VIS Meeting on 2016/3/4

2016/3/4 13:30 -

Kamioka NAOJ Room & SeeVogh

Participants:Takahashi, Ishizaki, Hirata, Mark, Fabian,Aso, Tanaka, Akutsu

Schedule

• Schedule status (Aso) (Chart)

PR3

• PR3 Installation Status
  • Mechanical Installation is done
  • Damping control is mostly working
  • Actuator control
    • Traverser remote control needs to be done

Plan for the next week

• Mon:Okutomi will stay

• Tue:Okutomi will stay

• Wed:
• Thu:
• Fri:

iKAGRA ETM suspension

• Current status (Ohishi)
  • Picomotor check is to be done
  • ETMX first contact peeling did not go well. Small pieces remaining
  • ETMY: we found big scratches on the HR surfaces
  • Will continue with the current status

Travel Plans

• Travel (Week of 3/7)

  • Takahashi:Mon-Tue

  • Shoda:
  • Mark:
  • Fabian:

  • Okutomi:Mon-Tue

  • Fujii:
  • Ishizaki:

  • Hirata:10-11 not available

  • Ohishi:
• Travel (Week of 3/14)
  • 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)
  • PCB delivered
  • Operation check of the prototype board is done
  • Will stuff the PCB for the mass production board next
• #Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.
• 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 resposible 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

Type-B

• KAGRA/Subgroups/VIS/TypeB

• Task list/schedule

  • Kick off meeting within February (Mark)
• BS prism preparation (Mark)
  • Now have quotes for both prisms and grooves for orders of both 4 and 12:

• Shinko-sha quotation
  • 260KJPY for two. Lead time = 1.5month
• 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 saphhire prisms for the test hanging too

• Can we make SR wire breakers bigger ?
  • We will ask ATC to widen one RM first.
  • Brought back one RM to Mitaka
    • It will take more than 1 month to machine (Fukushima-san)
    • Iwashita-san is preparing some tools for the machining. May take more than one month.
• Flag design (Mark)

  • BS Flag Redesign on OneDrive

  • Could make BS optic flag shorter by about 4 mm ("BS Optic Flag Concept 3 (Small Magnet, Short)") but it would cause work for Tatsumi-san for little benefit.
  • Recommend "BS Optic Flag Concept 2 (Small Magnet)"

  • Will make a smaller foot print flag design (Mark)

  • Fabian did rigid IM flag design ("TBD")
    • Mark would like to make a test flag with magnetic attachment.
    • Use a key to determine the rotation angle of the flag
  • 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)

  • Take photos of the BS area to see where is the optimal location of the assembly frame (Aso)

• 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

• 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
      

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

Next meeting

2016/3/11 (Fri) 13:30 -

Next F2F 2016/4/1