VIS Meeting on 2016/2/12

2015/2/12 13:30 -15:00

Kamioka TV conference room + SeeVogh

Participants:

Schedule

• Schedule status (Aso) (Chart)

PR3

• PR3 Installation Status (Takahashi)
  • Wire breaker slit problem

  • #Traverser repair: Repair of the broken ones at Mitaka -> Uraguchi-san is working on it.

  • #Screws to fix the front and back rings the RM were too long, or the tapping in the holes were too short. Couldn't use M5x40. Ordered M5x35 with vent holes. -> Delivered. Remember to replace them

• The frame for the clean bag is bent.
  • Reinformcement design by Mirapro

    • 2D Drawing

    • STEP

    • Assembly image

    • Assembly STEP

Plan for the next week

• Mon: Hang the mirror
• Tue: Hang RM, Cabling
• Wed: RM alignment, Signal check of OSEMs
• Thu: Set the top plate on the assembly frame
• Fri: Hang IM

iKAGRA ETM suspension

• Assembly of the suspension (Ohishi)
• Missing parts (Tatsumi, Takahashi)

  • Insulation tubes for picomotor connectors -> ordered

• Suspension Test (Ohishi)
• Coil winding (Takahashi)
• PRM transportation (Tatsumi)

Plan for the next week

Travel Plans

• Travel (Week of 2/15)

  • Takahashi:Mon-Thu

  • Shoda:Mon-Thu

  • Mark:
  • Fabian:

  • Okutomi:Mon-Thu

  • Fujii:Mon-Thu

  • Ishizaki:
  • Hirata:
  • Ohishi:
  • Sekiguchi: Mon-Thu

VIS F2F 2/19

KAGRA F2F 2/21 - 23

• Travel (Week of 2/22)
  • 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)

• #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's diagram

• 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

BS and SR

• Task listKAGRA/Subgroups/VIS/TypeB/TaskList

  • Kick off meeting within February (Mark)
• BS prism preparation (Mark)
  • Can we make the BS and SR prisms the same: Mark/Hirata klog -> Seems possible to use the same size 5mm

• Can we make SR wire breakers bigger ?

  • We need to decide on how much to widen. Check what happens if we use 5mm tall prism on CAD (Hirata) -> Result

    • Make the slit wider by 3mm will interfere with a M5 threaded hole
      • The hole is needed to keep the mechanical rigidity
      • Can make a new M5 hole somewhere near by ?

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

      • Will talk to Fukushima-san again (Hirata)

      • Wider cuts will break the horizontal balance. Need to check how much compensation mass is reduced.

• Flag design (Mark)

  • 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 is working on 2D drawings. Will finish on Monday.

• Bread board spring (Takahashi): Will talk to Mark after the meeting.

• New accelerometer for IP (Joris)

  • Will give a talk at an NAOJ seminar in March-> Will tell him to contact Akutsu-kun-> done

• #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)

  • Need more frequent interaction with cryogenic people
  • Simulation task is needed. It should be the first priority
  • Blade design task is missing

  • Prioritize the tasks and make a tentative schedule by the next meeting (Takahashi)

• Fishing rod production status (Takahashi)
  • Ordered the material for the blades.
  • Stepping motors were ordered.

  • Mechanical parts remaining to be ordered -> ordered

• #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)

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

Other

• Safety
  • No incident
• Installation procedure document
  • Many people need to contribute to the document. However, we need one person responsible for the consistency of the document.
  • BS installation document: Mark will be the editor.
  • iKAGRA PR3 installation document: Shoda will be the editor
• #GAS blade inspection by Virgo (Takahashi)
  • Shipped the blades. Will get results in 1-2 months.

Next meeting

2015/2/12 (Fri) 13:30 -

The next F2F at Mitaka: 2/19