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  * I suggest to gain weight margine by reducing the moving masses on the cap.   * I suggest to gain weight margin by reducing the moving masses on the cap.

Minutes of the VIS Meeting on 2016/6/17

2016/6/17 13:30 - 15:00 @ Room 210

Participants:

Progress report

Schedule Chart (PDF,MPP)

Type-A (Takahashi)

  • Put a report here

Type-B (Mark)

  • Put a report here

Type-Bp (Shoda)

  • Create a rough new LVDT model -> Saito-san found that they fit around the BF.

  • Assembly plan for Modified Type-Bp: JGWdoc -> asked Saito-san to do more upgrade.

    • Upgrade points: some screw sizes were wrong. Move the security poles inside so that we can fix them from the top.etc...
  • I found that we cannot load on the BF than I expected before.
    • The model of the BF was updated recently. When we decided the plan BF, the model was wrong, which means that the mass was wrong.
    • The load on the SF GAS = Tha mass on the BF GAS: 53.5 kg + IRM: 9.0 kg + BF: 100.2 kg = 162.7 kg
    • The optimal load on the SF GAS is 164.3 kg (minimum for the SFs whose caps cannot be closed).
    • The weight of the actuator base is currently 1.9 kg (w/o coils and magnets).
    • I suggest to gain weight margin by reducing the moving masses on the cap.

IMMT (Ohishi)

  • Put a report here

Watchdog system (Tanaka)

  • Put a report here

Safety

  • Any issue this week ?

Issues

  • BS flag/prism glueing problem (Mark)
  • LVDT for BF damping (Shoda, Raffaele)
  • Dummy payloads for Type-A (Takahashi)
    • How difficult it is to make mirror mounted payloads

Site work plan for the next week

  • Mon:
  • Tue:
  • Wed:
  • Thu:
  • Fri:

BS crane will not be available: 13th -14th of June

Travel Plans

  • Travel (Week of 6/20):

    • Takahashi:19-21 (Acceptance of SFs, check items, move things around and so on)

    • Shoda:

    • Mark:20-24 (preparation for BS installation)

    • Fabian:20-24 (preparation for BS installation)

    • Okutomi:
    • Fujii:
    • Ishizaki:

    • Hirata:20-24(not yet decided)

    • Ohishi:
  • Travel (Week of 6/27)
    • Takahashi:
    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:
    • Fujii: 27-29
    • Ishizaki:
    • Hirata:
    • Ohishi:
    • Sato:

July 4 - 8: Takahashi, Ishizaki, Sato (site check for the installation of Type-A)

Mark is away: July 8-20

Next meeting

2016/6/24(Fri) 13:30 -

Next F2F 7/8

KAGRA/Subgroups/VIS/VISMinutes20160617 (last edited 2016-06-20 15:24:09 by MarkBarton)