KAGRA Logbook

Reports 1-1 of 1

OBS (Summary)

satoru.ikeda - 16:07 Friday 26 May 2023 (25391)

Operation Shift Summary

Operators name: Aso, Ikeda

Shift Time: 08-16

Summary：

Check Items:
=> No Probrem
8:00 observation state
11:07 lock-loss
=> PR3_alignment_check.py was used and "Please align PR3" was displayed.
11:12-11:52 PR3 alignment(ikeda)
=> (12:06 K-Log#25387: GRX trans power suddenly droped)
12:52 observation
14:04 Lock-loss
14:11 recovery observation (automatically)
16:00 observation state
What I noticed
K1:PEM-TEMPERATURE_FEILD_PSL2
=> May 25 08:02 UTC: Dead battery

Comments to this report:

tomotada.akutsu - 16:14 Friday 26 May 2023 (25392)

> K1:PEM-TEMPERATURE_FEILD_PSL2 => May 25 08:02 UTC: Dead battery

Hopefully we can repair it in the next regular maintanance day.

> (12:06 K-Log#25387: GRX trans power suddenly droped)

I can say, this kind of strange beam profile of GRX (the right bottom of Fig. 2 of 25387) would be seen, more or less frequenctly in this process recently. Better to understand what is behind and how to fix it, but not now maybe.