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Reports until 12:15, Saturday 14 January 2017
LHO General
patrick.thomas@LIGO.ORG - posted 12:15, Saturday 14 January 2017 - last comment - 13:30, Saturday 14 January 2017(33268)
Ops Day Mid Shift Summary 
Lost lock in POWER_UP, same as Ed reported. Something seems wrong with the ISS (see previous alog). I have stopped at DC_READOUT while I investigate, but I'm not making much progress. I have left a message with Keita and Peter.
Comments related to this report
patrick.thomas@LIGO.ORG - 12:17, Saturday 14 January 2017 (33269)
Link 

It seems similar to alog 30335.
andrew.lundgren@LIGO.ORG - 12:26, Saturday 14 January 2017 (33270)DetChar, PSL
Link 

Could it be a problem with the ISS AOM power supply? The summary page shows that the voltage has dropped (plot).
patrick.thomas@LIGO.ORG - 12:47, Saturday 14 January 2017 (33271)
Link 

I'm not certain, but my guess is that that signal is actuated on to set the diffracted power.
patrick.thomas@LIGO.ORG - 12:54, Saturday 14 January 2017 (33272)
Link 

I think it might be a control loop somewhere, because locking and unlocking it can sometimes make the noise go away.
patrick.thomas@LIGO.ORG - 13:00, Saturday 14 January 2017 (33273)
Link 

I watched the diffracted power signal and it got noisy as soon as it got to the DIFF portion of FIND_IR.
patrick.thomas@LIGO.ORG - 13:30, Saturday 14 January 2017 (33274)
Link 

Peter is on his way to the site.
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