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)