Agenda/Minutes of the VIS Meeting on 2017/8/25

2017/8/25 13:30 -

Participants:

Progress report

Schedule Charts

• Type-A, Bp: PDF,MPP

• Type-B: MPP, PDF

Schedule summary

• Type-A: Half of week delay
• Type-B:
• Type-Bp: ~3 days ahead

Type-A (Takahashi)

Past week report

[X-end]

21st(Mon)

• Cabling from the F3 to the F2.

22nd(Tue)

• Continued the cabling.
• Calibrated the LVDT in the F2.
• Started the tuning of F2. Initial frequency was 0.7Hz.

23rd(Wed)

• Tuned the F2 with changing the compression of blade. The filter went to bi-stable.

24th(Thu)

• Continued the tuning of F2. The lowest frequency was 0.6Hz.

25th(Fri)

[Y-end]

23rd(Thu)

• Transported the bridge frame to the Y-end entrance.

Plan for coming weeks

• Finish the installation of the Filter2.
• Start the setting of F1.

Type B (Mark)

Past week report

Plan for coming week

Vacation Info

Mark: TBD Mid-Oct

Type-Bp (Shoda)

Past week report

• Hanged IM/IRM
  • We hanged IM and adjusted the weight and balance. Balance is adjusted according to the mirror tilt (1/300) in pitch, and according to the laser marker (horizontal) in roll.
  • We assembled the IRM and adjusted the position. OSEMs are also adjusted. Cabling is also done.
  • We measured the transfer functions, and found the TF in V and P is weird. We found that the OSEM is slightly touching, and re-adjusted.
    • Now we checked the TF in V is working well, while the TF in P is not yet checked. It is because we cannot run PRM and PR3 model simultaneously because of shortage of the power supply. Now IM OSEM signals are used by Yoshida-kun and we could not check yet.
  • Actuation check is done for picomotors and fishing rod.
• BF GAS status
  • The resonant frequency is 0.47 Hz.
  • BF LVDT is also calibrated.
• PRM DGS
  • IO chassis cannot be run with many boards. Miyakawa-san bought the power supply with larger current. We will try it next week.
• BF cap
  • The surface of the BF cap does not seem to be treated... We have many strings of the wipes and clothes on the top of the cap...

Plan for coming weeks

• Final check for the IM
• Assemble from BF stage to the top
• Possibly hang BF

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 -->Delivery completed(Coop Univ.Tokyo).

  • Ex I/O part circuit operation check --> Ok(by Digital I/O board Emulator(switch and Led monitor 32ch).

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 for main board(WDS main board).

Other site works

• 8/28 11:30 - 12:30 crane inspection
• End of Aug. to Nov.: Mozumi entrance will be closed

Safety

• Incidents: no
• Foreseen risks
  • Type-A:
  • Type-B:
  • Type-Bp:

Discussion

Travel Plans

• Travel (Week of 8/28):
  • Takahashi: 28 - 9/1
  • Okutomi: 28 - 9/1
  • Sato: 28 - 9/1
  • Ishizaki: 28 - 9/1
  • Mark: 28 - 9/1
  • Fabian: 28 - 9/1
  • Hirata: 28 - 9/1
  • Enzo: 28 - 9/1
  • Shoda: 28 - 9/1
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei): 28 - 9/1
  • Arai (ICRR): 28 - 9/1
  • Yoshioka (Toyama): 29,30,9/1
  • Kozu (ICRR): 28 - 9/1
• Travel (Week of 9/4):
  • Takahashi: 4-7
  • Okutomi: 4-8
  • Sato: 4-8
  • Ishizaki: 4-8
  • Mark:
  • Fabian
  • Hirata:
  • Enzo:
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanaka:
  • Hashimoto(Hosei):
  • Yoshioka (Toyama):
  • Kozu (ICRR):
  • Arai (ICRR):
  • Kasuya (TITECH):

Next meeting

On 2017/9/1(Fri)