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 * Type B Past Week Summary
  * Fabian did inventory of parts/fasteners for dummy BS, RM, IM and IRM - almost all at Mitaka. A handful (picos, pico drivers) will be brought back from Kamioka.
  * Fabian continued work on Mathematica and Matlab models of the BS and control system. He now gets much better agreement after correcting discrepancies between the parameter sets.
  * Hirata-san worked on organizing:
   * Checking Mirapro assembly frame drawings
   * Ordering missing screws and small items (screws for dummy mass, fine pitch M8 for RM)
   * Work platforms and clean booth second floor arrangement.
   * Load gauge adapter and associated parts
   * Possible fall-back plans for the rods connecting the security structure to the PI.
   * Design for additional trim masses (existing design had no provision for adding/removing).		 === 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)