Kar Meng, Sheila

About 45 minutes after locking, we turned on the AS42 WFS to track the squeezer alignment while we stepped the ZM5 PSAMs from it's nominal value of -0.4 to -4.5V on the strain guage.  ZM4 is left at it's nominal value of 6.2V.  We doubled the ASC gain to 1 to speed this up, and stepped the psams by 0.5 V at a time waiting for the ASC to catch up a bit between steps. 

After the 42 MHz WFS signals were close to zero at our target psams value, we turned them off and ran SCAN_ALINGMENT, results are here: https://lhocds.ligo-wa.caltech.edu/exports/SQZ/GRD/ZM_SCAN/251117100527/, after that we ran scan sqz angle, results here: https://lhocds.ligo-wa.caltech.edu/exports/SQZ/GRD/SQZANG_SCAN/SQZANG_SCAN_251117101454.png

Then we started a script to move the squeezing angle.  I forgot to turn off the SQZ angle adjust servo for the first 15 minutes of the script, so this data isn't very useful since the ADF servo was running.  Now I've added a reminder to the script if it sees that is on. 

The squeezing angle that scan alignment found to be best was 167 degrees (CLF RF6, servo sign negative), it was at 159.7 from 1447439668 to 1447439844 (2 minutes 27 seconds).  

Went to 167 degrees at 1447442247, then no sqz at 1447442524.  

NLG measurement: amplified max: 0.0198 (drifted down to 0.186) minimum: 0.0007, unamplified 4.9e-5

To restore squeezing we had to trend the osems (once the ASC was cleared and the psams were back to nominal settings), to avoid this in the future we should offload the ASC before we start a psams move. 

Here is the log of times of demod 6 changes from the script:

167.1 : 1447438644.0 
177.1 : 1447438884.0 
172.1 : 1447439124.0 
162.1 : 1447439364.0 
157.1 : 1447439604.0 
200.0 : 1447439844.0 
177.8 : 1447440084.0 
155.6 : 1447440324.0 
133.3 : 1447440564.0 
111.1 : 1447440804.0 
88.9 : 1447441045.0 
66.7 : 1447441285.0 
44.4 : 1447441525.0 
22.2 : 1447441765.0 
0.0 : 1447442005.0