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• VIS
• VISMinutes20200925

Agenda/Minutes on 2020/9/25

Zoom Meeting

CRY+VIS Interface Meeting

13:00-14:00

Participants: Takahashi, Miyo, Uchiyama, Aso, Hirata, Sato, Ikeda, Tomaru, Hagiwara, Kimura, Ushiba, Sawada、Akutsu

• Post O3 Upgrade portal

• Schedule

  • The schedule reconstruction for vacuum chamber opening is necessary due to the extension of RSE Trial.
  • Removing of SR3 is planed from end of January with moving of the assembly frame.
  • Confirmation of timing for the tower-payload disconnection.
  • Request on the IP tracking at evacuation and floor monitor at vent in IYV.

VIS Meeting

14:00-15:00

Participants: Takahashi, Fabian, Hirata, Satou, Terrence, Miyo, Aso, Washimi, Ishizaki

Progress report

General

• Iguchi-san will join VIS.

Type-A

• [Fujii] Can you please update the status of paper writing especially about the Type-A mechanics and its control? I also would like to know the rough schedule that you team are planning. Please let me know. Leaving your comments here will be enough. O-tsu-ka-re-sa-ma-de-su. (My account will have to be removed I guess btw..)

Type-B

• [Sato] Design of the limit switches for BS IP FR. BS IP FR limit switch_20200924.pdf

• I submitted the paper to C&QG, finally.

• Hirata-san and I had an information session for Washimi-san.
• I asked to Takahashi-san for some long poles to mount the dial gauges around outer frames. Maybe there are some in TAMA. Work in progress.
• Given the new temperature conditions in the central room, I offloaded fishing rods:

  • SR2 (klog 15081) and SRM (klog 15083) fishing rods are working well.

  • BS: F0 and BF fishing rods look healthy and F1 one is at the bottom of its range (klog 15071).

  • SR3: F0 fishig rod is healthy, the F1 one is still jammed and BF one at its upper limit (klog 15070).

  • I changed some DC filters setpoint and updated BURT and SDF files. In SR3 I keep the height of the mirror constant.

• For SR3 F1, I calculated the amount of ballast the needs to be removed to bring it to nominal height: 31 grams or less (klog 15102). This number has be reviewed once I calculate how much mass we need to remove from the IM. The BF fishing rod needs to be in mid-range with control off to know.

• Next week:
  • Same calculation for the other filters: they require setting the fishing rods to mid-range.
  • With the new temperature conditions I need to measure IP resonant frequencies again.
  • LVDT card document

Type-Bp

Type-C

• Ordered the manufacture of a modified IMMT2 support frame.

Controls

Electronics

Towards O4

• KAGRA is in "RSE Trial" now. "SEO is thinking about possibility for one week extension and the schedule reconstruction for vacuum chamber opening."
• Preparation work.
  • The preparation work will be started on Oct. 1st.

  • Schedule and assignment of personnel

  • Cleaning procedure.

  • Inventory sheet with the segment name is necessary (Example of Type-A).

• Schedule

• Procedure documents.

  • Type-A tower installation

  • Limit switches

  • Limit switch connecting guide

  • Replacement of TF blades

  • Wire gluing in PR3

  • Type-B remedying work

• Criteria in the acceptance test Sheet.

• Presentation
  • PAB (10/8)
  • Chief Meeting (10/12)

Safety

Discussion

• [Terrence] VIS health checking system VISHack

Travel Plans

The week from 9/28

• Takahashi: 9/30-10/2
• Sato: 9/30-10/2
• Hirata: 9/30-10/2

The week from 10/5

• Takahashi: 10/5-9
• Sato: 10/5-9
• Hirata: 10/5-9

Next meeting

• On 2020/10/2(Fri)