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==== Past week report ====
At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):		 ==== Past two weeks report ====
Kamioka (Mark, Enzo, Kozu-kun):
 * Supported IA team.
 * Replaced LPCDs for IM OSEMs with HPCDs for increased pitch/yaw range.
 * Re-zeroed OL after significant change of beam position during IA.
 * Re-laid-out OL to improve focus of lens to LEN QPD.
 * Offloaded the pitch/yaw actuation at the IM OSEMs using the IM pitch/yaw picos.
 * Enzo worked on design of control loops using the OL.
 * Kozu-kun worked on diagonalizing the OL.
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 * Realized that the SF/BF/... section doesn't need 6 kg added, it needs 6 kg ''removed'', but none to remove. The 20 kg extra in the BF to match the SF GAS filter makes the whole chain overload the PI GAS filter.
 * Lifted the SF/BF/... section to check for net weight and balance. Was 307 kg (cf. G&M's measurement of 301 kf in 2012 for the F0). Can be balanced with only 63 g extra.
 * Went to build up the LBB blade units but discovered that the holes in the base of the blades are two small (are Ø11 mm; should be Ø12 MM). 3D CAD was correct - error was in the 2D drawing. Shipped the blades away for modification.
 * Tested the SF LVDT actuation and worked on debugging it. Still not working.
 * Prepared the PI for being lifted, and the top of the assembly frame for receiving it.
 * Searched for and found the old PI-SF rod.
 * Did safety improvements after Enzo hit his head on a flange bolt: reversed all the bolts on the ±X sides of the BS and put caution tape on them.
 * Debugged Kokeyama-san's changes to the real-time model for the DIO, and started on TFs to check the output filter compensation is working. 		Mitaka (Fabian, Hirata-san):
 * Fabian did mechanical design:
  * F0 FR
  * Cable clamps for the SR IP base.
  * New SR recoil ballast masses.
  * LBB ballast.
  * Update of BS 3D CAD with the as-built ballast.
 * Hirata-san
  * made and updated inventory list for SR.
  * made order list and asked some quotes.
  * Ordered some parts.
  * Talked with mirapro about SRM optical bench.
  * Made some drawings for SR preparation.
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==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].		 ==== Plan for week of 11/13 ====
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Week of 4/24 (four-day week):
 * Crane in PI.
 * Connect SF/BF... section and see if we're indeed overweight and by exactly how much.
 * Finish debugging SF LVDT actuation.		 Enzo and Kozu-kun at Mitaka
 * Servos
 * Diagonalization of OL
 * TFs of BF
 * Documentation
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Week of 5/1:
 * No activity (Golden Week).		 Mark and Fabian at Kamioka.
 * Mark attends commissioning workshop at U Toyama.
 * Support BF characterization work.
 * Prepare for mirror gluing.
 * Prepare for IM assembly.

Hirata-san at Mitaka
 * SR procurement.
 * Get BS prism-gluing jigs reworked for use with PR/SR mirror box.

==== Plan for week of 11/20 ====
 * Holiday on Thu 3/23
 * Fabian at commissioning workshop
 *

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past two weeks report

Kamioka (Mark, Enzo, Kozu-kun):

  • Supported IA team.
  • Replaced LPCDs for IM OSEMs with HPCDs for increased pitch/yaw range.
  • Re-zeroed OL after significant change of beam position during IA.
  • Re-laid-out OL to improve focus of lens to LEN QPD.
  • Offloaded the pitch/yaw actuation at the IM OSEMs using the IM pitch/yaw picos.
  • Enzo worked on design of control loops using the OL.
  • Kozu-kun worked on diagonalizing the OL.

Mitaka (Fabian, Hirata-san):

  • Fabian did mechanical design:
    • F0 FR
    • Cable clamps for the SR IP base.
    • New SR recoil ballast masses.
    • LBB ballast.
    • Update of BS 3D CAD with the as-built ballast.
  • Hirata-san
    • made and updated inventory list for SR.
    • made order list and asked some quotes.
    • Ordered some parts.
    • Talked with mirapro about SRM optical bench.
    • Made some drawings for SR preparation.

Plan for week of 11/13

Enzo and Kozu-kun at Mitaka

  • Servos
  • Diagonalization of OL
  • TFs of BF
  • Documentation

Mark and Fabian at Kamioka.

  • Mark attends commissioning workshop at U Toyama.
  • Support BF characterization work.
  • Prepare for mirror gluing.
  • Prepare for IM assembly.

Hirata-san at Mitaka

  • SR procurement.
  • Get BS prism-gluing jigs reworked for use with PR/SR mirror box.

Plan for week of 11/20

  • Holiday on Thu 3/23
  • Fabian at commissioning workshop

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