cheryl.vorvick@LIGO.ORG - posted 14:49, Monday 18 April 2016 - last comment - 15:37, Monday 18 April 2016(26634)
IM1-4 have shifted alignment since the start of the PSL work
First plot shows the last IMC locks before the PSL work started, and the alignment of the IMs.
Second plot shows the our first IMC lock since PSL work started, and the change in the IMs alignment (IM2 pitch, the worst offender).
TJ kindly agreed to restore the pre-PSL work alignment of the IMs, and since we don't have light, we'll need to check IM4 Trans QPD with the next IMC lock.
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I managed to get them back to their previous values, but there were a few that I seem to drift on their own. IM3 P was the worst culprit, and I'm guessing this is normal since its slider value is 57700.
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