Theoretical investigation of magnicon efficiency

In the output cavity of a frequency-doubling magnicon amplifier the electrons interact with a rotating TM₂₁₀ mode via a gyro-resonant mechanism. The efficiency of a magnicon may be extremely high since the electrons enter the output cavity almost completely phase-bunched and rotate in synchronism with the rf wave. Results from time-dependent simulation of the electron beam-circuit interaction of a magnicon operating at X-band are presented. Efficient (>50%), accessible and stable operation of an amplifier employing an electron beam with α≡υ_⊥/υ_z0=1, where υ_⊥ and υ_z0 are the velocity components transverse to and along the z axis, is demonstrated