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 * Issue with adjustment screws on lower optical bench (bench can only be adjusted down from nominal due to lack of holes in bench below new position of screws holding wires)  * Issue with adjustment screws on lower optical bench (bench can only be adjusted down from nominal due to lack of holes in bench below new position of screws holding wires) [[attachment:Test.pdf]]

VIS Meeting on 2016/2/26

2015/2/26 13:30 -

Kamioka NAOJ Room & SeeVogh

Participants:

Schedule

  • Schedule status (Aso) (Chart)

PR3

Plan for the next week

  • Mon: Suspenion control tuning
  • Tue: Suspenion control tuning
  • Wed: Suspenion control tuning

  • Thu:Suspenion control tuning

  • Fri: Suspenion control tuning

iKAGRA ETM suspension

  • Current status (Ohishi)

Travel Plans

  • Travel (Week of 2/29)
    • Takahashi:
    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:
    • Fujii:
    • Ishizaki:
    • Hirata:
    • Ohishi:
  • Travel (Week of 3/7)
    • Takahashi:
    • Shoda:
    • Mark:
    • Fabian:
    • Okutomi:
    • Fujii:
    • Ishizaki:
    • Hirata:
    • Ohishi:

Other Mechanical Issues

  • #OSEM assembly status (Akutsu)
  • #Missing items(to be purchased soon)

    • #Traverser motor driver (Shoda) -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime.

Electronics

  • What are necessary in the next few weeks ?
    • Nothing
  • Watch dog system (Tanaka)
  • Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.
  • #Electronics diagram and review

bKAGRA preparation

  • Three big categories of the tasks
    • Type-A: Leader = Takahashi
    • Type-B (BS and SRC): Leader = Mark
    • Type-Bp modification: Leader = Shoda

Common Issues

Type-B

  • Task listKAGRA/Subgroups/VIS/TypeB/TaskList

    • Kick off meeting within February (Mark)
  • BS prism preparation (Mark)
    • Second company that did LIGO groove cutting not interested in quoting - exploring other US companies.
    • Should contact Shinko-sha again (Takahashi)
      • 260KJPY for two. Lead time = 1.5month
  • Can we make SR wire breakers bigger ?

    • Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata) -> Result

      • Two concerns
        • The rework may bend the wing shaped parts.
        • The P.C.D. of the new screw holes may not coincide exactly with the other existing holes
      • Consult with Fukushima-san again. Takahashi will contact Fukushima-san
        • 型振り放電加工機 may be better
        • Will test machine the dirty recoil mass. Will have another meeting with Fukushima-san (Takahashi)

      • Do we need to widen the slits for PRC RMs ? -> Depends on how difficult it is to rework the RM.

  • Flag design (Mark)

    • Mark's drawings

    • Make shorter by small changes
    • Widen the OSEM opening (Akutsu)
  • BS dummy optics design (Fabian)

  • IP base clamp (Fabian): Reduce the number of clamps-> Hirata-san finished 2D drawings. Trying to get quotation now.-> Still waiting for the quotation.

  • Bread board spring (Takahashi): Hirata-san is getting quotations.Asked quotation with the above one all at once.

  • Issue with adjustment screws on lower optical bench (bench can only be adjusted down from nominal due to lack of holes in bench below new position of screws holding wires) Test.pdf

  • #BS Assembly Frame Design (Aso, Hirata)
  • #BS gluing jigs (Tatsumi)
  • #Not enough crane height problem (Hirata, Saito)
  • #BS clean bag (Aso)

Type A

  • Task list (Takahashi)

  • #Type-A Filters Optimal Load Measurements

    • #Takahashi will make a plan for the optimal load check and ask ATC.-> Check two filters per month from April 2016. -> Will be presented to the ATC steering committee.

    • #How to manufacture the long maraging wires ?
      • One prototype was machined by Ojima

      • Aoshima can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation.

      • How to test it ?
        • We can use the prototype assembly frame in TAMA.

Type-Bp modification

  • PR2 Wire breaker problem
    • Prism removal from PR2 (Hirose, Mark)
      • We need to send the spare mirror and the containers back to Kashiwa soon.
        • Bring back to Mitaka on 2/26.

      • Bring back CLIO suspension too (Takahashi) -> Not this time

Other

  • Safety
  • #GAS blade inspection by Virgo (Takahashi)
    • Shipped the blades. Will get results in 1-2 months.

Next meeting

2015/3/4 (Fri) 13:30 -

Next F2F 2016/4/1

KAGRA/Subgroups/VIS/VISMinutes20160226 (last edited 2016-02-27 06:22:30 by YoichiAso)