Design and Simulation of a Relativistic S-Band Inverted Magnetron

A Giga-Watt class Inverted relativistic Magnetron Oscillator (IMO) was designed and simulated using the massively parallel electromagnetic particle-in-cell code ICEPIC and scaling/redesign of an existing L-Band IMO. The IMO presented here is designed to operate in S-Band at low magnetic fields $(\mathrm{B}\sim 0.13\mathrm{T})$. An axial RF power extraction method is employed. This technique eliminates the need for waveguide combiners, mode conversion apparatus, and complex radiating structures. ICEPIC simulations confirm that the above features combined with the IMO’s stable, robust and reliable performance in the desired mode yield a Giga-Watt class HPM source notable for its size and absence of downstream current loss.