Differences between revisions 1 and 4 (spanning 3 versions)
Revision 1 as of 2020-08-18 10:14:12
Size: 1607
Comment:
Revision 4 as of 2020-08-18 13:21:41
Size: 2703
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
2020/8/19 14:00 -  2020/8/19 14:00 -
Line 6: Line 6:
Participants:  Participants:
Line 12: Line 12:
Line 13: Line 14:
 * '''BS IP position and outer frame beams:''' During the review of the Type-B remedying work I began thinking about the effects of the installation of the BS outer frame beams: installation will likely change the position of the upper platform which supports the IP, thus changing the position of the IP also. I've asked Uchiyama-san if we could measure the frame upper platform displacement using dial gauges. If so we could compensate by setting a new appropriate set point for the IP.
 * '''Oplev box and outer frame beams:''' I've asked to Akutsu-san about the oplev box status. I haven't received an answer yet. Very likely we will need to completely remove the oplev optics to install the box. The installation of the BS outer frame beams will likely require removal of the oplev receiver optics.
 * '''Question for Satou-san:''' Have we bought the cables requested for the yaw stepper motor for Type-B suspensions? They were requested on [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/VIS/VISMinutes20200306|06/03/2020 meeting]] where the specifications were also given.
Line 17: Line 22:
Line 33: Line 37:

Agenda/Minutes of the VIS Meeting on 2020/8/19

2020/8/19 14:00 -

Zoom Meeting

Participants:

Progress report

General

Type-A

  • Started procurements of LVDT coils for ACCs.

Type-B

  • BS IP position and outer frame beams: During the review of the Type-B remedying work I began thinking about the effects of the installation of the BS outer frame beams: installation will likely change the position of the upper platform which supports the IP, thus changing the position of the IP also. I've asked Uchiyama-san if we could measure the frame upper platform displacement using dial gauges. If so we could compensate by setting a new appropriate set point for the IP.

  • Oplev box and outer frame beams: I've asked to Akutsu-san about the oplev box status. I haven't received an answer yet. Very likely we will need to completely remove the oplev optics to install the box. The installation of the BS outer frame beams will likely require removal of the oplev receiver optics.

  • Question for Satou-san: Have we bought the cables requested for the yaw stepper motor for Type-B suspensions? They were requested on 06/03/2020 meeting where the specifications were also given.

Type-Bp

Type-C

Controls

Electronics

Towards O4

  • KAGRA is in "Upgrade phase for O4".
  • Procedure documents.
  • Schedule towards O4 was revised (Chart).

cf. Post Obs. task (Request), Task for O3c (Plan, Sheet), Task towards O4 (List)

Safety

Discussion

  • [Terrence] New features for the suspensions, type-A and type-B, as pre-O4 upgrades.

Travel Plans

Next meeting

  • On 2020/8/28(Fri)

KAGRA/Subgroups/VIS/VISMinutes20200819 (last edited 2020-08-19 16:08:54 by RyutaroTakahashi)