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