Evan, Stefan With the winds calming down again, we did some more SR3 alignment work: - We noticed that for SCR1_Y AS B 36 I is still the best signal. It has - less "phase lag", presumably due to a reduced coupling to the BS. This allows us to do a high bandwith loop. - a small enough offset that servoing it to zero makes sense for reducing build-up fluctuations. - Thus we closed the yaw loop with a UGF of 3.3Hz. Engaging it is in the Guardian. - We tried to play the same game for the pitch loop, with less sucess. - all signals have some RF offset. - none of the signals seem to have low enough "phase lag" for a high BW loop. We should make sure this phase lag is not due to some broken whitening filter. - Thus for now we left pitch in the configuration described in alog 15769. Evan is now also updating the WFS relieve. We will leave DRMI locked for the night.
The DRMI guardian has a new version of the
OFFLOAD_DRMI_ASC
state. This uses the scriptoffloadOpticAlign.py
, which slowly bleeds off the M1 lock outputs of PRM, PR3, BS, SR2, SR3, SRM, and IM4 to their respective alignment sliders.