Some thoughts on what is needed to make low-current cavities work
1. 10 nA is not reproducible because slits are not reproducible.
2. Average ADC value of BPMs is proportional to the current (observed, but I'm not sure I understand it -- will ask Musson). Therefore, each time we establish current we need to do the box scan (15 min if efficient).
3. Box scan method relies on assumption that the central ray did not change position -- dangerous -- but can check with holey target during production phase when we have that target.
4. Still need to swap the downstream monitor X,Y (it was not done).
5. Improvements to scripts and cleaner instructions.