Marc, Michael, Yoichi, Yuhang

Due to the earthquake reported in elog2416, we had issue of PR/BS pico-motors. To fix this problem, we opened PR/BS chambers today.

In the end, we fixed problems of PR/BS position and pico-motors. PR/BS chambers have been closed. But the air was not evacuated. Probably, we can evacuate on tomorrow.

While PR/BS chambers are open, we found issues as following:

1. PR pitch pico-motor is close to the end of range. (Figure 1)

2. BS mirror is too low, which makes the upper horizontal earthquake stop not useable.

3. BS earthquake stop is too far from mirror. The distance was reduced to be around 1mm now.