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Proceedings Paper

Theory and simulation of the cyclotron autoresonance klystron operating at Doppler-shifted cyclotron harmonics
Author(s): Gennady T. Smirnov
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Paper Abstract

A linear analysis and numerical simulation are presented for Doppler-shifted cyclotron harmonics generated in the cyclotron autoresonance klystron 1,2 The harmonic-generation mechanism in the CARK is similar to the one in the ordinary klystron: First, an oscillation at the basic Doppler-shifted cyclotron frequency is excited in the main resonator of the CARK. Then, bunched electron beam excites harmonics in an additional quasi-optical resonator tilted to the main resonator. Because of shortening of wavelength both by harmonic-generation mechanism and Doppler effect very high frequencies are attainable in this device. For example, one could obtain radiation with wavelength of about 0 .I mm using an electron beam with the energy of electrons of about I MeV and a magnetic field of I 00 kG . It is essential, that there is no threshold condition for harmonic generation. Thus, it is possible to generate harmonics even with low electron beam current and/or poor Q-factor of a resonator. It is shown, that the efficiency of generation of the low harmonics (harmonic number 2÷5) can exceed I 0%. The efficiency of generation of the I 0th harmonic can be of the order I %. Comparative analysis of the CARK harmonic generator and the FEL harmonic generator is given

Paper Details

Date Published: 13 May 1994
PDF: 11 pages
Proc. SPIE 2154, Intense Microwave Pulses II, (13 May 1994); doi: 10.1117/12.175770
Show Author Affiliations
Gennady T. Smirnov, Institute of Electrophysics (Russia)

Published in SPIE Proceedings Vol. 2154:
Intense Microwave Pulses II
Howard E. Brandt, Editor(s)

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