Controllable Axial Overmoding in an MDO

During a computational investigation of a magnetron utilizing a diffraction output, it was discovered that axial overmoding allowed more than one π mode to exist. Further investigation led to the identification of at least four distinct π modes, each with its own frequency and associated 2π/3 and 4π/3 modes, each accessible by appropriate choices of voltage and magnetic field. This result indicates that a discretely tunable GW class device is conceivable.