Agenda/Minutes of the VIS Meeting on 2019/11/8

2019/11/8 14:00 -

Zoom Meeting

Participants:

VIS Commissioning Task List

Post-O3 task list

Progress report

Type-A

Past week report

Plan for coming weeks

• Procurement list in 2019FY

Type B

Past week report

The temperature has drifted in the BS clean booth. It has changed 0.8 degrees since October 10th. The top filter DC control signal is abovr 23,000 counts. See klog entry 11423.

Plan for coming weeks

The interferometer is the priority but we should continue with offline work:

• Define new Guardian states for calm-down and obervation phases.
• For the GAS filters DC control we still need to roll-off the filters at high frequencies in order to achive a suitable noise floor.

Type-Bp

Past week report

Fabian changed the orientation of the mirror in misaligned state again. The beam wasn't really going into the beam dump according to Kokeyama-san. After the change it's very close to where it was before. See klog entry 11377.

Plan for coming weeks

OMMT & OSTM (Takahashi)

Past week report

• Finished the assembly of OSTM suspension with the dummy mirror.
• Measured spectrum and transfer functions using the OSEMs.

Plan for coming weeks

VIS electronics

Past week report

Plan for coming weeks

Other site works

Safety

• Incidents:

Discussion

• Status of GAS filter modification.

  • Memo to consider 40kg TM suspensions

  • Finite Element Analysis of pierced type GAS filter

Travel Plans

• Travel (Week of 11/11):
  • Takahashi:
  • Sato: 14,15(Kashiwa)
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanaka:
• Travel (Week of 11/18):
  • Takahashi:
  • Sato:
  • Hirata:
  • Shoda:
  • Fujii:
  • Tanaka:

Next meeting

On 2019/11/15(Fri)