KAGRA Logbook

Reports 1-1 of 1

OBS (General)

keiko.kokeyama - 17:45 Thursday 09 April 2020 (14066)

morning shift on Apr 9

[Kokeyama, Hayakawa]

Lock was lost several times this morning:

lock loss at 9:33

locked 10:06
lock loss 11:09

locked 11:21
lockloss 15:24
(This segment was not recoded as observation. DQ status was not on due to SDF changes. I don't know which values were changed. Sorry for the miss.)

locked 15:35
lock loss 15:20

locked 16:46
lock loss 16:51

locked 17:14, Lucia took over

Comments to this report:

keiko.kokeyama - 18:31 Thursday 09 April 2020 (14067)

All the locklosses in this morning shift were due to the alignment degradation happned commonly in the X and Y arms - See, the first attachment.

Looking at the oplev trends (attached), VERTEX (BS, PR3, ITMX_YAW, ITMY_YAW) seem drifting more than the ETMs.

Images attached to this comment