ibrahim.abouelfettouh@LIGO.ORG - posted 19:14, Wednesday 19 February 2025 - last comment - 20:19, Wednesday 19 February 2025(82920)
PRCL Open Loop Gain Measurements
TJ, Ibrahim, Sheila, Elenna
Measured PRCL OLG at 2 different times during NLN - both attached.
First (done by TJ) at 3hrs into NLN - Screenshot 1.
Second at 15 minutes into seperate NLN. This one was done after a PRCL-related lockloss (alog 82916) at which point Elenna changed the PRCL2 Gain from 1 to 1.2 (alog 82917) - Screenshot 2.
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Just a note that we are trying for a UGF of about 30 Hz here. Right after lock, this is clearly a bit too high, but hopefully with the 20% gain boost after thermalization it will settle closer to 30 Hz.