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

2018/3/30 13:30 - 14:50

Participants: Okutomi, Enzo, Takahashi, Shoda, Aso, Sato, Fujii, Fujii, Tanaka, Ishizaki, Tanioka, Hirata

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!

==== Discussions =====

• 52.15kg optimal load for BF No.1 may be too low. We need to change the ballast masses for the IM.
• Aso will check the delivery date of SR3 with Hirose-san.

• Length sensing OpLev of BS is strange. We need a calibration.

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: no incident
• Foreseen risks
  • Type-A: Crane work
  • Type-B: Crane work, working with springs.
  • Type-Bp:

Discussion

Phase 1 Operation

• Stay in ICRR lodging
  • Okutomi: Locomotion 4/23 - 5/1
  • Tanioka: Yuuki House 4/23 - 5/1
  • Kozu ?
• Emergency contact list
  • Type-A: Okutomi, Takahashi
  • Type-B: Mark, Fujii
  • Type-Bp: Shoda, Miyo(?)

Misc

• Can the PR2-PR3 duct be permanently installed ?
  • For working with PR2 and PR3, it is OK to have the duct installed.
• Publications/Presentations related to KAGRA in FY2017
  • Please send the list to Aso by April 6th.
• Bus time table change
  • Seek for a possibility to renting parking spots for the lease cars.

Travel Plans

• Travel (Week of 4/2):
  • Takahashi: 3-6
  • Okutomi: 3-6
  • Sato: 3-6
  • Ishizaki: 3-6
  • Mark: 3-6
  • Hirata: 3-6
  • Enzo: 3-5
  • Shoda:
  • Ohishi:
  • Fujii: 3-6
  • Tanioka: 3-6
  • Tanaka:
  • Kozu (ICRR): 3-6
  • Arai (ICRR):
• Travel (Week of 4/9):
  • Takahashi: 10 - 13
  • Okutomi: 9 - 13
  • Sato: 9 - 13
  • Ishizaki: 9 - 13
  • Mark: 9 - 13
  • Hirata: 9 - 13
  • Enzo: 9 - 12
  • Shoda:
  • Ohishi:
  • Fujii:
  • Tanioka: 9 - 13
  • Tanaka:
  • Kozu (ICRR): 9 - 13
  • Arai (ICRR):

Next meeting

On 2018/4/6(Fri)