Intensity noise was very high this morning, see the red trace in the first attached plot. It started to be like that yesterday night, during some of the locking tests. After some investigations, it turned out to be due to the LSC correction sent to MC2 and generated by the ALS. After switching it off, intensity noise returned to reasonable values, even though a bit larger than usual, inicating a not optimal alignment of the IMC.

Another pecualir thing is that yesterday night, while IM4 ws moved, the power on IM4_TRANS changed as well. This is a bit unexpected...