitude dependent. Joris thinks that this is due to not operating the accelerometers close enough to zero DC output.
   * We set up for a test of the geophone noise. One geophone is reading half the output of the others - one of the adapter cables is broken.
  * Hirata-san:
   * Received extra compensation masses and washed them.
   * Received PI guides, assembled them and shipped them to Kamioka.
   * Received backup set of pillar for security structure (with M10 instead of M12 holes at top).
   * Removed adhesive from base of BS flags in preparation for regluing.
   * Did assembly drawings for cable clamps and other add-on parts for BF and SF.
 * Type B ongoing issues
  * Wires
   * Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco.
  * OSEMs
   * Akutsu-san is working to get wide-mouth OSEMs
  * Longer cables for BF->PI and SF->PI.
   * Connectors RECEIVED, cables being made.
  * Feedthrough Adapters
   * Connectors RECEIVED.
  * SR machining test ONGOING.
  * Installation stuff
   * "Ceiling" work in BS clean booth (removal of second floor section) scheduled for Fri 7/1.
   * Assembly frame construction scheduled for 7/4
  * Ballast masses for payload
   * Initial batch received - ordered extra smaller ones to allow for adjustments.
  * Lower breadboard stuff
   * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
   * Breadboard springs (in manufacture, expected end of July)
   * Nail-head parts - ordered with assembly frame, will arrive next week.
  * Documents
   * BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]]

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

  • Type B Past Week Summary
    • Mark and Fabian worked at Kamioka with Fujii-san:
      • We attempted to measure the tilt sensitivity of the accelerometers by adding shims under the legs but gave up when we discovered that picking up and putting down the accelerometer perturbs the zero point even without shims. We will probably need a special tilt stage to do this properly.
      • We took some frequency and Q measurements. The results were amplitude dependent. Joris thinks that this is due to not operating the accelerometers close enough to zero DC output.
      • We set up for a test of the geophone noise. One geophone is reading half the output of the others - one of the adapter cables is broken.
    • Hirata-san:
      • Received extra compensation masses and washed them.
      • Received PI guides, assembled them and shipped them to Kamioka.
      • Received backup set of pillar for security structure (with M10 instead of M12 holes at top).
      • Removed adhesive from base of BS flags in preparation for regluing.
      • Did assembly drawings for cable clamps and other add-on parts for BF and SF.
  • Type B ongoing issues
    • Wires
      • Need to decide RM wire thickness and order BS and RM wires. Lead time is a few days from Nilaco.
    • OSEMs
      • Akutsu-san is working to get wide-mouth OSEMs

    • Longer cables for BF->PI and SF->PI.

      • Connectors RECEIVED, cables being made.
    • Feedthrough Adapters
      • Connectors RECEIVED.
    • SR machining test ONGOING.
    • Installation stuff
      • "Ceiling" work in BS clean booth (removal of second floor section) scheduled for Fri 7/1.
      • Assembly frame construction scheduled for 7/4
    • Ballast masses for payload
      • Initial batch received - ordered extra smaller ones to allow for adjustments.
    • Lower breadboard stuff
      • Installation to be incorporated into the procedure document. Mark/Takahashi to discuss.
      • Breadboard springs (in manufacture, expected end of July)
      • Nail-head parts - ordered with assembly frame, will arrive next week.
    • Documents

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-10-28 10:02:46 by fabian.arellano)