Ushiba, Kokeyama

In the FPMI configuration, MICH WFS ASC PIT and YAW loops were inplemented by ASC.py.

200sec oscillation
MICH YAW is showing a slow oscillation (~200sec period) and the Yarm TRANS has been degraded. It is same observation of the last Saturday when we closed the loops (with the higher power). We will wait for a bit more and will decide what to do.

Y arm alignment drifting away
Even with the MICH loops, very slow drift degrade the Yarm TRANS for ~2000 sec until a lock loss. This trend is also seen in CHARD. Probably it is the drift of the input (PR2). We will consider to dither the input or close CHARD.