Agenda/Minutes of the VIS Meeting on 2017/1/27

2017/1/27 13:30 -

Participants:

Progress report

Schedule Chart : (PDF,MPP)

Type-A (Takahashi)

• Minutes of Type-A Meeting

• EYV chamber: Top chamber was connected again.
• Pre-isolator: The pre-isolators for SR were packed and moved out of the large clean room on 23rd.
• BF damper: Checked delivered parts on 24th.
• Maraging wire: The wires are delivered on 31st. They are sent to the thermal proccess on 1st February.
  • The 3.3m wire can be treated at Himeji facility of Kinzoku-giken.
• Preparation of installation: The floor of clean booth was covered by stainless steel sheet. The foot holds were assembled.
  • Other large tools (rack, wagon, desk, so on) also were installed into the clean booth.

Type B (Mark)

• Hirata-san:
  • Received many parts from i-ject for BFRM (took pictures and took them into ATC cleanroom).
  • got quotes for PRM/SRM payload from i-ject.
  • Checked quotes and asked for some modifications.)
  • Washed parts (parts for type-A, small hexagons, screws, etc\)
  • Wiped 9 piano wires and sent to Kamioka for PR.
  • pdated Fabian's EQstop parts for BS recoilmass and updated EQstop assy drawings.
• Fabian
  • Worked out geometry for blade adjustment.
  • Designed additional ballast masses for BS BF (and SR).
• Mark and Enzo (at Kamioka)
  • Did two rounds of adjustment of the blades with help from Takahashi-san (one for position, one for frequency)
  • Surveyed the position of the rod using the vertical mode of the bubble level.
  • Got apparent improvement as judged at the IRM-IM EQ stops (but still not perfect).
  • Did one more round of blade adjustments (without Takahashi-san)
  • Got good agreement with IRM-IM EQ stops, so put BF cap on and raised the whole system to check for balance.
  • Found balance still fairly bad: about the same on the -X,+Y diagonal and about half on the +X,+Y diagonal (70 and 30 mm worth of motion of a single trim mass respectively; previous a bit over 70 mm each).
  • From the imbalance torques, calculated the offset of rod as 2.3 mm in the direction 22 degrees to the +X side of -Y.
  • Calculated the blade adjustments required: {-0.325194, -1.79175, 2.11695} mm
  • Prepared to apply adjustments (removed cap etc).

Type-Bp (Shoda)

• Hanging Report: TF measured, BF has been set.

  • EQ stop parts below the BF were assembled.
  • We measured TFs of RM using PSs. (Their alignment was not so easy.)
  • BF was placed on the EQ stop. (Traverser was moved out of the clean room for accesibility.)
  • BF and IM was connected. Not hanged yet.
  • BFRM parts were delivered.

• Next week task: Hang IRM

  • Hang IM and adjust the weight.
  • Hang IRM and balance IM.
  • IRM and set OSEMs.
• A mirror box was sent to a company for modification
• Flag bases were sent to a company for modification
• Winch were sent to Mitaka for inspection

• To do

  • Establish disassemble procedure
  • Buy the new tools

IMMT (Ohishi)

• Put a report here

Watchdog system (Tanaka)

• WDS PCB Design Document.Main rack( Main board + peripheral board )design.

  • Correction of PCB design and correction by DRC(by manufacturer).PDF(JGW-E1706101)

Safety

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

Discussion

• Smaller coil design status update (Aso)

Site work plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

Travel Plans

• Travel (Week of 1/30):
  • Takahashi: 30-2/3
  • Shoda: 31-2/3
  • Mark: 30-2/3
  • Fabian:
  • Okutomi: 30-2/3
  • Fujii:
  • Ishizaki: 30-2/3
  • Hirata:
  • Sato: 30-2/3
  • Enzo: 30-2/3
  • Hashimoto (Hosei Univ.):
  • Someya (Hosei Univ.):
  • Ohishi:
• Travel (Week of 2/6):
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Sato:
  • Enzo:
  • Hashimoto (Hosei Univ.):
  • Someya (Hosei Univ.):
  • Ohishi:

Next meeting

On 2017/2/3(Fri) VIS F2F: Feb. 17th