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  * The direct feedback paths from TM OpLev to the upper stages are reimplemented.
  * The generic feedback path (OLSERVO, so-called band-path comb paths) updates:
   * The number of channels increased: 12ch -> 24 ch
   * The output paths increased: only (L, P, Y) DoFs -> all controllable DoFs in the payload
  * Driving matrices have been separated for each of local-based and global-based signals.
  * Decoupling matrices for the photo-reflective sensors have been prepared.
   * The diagonalization of these matrices is not implemented yet. We'll do at the moment of necessity.
  * The messy overview screen was rearranged.
 * Damping filter implementation on the payload is ongoing.
  *

Agenda/Minutes of the VIS Meeting on 2019/7/12

2019/7/12 13:30 -

Zoom Meeting

Participants:

Progress report

Type-A (Takahashi)

Past week report

  • Updated the Real-time model & medm for the Type-A payload.

    • The direct feedback paths from TM OpLev to the upper stages are reimplemented.

    • The generic feedback path (OLSERVO, so-called band-path comb paths) updates:

      • The number of channels increased: 12ch -> 24 ch

      • The output paths increased: only (L, P, Y) DoFs -> all controllable DoFs in the payload

    • Driving matrices have been separated for each of local-based and global-based signals.
    • Decoupling matrices for the photo-reflective sensors have been prepared.
      • The diagonalization of these matrices is not implemented yet. We'll do at the moment of necessity.
    • The messy overview screen was rearranged.
  • Damping filter implementation on the payload is ongoing.
  • Study on the deformation of base plate in the GAS filter with the ATC staff.

Plan for coming weeks

Type-B

Past week report

Plan for coming weeks

Type-Bp

Past week report

Plan for coming weeks

OMMT & OSTM (Takahashi)

Past week report

  • Asking quotations for the modification parts in the mirror gluing jig and the standoff.
  • Preparing for shipping of the suspension.
  • The mirror will be ready in October.

Plan for coming weeks

  • Test the OSEMs at the site.
  • Confirm some dimensions on the present OMMT/OSTM suspensions.

VIS electronics

Past week report

Plan for coming weeks

Other site works

Safety

  • Incidents:

Discussion

  • VIS talk slots at the August F2F

Travel Plans

  • Travel (Week of 7/15):
    • Takahashi: 16-19
    • Sato:
    • Hirata:
    • Shoda:
    • Fujii:
    • Tanaka:
    • Terrence:
  • Travel (Week of 7/22):
    • Takahashi:
    • Sato:
    • Hirata:
    • Shoda:
    • Fujii:
    • Tanaka:
    • Terrence:

Next meeting

On 2019/7/19(Fri)

KAGRA/Subgroups/VIS/VISMinutes20190712 (last edited 2019-07-12 14:45:51 by YoichiAso)