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 * We completed the PR2 assembly. But a little bit of re-arrangement is required.
  * All components are suspended, and adjusted their position.
  * We found that the SF GAS optimal resonant frequency is only 0.3 Hz at the keystone height of 70 mm, which is about 5 mm higher than the design. We tried to add more compression on the blades, but it is difficult because of the poor access to the fixing screws of the blades.
   Therefore, we gave up tuning the GAS blades, and now the resonant frequency is 0.42 Hz at the keystone height of 65.5 mm. Actually, it satisfies the requirement.
  * We found the BF GAS resonant frequency became higher because of the cabling between the IRM and BF. We removed IM OSEM cables from the spider cable clamps on the suspension rod. Then the resonant frequency was back to the 0.4 Hz, which is the same as measured before.
   We need more arrangement of the cables.
Line 25: Line 32:
 * Cable fixing (Mon)
 * Check the alignment again (Mon)
 * Installation (Tue-Fri)
 * PRM Gluing on Friday (Fri)

Agenda/Minutes of the VIS Meeting on 2017/7/28

2017/7/28 13:30 -

Participants:

Progress report

Schedule Chart : (PDF,MPP)

  • Type-A:
  • Type-B:
  • Type-Bp:

Type-A (Takahashi)

Past week report

Plan for coming weeks

Type B (Mark)

Past week report

Plan for coming weeks

Type-Bp (Shoda)

Past week report

  • We completed the PR2 assembly. But a little bit of re-arrangement is required.
    • All components are suspended, and adjusted their position.
    • We found that the SF GAS optimal resonant frequency is only 0.3 Hz at the keystone height of 70 mm, which is about 5 mm higher than the design. We tried to add more compression on the blades, but it is difficult because of the poor access to the fixing screws of the blades.
      • Therefore, we gave up tuning the GAS blades, and now the resonant frequency is 0.42 Hz at the keystone height of 65.5 mm. Actually, it satisfies the requirement.
    • We found the BF GAS resonant frequency became higher because of the cabling between the IRM and BF. We removed IM OSEM cables from the spider cable clamps on the suspension rod. Then the resonant frequency was back to the 0.4 Hz, which is the same as measured before.
      • We need more arrangement of the cables.

Plan for coming weeks

  • Cable fixing (Mon)
  • Check the alignment again (Mon)
  • Installation (Tue-Fri)
  • PRM Gluing on Friday (Fri)

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).

  • Experiment schedule(for KAGRA site).-->24th( Tokyo-->Toyama ),25-26th full(KAGRA),27th(Reserve and Toyama --> Tokyo )-->

    • I completed the experiment as planned.
    • The background noise was measured and it was confirmed that there was no problem.
    • I confirmed that there was no problem with connection with the system(HP coil driver and OSEM out).
    • Start production of equipment(As soon as parts are delivered).-->PCB check(Ongoing).

Plan for coming weeks

  • Analysis of experimental results(at 25-26th(KAGRA)).
  • Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).-->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

  • Transportation of the SR PI and PRM traversers

Travel Plans

  • Travel (Week of 7/31):
    • Takahashi:
    • Okutomi: 31 - 4
    • Sato: 31 - 4
    • Ishizaki: 31 - 4
    • Mark: 31 - 4
    • Fabian: 31 - 2
    • Hirata: 31 - 4
    • Enzo:
    • Shoda: 31 - 4
    • Ohishi:
    • Fujii:
    • Tanaka:
    • Kuroki: 31 - 3
    • Hashimoto(Hosei): 31 - 3
    • Yoshioka (Toyama): 1,2,4
    • Kouzu (ICRR): 3,4
  • Travel (Week of 8/7):
    • Takahashi:
    • Okutomi:
    • Sato:
    • Ishizaki:
    • Mark:
    • Fabian:
    • Hirata:
    • Enzo:
    • Shoda:
    • Ohishi:
    • Fujii:
    • Tanaka:
    • Hashimoto(Hosei):
    • Yoshioka (Toyama): 8,9,11
    • Kozu (ICRR):

Next meeting

On 2017/8/4(Fri)

KAGRA/Subgroups/VIS/VISMinutes20170728 (last edited 2017-07-28 14:51:34 by MarkBarton)