Agenda/Minutes of the VIS Meeting on 2020/6/5

2020/6/5 14:00 -

Zoom Meeting

Participants: Takahashi, Fabian, Sato, Hirata, Aso, Shoda, Lucia, Ishizaki, Tanaka, Miyo

Task list towards O4

Schedule towards O4

Progress report

General

• Because of Nakano-san and Miyoki-san's request, Miyo made VIS_MANAGER guardian to monitor and manage all suspensions. klog14469

• Now, this guardian requests the all suspensions to go PAY_LOCAL_DAMPED state for safety when an earthquake hits.
• but, there are no big earthquakes from this work. When big earthquakes happen, I will check and modify this guardian.

Type-A

Type-B

• Fabian analyzed data of the SR2 suspension decay times with the control system on. Almost done but no plot to show yet.

• On Thursday I helped Ushiba-san and Yokozawa-san to measure the BS oplev QPDs dark noise. See klog entry 14473.

• No questions about inertial damping today.

Type-Bp

Type-C

Controls

• Type-A modeling (Shoda)
  • (for the paper) Searching for the fastest way to derive the theoretical spring constant of the actual HLs.
  • (for the cryo-p evaluation) The RT model is updated. Need update of the actuation efficiency.

Electronics

Post O3

• More activities in the control room and the site became available from June 1st (Noise budget measurement by Ushiba).
• O3c has not been decided yet, but the situation is going to O4 directly.
• The site work towards O4 is rescheduled. The extended chief meeting will be held on June 15th to discuss about the plan towards O4.

Post Obs. task (Request), Task for O3c (Plan, Sheet).

Safety

Discussion

Travel Plans

Next meeting

• On 2020/6/12(Fri)