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Revision 90 as of 2016-12-02 10:18:30
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Revision 91 as of 2016-12-08 16:02:18
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Editor: MarkBarton
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 * Type B Past Week Summary
  * Mark worked on task lists and schedule.
  * Mark worked on an update of the BS Electronic Items doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5111|E1505111]]) and started a SRx Electronics Items doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5886|E1605886]]).
  * Mark did a summary spreadsheet of Takahashi-san's cable orders to see what needed to be ordered immediately (new BS TM OSEM cables; geophone adapters) and later (for SRx).
  * Mark worked on an update of the In-Vacuum Cable doc ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=3901|E1503901]]), including information on final lengths that Fabian and Hirata-san had decided when making adapter cables.
  * Mark considered an alternative cabling scheme for the geophones (with a different adapter cable to put the signals and power on different lines and a matching unscrambler) but ended up concluding that the existing design would probably be OK. See [[attachment:00 Revised Geophone-v2.PDF]].
  * Fabian worked on a redesign of the EQ stops for the BS (2 of 4 screws under the RM are opposite large holes and there are no screws to restrain the RM front/back at either top or bottom).
  * Hirata-san worked on PR/SR mirror box modifications with Shoda-san (on-going).
  * Hirata-san partially assembled a bottom filter for use in fit tests of the PRx BF recoil mass.
 * Mark and Fabian debugged the rubbing issue with the BS. It turns out the EQ stops between the IRM and IM are so misaligned that they can't be used at all. This misalignment was noted on 10/17 klog [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=2090|2090]] but seems to have gotten worse. With the stops removed, the OSEMs are still fairly well centered, so the problem probably predates the earthquake of 11/1.
 * Mark worked on the PR2 rack:
  * Rearranged the items in the rack to make space for new AA and AI chassis at the bottom near the IO chassis.
  * Replaced the AA chassis, which had had a group of channels marked as bad by Michimura-san.
  * Installed a second AA chassis and a second AI chassis in the rack.
  * Installed a second ADC card and a second DAC card in the IO chassis.
  * Modified the k1ioppr2 real-time model to recognize the new ADC/DAC cards and also the extra DIO cards installed previously.
  * Attempted to modify the k1visbs real-time model to recognize the new ADC/DAC cards. Unfortunately, apparently due to changes to library parts made by Okutomi-san, neither the original model or Okutomi-san's new model can be successfully compiled and installed anymore! Debugging is ongoing.
 * Fabian finished the redesign of the EQ stops for the BS RM. Hirata-san will refine the 3D design and do drawings (estimated 1/2 day).
 * Fabian redesigned the cable clamp on top of the multi-purpose cube (on the RM) to avoid the need for clips. (These are too easily moved if the cables are moved during installation and removal of the safety bar between the RM and IM, which has to be done many times.)
 * Mark and Fabian reviewed the previous iJect payload parts order and flagged the items that need updating.
 * Mark worked on task lists and schedule.
 * Hirata-san finished the PR/SR mirror box modifications.
 * Hirata-san washed parts (screws and collets).

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

  • Mark and Fabian debugged the rubbing issue with the BS. It turns out the EQ stops between the IRM and IM are so misaligned that they can't be used at all. This misalignment was noted on 10/17 klog 2090 but seems to have gotten worse. With the stops removed, the OSEMs are still fairly well centered, so the problem probably predates the earthquake of 11/1.

  • Mark worked on the PR2 rack:
    • Rearranged the items in the rack to make space for new AA and AI chassis at the bottom near the IO chassis.
    • Replaced the AA chassis, which had had a group of channels marked as bad by Michimura-san.
    • Installed a second AA chassis and a second AI chassis in the rack.
    • Installed a second ADC card and a second DAC card in the IO chassis.
    • Modified the k1ioppr2 real-time model to recognize the new ADC/DAC cards and also the extra DIO cards installed previously.
    • Attempted to modify the k1visbs real-time model to recognize the new ADC/DAC cards. Unfortunately, apparently due to changes to library parts made by Okutomi-san, neither the original model or Okutomi-san's new model can be successfully compiled and installed anymore! Debugging is ongoing.
  • Fabian finished the redesign of the EQ stops for the BS RM. Hirata-san will refine the 3D design and do drawings (estimated 1/2 day).
  • Fabian redesigned the cable clamp on top of the multi-purpose cube (on the RM) to avoid the need for clips. (These are too easily moved if the cables are moved during installation and removal of the safety bar between the RM and IM, which has to be done many times.)
  • Mark and Fabian reviewed the previous iJect payload parts order and flagged the items that need updating.
  • Mark worked on task lists and schedule.
  • Hirata-san finished the PR/SR mirror box modifications.
  • Hirata-san washed parts (screws and collets).

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-07-29 13:18:56 by fabian.arellano)