High-efficiency CARM

Since the electron cyclotron auto-resonance maser (CARM) is operated with the wave refractive index being very close to unity, a little variation of the refractive index in the CARM calculations might be crucial. Therefore, a modified self-consistent one-dimensional nonlinear model was developed by exactly setting the evolving wave refractive index and keeping all second-order terms to examine the inadequacy induced by the simplification of the earlier one-dimensional models. Comparisons of the numerical results obtained by the earlier models and the modified model for a CARM amplifier reveal that the inadequate relaxation of the limited azimuthal and axial bunching region for electrons to lose energy in the earlier models was the main reason for the overestimate of the linear gain and the saturated efficiency for the fast (the slow) wave branch with initial refractive index n0<1 (n0>1). However, the earlier model with fixed n0=1 is an excellent approximation whatever linear or saturated state is considered. The efficiency dependence of a CARM amplifier on some basic operating parameters was reexamined by the modified formulations.

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Linear analysis of a multibeam cyclotron-resonance maser array

Korol

Jerby

1997

Phys. Rev. E

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The multibeam cyclotron-resonance maser ͑CRM͒ array is a new concept for compact, high-power CRM devices operating at low voltages. The CRM array studied in this paper employs low-energy electron beams, which are propagating in coupled channels in a two-dimensional periodic waveguide. A static magnetic field spirals the electrons in synchronism with a spatial harmonic of the electromagnetic wave. A matrix gaindispersion equation of the CRM-array interaction is derived in the paper. Numerical examples are presented for a comparison between CRM interactions of one, two, and three electron beams with various waveguide modes. The analysis shows that the multibeam cyclotron interaction yields a considerable gain of microwaves in selective modes.

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High-efficiency CARM

Cited by 3 publications

References 8 publications

Cyclotron Autoresonance with TE and TM Guided Waves

Cyclotron Autoresonance with TE and TM Guided Waves

Modified self-consistent nonlinear simulation of cyclotron autoresonance maser amplifiers

Linear analysis of a multibeam cyclotron-resonance maser array

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