[Guo Chin, Yuzu]
We compared the number of lockloss with the IMCL label between 1.2 W and 10 W operation. The frequency of occurrence was 4.5 times per day during 1.2 W and 1.3 times per day during 10 W operation, respectively. This number is smaller than the number in the case of 1.2 W operation (last Feb.).
Details
- For 1.2 W operation, we checked the data of 2025-02-10 14:19:50.312500 UTC ~ 2025-02-18 14:22:44.062500 UTC.
- During this period, the number of the lockloss with the IMCL label was 3. The duration of OBSERVATION_WITHOUT_LINES (called silent run) is 57183 s.
- The frequency of occurrence is evaluated as 4.5 times per day.
- For 10 W operation, we checked the data between 2025-04-06 06:02:46.937500 UTC ~ 2025-04-21 16:50:17.687500 UTC.
- The number of lockloss with the IMCL label was 21 in this period. The duration of OBSERVATION_WITHOUT_LINES (called silent run) is 506818 s.
- The frequency of occurrence is evaluated as 1.3 times per day. This number is smaller than the number in the case of 1.2 W operation (last Feb.).
Note that we collected the lockloss only from OBSERVATION_WITHOUT_LINES (called silent run).
My guess to explain this result
- In Febrary, we didn't collect enough length of the silent run (~16 hours) with 1.2 W operation. As a result, we did't observe many lockloss (actually just 4 times) due to the oscillation of the IMC.
- After 10 W operation, we performed the interferometer as the silent run and collected enough data (~5.9 days). As a result, we observed the lockloss due to the oscillation of the IMC, many times.
We will summarize the comparison ot the ampitude to trigger the lockloss of the IMC oscillation,