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• VISMinutes20180720

Agenda/Minutes of the VIS Meeting on 2018/7/20

2018/7/20 13:30 - 15:00

Zoom Meeting

Participants: Mark, Takahashi, Aso, Panwei, Terrence, Fabian, Enzo, Hirata, Pan, Okutomi, Sato, Tanioka, Ishizaki, Fujii, Lucia, Eleonora, Tanaka, Shoda, Kozu

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF/MPP)

Type-A (Takahashi)

Past week report

[SRM]

• Dismounted the top filter for SRM from the IP for Type-A. Packed the IP to the box.
• Combined the top filter and the IP.

[Y-front]

• Transported the IPs from/to the first floor.
• Measured the transfer functions of the BF/F3/F2 by the digital system.
• Cabled in the F1.
• Assembled the cup of F1 (Cu plates, connector plates) and closed the cup.
• Measured the weight of F1.

[X-front]

• Evaluated the ACCs.
• Fixed the cables between the cryo-payload (CP) and the BF at the lower points on the wire.
• Connected the cables to the BF.
• The CP was installed and suspended from the BF.
• Adjusted the height of CP. The height of BF was set to 67.5mm.

Plan for coming weeks

• Setting of the F1 in Y-front.
• Setting of the top filter in X-front.

Type B (Mark)

Report for week of 7/17

• We checked the polarity of the IP LVDTs and flipped coil connections to get the standard arrangement.
• We debugged an issue where one of the LVDT actuators had half the magnets in backwards resulting in no force.
• We calibrated all the PI LVDTs.
• We set the SF damper ring gap.
• We prepped the suspension for craning, moved it into the tank and hooked the LBB damper ring rods.
• Type A merged the SRM F0 with the correct IP, and we moved it out of the way (to the second floor behind the SRM tank).
• We installed more cable clamps on the SR2 PI.

Plan for week of 7/23

• Mark, Enzo, Fabian, Kozu-kun, Terrence, Panwei at Kamioka Mon-Fri.
• Hirata-san at Kamioka Mon-Thu.
• Mirapro moves assembly frame ≈7/25 (Wed).

SR3

• Unlock suspension.
• Rearrange cables.
• Test.

SR2

• Finish PI prep.
• Crane into AF, suspend.
• Start cable routing.

SRM

• Prepare to assemble SRM metal mass (most parts due Wed 7/25).
• Help Mirapro with AF move.
• Start rebuild of top filter of PI #2.

To-Do Lists, Schedule

• KAGRA/Subgroups/VIS/TypeB/ToDoBS

• KAGRA/Subgroups/VIS/TypeB/ToDoSR

• JGW-L1807779 Type B Schedule (SR)

Vacation Info

• Hirata-san at Mitaka 7/27.
• Terrence: 8/24-26 f2f, then returns to Hong Kong.
• Enzo: 9/14 JPS, 9/15 through 10/8 vacation in Chile.

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Ohishi)

Past week report

• IMMT2 screw replacement finished (July 9th-20th).
• Measure TF in the week after next.
• Got a quotation of OMMT/OSTM.

Plan for coming weeks

• Order OMMT/OSTM mechanical parts.

VIS electronics (Tanaka)

Past week report

Plan for coming weeks

Other site works

• July 26 11:30 - 12:30: Monthly crane inspection
• Sept 10(Mon): Planned power outage

Safety

• Incidents: no incident
• Foreseen risks
  • Type-A: Crane work
  • Type-B: Crane work, holes in the 2F

Discussion

• ETMX F2 status

  • klog

  • F2 is stuck
  • We will leave it stuck for O3
• Geophones or Accelerometers ?
  • We will use Geophones for ITMs too.
  • We need to buy 6 more geophones. However the lead time can be long
• SR2 TF optimal load problem
  • To be confirmed in the next week
• SR cable procurement
  • Immediately necessary: 2.4m cables for OSEMs (x2), 5 Type-1 cables
    • Sato-san will order them soon
  • We need to make more Type-1 cables by the end of September
  • We need more cable material for this
  • Takahashi-san is waiting for a quote for PTFE cable material
• VIS talk at the F2F in Toyama U
  • We will request 2 slots

• VIS introduction page

• Survey to point out different aspects that should be covered in a introductory lecture for KAGRA. survey

Travel Plans

• Travel (Week of 7/23):
  • Takahashi: 23 - 27
  • Okutomi:
  • Sato: 23 - 27
  • Lucia: 23 - 27
  • Ishizaki:
  • Mark: 23 - 27
  • Hirata: 23 - 26
  • Enzo: 23 - 27
  • Panwei: 23 - 27
  • Terrence: 23 - 27
  • Shoda:
  • Ohishi:
  • Fujii: 24 - 27
  • Tanioka:
  • Tanaka:
  • Kozu (ICRR): 23 - 26
  • Arai (ICRR):
  • Eleonora: 23 - 26
  • Hashimoto: 23 - 27
• Travel (Week of 7/30):
  • Takahashi:
  • Okutomi:
  • Sato: 7/30 - 8/3
  • Lucia: 7/30 - 8/3
  • Ishizaki:
  • Mark: 7/30 - 8/3
  • Hirata: 7/30 - 8/3
  • Enzo: 7/30 - 8/3
  • Terrence: 7/30 - 8/3
  • Panwei 7/30 - 8/3
  • Shoda:
  • Ohishi:
  • Fujii: 7/30 - 8/3
  • Tanioka: 7/30 - 8/3
  • Tanaka:
  • Kozu (ICRR): 7/30 - 8/3
  • Arai (ICRR):
  • Hatoya: 8/2 - 8/3

Next meeting

On 2018/7/27(Fri)