Calibration shift lasted from 13h to ~15h20 LT, with some unlocksĀ in-between.
We first did injections to measure the input to end mirror actuation ratio in dark fringe with the controls sent to the end mirrors in LN1 mode, and the input mirrors set in HP mode (relay not opened for this measurement): from 13h15 to 13h45 LT.
Then we tried to inject colored noise to measure the TF and sensivity, but the injected noise was not the good one (white noise instead of colored), and the ITF unlocked at 13h58m LT. The succession of commands from injection script to CALnoise must be checked carefully to fix the issue. We have added SMS channels to the {MIR}_colornoise so that we can check which filter is loaded in the script before starting the filter computation.
We did free Michelson measurements from 14h13 to 14h40 LT. At the beginning, the B1p_PD1 photodiode was unexpectedly closed (the automation sends a command to open it, but does not check its effect yet ; this check must be added for more robustness). We opened it manually and restarted the measurement procedure from CALI: from 14h24 to 14h40 LT. Note that DeltaL reconstructed online was using B1p_PD1_DC and B1p_PD1_6MHz ; we saw a few saturation on the B1p_PD1_Audio channel, but not much, hence it must be useful to recompute DeltaL offline with the Blended channel.
The ITF has then been relocked in dark fringe LN1, we put back NI in HP mode and did some colored noise injections on NI playing with CALnoise directly. We had some coherence from the noise to DARM in the range 10 Hz 100 Hz, but then unlocked at 15h24 LT.