VIS Meeting on 2015/12/18

2015/12/18 13:30 -

Kamioka TV conference room + SeeVogh

Participants:

Schedule

• Schedule status (Aso)
  • Latest schedule chart

PR

• Test Hanging Status (Takahashi)
  • Installation into vacuum
  • Blowing test
  • Hammering test
  • Cabling
  • EQ stop release
• PR2 Status (Mark, Fabian)
  • What can we do before the PR2 arrives
    • Preparation of the flags

      • Sand the Ni-plating on the magnets before gluing to increase the adhesion ? -> Preparation Status

      • Need to order spare flag bases: 6 of them (Takahashi) -> Status

• Location of the EQ stop pillars (Takahashi)
  • Takahashi will tell Hirata the proper locations of the pillars.
• Digital System (Okutomi, Fujii)
• BF Optimal Weight (Takahashi)
  • Check the optimal load for the ETM BFs at the ATC: Need to be done before the end of Jan. Arrange with ATC people (Takahashi)
  • Balast mass design
• Traverser actuation check (Shoda)
  • Now we may move the traverser in the air a little bit.
  • Will test it at some point.
• Traverser stop mechanism
  • Procurement status (Takahashi)
• Clean work procedure

  • Need to check with Miyoki-san when the clean suits will be delivered (Aso) -> 1/15

  • Ask Hirose-san about better wiping cloths (Aso): Texwipe Vectra Alpha 10 or TX8410. Asking if he has enough or we should order them.
  • KAGRA should have a special meeting for clean requirements: Aso had a meeting with Saito-san and Hirose-san. But the meeting was interrupted by a car accident. Will propose another meeting.
• PR CAD model and assembly drawings (Hirata)
  • Need to give the rotation angle of the traverser top plate (Aso)
• Cable status (Takahashi)
  • All the cables except for two cables were delivered.

    • Need to send more PTFE cable to finish the remaining two -> status

    • Need to send the cables used for the test hanging once it is finshed.

  • Made a cable list -> Put a link to the excel file on Wiki. Takahashi will improve the table.

• Cable check
  • 70% done.

  • One cable found to be broken. Will send it back to the company -> status

• Call for shift for assembly help (Takahashi)

  • Made a call for shift for helping the installation works -> status

• PR2 wire breaker problem (Tatsumi)
  • Removal of the wire breakers
  • SUS wire breaker order status (Takahashi)
• Wire cleaning (Hirata)

  • Hirata will order 20m more wires. -> status

  • Will wash Tungsten wire delivery status
• Production of additional PR winches (Akutsu)
• RM compensation mass
  • Design status (Fabian): Do it later.
  • Need to buy screws for fixing the compensation masses. Takahashi will check the lengths of screws.
• PR Optical Bench (Akutsu)
  • For PR2, we do need to raise the optical bench.
    • Delivery date for the screws: Dec. 21
    • PR2 vacuum installation will be Jan. 19
• OSEM assembly status (Akutsu)
  • OSEM screw length issue
    • We have a lot of M5x20 BUMAX screws

    • Do we need to use longer ones ? -> Shoda will check with the actual test mass RM -> Seems OK (5mm spare length)

• RM production (Takahashi)

  • What to do with the dirty RMs ?: Check with ATC if re-polishing the rough surface is possible or not (Takahashi) -> status

• Test hanging vacuum installation
  • What needs to be done when the suspension is inside the chamber ?
    • Transfer function measurement
    • Spectrum
    • Check the orientation of the mirror
    • Check the height with laser marker
• List of what should be changed for PR3 hanging
  • People should share ideas whenever they come up with missing thigns.
  • Shoda made a spread sheet for keep tracking the ideas

    • https://docs.google.com/spreadsheets/d/1zZaLObWjDSEOTrr85Hz0ApXxEUChK3xJ_chk0f7r5nY/edit?usp=sharing

• Next week (from 12/21) plan
  • Test hanging
    • Mon:
    • Tue:
    • Wed:
    • Thu:
    • Fri:
  • PR2
    • Mon:
    • Tue:
    • Wed:
    • Thu:
    • Fri:
• Travel (Week of 12/21)
  • Takahashi: Thu-Fri
  • Shoda: Mon-Fri
  • Mark: Mon-Tue
  • Fabian: Mon-Fri
  • Okutomi: Mon-Fri
  • Fujii: Mon-Fri
  • Ishizaki:
  • Hirata:
  • Ohishi:
• Travel (Week of 1/4)
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:

* Joris: 12/7 - 12/18

BS

• BS Assembly Frame Design (Aso, Hirata)
• BS flag design (Mark, Fabian)
• BS gluing jigs (Tatsumi)
• Not enough crane height problem (Hirata, Saito)
• IP base clamp (Fabian)
• Bread board spring (Takahashi)
• BS clean bag (Aso)

ETM

• ETM assembly frame (Aso)
  • Got a quotation
  • Need to include a clean bag frame

Other

• bKAGRA preparation
  • List of tasks for: BS, Type-A, Type-Bp modification, IMMT (Takahashi) Set up a Wiki page (Aso)
• Watch dog system (Tanaka)
  • Will present at an AEL meeting.
• GAS blade inspection by Virgo (Takahashi)

  • To be shipped soon -> status

• Request to the ATC for the next year

  • Production of the blades of the Type-A BF: We should check the consistency of the optimal load at the TAMA prototype experiment and G&M measurements (SF and TF) (Takahashi) -

    • SF: G&M 164.7kg, TAMA: 165.3kg

    • TF: G&M 276kg, TAMA: 278kg

  • No obvious reason to distrust G&M's measurements

  • Should consider in-situ measurement procedure of the optimal load during the installation of Type-A
• Safety at the site (Takahashi, Ishizaki)

Next meeting

2015/1/8 (Fri) 13:30 - F2F@Mitaka