VIS Meeting on 2016/2/26

2015/2/26 13:30 -

Kamioka NAOJ Room & SeeVogh

Participants:

Schedule

• Schedule status (Aso) (Chart)

PR3

• PR3 Installation Status

  • http://klog.icrr.u-tokyo.ac.jp/osl/?r=831

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

  • Mark: detailed schematics nearly ready to post - D1503615 (full PR3), D1604795 (iKAGRA PR3)

  • Mark: started overview schematic diagram,

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)

  • http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4811

  • Finalizing the design by the end of next week

• 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)
• #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