just to put my mirror in perspective, the magnetic mirror
has origins in the racetrack microtron . the designers had a
double-d design where a continuous track field was
given an energy step set of tracks. Of course the design
had a ruff time having stable steps. ergo each step
was given a focus magnet.
The project was canceled unfortunately.
this is just the origin. you will not be able to infer my
path control design, btw.