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 * Type B Past Week Summary
  * Fabian finished dummy BS assembly.
  * Mark and Tatsumi-san glued magnets into both types of BS optic flags, and discs into BS IM flags. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1815 |klog]] Two optic flags had to be redone because the magnets moved while the glue was drying. Hirata-san helped remove the magnets with acetone in the ultrasonic cleaner. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1818|klog]]
  * Tatsumi-san, Fabian and Mark took the dummy BS to Kashiwa and glued the flags and prisms. We will check status on Mon 6/13.
  * Hirata-san measured another filter.
  * Hirata-san washed a batch of parts.
  * Hirata-san worked on work platforms for the installation.
  * Hirata-san looked for a crane scale for use at the site. (We decided the 500 kg version of the one used at TAMA.)
  * Hirata-san worked on making some guide parts for the PI installation (Misumi parts with minor additional machining from ATC).
  * We finalized a design for simple SS mirror parts for the dummy BS with Akutsu-san. They will be made by ATC.
  * Mark worked on list of items for purchase in FY2016 and on the schedule.
  * Fabian did more work on the IM assembly. It is nearly done and he will start on the RM next week.
 * Type B ongoing issues
  * Can we make SR wire breakers bigger?
   * Fukushima-san will start on machining test soon (as of 5/27).
  * Not enough crane height problem (Hirata, Saito) - no action since last week
  * Ballast masses for payload
   * Initial batch received - ordered extra smaller ones to allow for adjustments.
  * Lower breadboard stuff
   * '''Need to be incorporated into the procedure document. Discuss with Takahashi (Mark)'''
   * Breadboard springs (in manufacture, expected end of July)
   * Nail-head parts: quote from Mirapro received, not urgent, will be combined with assembly frame order.
  * Clean bag - expected 6/8.
 * Documents
  * BS Assembly Procedure [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]]		 === Type B (Mark) ===
==== Report for the week of 2/25 ====

 * Fabian monitored suspensions during the vent.
 * Terrence and Mark made lots of changes to the Guardians and RTMs:
  *
 * Fabian went inside the SRM chamber and diagnosed the problem that had appeared shortly before vent. It turned out to be yaw of the IP causing a payload cable to touch. He fixed it with the F0 yaw stepper. (He had tried this earlier without success but it turned out the problem was another dead output on the stepper driver.)
 * Terrence traced the geophone issue to a group of dead channels on the AA chassis. We tried replacing the chassis and it fixed not only the geophone issue but an issue in the
==== Plan for week of 2/25 ====
 * Mark from Tuesday.
 * Enzo from Monday lunchtime.
 * Continue debugging stepper reset system.
 * Continue monitoring SRM yaw drift.
 * Install new RTMs and Guardian.
 * Debug SRM geophones.
 * Setup SRM and SR3 LEN OLs (low priority).
 * Work on Type B paper.

==== Vacation/Travel Info ====
 * Enzo vacation, 3/5 and possibly 3/6.
 * Enzo et al. Farewell Party, 3/7.
 * Enzo at JPS then final vacation, 3/13-29
 * Terrence's last day, 3/29.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for the week of 2/25

  • Fabian monitored suspensions during the vent.
  • Terrence and Mark made lots of changes to the Guardians and RTMs:
  • Fabian went inside the SRM chamber and diagnosed the problem that had appeared shortly before vent. It turned out to be yaw of the IP causing a payload cable to touch. He fixed it with the F0 yaw stepper. (He had tried this earlier without success but it turned out the problem was another dead output on the stepper driver.)
  • Terrence traced the geophone issue to a group of dead channels on the AA chassis. We tried replacing the chassis and it fixed not only the geophone issue but an issue in the

Plan for week of 2/25

  • Mark from Tuesday.
  • Enzo from Monday lunchtime.
  • Continue debugging stepper reset system.
  • Continue monitoring SRM yaw drift.
  • Install new RTMs and Guardian.
  • Debug SRM geophones.
  • Setup SRM and SR3 LEN OLs (low priority).
  • Work on Type B paper.

Vacation/Travel Info

  • Enzo vacation, 3/5 and possibly 3/6.
  • Enzo et al. Farewell Party, 3/7.
  • Enzo at JPS then final vacation, 3/13-29
  • Terrence's last day, 3/29.

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