Agenda/Minutes of the VIS Meeting on 2018/4/13

2018/4/13 13:30 -

Participants:

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF/MPP)

Type-A (Takahashi)

Past week report

[X-front]

• Set the bridge frame on the footholds.
• Installed the IP and TF into the clean booth.
• Combined the IP and the TF.
• Dismounted the GAS blades from the TF.
• Assembled the FR on the TF.
• Assembled the new designed yaw actuator on the TF. Not completed.
• Prepared the damper ring with magnets for the F1.
• Cabled around the TF.
• Repairing the side stoppers for the IY EQ stop.

Plan for coming weeks

[X-front]

• Mount the GAS blades on the TF.
• Set the PI on the bridge frame.
• Tune the TF.
• Cable between the F1 and PI.

Type B (Mark)

Past week report

• SRM design is on going.
• LBB ballast mass design is on going.
• Control Issue
  • Start discussion about the Phase-I measurement. The coupling measurement is the main target (since L to L should be measured by OLG measurement.)
  • Creating control simulation tools (including noise budgeting) for VIS.

Plan for coming weeks

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Ohishi)

Past week report

• Estimated effect of OSEM magnetism

  • https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=8154

  • If you find any mistake, please let me know.
• Checked drawings in detail and ordered some minor changes of drawings.
• OMMT mirrors have been delivered to Kashiwa.
  • OMMT1: diameter 99.95mm, thickness 55.58mm(max), wedge 2.45deg
  • OMMT2: diameter 99.97mm, thickness 55.08mm(max), wedge 3.3deg

Plan for coming weeks

• Order mechanical parts
• Calculate standoff position of OMMT mirrors

Watchdog system (Tanaka)

Past week report

Plan for coming weeks

Other site works

Safety

• Incidents:
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

• Composite SRM design (Shoda)

Travel Plans

• Travel (Week of 4/16):
  • Takahashi:
  • Okutomi:
  • Sato:
  • Ishizaki:
  • Mark:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanioka:
  • Tanaka:
  • Kozu (ICRR):
  • Arai (ICRR):
• Travel (Week of 4/23):
  • Takahashi:
  • Okutomi:
  • Sato:
  • Ishizaki:
  • Mark:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanioka:
  • Tanaka:
  • Kozu (ICRR):
  • Arai (ICRR):

Next meeting

On 2018/4/20(Fri)