Agenda/Minutes of the VIS Meeting on 2020/8/7

2020/8/7 14:00 -

Zoom Meeting

Participants:

Progress report

General

• [Miyo] by 08/28/2020?, 20% done (+0%), Make a cabling diagram for O4

• [Miyo] by 08/28/2020?, 25% done (+0%), Make prototype system for temperature control

• [Miyo] by 08/28/2020?, 20% done (+0%), Enable to control the limit switch of stepper motor

• [Miyo] by 08/28/2020?, 0% done (+0%), Request AEL chassis for picomotor driver

• [Miyo] by 08/28/2020?, 0% done (+0%), Update remote control system

• [Miyo] by 08/28/2020?, 0% done (+0%), Add CRY stepper motor in the remote control system

Type-A

• [Miyo] Installed the Prequa system in TypeA

  • (This week) Installation was finished. Now I try to diagonalize sensors and balance actuators by using the Prequa system.
  • (Next week) I will do the modal damping on TypeA suspensions after the initialization work for sensors and actuators.

Type-B

• On Monday I submitted the paper to CPC: JGW-P2011860.

• Noise budget paper: I calculated upper limits to DAC and coil driver noise contribution to DARM for the BS: klog 14875.

Type-Bp

• Noise budget paper: Fabian calculated upper limits to DAC and coil driver noise contribution to DARM for PRM: klog 14876.

Type-C

Controls

Electronics

Towards O4

• KAGRA is in "Upgrade phase for O4". PreQua system was implemented to the Type-A.

• Confirmation of personnel at the site.
  • Type-A team: Takahashi, Sato, Miyo, + Company(Jan-Apr)
  • Type-B/Bp team: (Shoda,) Hirata, Fabian, Washimi, + Company(Oct-Dec)
• Procedure documents are required by SEO.

  • Type-A tower

  • Limit switches

  • Wire gluing in PR3 (by Shoda)
  • Filter height adjustment in Type-B (by Fabian)

• Schedule towards O4 (Chart) was revised.

cf. Post Obs. task (Request), Task for O3c (Plan, Sheet), Task towards O4 (List).

Safety

• [Washimi] Room Temmperature report(https://www.icrr.u-tokyo.ac.jp/~washimi/KAGRA/SEM/fig_GAS/)

  • We turned on the FFUs in CS and Y-end on 2020-8-3 to recover the room temperature (klog14851) ->RT becames about the same as before the heavy rain.

  • BS temperature was droped (~0.6 degC) in this morning (klog14879) -> The Ondotori was dropped.

Discussion

Travel Plans

Next meeting

• On 2020/8/19(Wed)?