DURATION: 2020/04/16  09:00-17:00 JST, all times posted in JST

 

Operator Shift: T. Yokozawa -> M. Nakano

Co-operator Shift: T. Tomura

 

CURRENT ENVIRONMENT: Quiet

 

SHIFT SUMMARY: BNS range 0.5 Mpc ~ 0.6 Mpc

 

time / event

09:00 / Shift started.  Interferometer status was LOCKED. (IMC Output Power: 2.8W)

09:01 / Interferometer status switched to OBSERVING.

 

09:30 / Interferometer status switched to LOCKED.  Nakano-san started working on A2L decoupling.

 

10:00 / LSC_LOCK:ok, VIS:ok, Data Transfer:No update for Virgo

 

10:13 / Nakano-san's work finished.  Interferometer status switched to OBSERVING.

 

11:20 / Lock loss. (Due to eathquake?)  Nakano-san started to increase the laser power.

 

11:39 / PRFPMI locked. (IMC Output Power: 7.0W)

11:41 / Interferometer status switched to OBSERVING.

 

11:46 / Nakano-san raised CARM servo gain by +10dB.  (IFO status switched to LOCKED at that moment.)

 

11:52 / Nakano-san fixed Y-arm GR.  (IFO status switched to LOCKED for ~1min.)

 

12:00 / LSC_LOCK:ok, VIS:ok, Data Transfer:No update for Virgo

 

12:01 / Lock loss.

 

12:38 / PRFPMI locked. (IMC Output Power: 2.4W)

12:52 / Lock loss.

  Nakano-san turned on dewhitening for PR2/3/M.

 

13:13 / PRFPMI locked. (IMC Output Power: 4.2W)

13:17 / Interferometer status switched to OBSERVING.

 

14:00 / LSC_LOCK:ok, VIS:ok, Data Transfer:No update for Virgo

 

15:02 / Lock loss.

  Nakano-san turned off de-whitening for PRM.

 

15:15 / Locked, but lock loss soon after.

 

15:25 / PRFPMI Locked. (IMC Output Power: 4.2W)

15:26 / Interferometer status switched to OBSERVING.

 

15:52 / Lock loss.

 

16:00 / LSC_LOCK: PRFPMI_LSC_LOCKED_RF, VIS:LOCK_ACQUISITION, Data Transfer:No update for Virgo

 

16:04 / PRFPMI Locked. (IMC Output Power: 4.1W)

16:10 / Interferometer status switched to OBSERVING.

 

17:00 / Shift finished.  OBSERVING state continues.

 

Duty cycle 2020/04/16 09:00 -- 17:00: Observation mode 61.7%