I confirmed the transmission power and reflection power for these results.
I compared the results of error signals measured five times in PIT direction and three times in YAW direction.
PIT→the 11th, 12th, 14th, first of 17th, second of 17th (klog23600 )
YAW→the 11th, 12th, 14th (klog23569 )
About REFL power
- REFL power on 14th and 17th was about 0.045-0.046. I checked the angle of HWP and it was not changed. (Figures)
There was a possibility of clipping in the process. (klog23788) - [ITMY and ETMY in PIT] The results in PIT direction on the 14th and 17th are almost the same, but it is unclear whether ASC error signal has been detected because of possible clipping.
- [ITMY in YAW] The 14th results of WFS1 in YAW direction of ITMY could be seen to go out of range.
About TRANS power
- [ETMY in PIT and YAW] TRANS power was unstable when measured ETMY on the 11th, possibly caused because it took some time since ADS was turned off (since TRANS power was Max).
About of Offset
- [ITMY in PIT] Offsets appeared in the results on the 11th and 12th, but it is not known from the time series whether they are the same on each offset of the two days. ->
- [ETMY in PIT] Offsets also appeared in the results of ETMY_PIT on the 11th and 12th, but trans power of the 11th was unstable.
- [ITMY in YAW] Offsets in the results on the 11th and 12th were linear functions and NO offset when trans power is Max. The results for the 14th were partly out of range, but the results for all days were consistent within the range, the movement is typical of an error signal.
- [ETMY in YAW] The results of WFS1 were also linear functions and NO offset when trans power is Max. And the results of the all-day WFS1 were consistent, but trans power of 11th was unstable and refl power of 14th was too small. So it is difficult to determine exactly what happened.
Summary and future plan
- Results on the 14th and 17th could have been clipped from refl power.
- Error signals in YAW direction are likely not to appear with offsets.
- Error signals in PIT direction appear with a non-constant offset from the results of the 11th and 12th.
->Before turning on the Yarm ASC, it might be better to introduce a process such as turning on ADS and measuring and inserting WFS offsets when ADS is stable.
Notes I could turn on ASC without offset in this work(klog23758). Offset could change on different days, so is not known. One way to check is to try turning ASC on again with and without OFFSET. (We will consider whether we do this.)
(Sorry for the late analysis.)