Sorry, I forgot to rotate the IFO_REFL_HWP...
DATE : 2023/10/31 23:37 UTC
ARM : Y
TEMP ITM : 85.4
TEMP ETM : 229.3
NUM : 10
IFO REFL HWP : 148.0
PSL HWP : 13.0
IMC POWER : 3.3
VALUE : 1293.8
ERROR : 8.6
Measured data is stored to /users/Commissioning/data/Finesse/Yarm/20231031-233712
I remeasured Y arm finesse with nominal (higher) power.
DATE : 2023/10/31 23:55 UTC
ARM : Y
TEMP ITM : 85.4
TEMP ETM : 229.3
NUM : 10
IFO REFL HWP : 168.0
PSL HWP : 20.0
IMC POWER : 5.8
VALUE : 1297.9
ERROR : 3.3
Measured data is stored to /users/Commissioning/data/Finesse/Yarm/20231031-235525
Very roughly, ~30ppm additional loss seems to remain. We would like to remove maybe water or something by warming up more.