Differences between revisions 5 and 9 (spanning 4 versions)
⇤ ← Revision 5 as of 2020-06-18 10:03:09 →
Size: 1567
Editor: RyutaroTakahashi
Comment:
← Revision 9 as of 2020-06-19 11:37:58 → ⇥
Size: 2435
Editor: fabian.arellano
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
2020/6/19 14:00 -  2020/6/19 14:00 -
Line 6: Line 6:
Participants:  Participants:
Line 12: Line 12:
 * For SR baffle installation I checked the mirror height reference marks done by Terada-san. They are still there. See klog report [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=14573|14573]].
 * SR2 decay times: following the issue of the mode IP-L 406 mHz, whose damping time was 35 seconds longer with the control system on (klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=14510|14510]])
  * I checked the UGF to be 85 mHz. Being lower than 406 mHz it should not affect such mode according to certain expectations. Still, I put a notch (f=406 mHz, Q=10 and depth 40 dB) and repeated the measurement. '''The decay time with the control off decresed by 40 seconds'''.
Line 27: Line 31:
 * Correction of concerned topics for the evaluation meeting on 22nd ([[https://docs.google.com/spreadsheets/d/1H4C5fgKQeo33BWILQqFjU4gUUmzLn7y2AYuI5B8rGiA/edit?usp=sharing|google spreadsheet]]).

Agenda/Minutes of the VIS Meeting on 2020/6/19

2020/6/19 14:00 -

Zoom Meeting

Participants:

Progress report

General

Type-A

Type-B

  • For SR baffle installation I checked the mirror height reference marks done by Terada-san. They are still there. See klog report 14573.

  • SR2 decay times: following the issue of the mode IP-L 406 mHz, whose damping time was 35 seconds longer with the control system on (klog entry 14510)

    • I checked the UGF to be 85 mHz. Being lower than 406 mHz it should not affect such mode according to certain expectations. Still, I put a notch (f=406 mHz, Q=10 and depth 40 dB) and repeated the measurement. The decay time with the control off decresed by 40 seconds.

Type-Bp

Type-C

Controls

Electronics

Post O3

  • Post Obs. tasks are on going. Real-time model was modified in this week. Sensor correction for SRs and SR suspension update are planed in the next week.
  • The extended chief meeting was held on 15th. DRFPMI commissioing was scheduled in Jul.-Aug. The tasks towards O4 will be started from Sep.

  • Proposal on suspension commissioning was shown in the extended chief meeting.

  • "Remote/onsite support on VIS troubles by VIS group members with shift style" is requested for the DRFPMI commissioing.

  • Schedule towards O4 was revised again.

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

Safety

Discussion

Travel Plans

Next meeting

  • On 2020/6/26(Fri)

KAGRA/Subgroups/VIS/VISMinutes20200619 (last edited 2020-06-19 15:15:23 by RyutaroTakahashi)