Agenda/Minutes of the VIS Meeting on 2017/8/4

2017/8/4 13:30 -

Participants:

Progress report

Schedule Chart : (PDF,MPP)

• Type-A:
• Type-B:
• Type-Bp:

Type-A (Takahashi)

Past week report

• BF suspended
  • Assembling small hexagons
  • F3 height: 70 mm from EQ-stop
• Load tuning of F3
  • Keystone height: 75.0 mm (initial state: no cables, no primary coils, 4 moving masses)
  • Optimal keystone height: 70.0 mm
  • Optimal ballast weight: ~ 600 g
  • Fine tuning with spectrum measurement
• Cabling
  • Tags attached on the connectors
  • Short connectors made and attached on the BF side
  • Intermediate cables for BF LVDTs ready to set
  • Cabling from BF to F3 almost completed
    • Small adjustment will be applied (e.g. tension, length, ...)
• Calibration of BF LVDT
  • All the LVDTs are calibrated with assignment of primary coil-secondary coils combination
• Calibration of F3 GAS LVDT
  • -4.451 +/- 0.106 [count/um]
• Installation of BF LVDT primary coils
  • Wrong angular phase between BF cap and support rings of primary coils are corrected by rotating BF body (=disc+cap) by 90 deg
  • Side clamp bases are detached during the rotation and re-attached to close positions before rotation

Plan for coming weeks

• Fine load tuning on the F3 GAS
• Movable range confirmation of F3 Fishing Rod
• Tilt adjustment of BF
• Small cabling works (e.g. ones for BF LVDT primary coils)
• Height adjustment of Release Sensors for F3
• Lowering the whole chain

Type B (Mark)

Past week report

Plan for coming weeks

Type-Bp (Shoda)

Past week report

• PR2 Installed!
  • We checked the TFs to confirm the suspension status.
  • With the help of Kimura-san, Sawada-san, and Aso-san, we installed PR2 suspension into the chamber.
  • The FC on the AR side is removed. And suspension is released.
  • The cabling is done. All the signals are online now.
  • The optical bench was suspended, but the distance between the center of the mirror and the upper surface of the optical bench is now about 390 mm, which is 10 mm less than design.
    • We could not make it as design because of un-removable spacers under the optical bench.
  • We found some screws needs to be replaced to the ones with vent holes later.
• PRM mirror preparation
  • Now the gluing is going on.

Plan for coming weeks

• PRM assembly
  • PRM will be shipped to Kamioka. (Mon)
  • Circuit box arrangement and cabling (Mon)
  • New winch will be shipped (Tue)
  • PRM Traverser will be shipped (Tue)
  • PRM IM assembly (Tue)
  • PRM assembly frame status check (Tue)
  • PRM Top plate and Traverser assembly (Tue)
  • Mirror hanging (Wed)
  • RM hanging (Thu)

IMMT (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

• Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->

  • Order electronic parts -->No delivery(Coop Univ.Tokyo).

• Analysis of experimental results(at 25-26th(KAGRA))JGW-E1707035(PDF).

  • Reference (Amp Report on performance test)JGW-E1706863(PDF)

Plan for coming weeks

• Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->Ongoing.

• Start production of equipment-->PCB check(Ongoing).

Other site works

• 8/11-8/15 KAGRA site closed
• 8/23-24 Draft Chamber Installation
• End of Aug. to Nov.: Mozumi entrance will be closed

Safety

• Incidents:
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

• Distance between the optical breadboard and the beam.

Travel Plans

• Travel (Week of 8/7):
  • Takahashi: 7 - 10
  • Okutomi: 7 - 10
  • Sato: 8 - 10
  • Ishizaki: 7 - 10
  • Mark: 7 - 10
  • Fabian:
  • Hirata:
  • Enzo: 8 - 10
  • Shoda: 8 - 10
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei): 7 - 10
  • Yoshioka (Toyama): 8,9
  • Kozu (ICRR): 9 - 10
  • Arai (ICRR): 7 - 10
• Travel (Week of 8/14):
  • Takahashi:
  • Okutomi:
  • Sato:
  • Ishizaki:
  • Mark:
  • Fabian:
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei):
  • Yoshioka (Toyama): 16,18
  • Kozu (ICRR):

Next meeting

On 2017/8/18(Fri)