The electric (blue) and magnetic (orange) fields in an analytic model of an #RF dipole deflector. I wanted a series solution that I could use in particle tracking calculations, taking a function f(z) that's the intensity of the field on-axis and then working out the rest using Maxwell's equations and the desired frequency and symmetry. It took a while to derive and debug but it does appear to satisfy Maxwell's time-dependent equations now! #physics #accelerators