External Magnetic Field Effects in Magnetically Insulated Line Oscillators

The magnetically insulated line oscillator (MILO) is a compact, high power microwave source which operates in a crossed-field configuration via a self-generated azimuthal magnetic field. Capable of producing multi-GW output, MILOs are among the most powerful high power microwave sources, but typically suffer from low
$(< 10\%)$
efficiency and require very high drive current (50–100 kA) [1].