Agenda/Minutes of the VIS Meeting on 2017/2/3

2017/2/3 13:30 -

Participants:

Progress report

Schedule Chart : (PDF,MPP)

Type-A (Takahashi)

• Minutes of Type-A Meeting

• Preparation of installation: The hoist tool was assembled. The pallet and the hand lifter was prepared to open the top chamber.
  • Protection net was assembled, but the diameter was too large a little. It will be made smaller.
• EYV chamber: Top chamber was opened and the frame lock was installed.
• BF damper: Pre-assembly of the BF damper was started.
• Pre-isolator: The setup of assembling the pre-isolators was withdrawn from the large clean room.
• Maraging wire: The wires were delivered on 31st January. They were sent to the thermal process on 1st February.
  • The 3.3m wire will be treated at Himeji facility of Kinzoku-giken.

Type B (Mark)

• Put a report here

Type-Bp (Shoda)

• Hanging report: IRM hanged

  • We hanged the IM and adjusted the weight.

    • The weight adjusting went very smoothly with new ballast masses

    • The iron small plates for the new IM OSEM flags detached easily.
  • IRM hanged and IM OSEMs are set.
    • The direction of the IM OSEM flag changes easily. It is difficult to find whether IM flag direction or OSEM direction is wrong during the OSEM adjustment.
      • Also, wide cavity OSEMs never touch to flags so far. However, alignment accuracy was reduced a lot.
  • Measured IM OSEM spectrum and IM TFs.
    • We found that OSEM noise are large and have some structure in spectra, which are coherent between 6 OSEMs.
    • YAW TF could not be measured well.

      -> Need more investigation.

• BFRM test assembly was done except for the BFRM hanging and LVDT coil assembly. No problem so far. May need 2nd test when the suspension rods are delivered.

• Next week task: Set the BF and the BFRM about to be hanged.

  • Implement active damping for IM and BF GAS.
  • Assemble the BF and the BFRM.
  • Set the Traverser and the SF.

IMMT (Ohishi)

• Put a report here

Watchdog system (Tanaka)

• Put a report here

Safety

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

Discussion

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

Travel Plans

• Travel (Week of 2/6):
  • Takahashi: 6-10
  • Shoda: 6-10
  • Mark: 6-10
  • Fabian: 6-10
  • Okutomi: 6-10
  • Fujii:
  • Ishizaki: 6-10
  • Hirata: 6-10
  • Sato: 6-10
  • Enzo: 6-10
  • Hashimoto (Hosei Univ.): 6-10
  • Someya (Hosei Univ.): 6-10
  • Ohishi:
• Travel (Week of 2/13):
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Sato:
  • Enzo:
  • Hashimoto (Hosei Univ.):
  • Someya (Hosei Univ.):
  • Ohishi:

Next meeting

On 2017/2/10(Fri)

VIS F2F: Feb. 17th

March VIS F2F: March 3