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Agenda/Minutes of the VIS Meeting on 2017/11/24

2017/11/24 13:30 - 15:00

Participants: Enzo, Shoda, Takahashi, Ohishi, Arai, Sato, Okutomi, Aso, Mark, Hirata, Fabian, Tanaka, Raffaele

Progress report

Schedule Chart

Type-A : (PDF,MPP)

Type-B: (PDF,MPP)

• Type-A: On schedule for the cable replacement (2 days delay expected in the next week)
• Type-B:
• Type-Bp:

Type-A (Takahashi)

Past week report

[X-end]

• Recovered from the blackout.
• Lifted down the EQ stop to release the bottom stopper for BF.
• Set the F2 stage on the frame lock and cabled between F1 and F2.
• Suspended the filter chain from the F1, and checked the load for F1.
• Set the F1 stage on the frame lock and extended the EQ stop.
• Started the cabling between F0 and F1.
• Set the top ring onto the frame lock.

Plan for coming weeks

• X-end: Installation of the pre-isolaotor and reassembly of the BF damper.
• Y-end: Connection to the cryo-payload.

Type B (Mark)

Past week report

• Mark worked on SR2 planning.
• Mark thought through what would be required to swap an optic (e.g., SRM) in situ (JGW-T1707436).
• Hirata-san tried removing disks from IM flags (so we could reuse them in flag bases and make a complete set for SR2) but only got 1 of 4 out.
• Hirata-san ordered more disks for IM flags.
• Hirata-san asked for quotes on SF LBB blades.
• Hirata-san got a reduced quote for the LBB damper rings.
• Hirata-san received and cleaned suspension wires for the SR.
• Fabian worked on the SR mass budget.
• Fabian worked out the COM of the SR2 optic, and Mark used it to derive the proper prism positions.
• Enzo and Kozu-kun worked on control filter design and installation.

Plan for week of 11/27

• Fabian at commissioning workshop
• Hirata-san at Kamioka Tue-Fri to work with Mirapro on SRM LBB installation.
• All others (Mark, Enzo, Shoda-san, Kozu-kun) at Kamioka to start SR2 assembly.
  • Mark from Mon lunchtime.
  • Kozu-kun from Mon lunchtime through Wed.
  • Mirror gluing.
  • SR2 rack setup.

Plan for week of 12/4

• All at Kamioka
  • IM assembly and pico test.
  • Assembly frame alignment and optical table centering.
  • OL setup.

Vacation Info

• Mark 12/22-1/3
• Enzo TBD, probably 12/22-1/3
• Fabian 12/22-1/5
• Hirata-san 12/21-22 (conference)

Type-Bp (Shoda)

Past week report

• Recovered from the power outage
• PRM tried to be released
  • The suspension hits to the EQ stop. We found that the inner frame was tilted.
  • We inserted the sims below the Traverser top plate.
  • The bellows legs of the tank were not perfectly tightened...??

Plan for coming weeks

• PRM release trial again
• Re-alignment of the main beam

OMMT & OSTM (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

• I want to start ordering mass production version.-->*Waiting.

  • The execution of the budget was stopped by AEL.

  • -->Budget execution was allowed.(Meeting at Kamioka.)

• Start of order related works.-->Completed(Coop Univ.Tokyo and anther corp.).

• Operation test of the testing tool for mass production equipment.-->Completed.

• I stay at Toyama on the 19th.And experiment in Kamioka from 20th to 22nd.-->20th I could't experiment by power outage.21th Completed the connection experiment with the digital system. 22nd The cutoff operation test does not go well.-->

  • DC power supply fault(?).
  • I can't see the driver output and sensor output.

Plan for coming weeks

• Plan the operation test again at KAGRA.
• Retest in Mitaka.

• Start ordering mass production version.-->Start preparations.

Other site works

• Commissioning Workshop: Nov. 27 to Dec. 1st

Safety

• Incidents: Dropped a nut inside the PRM chamber.
• Foreseen risks
  • Type-A: Crane work
  • Type-B: No heavy work expected
  • Type-Bp: Be careful with the PRM release.

Discussion

Brainstorming on how to exchange the payload part without completely disassembling the suspension chain

• Type-B assembly drawings

• Type-Bp drawings

• Two possible methods
  • Common part: pull out the suspension from the chamber and put it on the assembly frame.
  • Mark's idea: Make smaller winch systems for TM hanging, which can be used with the BF sitting above the IM.
    • How to align the suspension chain with the sliding rails of the assembly frame is a challenge.
  • Shoda-san's idea: Unhook the rod connecting the BF and IM. Then remove the top part (down to BF) and put it temporarily in the chamber.
    • Is unhooking possible ?
    • Alignment of the top part with the payload part when connecting again may be a challenge.
    • IMRM adjustment may be difficult.
• Conclusion: We should think about the ideas presented today and discuss it again in the next meeting to decide the next action.

Travel Plans

• Travel (Week of 11/27):
  • Takahashi: 27 - 12/1
  • Okutomi: 29 - 12/1
  • Sato: 27 - 12/1
  • Ishizaki: 28 - 12/1 (?)
  • Mark: 27 - 12/1
  • Fabian: 27 - 12/1
  • Hirata: 28 - 12/1
  • Enzo: 27 - 12/1
  • Shoda: 27 - 12/1
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): 27 - 29
  • Arai (ICRR): 27 - 12/1
• Travel (Week of 12/4):
  • Takahashi: 4 - 8
  • Okutomi: 4 - 8
  • Sato: 4 - 8
  • Ishizaki: 4 - 8
  • Mark: 4 - 8
  • Fabian: 5 - 8
  • Hirata: 4 - 8
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): ?
  • Arai (ICRR):

Next meeting

On 2017/12/1(Fri)