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 *Schedule discussed with IOO.
  *Design new parts of magnet fixture jig : May 15th-June 2nd
  *Manufacture new parts: June 5th - June 16th
  *Mirror removal from vacuum chamber: June 5th - June 16th
  *Mirrors will be sent to Kashiwa (glueing will be done by Hirose-san)
  *Mirror installation to the vacuum chamber: 3rd -7th July
  *Cabling and performance check: 10th-28th July
  *Doi-san and Kirii-san will help Mirror removal,
   installation, cabling and performance test.

Agenda/Minutes of the VIS Meeting on 2017/4/14

2017/4/14 13:30 -

Participants:

Progress report

Schedule Chart : (PDF,MPP)

  • Type-A:
  • Type-B:
  • Type-Bp:

Type-A (Takahashi)

Past week report

Installation in Y-end:

10th(Mon)

  • Cabling between F2 and F3.

11th(Tue)

  • Delivery of the items for X-end.
  • Preparation for the transportation to X-end.
  • Tuned the F2 again.

12th(Wed)

  • Transportation of the items to X-end by MESCO with Ishizaki.
  • Compressed the blades on the F2. Obtained the frequency less than 0.3Hz.
  • Checked the FR of F2. The rage was +/- 2mm.
  • Checked the cable connection and repaired some connectors.
  • Dropped the ballast mass for F3 into the corrugate tube.

13th(Thu)

  • Checked the receptacle on the cryo-payload for the 3.3m wire.
  • Found and took the dropped ballast mass.
  • Lifted down the EQ stop and put the end plate for the F2 onto the frame lock.
  • Closed the chamber.

14th(Fri)

  • Replacement of the hoist in Y-end.

Plan for coming weeks

  • Clean the clean booth.
  • Setting the F1.
  • The wire for F2 is missing. It will be delivered on 24th.

Type B (Mark)

Past week report

Plan for coming weeks

Type-Bp (Shoda)

Past week report

  • RM TF measured
    • The reason that we could not measure the TF well was the polarization of the PS response are different between the two.
  • EQ stop assembled and the BF has set
    • EQ stop poles got galling. One of the poles could not be removed. Sawada-san will help us to remove it next week.
  • BF GAS calibrated
    • Lots of troubles due to the cables. We need to order them ASAP.
  • IM hanged, balanced
    • Did many iteration. There were no reproducibility of the weight and the keystone height. Also the resonant frequency did not get lower than 0.5 Hz.
    • After we changed the cabling, f0 become ~0.45 Hz without changing the mass. Later we adjusted the mass so that the keystone height is about at the designed position. (f0 did not changed by changing the mass.)
  • Checked the parts and screws for PR2/PRM.
    • Parts used for iKAGRA PR2 preparation are missing.
    • Some screws are not enough.

Plan for coming weeks

  • IRM hanging
  • BF assembly/cabling

IMMT (Ohishi)

Past week report

  • Schedule discussed with IOO.
    • Design new parts of magnet fixture jig : May 15th-June 2nd
    • Manufacture new parts: June 5th - June 16th
    • Mirror removal from vacuum chamber: June 5th - June 16th
    • Mirrors will be sent to Kashiwa (glueing will be done by Hirose-san)
    • Mirror installation to the vacuum chamber: 3rd -7th July
    • Cabling and performance check: 10th-28th July
    • Doi-san and Kirii-san will help Mirror removal,
      • installation, cabling and performance test.

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

  • Main board(WDS main PCB) mounting components side.--> Completed( 4 prototype boards ).

  • Operational test(for WDS main PCB).
    • Completion of S/W write operation test(preliminary test).

Plan for coming weeks

  • Start operation test of system.

Safety

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

Discussion

  • BS BF blades
  • Missing parts

Travel Plans

  • Travel (Week of 4/17):
    • Takahashi: 17-21
    • Shoda: 17-21
    • Mark: 17-21
    • Fabian: 17-21
    • Okutomi: 17-21
    • Fujii:
    • Ishizaki: 17-21
    • Hirata: 17-21
    • Sato: 17-21
    • Enzo: 17-21
    • Sekiguchi(Hosei):17-21
    • Hirayama(Hosei):17-21
    • Perry: 17 - 21
    • Ohishi:
    • Tanaka:
  • Travel (Week of 4/24):
    • Takahashi:
    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:
    • Fujii:
    • Ishizaki:
    • Hirata:
    • Sato:
    • Enzo:
    • Ohishi:
    • Tanaka:
    • Perry:
    • Sekiguchi(Hosei):
    • Hirayama(Hosei):

Next meeting

On 2017/4/21(Fri)

KAGRA/Subgroups/VIS/VISMinutes20170414 (last edited 2017-04-14 17:05:16 by YoichiAso)