Reports until 13:59, Tuesday 22 January 2019
H1 ISC
daniel.sigg@LIGO.ORG - posted 13:59, Tuesday 22 January 2019 - last comment - 19:11, Tuesday 22 January 2019(46577)
Updating IM4 & MC2 Trans calibration

Both of these QPDs acquired an NSUM channel. The medm screens reached from the IMC overview have been updated to also include the whitening.

The calibration is now according to alog 46482. The segments are in mW, whereas the new NSUM channels is in W incident to the mirror.

The IMC trigger had to be adjusted to account for the change in the MC2 TRANS SUM.

Comments related to this report
daniel.sigg@LIGO.ORG - 17:29, Tuesday 22 January 2019 (46585)
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We also updated the ASC-AS_C QPD calibration. The previous calibration was 18dB too low, because the whitening gain was changed to 18dB from 36dB. We added the mW calibration into the segments and added a calibration relative to the incident mirror power (power towards HAM6) into the NSUM filter module.

craig.cahillane@LIGO.ORG - 19:11, Tuesday 22 January 2019 (46590)
Link 

Updated IM4 Trans NSUM calibration to be input power W:
IM4 Trans NSUM Out = True Input Power [W] = IM4 Trans NSUM In [mW] * R_IM4/(T_IM4 * 0.1) * 1e-3 = IM4 Trans NSUM In [mW] * 4.157 [W/mW]
T_IM4 (aka T_SM2) is 2400 ppm.