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MIF (General)
shoichi.oshino - 10:20 Friday 04 July 2025 (34457) Print this report
Finesse measurement Yarm 20250704
DATE : 2025/07/04 00:53 UTC
ARM : Y
TEMP ITM : 39.5
TEMP ETM : 58.9
NUM : 10
IFO REFL HWP : 152.0
PSL HWP : 173.0
IMC POWER : 5.0
VALUE : 1258.9
ERROR : 13.8

Measured data is stored to /users/Commissioning/data/Finesse/Yarm/20250704-005311
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Comments to this report:
takaaki.yokozawa - 10:58 Friday 04 July 2025 (34458) Print this report
I performed the same measurement with higher IMC output power.
The finesse value slightly increased, but within the error.

DATE : 2025/07/04 01:24 UTC
ARM : Y
TEMP ITM : 39.1
TEMP ETM : 58.9
NUM : 10
IFO REFL HWP : 152.0
PSL HWP : 179.0
IMC POWER : 7.3
VALUE : 1271.8
ERROR : 10.5

Measured data is stored to /users/Commissioning/data/Finesse/Yarm/20250704-012438
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takaaki.yokozawa - 11:05 Friday 04 July 2025 (34459) Print this report
In current Finesse measurement, there are one thing
that even the target rotation of the PSL_HWP = 173 (or 179), the actual value of PSL_HWP became 174 (or 180), sometimes happened.

The Finesse value may not be affected by the beam power, but it would be better to be fixed in future.
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