ARM : X
TEMP ITM : 92.0
TEMP ETM : 46.1
NUM : 10
IFO REFL HWP : 152.0
PSL HWP : 173.0
IMC POWER : 5.4
VALUE : 1371.1
ERROR : 10.4
Measured data is stored to /users/Commissioning/data/Finesse/Xarm/20250613-015257
the different of the laser power at the IMC TRANS(IMC POWER).
In previous case, the IMC POWER value was 6.5, but in this case, the IMC POWER value was 5.4 (PSL HWP = 173, same )
Actually, when I checked the signal of last increasing laser power state, PSL HWP=173 corresponds 5.2 W.
If we check the similar measurement, we need to set the target PSL HWP = 177 (6.9 W)
Also, not only Xarm, but also Yarm finesse value was small, so if we check more carefully, it would be better to measure the finesse with changing the target PSL_HWP in the script.
Thank you for the finesse measurement, and these results would suggest that we may still need to measure the finesse more frequently for a while.
Should we keep sam IMC output power or PSL_HWP value?
Fig.1. 13th June
Fig.2. Today 4th July
