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At the end of last Friday shift, in agreement with control room (Menzione), I applied some kicks to the payloads, in the standard manner.
- Only in case of WE (as well known) the switch of the motor drivers unlocked the ITF.
- In all the other cases the kick is at the origin of the unlock, then the ITF relock was driven to LN3 by the automation.
- In the Channel SDB2_PD*_Audio_100k (raw) data at 100kHz can be used to check harmonics of bulk modes, Paola, Rob an others can use it.
In prep for the upcoming violin mode damping fun, I've used the times given above to identify the mirrors belonging to first order modes. I attach a text file with frequencies (question marks indicate peaks I'm uncertain about) and a snapshot of the spectrum at the times above where purple == no excitation, orange == WI, blue == NE, green == WE. NI modes identified in 41712.
I've had a second look, including at the NI kick time (~June 5 20:00 UTC) and I attach an updated, more sure violin mode list. The only changes were to input modes. Yuta has updated the line tracker code accordingly.