Stefan, Kiwamu, Yuta  (Yes! I have ligo.org account now!)

Last night, MC could not acquire lock after the guardian update for HAM2 and HAM3. So, Evan and I turned off the MC WFS loop and tweeked MC2 alignment offsets to lock MC. After that, we turned on the MC WFS loop and it seemed OK. H1:IMC-MC2_TRANS_SUM_OUT was ~635 and H1:IMC-IM4_TRANS_SUM_OUT was ~1600.

However, the WFS loop for MC2 was actually not turned on because the switch in the filter bank H1:SUS-MC2_M1_LOCK_(P|Y) was turned off. This was actually the cause of MC2 misalignment. Also, MC input PZTs were turned off (H1:IMC-PZT_(PIT|YAW)). So, MC WFS went crazy over night.

So this morning, we relieved the feedback for MC2 (H1:IMC-MC2_PIT|YAW) to be zero. This MC WFS relief should be added to MC guardian.