VIS Meeting on 2016/3/11

2016/3/11 13:00 -

Kamioka NAOJ Room & SeeVogh

Participants:

Schedule

• Schedule status (Aso)

PR3

• PR3 Operation Status (Fujii)
• Traverser and Stepper motor remote control (Shoda)

Plan for the next week

• Mon:
• Tue:
• Wed:
• Thu:
• Fri:

iKAGRA ETM suspension

• Current status (Ohishi)

Travel Plans

• Travel (Week of 3/14)
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:
• Travel (Week of 3/21)
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:

Electronics

• What are necessary in the next few weeks ?
  • Nothing
• Watch dog system (Tanaka)

• Guradian script for PR3 (Shoda, Okutomi, Fujii) -> DONE(16/03/08)

• Electronics diagram and review

  • Electronics document tree for VIS by Mark (http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4937)

  • Updated PR3 schematic with OpLev wiring (http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4795)

  • Need to think about who will be rensposible for the electronics of each suspension
  • Operation manual for digital system is necessary

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

• #OSEM assembly status (Akutsu)

Type-B

• KAGRA/Subgroups/VIS/TypeB

• Task list/schedule

  • Kick off meeting within February (Mark)
• BS prism preparation (Mark)
  • We decided to order 6 to Shinko-sha

    • Takahashi will call the compnay to have a meeting

    • Aso will check with Ohashi-san about the budget

    • We will use the Sapphire prisms for the test hanging too
    • Since we need to go forward on the BS and we can't make a decision on SR, we decided to go with tall 6.28 mm prisms, which saves adjusting other parts.
• Can we make SR wire breakers bigger ?
  • Status of RM mass modification
• Flag design (Mark)

  • BS Flag Redesign on OneDrive

  • Mark made a smaller foot print flag design "BS Optic Flag Concept 4 (Small Magnet, Small Hole).pdf".
  • Fabian did rigid IM flag design ("TBD")
    • Mark would (still) like to make a test flag with magnetic attachment.
      • Mark designed a tool for aligning the magnetically self-assembling IM flag design (drawing to be posted, hopefully before meeting).
  • Widen the OSEM opening (Akutsu)
• BS dummy optics design (Fabian)

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

  • The above design seems fine.
  • Hirata-san is waiting for quotes from three companies
• IP base clamp (Fabian): Ordered
• Bread board spring (Takahashi): Got a quotation, but expensive. Looking for other companies.
• Issues with lower optical bench and damper ring.
  • Last week's problem solved: support blocks on damper ring can be moved circumferentially to match support blocks on lower optical bench.
  • New problem: damper ring needs to have central hole enlarged to allow passage of suspension during installation.
    • Asking Mirapro to make a modification(Takahashi)
  • New problem: nail-head parts are too short to hook in support blocks - need to be remade longer (and rods shortened to match).
    • Will make a design change.(Takahashi)
• BS Assembly Frame Design (Mark, Hirata)
  • Design is almost complete
  • Need to add some mechanism to hook a load gauge
  • Need to add some attachment points (e.g., ferromagnetic plates) for placing wind-shield panels.
  • With check the structural strength

  • Will talk with Mirapro (contact Nakamura-san : Hirata)-> Mirapro will answer the date after the iKAGRA vacuum work is done this week.

• Making assembly drawings for BS (Hirata)
• #BS gluing jigs (Tatsumi)
• #Not enough crane height problem (Hirata, Saito)
• #BS clean bag (Aso)

Type A

• Task list (Takahashi)

• Thinking about a possibility of testing the long filter chain using the prototype EQ stop in Kashiwa.

• Organize a kick-off meeting in the later half of March, concentrating on the room temperature part. (Takahashi)

• Prototype long maraging rods (heat treated) were delivered from Aoyama
• #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

    • Aoyama 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

• Traverser motor driver (Shoda)
  • Need a box for stepping motor driver. Miyakawa-san is thinking about ordering chassis and boxes for motors. We discussed and agreed that the design of the boxes will be unified. The boxes will be designed and ordered together with those. (16/03/10)
  • Miyakawa-san wants to have a driver and a motor to test
• PR2 Wire breaker problem
  • Prism removal from PR2 (Hirose, Mark)
    • Spare mirror is now back to Kashiwa
• CLIO suspension
  • Ishizaki-san will come to pick it up

Other

• Safety
  • Using Bel wires for the safety of working on the 2F may be good

    • Ishizaki will check if there is clean compatible ones -> Status

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

Next meeting

2016/3/18 (Fri) 13:30 -

Next F2F 2016/4/1