Particle tracking in curvilinear coordinate systems #37
Description
This has been a long-standing feature which I haven't got round to implementing and I wanted to get an issue up to track any ideas I do have about it.
AEGIS currently can only do tracking in Cartesian coordinates, since particles follow field lines exactly a more accurate way of describing this would be field line tracing. In order to trace these curved field lines accurately in Cartesian coordinates a particularly small step size is required. Curvilinear tracking will be more "natural" to the field lines requiring much fewer straight line segments to be required.