• KAGRA
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• VISMinutes20151218

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 -> no respons

• 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
  • 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

• 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