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Agenda/Minutes of the VIS Meeting on 2018/3/30

2018/3/30 13:30 -

Participants:

Progress report

Schedule Chart

Type-A : (PDF/MPP)

Type-B: (PDF/MPP)

Type-A (Takahashi)

Past week report

[X-end]

  • Adjusted the weight of cryo-payload (CP).
  • Adjusted the height of F1, F2, and F3 using the FRs. The height of BF was set to 80mm.
  • Set the height of F0 keystone to 5.5mm adjusting the weight on the keystone.
  • Aligned the CP using the yaw adjustment screw in F0.
  • Adjusted the position of secondary coils for the BF damper.
  • Released the IP. Adjusted the horizontal FRs. Applied the DC control.
  • Closed the top chamber.

[X-front]

  • Cabled the LVDT-Actuator and the FR in the F1.
  • Mounted the F1 onto the EQ stop with the maraging wire.
  • Cabled between the F2 and the F1.
  • Calibrated the LVDT of F1.
  • The height of keystone was too low without additional weight on the F2.
  • Compressed four blades.
  • Replaced the blade of FR from the F2 type to the F1 type.
  • Measured the transfer functions. The frequency of F1 was 0.3Hz.
  • Found that the F3 is not working.
  • Disassembled the F1 stage to lift up the F3.

Plan for coming weeks

[X-front]

  • Recover the F3.
  • Go buck to the F1 stage.
  • Prepare for the pre-isolator.

Type B (Mark)

Past week report

Report for week of 3/26

BFs:

  • BF No. 1:
    • Fujii-san finished tuning. Optimal load: 52.15[kg]. Resonance frequency: 0.37[Hz]. Optimal height: 64.7[mm].
    • We wired the LVDT, Picomotor and Steppermotor.
    • We measured the keystone tilt at different points and the differences are within 0.1[mm]
    • We added cable clamps to the base.
  • BF No.7:
    • Tanioka-san and Fujii-san replaced the blades corresponding to the BS for the SR type blades.
    • The yoke position was corrected.
    • The fishing rod was assembled.
    • Compression tuning is ongoing.??

SFs:

  • Hirata-san and Tanioka-san set up the frame to check the SFs.
  • SF (B2-5):
    • Hirata-san, Fujii-san and Tanioka-san checked the optimal load with and without cap. The optimal load changes about 250[g]. The cap didn't come out smoothly.
    • We measured the keystone tilt at different points, and the differences are within 0.1[mm] (65.5, 65.5, 65.5, 65.4)
  • SF (B2-6):
    • Hirata-san, Fujii-san and Tanioka-san checked the optimal load with and without cap (On going?).
    • We measured the keystone tilt at different points, and the differences are within 0.3[mm] (63.7, 63.5,63.8, 63.8)

SR3/SRM:

  • Kozu-kun and Enzo finished the SR3 in-air cabling.
  • Enzo prepared the SR3 and SRM rack in parallel (On going).
  • The drawing of the ballast masses are almost done. Shoda will ask for quotation soon.

SR2:

  • Hirata-san tested the safety bars in the SR2 area.
  • We got new power supply for the SR2 Rack. Before, the power was coming from the BS rack.

BS:

  • After re-starting the computer, the issue reported last week was fixed.
  • Kozu-kun and Enzo helped Enomoto-san troubleshooting the BS Oplev issue (On going).

Shipping:

  • We received the LBB parts for SR2.
  • We received the Payload parts (IM and IRM) this morning.

Control Issue:

  • BS
    • The whitening filter of only IMH high power coil driver is on somehow, without anti-whitening filter. It should be fixed at some point, maybe after Phase-I.
  • SR2
    • BIO issue was fixed and TFs of IM, BF, and SF are measured.

Plan for coming weeks

Plan for week of 4/2

  • Mark at Mitaka Mon, Kamioka from Tue.
  • Shoda-san at Mitaka
  • Others at Kamioka
  • --
  • Finish BFs tasks (cabling +calibration)
  • Finish SFs tasks (cabling +calibration)
  • Add cable clamps to bases.
  • Add cable clamps and Cu segments to caps (only if they fit well).
  • Build 2xIM, 2xIRM
  • Glue SR3 mirror?

Plan for week of 4/9

  • Shoda-san at Mitaka
  • Fujii-san at Mitaka
  • Tanioka-san at Mitaka?
  • Others at Kamioka
  • --
  • OSEM calibration
  • Finish IMs and IRMs
  • Build 1xRM
  • Glue SR3 mirror?

Plan for week of 4/16

  • Shoda-san at Mitaka
  • Fujii-san at Mitaka
  • Tanioka-san at Mitaka?
  • Others at Kamioka
  • --
  • Start SR3 Hang?

Plan for week of 4/23

  • Shoda-san at Mitaka
  • Others at Kamioka
  • --
  • F0 blade prototype test

Plan for week of 4/30

  • Golden Week!

Type-Bp (Shoda)

Past week report

Plan for coming weeks

OMMT & OSTM (Ohishi)

Past week report

Plan for coming weeks

Watchdog system (Tanaka)

Past week report

  • Business trip plan
    • March 25(Toyama),26th-29th(Kamioka),30th(Preliminary day Toyama->Tokyo)

  • Installation place-->PRM,PR3,PR2,BS,SR2(However,only to install. Launch is done on another occasion.)

    • —>Completed

  • Prepare necessary documents —>

    • JGW-S1808015,S1808016,S1808017,S1808021,S1808022,S1808010,S1808011,S1808012

Plan for coming weeks

  • Next install plan
    • I plan to install SR3 and SRM after completion of installation.
    • Actual launch is scheduled for May or later.

Other site works

Safety

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

Discussion

Phase 1 Operation

  • Stay in ICRR lodging
  • Energency contact list

Misc

  • PR2-PR3 duct
  • Publications/Presentations related to KAGRA in FY2017
  • Bus time table change

Travel Plans

  • Travel (Week of 4/2):
    • Takahashi:
    • Okutomi:
    • Sato:
    • Ishizaki:
    • Mark:
    • Hirata:
    • Enzo:
    • Shoda:
    • Ohishi:
    • Fujii:
    • Tanioka:
    • Tanaka:
    • Kozu (ICRR):
    • Arai (ICRR):
  • Travel (Week of 4/9):
    • Takahashi:
    • Okutomi:
    • Sato:
    • Ishizaki:
    • Mark:
    • Hirata:
    • Enzo:
    • Shoda:
    • Ohishi:
    • Fujii:
    • Tanioka:
    • Tanaka:
    • Kozu (ICRR):
    • Arai (ICRR):

Next meeting

On 2018/4/6(Fri)

KAGRA/Subgroups/VIS/VISMinutes20180330 (last edited 2018-03-30 15:41:55 by YoichiAso)