georgia.mansell@LIGO.ORG - posted 12:34, Tuesday 05 July 2022 - last comment - 14:41, Tuesday 05 July 2022(63812)
IMC-PWR_IN and IM4_TRANS power calibrated
Craig, Georgia Today Georgia and I adjusted the input power calibrations according to recent measurements taken in-chamber. This will affect comparisons of requested input power to the past, so we will report the differences here.PSL power input cal = 7.2% lower PRM input power cal = 11.2% higherNow the PSL input reads 1.9 W and the PRM input power reads 1.8 W when 2 W is requested. The PSL input power calibration is based on our integrating sphere measurement in HAM1 at location A in alog 63519. The PRM input power calibration is based on Keita's HAM6 measurement in alog 62213, with out 1.6% responsivity correction in the comments applied. The actual filter modules adjusted where FM10 "toWatts" forIMC-PWR_IN_DCandIMC-PWR_INfor the PSL input, and FM10 "InpCal_W" forIMC-IM4_TRANS_NSUM.Calibrations Current PSL: 0.00561387 W/cts IM4: 4.624 W/cts Old PSL: 0.00605 W/cts IM4: 4.157 W/cts
We have updated the calibration of the PR gain to match the new IM4_TRANS calibration.
We went into the H1:LSC-PR_GAIN filter bank increased the gains in the POPAIRcal and POPcalib filters by 11.75%.
The POP calib was a factor of 2 too low, since the power on POP changed in the HAM1 vent. So we multiplied the calibration by 2.
0.19050.381We haven't touched the calibration of the the rotation stage.