Contents

  1. Activities in this week
    1. VIS/General
    2. VIS/EY
    3. VIS/IX
    4. VIS/MCE
    5. VIS/PRM
    6. VIS/PR3
    7. VIS/SR3
  2. Agenda/Minutes on 2021/2/12
  3. CRY+VIS Interface Meeting
  4. VIS Meeting
    1. Progress report
      1. General
      2. Type-A
      3. Type-B
      4. Type-Bp
      5. Type-C
      6. Controls
      7. Electronics
    2. Towards O4
    3. Safety
    4. Discussion
    5. Travel Plans
    6. Next meeting

Activities in this week

VIS/General

Summary: Ikeda-san worked following items;

(1) Measured the length of the network cable (15956) and now prepare to order the cables with DGS group.

(2) He got message from manufacturer that it is difficult to operate the picomotor for long time (more 24 hours). So he is now considering to request to AEL group to make the circuit box that turns power on and off with BIO signal like the stepper motor circuit. (15958)

(3) He made the new MEDM screen for stepper motor on MN stage which is developed by Nishimoto-kun. We can open the screen from [sitemap]/[STEPPING MOTOR]/[CRY_OVERVIEW] (15965).

VIS/EY

Summary: Setup of the F2 stage in EY: installation of suspension wire, cabling, calibration of LVDT, check of FR range, tuning

VIS/IX

Summary: Connection of the cryo-payload in IX, mounted the geophones onto the IP in IX, and compressed the F0 blades in IX.

VIS/MCE

Summary: Akutsu-san found the optical lever light hit on the edge of the MCE mirror during his investigation on IMC ghost beams.

VIS/PRM

Summary:

(1) Miyo fixed the swapped cabling on the BF-damper for PRM with Nakagaki-san, and after that, the noise coupling of the transfer function at higher frequency is decreased to the same behavior of other PR suspensions (15994).

(2) Ikeda-san touched the picomotor of PRM for his first operation (15957) before measure the calibration factor between picomotor and OSEM.

VIS/PR3

Summary: Ikeda-san tested the picomotor operation and measured rough calibration value for PR3-IM picomotor (15977). During the test for BF picomotor, it was stucked (15976). So we need open the top chamber to fix that.

VIS/SR3

Agenda/Minutes on 2021/2/12

Zoom Meeting

CRY+VIS Interface Meeting

13:30-

Participants:

Post O3 Upgrade portal

VIS Meeting

14:00-

Participants:

Progress report

General

[Miyo] See Activities/General

Type-A

[Takahashi] See EY

[Takahashi] See IX

Type-B

Type-Bp

[Miyo] See PR3

[Miyo] See PRM

Type-C

[Miyo] See MCE

Controls

Electronics

Towards O4

Safety

Discussion

Travel Plans

The week from 2/15

The week from 2/22

Next meeting