Gabriele, Louis

We've successfully run a full set of calibration swept-sine measurements in the new DARM offloading (LHO:76315). In December, I tried running simulines in the new DARM state without success. I reduced all injection amplitudes by 50% but kept knocking the IFO out of lock (LHO:74883). After those repeated failures, I realized that the right thing to do was to scale the swept-sine amplitudes by the changes that we made to the filters in the actuation path. I prepared four sets of simulines injections last year that we finally got to try this evening. The simulines configurations that I prepared live at /ligo/groups/cal/src/simulines/simulines/newDARM_20231221. In that directory are 1.) simulines injections scaled by the exact changes we made to the locking filters, 2.-4.) reductions by 10,100, and 1000 of the rescaled injections that I made out of an abundance of caution.

The measurements we took this evening are: 

2024-03-15 01:44:02,574 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20240315T012231Z.hdf5
2024-03-15 01:44:02,582 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20240315T012231Z.hdf5
2024-03-15 01:44:02,591 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20240315T012231Z.hdf5
2024-03-15 01:44:02,599 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20240315T012231Z.hdf5
2024-03-15 01:44:02,605 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20240315T012231Z.hdf5


We did not get to take a broadband PCALY2DARM measurement as we usually do as part of the normal measurement suite. Next steps are to update the pyDARM parameter file to reflect the current state of the IFO, process these new measurements, then use them to update the GDS pipeline and confirm that is working well. More on that progress in a comment.


Relevant Logs:
- success in transitioning to the new DARM offloading scheme in March 2024: LHO:76315
- unable to transition into the new offloading in January 2024, (we still don't have a good explanation for this): LHO:75308
- cal-cs updated for the new darm state: LHO:76392
- weird noise in cal-cs last time we tried updating the front end calibration for this state (still no explanation): LHO:75432
- previous problems calibrating this state in December: LHO:74977
- simulines lockloss in new darm state in December: LHO:74887