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Reports until 03:06, Wednesday 04 March 2020
H1 PSL
jim.warner@LIGO.ORG - posted 03:06, Wednesday 04 March 2020 (55427)
FSS making locking difficult tonight

Just got back to observing, but getting locked tonight has been difficult. Each lockloss causes the FSS to start oscillating, I couldn't even get it to calm down when Corey left, so I had to call Keita for some help.

So far the process has been: disable ISS autolocker, toggle FSS autolocker, increase FSS oscillation threshold (I put it at 4), wait for FSS to settle down, re-engage ISS autolocker and cross fingers. If that worked, the oscillation threshold was reverted Usually by that point the arms had locked and we were back on our way, but each lockloss was a repeat of this process. I also think Keita must have paused the FSS guardian, but I can't remember if he told me that he did that.

Hopefully, the winds don't get any worse, I don't want to be doing this all night. Seems okay for now, I haven't had to touch anything else.

Displaying report 1-1 of 1.