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Proceedings Paper

Magnetically tapered CARM (cyclotron autoresonance maser) for high power
Author(s): Qinsong Wang; David B. McDermott; Neville C. Luhmann
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Paper 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.

Paper Details

Date Published: 1 April 1991
PDF: 8 pages
Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); doi: 10.1117/12.43497
Show Author Affiliations
Qinsong Wang, Univ. of California/Los Angeles (United States)
David B. McDermott, Univ. of California/Los Angeles (United States)
Neville C. Luhmann, Univ. of California/Los Angeles (United States)

Published in SPIE Proceedings Vol. 1407:
Intense Microwave and Particle Beams II
Howard E. Brandt, Editor(s)

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