Jennie W, Sheila D

We decided to try Gabriele's angle to legnth decouplig script, which was in regular use before we started to use ADS (44532).  This is needed again because we found that the camera servos were not keeping the A2L couplings small, and because we are changing the camera offsets to be different from the set points found by ADS. 

To get the script working we:

• changed the channel names for A2L to A2L_SPOT because of changes in the drivealign matrix that have been made since we were last regularly using this script.
• The notches for the 30 Hz excitation were previously in the HARD ASC filter banks, they have been overwritten since.  We added 30Hz elliptic band stops in the SUS L3 ISCINF filter banks for all four quads, and added turning these notches off to the "clean exit" function.
• We reduced the amplitude from 300 to 30, after testing the injections using awggui.

The script is at  userapps/isc/h1/scripts

there is a bash script that runs this and sets the A2L gains for all 4 test masses, called run_all_a2l.sh  This calls the my_a2l.py script for each optic for pitch and yaw.

The screenshot here shows that last night the yaw noise coupling to DARM was bad, as expected because Jennie moved the camera servo setpoint to improve build ups 77033.  Running this script now (early in the lock, while waiting for violin modes in OMC_whitening) seems to have fixed the low frequency noise for now.  We probably want to rerun this script with a more thermalized IFO. 

After running this script (several times), we've set the A2L gains for 'FINAL' in lscparams:

'FINAL':{
            'P2L':{'ITMX':-0.9709, #+1.0,
                   'ITMY':-0.3830, #+1.0,
                   'ETMX':4.1183,
                   'ETMY':4.6013}, #+1.0},
            'Y2L':{'ITMX':2.7837, #+1.0,
                   'ITMY':-2.3962, #+1.0,
                   'ETMX':4.9315,
                   'ETMY':3.0610 },#+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 these values in OBSERVE.snap.

The second attached screenshot here shows HARD loop coherence with DARM after running this script, there is still CHARD Y coherence below 20Hz, but this is much better than last night.

We spent a few minutes in NLN_CAL_MEAS with nominal sqz settings starting at 22:44:31- 22:55 UTC  (1396737889)