Magnetically tapered CARM (cyclotron autoresonance maser) for high power

Qinsong Wang; David B. McDermott; Neville C. Luhmann Jr.

doi:10.1117/12.43497

1 April 1991 Magnetically tapered CARM (cyclotron autoresonance maser) for high power

Qinsong Wang, David B. McDermott, Neville C. Luhmann Jr.

Proceedings Volume 1407, Intense Microwave and Particle Beams II; (1991) https://doi.org/10.1117/12.43497
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

A cyclotron autoresonance maser (CARM) inherently demonstrates high efficiency due to its autoresonant feature. Tapering the axial magnetic field can further enhance the CARM's already attractive efficiency. A self-consistent, three-dimensional, nonlinear numerical simulation code has been developed and used to optimize the design of CARM amplifiers, including an axial magnetic field taper. There are usually two free parameters involved in tapering the magnetic field linearly, namely, the tapering rate and taper-starting position. It will be shown in the simulation results that these parameters can be reduced to only one, that is, the tapering rate. By starting the magnetic field taper directly before the first electron crossover occurs, both optimum efficiency and growth rate can be obtained.

Citation Download Citation

Qinsong Wang, David B. McDermott, and Neville C. Luhmann Jr. "Magnetically tapered CARM (cyclotron autoresonance maser) for high power", Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); https://doi.org/10.1117/12.43497

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