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Reports until 10:30, Saturday 13 April 2019
H1 General
corey.gray@LIGO.ORG - posted 10:30, Saturday 13 April 2019 - last comment - 19:44, Saturday 13 April 2019(48463)
Update: Lockloss at 16:39utc (9:39amPDT) & ALS Polarizations high for Y (& then X!)

Did not see anything obvious on signals.  And can't make out anything obvious from a glance at the Online Lockloss.

During the last lock, DIAG_MAIN said polarization for ALSy was high (it was hovering around 30 and up to 41), so I went to READY state on ISC_LOCK and did a remote adjustment of the polarization.  It's a bit scary because when restoring, polarization went all the way up to 170%!  But able to bring it down fairly easily (first with stepsize of 5).  One thing I neglected to check was ALSx, because when I was done with ALSy, ALSx was now high!  I was able to bring it down only to 17.  

For locking, had one lockloss around the DRMI_TO_POP step.  2nd attempt had a short DRMI lock of seconds...currently waiting for PRMI.  May try an Initial Alignment if no luck in the next few mintues.

NOTE:  Just locked PRMI.  Used BS mainly to adjust mostly PITCH and a little Yaw.  Moving back on to locking!

Comments related to this report
corey.gray@LIGO.ORG - 10:42, Saturday 13 April 2019 (48464)CDS, OpsInfo, PEM

NOTES:  

1) Online Lockloss Tool & PEM channels?:  Are there any PEM (i.e. seismic) channels that it looks at?  SEISMON noted some EQs (but they didn't show up on the nuc5).

2) NDScope & Trend data:  For the ALSy Polarization, I wanted to get a trend of the last couple of days, but it would only go about 1-day back.  Is this normal?  I went ahead and used Dataviewer to get the trends.

thomas.shaffer@LIGO.ORG - 19:44, Saturday 13 April 2019 (48471)

I don't seem to have a problem using ndscope to trend ALSY polarization. Not sure what was going on...

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