Fig.1. - Fig.3. showed the OLTF of the DARM, MICH and PRCL.
MICH : increased the 1.792 dB from reference, so I will add the -1.792 to FM2 in MICH2 filter bank
PRCL : reference was too old (Komori-san's update for PRCL control), I modified the reference (2025/11/04) (Fig.1.)
increased the 2.095 dB from reference, so I will add the -2.095 to FM3 in PRCL1 filter bank
Next, investigation of the CARM gain with
LSC_LOCK guardian set PRFPMI_LOCKD_WITH_3F
request VERTEX guardian to PRMI_LOCKED
(before the rotation, we want to measure the CARM OLTF)
Then, set the threshold for the LSC-REFL_PDA1_DC_OUTPUT (L2043 LSC_LOCK guardian)
In case of the REFL_HWP=155 with PRFPMI_1F RF locked, the UGF was about 8 kHz as shown in Fig.1.
Then I rotated the REFL_HWP (=135), the UGF changed to about 30 kHz, but even we rotated the HPW more, the UGF didn't change.
So I changed the IN1 gain for CARM CMS from -24 dB to -21 dB, the UGF became about 40 kHz (Fig.2.)
After discussion with Ushiba-san, we decided to change it in the Increase CARM_GAIN
L2063
self.gain = -21 #-21
CMS_CARM.gain('IN1',self.gain)
