• KAGRA
• Subgroups
• VIS
• VISMinutes20170616

Agenda/Minutes of the VIS Meeting on 2017/6/16

2017/6/16 13:30 - 15:00

Participants: Takahashi, Sato, Aso, Fujii, Okutomi, Ohishi, Tanaka, Akutsu, Shoda, Enzo, Fabian, Hirata, Mark, Raffaele, Ishizaki

Progress report

Schedule Chart : (PDF,MPP)

• Type-A: 0.5 week delay
• Type-B: 8 weeks delay
• Type-Bp: 1 week delay

Type-A (Takahashi)

Past week report

Installation in Y-end:

12th(Mon)

• Adjusted the tilt of BF by moving masses.
• Checked geometry around the BF.

13th(Tue)

• Adjusted the height of damper ring for the BF.
• Adjusted the yaw rotation of BF.
• Attached the LVDT coils and checked the movable range.
• Attached the cable clamps onto the TF.
• Removed the wire clamp.

14th(Wed)

• Tuned the TF to frequency less than 0.2Hz changing the compression of blades.
• Assembled the cables for BF damper.
• Cabled from the F1 to the TF.

15th(Thu)

• Made flip cables.
• Cabled around the BF damper.
• Tuned the LVDT driver.
• Checked the assembly of geophone pods.

16th(Fri)

• Prepared for the power outage.

Plan for coming weeks

• Check of the BF damper.
• Cabling to the feedthroughs.
• Setting of the ACCs.
• Preparation in X-end.

Type B (Mark)

Past week report

At Kamioka (Mark, Fabian, Enzo, Hirata-san):

• Hirata-san and Sekine-san moved the tank lid and service port ring to the pallet with the crane and covered the open tank with the spare clean bag.
• Hirata-san and Mark got the LBB damper rings assembled and installed. A joint part for the Cu ring needed to have holes enlarged because the hole pattern did not quite match that on the half-ring. The magnet ring is hanging in the chamber and the Cu ring is attached below it with clamps, ready to receive the rods that will hang down from the PI.
• Hirata-san recounted all the unused cables.
• Hirata-san installed the outrigger parts on the LBB, which will receive the rods coming down from the damper ring.
• Enzo and Mark tested all the stepper motors.
• Enzo and Mark debugged the PI horizontal LVDTs. One LVDT had a flaky connection and one card in the LVDT driver had three dead channels. Enzo created a fully working driver using parts from another driver that also had a faulty card.
• Fabian adjusted the ballast mass on the SF to get good pitch/roll/vertical adjustment and attached it with screws.
• Fabian set up the optical lever again (the PR2 team had repossessed the breadboard we had been using but Akutsu-san supplied another one).
• Enzo and Mark tested the pico motors. The software is very unreliable, but we we able to confirm that the IM pitch pico works.
• The whole team wrapped items and shut down equipment ahead of the power outage.

Plan for coming weeks

• Recover from power outage.
• Crane suspension into tank.

Type-Bp (Shoda)

Past week report

• Mirror preparation
  • We glued the wire breakers and flags on the PR2 mirror on last Friday, but they detached when I checked on Sunday.
  • Therefore, we tried the gluing again on Monday, and checked Tuesday evening. But they did not fixed again.
  • We tried again on Thursday, and it is curing time now. This time, we have put more glue on them.
• Other preparation
  • We assembled PR2 BF LVDTs and PRM BF LVDTs. They are all calibrated.
  • We almost finished cabling between the field rack and clean room for PR2.
  • PRM circuits are also almost ready. Not cabled yet.
• PR3 measurement
  • Fujii-kun measured the properties of PR3.
  • We found the one of the coil driver is not working well. The current for PR3/PRM rack and IOO rack was not enough. The problem of the current was fixed with Nakano-kun, but the driver might have been driven with saturated status, which might cause the problem. Actually, the problem was fixed later somehow. We do not know why yet...

  • Miyakawa-san is asking us to report the circuits problem via e-mails when they occur in order to record them.

Plan for coming weeks

• Mirror/RM hanging (if they are properly fixed...)

IMMT (Ohishi)

Past week report

• Removed IMMT2 mirror from IFI chamber
• Hirose-san will carry both IMMT1 and IMMT2 mirrors to Kashiwa.

Plan for coming weeks

• Hirose-san will put first contact on HR surface of mirrors.
• FCL prepare jig parts.

Watchdog system (Tanaka)

Past week report

• Examination of experimental preamplifier circuit fabrication.
  • I'm checking the operation of the fabricated circuit.
• Creation of extended I/O PCB(plot type (With the Main 4ch WDS box and I/O box,I/O board For relay).
  • Request a quote for electronic parts etc(Estimating at Univ.Tokyo.co-op).
  • Other estimates are complete(PCB etc).

Plan for coming weeks

• Examination of experimental preamplifier circuit fabrication. -->Ongoing.

• 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

• Preparation for the power outage by 6/16
• Preparation for the PR floor re-work by 6/16
• 6/19: Power outage
• 6/21: Safety lecture after the morning briefing
• 6/21 11:30 - 12:30: Crane inspection

• 6/20 -24: BS & PR booth: lighting installation (BS and PR2 area 6/23 afternoon)

• 6/22-23: PR area: floor fix
• 6/26-30: PR area: stainless steel flooring
• 6/28: Maintenance of the rapid charger for the electric vehicles

Safety

• Incidents: no
• Foreseen risks
  • Type-A: Open the chamber. Crane works in both ends.
  • Type-B: Heavy crane work.
  • Type-Bp: Mirror hanging.

Discussion

Type-A

• Tasks for 6/19 (Mon) (Takahashi)
  • Make a detailed schedule for X-End
  • Make a list of missing items for X-End and put it on the VIS Type-A wiki

Type-B

• Tentative schedule after the installation into the chamber
  • 6/20 installation into the chamber
  • 6/21-22 Cabling, balancing
  • 6/23 prepare for the TF measurements (using OSEMs)
  • Measure TFs during the weekend

  • 6/26 OpLev installation (Simon)

  • Somewhere in the week of 6/26: gluing of the real BS
  • In the week of July 3: remove the suspension from the chamber
• Make a list of tasks for the preparation of the real BS installation (Mark, to be done on 6/19).
• Assign people to the above tasks (Mark)

Travel Plans

• Travel (Week of 6/19):
  • Takahashi: 20-23
  • Shoda: 20-23
  • Mark: 19-23
  • Fabian: 20-22
  • Okutomi: 20-23
  • Fujii: 20 - 22
  • Ishizaki: 20-23
  • Hirata: 20-23
  • Sato: 20-23
  • Enzo: 20-22
  • Ohishi:
  • Tanaka:
  • Akiyama(Hosei): 20-23
  • Hashimoto(Hosei): 20-22
• Travel (Week of 6/26):
  • Takahashi: 26 - 29
  • Shoda: 26 - 29
  • Mark: 26 - 29 (?)
  • Fabian: 26 - 29 (?)
  • Okutomi: 26 - 29
  • Fujii:
  • Ishizaki: 26 - 29
  • Hirata: 26 - 29 (?)
  • Sato: 26 - 29
  • Enzo: 27 - 29 (?)
  • Ohishi:
  • Tanaka:
  • Akiyama(Hosei): 27 - 29
  • Hashimoto(Hosei): 26 - 29

Next meeting

On 2017/6/23(Fri) Next F2F: 6/30(Fri)