We started the DRMI 1F commissioning.
Initial alignment Xarm, Yarm, OMC and DRMI.
During the DRMI ADS, we found AS34I value became lower with the drift of the SRM.
So we stopped the SRM ADS (IMMT2 and PRM worked)
We measured the OLTF for MICH, PRCL and SRCL. (Fig.1. - Fig.3.)
We need to check the shape of PRCL OLTF.
We found 70 - 80 Hz oscillation when the AS34I value became lower (<0.6?)
Hirose-san will report the reason later.
We tried to measure the phasing of the SRM ADS again (Fig.4. and Fig.5.)
SRM P : -172 deg (prev. -27.2 deg)
SRM Y : 4.0 deg (prev. -25.1 deg)
After input the measured phase, SRM ADS seemed working well (Fig.6.)
P : -143.7 deg (prev. -56.7)
Y : 103.1 deg (prev. -26.6)
But when we turned on the BS ADS, IFO locked loss, still we need to investigate the BS ADS.
In Fig.2. we can see the peak of BS TM Y (green) at the 22.125 Hz, that imply the actuator of pitch direction affect to the yaw direction.
