Differences between revisions 3 and 9 (spanning 6 versions)
Revision 3 as of 2021-11-26 12:25:55
Size: 3193
Comment:
Revision 9 as of 2021-11-26 14:28:52
Size: 3766
Comment:
Deletions are marked like this. Additions are marked like this.
Line 8: Line 8:
Date: 2021/11/26 13:00- Date: 2021/11/26 13:00-13:40
Line 10: Line 10:
Participants: Participants: Takahashi, Uchiyama, Yasui, Sato, Aso, Ikeda, Kimura, Ushiba, Tomaru, Akutsu, Hirata, Yokozawa, Miyoki
Line 15: Line 15:
 * IX: Finalization of cryo-payload.
 * EX: Finalization of cryo-payload. Installation of ACCs. Replacement of flip cables.
 * IY:
 * EY:
 * IX: Finalization of cryo-payload. It will be finished on 11/26.
 * EX: Finalization of cryo-payload. It will be finished in early next week. Installation of ACCs. Replacement of flip cables.
 * IY: 
 * EY: Some problems were found on the actuators.
Line 21: Line 21:
 * Replacement of Flip cable: EX on 11/25-26. IX in the next week.  * Replacement of Flip cable: EX in this week. IX in the next week.
Line 37: Line 37:
Date: 2021/11/26 14:00- Date: 2021/11/26 14:00-14:30
Line 39: Line 39:
Participants: Participants: Takahashi, Ushiba, Hirata, Fabian, Uchiyama, Sato, Aso, Ishizaki, Tanaka, Terrence
Line 43: Line 43:
 * Installed the accelerometers to EX.
 * Replaced the flip cables in EX.
Line 55: Line 58:
 * Diagonalization. Cross-ouplings are all around/below the 1% level [[https://klog.icrr.u-tokyo.ac.jp/osl/?r=18994|https://klog.icrr.u-tokyo.ac.jp/osl/?r=18994]]
 * IM H1 cable were disconnected from the flanged. Fabian helped plugging back them.
 * Diagonalization. Cross-couplings are all around/below the 1% level [[https://klog.icrr.u-tokyo.ac.jp/osl/?r=18994|https://klog.icrr.u-tokyo.ac.jp/osl/?r=18994]]
 * IM H1 cable was disconnected from the flanged. Fabian plugged them back. [[https://klog.icrr.u-tokyo.ac.jp/osl/?r=18996|https://klog.icrr.u-tokyo.ac.jp/osl/?r=18996]]
Line 66: Line 69:
 * Type-A team: Finalization of IX and EX.
 * Type-B team:
 * Type-A team: Finalization of IX and EX. Recovery of actuators in EY.
 * Type-B team: SR2 control system. TF LVDT in BS. Replacement of flip cables in BS.

Agenda/Minutes

Zoom Meeting


CRY+VIS Interface Meeting

Date: 2021/11/26 13:00-13:40

Participants: Takahashi, Uchiyama, Yasui, Sato, Aso, Ikeda, Kimura, Ushiba, Tomaru, Akutsu, Hirata, Yokozawa, Miyoki

Post O3 Upgrade portal

Schedule

  • IX: Finalization of cryo-payload. It will be finished on 11/26.
  • EX: Finalization of cryo-payload. It will be finished in early next week. Installation of ACCs. Replacement of flip cables.
  • IY:
  • EY: Some problems were found on the actuators.

Status

  • Replacement of Flip cable: EX in this week. IX in the next week.
  • TM height setting: ITMY.
  • Oplev: Setup of the TM Oplev in IY after the TM alignment.
  • ACC: Installed to EX on 11/24-25. Assembly for EY is ongoing.
  • Commissioning in air: GRY.
  • Commissioning in vacuum: Chamber closing is scheduled from 12/13.
  • Overall commissioning:
  • Acceptance check:
  • PF actuator: At the in-vacuum commissioning.
  • New vacuum pumps for V-chambers: 11/24 in IXV.
  • Heater control:
  • Power source for Oplev: The next target is IX.

Discussion


VIS Meeting

Date: 2021/11/26 14:00-14:30

Participants: Takahashi, Ushiba, Hirata, Fabian, Uchiyama, Sato, Aso, Ishizaki, Tanaka, Terrence

Summary Report

Type-A

  • Installed the accelerometers to EX.
  • Replaced the flip cables in EX.

Type-B

About the BS F1 LVDT problem

  • We identified a place to mount the optical displacement sensor for calibrating the LVDT.
  • The sensor use an area on the BF cap free of ballast masses and cables.
  • It should be held from the pillar of the security structure. Hirata-san and I already have a plan. We'll use some components from Thorlabs and a couple of new pieces.

  • Takase-san finished making holes to electronics adapter box.
  • I did an experiment and it increased the SNR by a factor of 21.
  • Yesterday we covered the flanges of the SR2 and BS chambers and turned the Koach filters off, so today I quickly checked whether the moving peak in F1 LVDT spectra was still there: it is.

SR2

Type-Bp

Type-C

Electronics

Control

Schedule

See Schedule

  • Type-A team: Finalization of IX and EX. Recovery of actuators in EY.
  • Type-B team: SR2 control system. TF LVDT in BS. Replacement of flip cables in BS.

Safety

Discussion

Travel Plans

(Date in Kamioka)

The week from 11/29

  • Takahashi: 11/30-12/3
  • Sato: 11/30-12/3
  • Hirata: 11/30-12/3

The week from 12/6

  • Takahashi: 12/7-10
  • Sato: 12/7-9
  • Hirata: 12/7-10

Next meeting

  • 2021/12/3(FRI)

KAGRA/Subgroups/VIS/VISMinutes20211126 (last edited 2021-11-26 14:28:52 by RyutaroTakahashi)