laura.nuttall@LIGO.ORG - posted 14:43, Thursday 30 January 2014 - last comment - 18:58, Thursday 30 January 2014(9671)
IMC ODC summary bit red for the last 21 hrs
I've attached a plot showing that the IMC has 'not been in a good state' (i.e. red) for the last 21 hours due to the ASC control switch not being on (summary bit 1). I can't see anything obvious in the alogs to determine why this is, anyone know? Thanks
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The IMC WFS was off for approximately 8 hrs from Jan-30 01:50 to Jan-30 10:03 in UTC and it have been up in the rest of the time in the past two days. Probably it is because of the master gain which was lowered to 0.25 for some reason yesterday.
I suspect that this was caused by the NPRO relaxation oscillation, see alog 9674. Laura, can you produce the same plot for the PSL ODC channel for the same time segment, as well as check weather this is fixed now? (You will have to exclude the afternoon, as people have actively been working on the mode cleaner.)
I've had a look at the last four hours and the IMC ODC is still red for the same reason (see first attached plot), but the PSL is looking green (2nd plot). I'm currently trying to make the PSL ODC plot for the last day but it's taking some time, so as soon as I have them I'll post it. But if this is to do with the NPRO relaxation oscillation (alog 9674) which Stefan reported turned the PSL ODC green it has not affected the IMC ODC.
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