Differences between revisions 3 and 4

Agenda/Minutes of the VIS Meeting on 2018/9/14

2018/9/14 13:30 -

Participants:

Progress report

Type-A : (PDF/MPP)

Type-B: (PDF/MPP)

[X-front]

The keystone of BF had gone to the lower limit. The FR did not work. Though we can listen to the sound of stepping motor, it is unknown whether the motor is rotating.
The keystone of F3 had gone to the lower limit too. Adjusted the height of keystone by the FR.

[Y-front]

Recovered the analog electronics from the power outage.
Corrected the tilt of ACCs. Moved the NIM chassis for ACC drivers to the side of the rack.

[X-end]

Opened 4 feedthrough flanges. Disconnected the in-vacuum connectors from the feedthroughs.
Undid the cables from the PI.
Inserted the wire holder to the suspension wires.
Dismounted the geophone pods.

[X-front]

[X-end]

JGW-S1807740
- INA103(Secondary coil input stage for Ch1) was exchanged.
- And I received a report that there is an imbalance as a symptom and confirmed the phase shift circuit.-->But no problem.Moved to Kamioka at 09/13/2018 Inspection is completed(And INA103 changed(for ch1).
  - JGW-E1808991(PDF)

On 2018/9/21(Fri)

KAGRA/Subgroups/VIS/VISMinutes20180914 (last edited 2018-09-15 03:29:15 by MarkBarton)

-  ⇤ ← Revision 3 as of 2018-09-13 23:04:29 → 
  Size: 2393
  Editor: RyutaroTakahashi
  Comment:
+   ← Revision 4 as of 2018-09-14 08:58:36 → ⇥
  Size: 2854
  Editor: NobuyukiTanaka
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 53:
+ *JGW-S1807740
   *INA103(Secondary coil input stage for Ch1) was exchanged.
  And I received a report that there is an imbalance as a symptom and confirmed the phase shift circuit.-->But no problem.Moved to Kamioka at 09/13/2018 Inspection is completed(And INA103 changed(for ch1).
   *[[https://gwdoc.icrr.u-tokyo.ac.jp/DocDB/0089/E1808991/001/Report%20on%20failure%20diagnosis%20and%20repair%20of%20LVDT%20driver%20180913.pdf | JGW-E1808991(PDF)]]