[Suresh / Kiwamu]
The incident beam power going into MC was decreased down to 20 mW by rotating the HWP that we set yesterday.
A 10% beam splitter which was sitting before MCREFL_PD was replaced by a perfect reflector so that all the power goes into the PD.
And we confirmed that MC can be still locked by increasing C1IOO-MC_REFL_GAIN. Some modifications in the Autolocker script need to be done later.
Also we opened the aperture of the MC2F camera to clearly see the low power beam spot.
WE ARE READY FOR THE VENT !!
Power after the EOM = 1.27 W
Power after the HWPs and PBS = 20.2 mW
Power on MCREFL = 20 mW (MC unlocked)
MCREFL_DC = 0.66 V (with MC locked)
After we finish the measurement we will go to the low power state.