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haocun.yu@LIGO.ORG - posted 11:50, Tuesday 21 June 2016 - last comment - 17:25, Tuesday 21 June 2016(27885)
HARD Loops after OL servos on for ETM's

Jenne, Nergis, Rana, Haocun

 

After all the PIT optical lever servos were on for both the ITMs and ETMs (27863), we measured the HARD Loops Gains again yesterday evening.

In the pictures attached, the red dots are mesurements when the PIT OLDAMPs are on for all the TMs, and also we have boosts on for those measurements (which explains the magnitude changes in low frequency and phase changes even for Yaw). The black curves are the measurements taken before the OL servos were on for the ETMs, and without boosts. The blue curves are the modeling results, which assume only OL on for ITMs.

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haocun.yu@LIGO.ORG - 17:25, Tuesday 21 June 2016 (27897)

.fig files attached.

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