Abstract
The theory and simulation of cyclotron autoresonance maser (CARM) amplifiers are presented, including studies of amplifier phase stability, multimode phenomena, and susceptibility to absolute instabilities. Recent results include particle-in-cell simulations of the onset of absolute instabilities and numerical modeling of multimode effects. Phase stability studies indicate that the output phase of CARM amplifiers may be relatively insensitive to fluctuations in beam energy, pitch, and current, for optimized designs; simulations show a phase sensitivity of ∼ 2° per percent beam energy variation. An experimental design for a long-pulse 17 GHz CARM amplifier is presented.
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