craig.cahillane@LIGO.ORG - posted 18:48, Wednesday 19 December 2018 - last comment - 07:45, Thursday 20 December 2018(46082)
Scripts to run PRCL and SRCL lines using the LSC OSC matrix
If you want to monitor the PRCL and SRCL optical gain, you may runorpython /ligo/home/craig.cahillane/Git/IFO/LSC/scripts/PRCL_132HzLine_and_OscillatorMon.pypython /ligo/home/craig.cahillane/Git/IFO/LSC/scripts/PRCL_152HzLine_and_OscillatorMon.pypython /ligo/home/craig.cahillane/Git/IFO/LSC/scripts/SRCL_138HzLine_and_OscillatorMon.pyto start lines in the LSC oscillator matrices 1 and 2 respectively. The lines are demodulated at the correct phases for 20 watts, and the script sets the filter modules with 10 Hz bandpasses about the exc frequency, and a 0.1 lowpass on the I and Q signals. An example PRCL optical gain monitor is shown below. The POP 9 I signal is sent to H1:LSC-LOCKIN_1_DEMOD_1_SIG, demodulated by the excitation, and the results lowpassed and reported in H1:LSC-LOCKIN_1_DEMOD_1_{I,Q}_OUTPUT. EDIT: I made a MICH equivalent script in the same directory, and a bash script which launches all the OSCs:bash /opt/rtcds/userapps/release/lsc/h1/scripts/set_up_LSC_dither_lines.shand a code which shuts down the dither lines:bash /opt/rtcds/userapps/release/lsc/h1/scripts/take_down_LSC_dither_lines.sh
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Several times during the power ups tonight, we ran 4 lines in yaw to measure the changes in the ASC yaw sensing matrix:
PRC1 H1:ASC-ADS_YAW1_OSC_FREQ 16.131
PRC2 H1:ASC-ADS_YAW2_OSC_FREQ 18.37
CHARD H1:ASC-ADS_YAW8_OSC_FREQ 23.25
CSOFT H1:ASC-ADS_YAW9_OSC_FREQ 21.111
analysis in progress...
According to our last lock this evening our POP9I/PRCL optical gain fell by a factor of 5 during the entire thermalization. Dan was playing around with ring heaters, which caused the drop at end, but overall this is pretty dire. POP45I/SRCL fell by ~15% in the same time. POP45Q/MICH did not move much, with only about a 5% drop.
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