Cyclotron elements geometry option: annulus sector
Suggested by @matlocha_t: provide an annulus sector as a geometry option for the cyclotron elements (CColimator, Septum, Stripper):
The shape can be described as in ANSYS (https://www.sharcnet.ca/Software/Ansys/16.2.3/en-us/help/ans_cmd/Hlp_C_CYL4.html) with a centre position (x,y), two radii (r1, r2) and two angles.