Just report.
I saw error signals of ALS X became glichy from about 21:40 JST.
The gliches almost disappear about 10 minutes later (21:50 JST).
Again.
This happens in PLL X not in Y.
Actually, such glitchy behaviors have been seen for these days (before you increase the fiber amp power output, I guess). Detachar/PEM helps? (e.g. Yuzurihara-kun...)
Tomorrow I will listen to the situation from Kenta or Tanioka-san and investigate that.
PLL Y also becomes glithcy now.
But X seems okay.
Related to this issue, I made the summary page for PLL newly. Even though there is no glithc in PLL, we should have summary page. Comments to this page are welcome.
Next I will start more glitch investigation.
On the other hand, bottom left panel shows that feedback signals to laser PZT are similar. PLL_X is slightly noise.
Input referred noise are estimated by using the design value of CMS. So they are probably not so accurately.
But for PLL_Y, signal seems to be seen on both error and feedback signal above a few hundred Herz. (see top right and middle right panels.)
CMS parameters should be same (really?) for PLL_X ad PLL_Y. So a monitor channel of the error signal may be contaminated by circuit or digital noise in DAQ path.
(There is no info. about CMS for PLL_Y on JGW Wiki. It is also better to check it.)
Yamamoto-san kindly pointed out the mistake in summary page. There were same figures with incorrect legend.
I fixed that, so the latest summary page should be correct.
In addition, I changed the condition of locked PLL. Currently, the locked PLL in summary page means lock of PLL-X and PLL-Y at the same time.
