2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83436There is not a unique solution to the electro- or magnetostatic problem where the "boundary condition" is merely a specification of the fields along a line. As a practical example, we consider the case where it is desired to have a magnetic field that that traces a helix about the z axis.Accelerator Physicstext