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  * One cable found to be broken. __'''Will send it back to the company -> status '''__   * One cable found to be broken. __'''Will be sent by 25th. '''__

VIS Meeting on 2015/12/18

2015/12/18 13:30 -

Kamioka TV conference room + SeeVogh

Participants: Joris, Fabian, Hirata, Mark, Fujii, Shoda, Okutomi, Akutsu, Tatsumi, Raffaele, Takahashi

Schedule

  • Schedule status (Aso)
    • Latest schedule chart
    • PR2 preparation may take much longer
    • Need to consider a possibility of installing an ETM first.

PR

  • Test Hanging Status (Takahashi)
    • Installation into vacuum
      • Removed the galled jacks. Used the crane to gently sit the suspension on the frame.
      • Two IM OSEM flags were broken. Taken out.
      • Now the suspension is freely hanging.
    • Blowing test
      • Suspension was fine.
      • The interface plate was not easily accessible with the air gun.
    • Hammering test
      • Lowest resonance ~ 15Hz

      • ATC people wants to have the results and the test condition (Takahashi)

    • Cabling
      • All the cables are connected. Checked the connection except for the traverser.
      • Used cable ties to fix the cables on the ceiling of the clean booth.
      • Connecting the picomotor driver to the network for remote control
    • EQ stop release
      • Leveled the IM
      • BF tilt seems to be fine

  • OpLev for PR3

    • Pillars were set up.
    • View ports are there.
    • QPD preparation is the remaining thing. Will try next week.
  • PR2 Status (Mark, Fabian)
    • Collected screws
    • RM carriage assembled
    • RM assembled
    • IM is on the frame. Started alignment.
    • What can we do before the PR2 arrives
      • Preparation of the flags
        • Sand the Ni-plating on the magnets in Mitaka on Monday (Fabian)
        • Glue the flags on Tue

        • Need to order spare flag bases: 6 of them (Takahashi) -> Asking quotation (12/21)

  • We need to secure things for water using Sunoko (duckboard).
  • Location of the EQ stop pillars (Takahashi)

    • Takahashi will tell Hirata the proper locations of the pillars. -> Suggested location is indicated in the assy drawings.

  • Digital System (Okutomi, Fujii)
    • Created a copy of PR3 model for PR2.
  • 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) -> not yet.

    • Balast mass design: Fabian will talk with Hirata on Monday.

  • Traverser actuation check (Shoda)

    • Need to check the condition of the traverser. Shoda will call Uraguchi-san from the site on Mon. and ask for his instruction on how to check the traverser.

    • Cabling is now done. We can test it.
  • Traverser stop mechanism

    • Procurement status (Takahashi): Parts were delivered. Clean the parts on Monday (Hirata).

  • 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 -> Yes we can use them. Will order more (Aso)

    • 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 -> Will be sent by 25th.

      • 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 be sent by 25th.

  • 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) -> The quotation was obtained (12/21).

    • Propose to have a special meeting to Hirose-san (Aso)

  • Wire cleaning (Hirata)

    • Hirata will order 20m more wires. -> Delivered. Will wipe in the next week.

    • Will wash Tungsten wire delivery status -> Delivered. Will wipe in the next week.

  • Production of additional PR winches (Akutsu)
    • 650um Tungsten wire test with 9.2kg is fine

    • Will test with 200um wires on Monday (7.2kg) with improved mass clamps (Hirata).

  • RM compensation mass
    • Design status (Fabian): Now done.

    • Need to buy screws for fixing the compensation masses. Takahashi will check the lengths of screws. -> M6-16mm and M6-20mm are necessary.

  • 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) -> not yet.

  • 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

  • Missing items(to be purchased soon)

    • Picomotor drivers (Takahashi)

    • Signal generators for LVDTs (Aso)

    • Serial-Ethernet converter: 7 more (Shoda)

    • Traverser motor driver (Shoda)

    • Turn backles (bigger and eye). Smaller shackles. (Aso)

  • LVDT(Joris)
    • Fixing LVDTs
  • Next week (from 12/21) plan
    • Test hanging
      • Mon: Traverser check. QPD preparation.
      • Tue: Transfer function measurements
      • Wed:
      • Thu: Orientation and height check
      • Fri: Orientation and height check
    • PR2
      • Mon: Fabian will sand the magnets in Mitaka. Mark will align the IM
      • Tue: Preparation of the clean booth, bring in electronics to the tunnel.
      • Wed:
      • Thu: Traverser assembly preparation
      • Fri: Traverser assembly preparation
  • Travel (Week of 12/21)
    • Takahashi: Mon-Tue
    • Shoda: Mon-Fri
    • Mark: Mon-Tue
    • Fabian: Thu-Fri
    • Okutomi: Mon-Tue
    • Fujii: Mon-Fri
    • Ishizaki:
    • Hirata:
    • Ohishi:
  • Travel (Week of 1/4)
    • Takahashi: Mon-Thu
    • Shoda: Mon-Thu
    • Mark: Mon-Thu
    • Fabian: Tue-Thu
    • Okutomi: Mon-Tue (available)
    • Fujii: -
    • Ishizaki:
    • Hirata:
    • Ohishi:

* Joris: 1/11-1/29

* 1/18 Sekiguchi-kun's PhD defense

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. PR one was too weak. Make it stronger

Other

  • bKAGRA preparation

    • List of tasks for: BS, Type-A, Type-Bp modification, IMMT (Takahashi) by the end of the next week. 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: Check the deadline for Virgo (Takahashi)

  • 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

    • If we can get help from ATC to measure the optimal load in Mitaka, it will be good.

      • Takahashi will make a plan for the optimal load check and ask ATC. The start of the Type-A install will be Oct. 2016

    • 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)

      • How to test it ?
        • Use the unused assembly frame for Type-B ?
  • Safety at the site (Takahashi, Ishizaki)
    • Steps and clean belts will be ordered very soon.

Next meeting

2015/12/25 (Fri) 13:30 -

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

KAGRA/Subgroups/VIS/VISMinutes20151218 (last edited 2015-12-21 14:28:34 by RyutaroTakahashi)