VIS Meeting on 2016/2/19

2015/2/19 13:30 -

Room 210

Participants:

Schedule

• Schedule status (Aso) (Chart)

PR3

• PR3 Installation Status (Takahashi)
  

  • Current status
• The frame for the clean bag is bent.
  • Mirapro will come on 22nd to make changes.
• Crane may not be available on 2/25 for the crane upgrade to remote control.

Plan for the next week

• Mon: F2F
• Tue: F2F
• Wed: Vacuum installation preparation
• Thu: Vacuum installation
• Fri: Post-vacuum installation work

iKAGRA ETM suspension

• Current status (Ohishi)

Travel Plans

• Travel (Week of 2/22)

  • Takahashi:Wed - Thu (Fri: Akeno for the acceptance of IP from NIKHEF)

  • Shoda:Wed - Fri

  • Mark:
  • Fabian:

  • Okutomi:Wed - Fri

  • Fujii:Wed - Fri

  • Ishizaki:
  • Hirata:
  • Ohishi:

KAGRA F2F 2/21 - 23

• Travel (Week of 2/29)
  • Takahashi:
  • Shoda:
  • Mark:
  • Fabian:
  • Okutomi:
  • Fujii:
  • Ishizaki:
  • Hirata:
  • Ohishi:

Other Mechanical Issues

• Rotation angle of the PR3 mirror
  • 0.786deg counter clockwise from the line connecting the centers of the PR3 and BS chambers.

  • 0.619deg counter clockwise with respect to the chamber (schematic)

    • Currently the mirror is rotated by 0.65deg (measured at the time of the test hanging).

    • This is well within the actuation range of the traverser. -> Will not make any further adjustment.

• #Wire winches
  • Now in the ATC clean room.
  • Asked Ikenue-san to repair it (Takahashi)
• #Clean work procedure
  • Will be discussed at F2F.
• #BF Optimal Weight (Takahashi)
  • #Balast masses: Delivered to Mitaka. Will send them to Kamioka (Hirata)
• #IM wire clamps
  • #Need to send the wire clamps used for the test hanging to I-ject: it was sent to I-ject (Takahashi)
• #Traverser actuation check (Shoda)
• #Wire cleaning (Hirata)

  • Hirata will order 20m more wires. -> Delivered. Will wipe in the next week. -> Finished. Will send to Kamioka soon.

  • Will wash Tungsten wire delivery status -> Delivered. Will wipe in the next week -> Finished. Will send to Kamioka soon.

• #Production of additional PR winches (Akutsu)

  • Shipping status (Takahashi, Hirata) -> Wrapped. Will be shipped with IP in the next week.

• #OSEM assembly status (Akutsu)
• #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

    • All the items are now done or being taken care of
• #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
• Electronics diagram and review

  • Mark: detailed schematics nearly ready to post - D1503615 (full PR3), D1604795 (iKAGRA PR3)

  • Mark: started overview schematic diagram,

• Need to make Guradian script for PR3. Shoda + Fujii and Okutomi will write one after the mechanical installation is finished.
• Watch dog system (Tanaka)
• #LVDT distributor connector problem

  • Miyakawa-san circulated a design of the conversion cable (D9-D15): drawing

• #Digital System (Okutomi, Fujii)
• #Cable status (Takahashi)

  • Need to send more PTFE cable to finish the remaining two -> Will do it in the next week

  • Need to send the cables used for the test hanging once it is finished. -> Will send them once the test hanging is disassembled.

• #Cable check
  • Liu-kun Zhao-kun finished checking all the cables. They found another broken cable.
  • Will send the broken cables together with the other cable related items (Takahashi).

bKAGRA preparation

• Three big categories of the tasks
  • Type-A: Leader = Takahashi: Task list, team members
  • Type-B (BS and SRC): Leader = Mark: Task list, team members
  • Type-Bp modification: Continue discussion (Aso, Raffaele)

Common Issues

Type-B

• Task listKAGRA/Subgroups/VIS/TypeB/TaskList

  • Kick off meeting within February (Mark)
• BS prism preparation (Mark)

  • 5mm prism drawing

  • Confirmed with Hirata-san that BS can use same 5 mm prism as SR (grooves, wire clearance all OK).
  • Confirmed with Tatsumi-san that not a big deal to use smaller BS prism as long as secondary position not changed.
  • Submitted 5 mm prism drawing to company that did LIGO HSTS prism (except grooves), waiting on response.
  • Second company that did LIGO groove cutting not interested in quoting - exploring other US companies.
  • Should contact Shinko-sha again (Takahashi)
• Can we make SR wire breakers bigger ?

  • Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata) -> Result

    • Two concerns
      • The rework may bend the wing shaped parts.
      • The P.C.D. of the new screw holes may not coincide exactly with the other existing holes
    • Consult with Fukushima-san again. Takahashi will contact Fukushima-san

    • Do we need to widen the slits for PRC RMs ? -> Depends on how difficult it is to rework the RM.

    • Wider cuts will break the horizontal balance. Need to check how much compensation mass is reduced (Hirata) -> 2mm reduction will be necessary. We can do this.

• Flag design (Mark)
  • Shorter flag is desirable ?

  • Mark will sort out the ideas and organize a specialized meeting.-> will present an updated version in the next meeting.

• IP base clamp (Fabian): Picture -> Reduce the number of clamps-> Hirata-san finished 2D drawings. Trying to get quotation now.

• Bread board spring (Takahashi): Hirata-san is getting quotations.
• #BS Assembly Frame Design (Aso, Hirata)
• #BS gluing jigs (Tatsumi)
• #Not enough crane height problem (Hirata, Saito)
• #BS clean bag (Aso)

Type A

• Task list (Takahashi)

• #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

    • Aoshima 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

• PRM traverser
  • Postpone the production to the next FY until we know the details of the modification.

  • Tell Uraguchi-san about the above plan (Takahashi) -> done

• #PR2 Wire breaker problem
  • Prism removal from PR2 (Hirose, Mark)
    • Not yet ready

Other

• Safety
  • No incident
• #GAS blade inspection by Virgo (Takahashi)
  • Shipped the blades. Will get results in 1-2 months.

Next meeting

2015/2/19 (Fri) 13:30 - @ Mitaka