Agenda/Minutes

Zoom Meeting

CRY+VIS Interface Meeting

Date : 13:30-

Participants :

Post O3 Upgrade portal

Schedule

• IX: Oplev will be finalized in April. Height and alignment adjustments are on going. ACC will be installed in April.
  • Investigation of the behavior of BF.
  • Wide range FR for the F0.
  • Adjustment of the height of pre-isolator using the piston.
• IY: Remedy of the pre-isolator is scheduled in April.
• EX: Oplev setting is on going.
• EY: Installation of the tower will be restarted in May. Removing of the maraging rod is necessary.

Status

• Corrugate tube fixing jig: They will be prepared by the end of May.
• Commissioning in air: From mid. May for IX.
• Commissioning in vacuum:
• Acceptance check: Check items for in-air commissioning should be confirmed on the payload.
• PF actuator: After the commissioning for suspension.
• Jig for FC painting:
• Overall commissioning:
• Procedure of TM height setting: Prepare for the measurement in the first in-vacuum commissioning in IX.

Discussion

VIS Meeting

14:30-

Participants:

Schedule

See Schedule

• Type-A team: IXV 4/13-16
• Type-B team: PR2 4/13-16

Milestone

• IMC suspensions are ready in air [40] will finish 2011/04/21.

• PRs are ready in air [643] will finish 2011/07/09.

• ETMX is ready in air [656] will finish 2021/08/25.

• ITMX is ready in air [657] will finish 2021/08/31.

• ETMY is ready in air [658] will finish 2021/09/16.

• ITMY is ready in air [659] will finish 2021/11/08.

• BS is ready in air [691] will finish 2011/11/24.

• SRs are ready in air [663] will finish 2011/12/20.

• Output suspensions are ready in air [695] will finish 2011/12/21.

• TMSY is ready in air [708] will finish 2011/??/??.

• TMSX is ready in air [684] will finish 2011/??/??.

2021/03/29 updated

Klog

BS

* [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=16447|16447]] Support for common Tower/Payload model files

Type-B(BS) supports TOWER_MASTER and PAYLOAD_MASTER. , satoru.ikeda

General

• 16446 Model files have been modified. , satoru.ikeda

• 16445 Buoyancy effect in PR suspensions. , fabian.arellano

IX

• 16365 Wiring the release sensor (outside the vacuum chamber) , naohisa.satou

• 16438 Comment , naohisa.satou

• 16421 Height adjustment of ITMX , ryutaro.takahashi

• 16458 Comment , ryutaro.takahashi

PR2

• 16417 Tightening of the inner wire locating clamps. , fabian.arellano

• 16440 Comment , fabian.arellano

• 16444 Comment , fabian.arellano

• 16460 Comment , fabian.arellano

This is generated by python script in /users/Miyo/dropbox/Script/scrapping/main.py.

Summary Report

TypeA

TypeB

Type-Bp PR2

This week we inspected and tightened the wires clapms in PR2. We followed the same procedure as in PR3, so I won't write any details here.

• We removed the IRM side panels and measure the gaps in different places using thickness gauges:
  • Largest gap: 220 um close the wire, but smaller exactly where the wire is.
  • Smallest gap: (50 , 60 ) um.
• We tightened the clamps according to the specification: 10 Nm for the weight holding ones and 2 Nm for the locating ones.
  • 10 out of 12 screws rotated by small amounts when tightened, however,
  • The two screws of the locating clamp at the +Y side were completely loose.
• After we re-assembled and released the payload we realized it had a lot of negative pitch (I wrote positive in the klog, sorry) and at least one OSEM flag was touching.
  • We corrected the pitch with the picomotor.
  • We also moved the BF keystone close to nominal position with the fishing rod.
  • Then we corrected IM yaw.
• We found picomotor cables and stepper motor cables disconnected, so we connected them.
• By the end of today's work the IM seemed to be hanging free.
• We tried to measure TFs, but it seems the actuation is not going through because of a problem in the real-time model. Miyo-kun and Ikeda-san will take a look.

TypeC

• Before pumping down the IMC area, we have to write acceptance document for review. This document will be organized by Akutsu-san with some VIS people (Miyo, Takahashi)

Electronics

Control

Safety

Discussion

Travel Plans

The week from 4/12

• Takahashi: 4/12-16
• Sato: 4/12-16
• Hirata: 4/12-16

The week from 4/19

• Takahashi: 4/19-23
• Sato: 4/19-23
• Hirata: 4/19-23

Next meeting

• 2021/4/16(FRI)