I reran the A2L script today during our small on the hop commissioning window.
The new gains have been entered in the guardian via the a2l_gains dictionary in userapps/isc/h1/guardian/lscparams.py
'FINAL':{
'P2L':{'ITMX':-0.9646, #+1.0,
'ITMY':-0.4071, #+1.0,
'ETMX':3.2767,
'ETMY':4.8886}, #+1.0},
'Y2L':{'ITMX':2.7253, #+1.0,
'ITMY':-2.0093, #+1.0,
'ETMX':4.7658,
'ETMY':0.9094 },#+1.0},# Centered on the optic #removed offsets from EY IX IY 220705 gm jd ec
}#spots that are the center of the optic
}#close a2l gains dict
and accepted in SDF in OBSERVE.snap, see attached images.
Jennie W, Sheila
The gains that changed the most were ITMX P2L (19%) and ITMY Y2L (17%).
Looking at the power spectrum before and after the A2L gain change and the SRCL feedforard update, DARM is the same above 14 Hz and below 8 Hz but shows slight improvement between these frequencies.
The bottom two rows of plots show coherences between DARM and angular degrees of freedom (middle row), and DARM and suspension pitch motion (bottom room). With old FF and A2L on the left, new on the right.
The only ASC DOF (two middle plots) that seems to have got worse is CHARD pitch, DHARD yaw is hard to tell as it sees the calibration lines between 10 and 20 Hz. Also the SRCL coupling to DARM got better confirming the new FF is working.
The limiting degree of freedom seems to be CHARD pitch now. Looking at the bottom plots, ETMY and ETM X pitch coherence with DARM have got worse.
