Agenda/Minutes of the VIS Meeting on 2017/11/17

2017/11/17 13:30 - 14:15

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

Progress report

Schedule Chart

Type-A : (PDF,MPP)

Type-B: (PDF,MPP)

• Type-A: On schedule for the cable exchange (a bit faster than expected)
• Type-B: Preparing for the SR2 assembly.

Type-A (Takahashi)

Past week report

[X-end]

• Started the replacement of cables from 15th.
• Dismounted the pre-isolator.
• Removed the cables above the F1.
• Removed some screws from the inside of F1.

[ITM]

• The items from Akeno and Mitaka were delivered on 14th.
• Transported the bridge frame from the X-end to the center area on 14th.
• Lifting up the items to the 2nd floor by MESCO on 17th.

Plan for coming weeks

• X-end: Reassembly of the EQ stop and the cabling from 20th.
• Y-end: Connection to the cryo-payload from 27th.

Type B (Mark)

Past week report

• Mark and Fabian did a huge cleanup of the SR2 area and prepared a workspace for assembling the IM.
• Fabian did a stocktake of the screws for the SR.
  • We have all we need for the IM, except one type that can be added after the rest of the IP is assembled.
  • We have most of what we need for the rest of the payload, and Hirata-san has ordered the others.
• Hirata-san worked on SR procurement:
  • Suspension wire
  • SR additional parts (compensation masses, clamps etc)
  • Regular, SDC and BUMAX screws.
  • Additional machining on the BS sapphire prism jig to allow it to be used on the PR/SR mirror box.
  • LBB blade design.
• Enzo and Kozu-kun (with help from Fujii-kun) worked on export from SUMCON to Matlab, and on filter design.

Plan for week of 11/20

• Holiday on Thu 3/23
• All at Mitaka.
• SR procurement, planning (Mark, Hirata-san)
• SR mass budget (Fabian)
• BS modeling filter design (Enzo, Kozu-kun)

Plan for week of 11/27

• Fabian at commissioning workshop
• Hirata-san at Kamioka to work with Mirapro on SRM LBB installation.
• All others at Kamioka to start SR2 assembly.

Type-Bp (Shoda)

Past week report

• Top rid of PR2 and PR3 vacuum tank were fixed
  • Note that the feedthrough flanges are not closed yet.
  • During the fixing, we accidentally moved the injection beam of the Oplev. Alignment was lost.
  • We need to re-align the main beam. So far, we are planning to do it in the week of the commissioning WS.
• PR mirror position was measured by FARO.
  • The position of the mirror is off from the design by:
    • PR2: (-9.4, +0.5, -6.4)
    • PR3: (-3.5, -0.5, -4.9)
    • PRM: (+4.7, 4.6, -1.5) Note: PRM is fixed
      • Note that these values are relative to the side flange of the vacuum tank at the HR side. x is the norm of the flange surface, and z is the norm of optical bench.

Plan for coming weeks

• Release PRM. Setup the oplev
• WD test

OMMT & OSTM (Ohishi)

Past week report

• Checked and ordered missing parts of hanging jig.
• Checked glueing jig parts.

Plan for coming weeks

• Order some glueing jig parts that have defect.

• Revise Type-C assembly manual.

Past week report

Plan for coming weeks

Other site works

• Crane inspection: Nov. 22 11:30 - 12:30
• Commissioning Workshop: Nov. 27 to Dec. 1st

Safety

• Incidents: no incident
• Foreseen risks
  • Type-A: Crane work
  • Type-B: no Kamioka work
  • Type-Bp: Do not bump the mirror in PRM release.

Discussion

• We will have a brainstorming on how to swap the payload or mirror quickly in the next week.

Travel Plans

• Travel (Week of 11/20):
  • Takahashi: 22 - 24
  • Okutomi: 20 - 24
  • Sato: 20 - 24
  • Ishizaki: 20 - 24
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda: 20 - 22
  • Ohishi:
  • Fujii:
  • Tanaka: 20 -22
  • Kozu (ICRR):
  • Arai (ICRR): 20 - 24
• Travel (Week of 11/27):
  • Takahashi: 27 - 12/1
  • Okutomi: 29 - 12/1
  • Sato: 27 - 12/1
  • Ishizaki: 27 - 12/1
  • Mark: 27 - 12/1
  • Fabian: 27 - 12/1
  • Hirata: 27 - 12/1
  • Enzo: 27 - 12/1
  • Shoda: 27 - 12/1
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Kozu (ICRR): 27 - 12/1
  • Arai (ICRR): 27 - 12/1

Next meeting

On 2017/11/24(Fri)