jenne.driggers@LIGO.ORG - posted 01:55, Thursday 03 November 2016 - last comment - 14:48, Thursday 03 November 2016(31157)
New a2l scripts for PR2 and PR3
I have made scripts that we can run that will adjust the a2l gains for PR2 and PR3. These use the same a2l engine that the test mass script does, it just sets the settings for PR2 and PR3. They can be found in the same location (just checked in): .../userapps/isc/common/scripts/decoup/a2l_min_PR*.py, where * is either 2 or 3.
Each script has been run tonight, so we now have non-zero a2l elements for both those mirrors.
Nutsinne is having trouble relocking, with instabilities around 3.5 Hz that ring up when she engages PRC1 ASC.
We removed both the new offset from POP A pit and the new a2l from PR3, hoping that this will help.Stefan's offset for POP A was -0.05, Jenne's a2l coefficients were PR3_M3_DRIVEALIGN P2L 0.85 and Y2L 1.85The problem was the new cut offs added to the PRC1 loop tonight, they seemed fine at low noise but aren't stable when the loops forst come on. We have just removed them from the gaurdain for now.
Hmmm, odd. Anyhow, the cutoffs now come on in LowNoiseASC rather than earlier.