DURATION: 2020/04/15  1:00-9:00 JST, all times posted in JST

 

operator shift : Ushiba

co-operator shift : H.Yuzurihara with T.Yokozawa, T.Yamamoto

 

CURRENT ENVIRONMENT: very unstable due to unknown reason

 

shift SUMMARY : BNS range 0.5 Mpc ~ 0.6 Mpc

 

time / event

1:00 / shift started. detector was unlocked

 

1:55 / obs. mode (1min)

1:56 / lock loss

        / take alignment again by Ushiba-san

        / yaw of IMMT1 was moved from -9000 to -8500

        / yaw offset of IMMX was moved from -7.3 to -6.9

 

2:43 / end of alignment

 

2:59 / obs. mode (1min)

3:00 / lock loss

 

3:22 / obs. mode (2min)

3:24 / accepted the value of K1:LSC-CARM_SERVO_IN2_GAIN from 20 to 19

        / accepted TRAMP of ADS from 0.5 to 3

3:26 / lock loss

 

3:36 / obs. mode (16min)

3:42 / lock loss

 

3:51 / obs. mode (7min)

3:58 / lock loss

 

4:09 / obs. mode (36min)

4:45 / lock loss

 

4:56 / obs. mode (25min)

5:21 / lock loss

 

5:45 / obs. mode (5min)

5:50 / lock loss

 

6:07 / obs. mode (3min)

6:10 / lock loss

 

6:35 / obs. mode (40min)

7:15 / lock loss

 

8:15 / obs. mode (18min)

8:33 / lock loss