Jennie W, Craig C.

We paused the IFO at state 503 (CHECK_VIOLINS_BEFORE_POWERUP) and took another test where we looked at the power on POPAIR B RF18 and 90 while changing first the 9 and the 45 MHz modulation depths.

The times series of the two PDs readouts we care about and the guardian is the first image. the second image shows all the PDs in one document.

Results are:

Sideband and carrier powers at each diode

H1:IMC-PWR_IN_OUT16 9 power = 0.051 W
H1:IMC-PWR_IN_OUT16 45 power = 0.117 W
H1:IMC-PWR_IN_OUT16 carrier power = 1.834 W
H1:IMC-PWR_IN_OUT16 total DC power = 2.003 W
H1:IMC-IM4_TRANS_NSUM_OUT16 9 power = 0.047 W
H1:IMC-IM4_TRANS_NSUM_OUT16 45 power = 0.105 W
H1:IMC-IM4_TRANS_NSUM_OUT16 carrier power = 1.668 W
H1:IMC-IM4_TRANS_NSUM_OUT16 total DC power = 1.819 W
H1:LSC-REFL_A_LF_OUT16 9 power = 0.014 mW
H1:LSC-REFL_A_LF_OUT16 45 power = 0.028 mW
H1:LSC-REFL_A_LF_OUT16 carrier power = 0.210 mW
H1:LSC-REFL_A_LF_OUT16 total DC power = 0.252 mW
H1:LSC-REFL_B_LF_OUT16 9 power = 0.013 mW
H1:LSC-REFL_B_LF_OUT16 45 power = 0.026 mW
H1:LSC-REFL_B_LF_OUT16 carrier power = 0.193 mW
H1:LSC-REFL_B_LF_OUT16 total DC power = 0.231 mW
H1:LSC-POP_A_LF_OUT16 9 power = 34.865 uW
H1:LSC-POP_A_LF_OUT16 45 power = 28.588 uW
H1:LSC-POP_A_LF_OUT16 carrier power = 1027.882 uW
H1:LSC-POP_A_LF_OUT16 total DC power = 1091.334 uW
H1:ASC-POP_A_NSUM_OUT16 9 power = 8.372 cts
H1:ASC-POP_A_NSUM_OUT16 45 power = 6.709 cts
H1:ASC-POP_A_NSUM_OUT16 carrier power = 241.335 cts
H1:ASC-POP_A_NSUM_OUT16 total DC power = 256.416 cts
H1:ASC-POP_B_NSUM_OUT16 9 power = 7.685 cts
H1:ASC-POP_B_NSUM_OUT16 45 power = 6.310 cts
H1:ASC-POP_B_NSUM_OUT16 carrier power = 222.705 cts
H1:ASC-POP_B_NSUM_OUT16 total DC power = 236.701 cts
H1:ASC-AS_C_NSUM_OUT16 9 power = 0.019 W
H1:ASC-AS_C_NSUM_OUT16 45 power = 0.051 W
H1:ASC-AS_C_NSUM_OUT16 carrier power = 0.032 W
H1:ASC-AS_C_NSUM_OUT16 total DC power = 0.101 W
H1:ASC-OMC_A_NSUM_OUT16 9 power = 0.020 W
H1:ASC-OMC_A_NSUM_OUT16 45 power = 0.057 W
H1:ASC-OMC_A_NSUM_OUT16 carrier power = 0.032 W
H1:ASC-OMC_A_NSUM_OUT16 total DC power = 0.109 W
H1:ASC-OMC_B_NSUM_OUT16 9 power = 0.018 W
H1:ASC-OMC_B_NSUM_OUT16 45 power = 0.049 W
H1:ASC-OMC_B_NSUM_OUT16 carrier power = 0.031 W
H1:ASC-OMC_B_NSUM_OUT16 total DC power = 0.097 W
H1:ASC-X_TR_A_NSUM_OUT16 9 power = 45.016 W
H1:ASC-X_TR_A_NSUM_OUT16 45 power = 52.783 W
H1:ASC-X_TR_A_NSUM_OUT16 carrier power = 10961.375 W
H1:ASC-X_TR_A_NSUM_OUT16 total DC power = 11059.174 W
H1:ASC-X_TR_B_NSUM_OUT16 9 power = 57.131 W
H1:ASC-X_TR_B_NSUM_OUT16 45 power = 66.290 W
H1:ASC-X_TR_B_NSUM_OUT16 carrier power = 14355.521 W
H1:ASC-X_TR_B_NSUM_OUT16 total DC power = 14478.941 W
H1:ASC-Y_TR_A_NSUM_OUT16 9 power = -258.850 W
H1:ASC-Y_TR_A_NSUM_OUT16 45 power = 380.017 W
H1:ASC-Y_TR_A_NSUM_OUT16 carrier power = 14506.812 W
H1:ASC-Y_TR_A_NSUM_OUT16 total DC power = 14627.979 W
H1:ASC-Y_TR_B_NSUM_OUT16 9 power = -267.817 W
H1:ASC-Y_TR_B_NSUM_OUT16 45 power = 403.885 W
H1:ASC-Y_TR_B_NSUM_OUT16 carrier power = 15432.447 W
H1:ASC-Y_TR_B_NSUM_OUT16 total DC power = 15568.516 W

Power-recycling gains for sidebands and carrier

9 MHz PRG = 70.9
45 MHz PRG = 25.9
Carrier PRG = 58.4

Reflection ratios for sidebands and carrier

9 MHz reflection ratio = 0.176
45 MHz reflection ratio = 0.159
Carrier reflection ratio = 0.075
 

To run test make sure corner POP beam diverter is unshuttered (which it is in this guardian state) then run labutils/mod_depth_up_down_test/code/measure.py, then find the csv file with the correct GPS time in ../data and copy the start and stop times for the mod-depth changes into mod_depth_analysis.py and run this file.
The level on POP90 in the nominal blue region is not in a steady state which means we did not wait long enough at 2W when the measurement finished to get a good estimate of the nominal power on the diode before the IFO started powering up to 10W in the next guardian state.