MIF (General)shoichi.oshino - 10:20 Friday 04 July 2025 (34457)
Print this reportFinesse measurement Yarm 20250704DATE : 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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takaaki.yokozawa - 10:58 Friday 04 July 2025 (34458)
Print this reportI 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 reportIn 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.