The situation was not changed from Jan. 2026, we may not need to tune the gain.
https://klog.icrr.u-tokyo.ac.jp/osl/?r=36150
thank you for measuring. i have one question. do you compensate the DARM cavity pole for RSE in this measurements? because RSE cavity pole should be changed from PRFPMI one.
I locked the ALS CARM and measured the transfer function, so I didn't try ALS DARM lock yet.
Sorry. I'm talking about not ALS_DARM "lock" but the ALS_DARM "sensor". You measured the TFs from EX actuators to ALS_DARM sensor, K1:LSC-ALS_DARM_OUT. This ALS_DARM sensor has a pseudo CP filter to mimic an IR DARM responce. For example, in the PRFPMI case, There is the CP filter, which is labeled as "CP_PRFPMI", in FM2 of this filter bank. In other words, for RSE, you need a filter corresponding to the ALS_DARM_OUT filter bank that is matched to the RSE CP because RSE CP differs from PRFPMI CP. My question is: Have you performed that operation?
But, even if that operation wasn't performed, it's very good to know that the actuators themselves have not changed since PRFPMI.