We have been struggling to lock all day today.
I think the root of the problem is that our alingment references are not giving us a good power recycling gain after inital alingment. The soft loops bring us back to a good alignment, but it seems like our references for the green arms are off and may need to be reset in DC readout. This means that we have had a lot of random locklosses durring the CARM offset reduction, especially durring the analog CARM transition. We have added some extra sleeps here, since we have had more sucsess doing this step by hand.
I zeroed the pit offset in POP A, because looking at the last 2 weeks of algnment, no pit offset gave us the best ranges, and the recycling gain was a bit better than the current -0.2 offset. This hasn't improved the recycling gain when we first lock much, but it does reduce the amount that the recycling gain drops when we engage CHARD, which has caused a few of our locklosses today.
We also had some bugs in the SRM_ASC high power state, which Kiwamu and I changed earlier today for the new SRM dither loop. For now I have commented out the line where it sets the gain, this morning we used a gain of -100 if anyone wants to try turning it on by hand later.
I think that the next step might be to lock at the alignment references (next time we reach DC readout) but don't want to start changing references now, so we will leave it for tonight.