I performed the lockloss investigation for the lockloss which happened between 2025/10/07 18:30 JST~10/08 9:0:0 UTC. The previous lockloss investigation was posted in klog35248.
During this period, there were 13 lockloss from the INCREASING_LAS_POWER state. The plots are listed in DAC wiki.
This time, I focus on the classification based on this klog. The template for the ndscope was prepared by Ushiba-san and stoped in /users/yuzu/lockloss/etc/lockloss_LSC-CARM.yml .
Lockloss during increasing the laser power
- "2025-10-08 08:16:14.812500 JST", 1443914192.8125
Lockloss during changing CARM_SERVO_IN1GAIN
Note that in the previous analysis(klog), the gain -22 was magic number.
- "2025-10-07 23:21:31.937500 JST", 1443882109.9375 (gain -23 to -22)
- "2025-10-08 00:11:21.687500 JST", 1443885099.6875 (gain -22 to -21)
Lockloss after finishing the process in INCREASING_LAS_POWER state and after breathing of IMC_SERVO_MIXER_DAQ
- "2025-10-07 20:00:26.312500 JST", 1443870044.3125 (duration=7237 s)
Lockloss after finishing the process in INCREASING_LAS_POWER state and after the glitches of IMC_SERVO_MIXER_DAQ
- "2025-10-07 23:52:11.562500 JST", 1443883949.5625 (duration = 1444s)
- "2025-10-08 02:26:03.687500 JST" 1443893181.6875 (duration = 427 s)
Lockloss after finishing the process in INCREASING_LAS_POWER state, but no special feature
- "2025-10-08 03:01:01.437500 JST", 1443895279.4375 (1573 s) (GRX shows the oscillation of 0.14 Hz)
- "2025-10-08 05:19:08.562500 JST", 1443903566.5625 (7637 s)
- "2025-10-08 08:02:27.187500 JST", 1443913365.1875 (1777 s) (GRX shows the oscillation of 0.14 Hz)
- "2025-10-08 08:54:16.062500 JST", 1443916474.0625 (1529 s) (GRX shows the oscillation of 0.14 Hz)
Earthquake
- "2025-10-07 20:13:17.562500 JST", 1443870815.5625
- "2025-10-08 02:10:33.687500 JST", 1443892251.6875
- "2025-10-08 06:43:07.812500 JST", 1443908605.8125