[ Izumi, Yokogawa, Sugimoto]

We investigated the cause of X arm FP cavity lost lock .
The following figure is the measurement result in about one hour from 17:30 on October 25th (UTC).

From the figure, the cause of each lock lost event occurrence is considered as follows.

(Event number and possible cause.)
1  imc lost lock
2  green laser pll lost lock
3  fss or pmc lost lock
4  fss lost lock
5  imc lost lock
6  fss or pmc lost lock
7  fss or pmc lost lock
8  fss or pmc lost lock