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Gyrokinetic Analysis of Influence of Electron Beam Eccentricity on Operation of Higher-Order Mode in a Coaxial Cavity Gyrotron

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Abstract

A gyrokinetic analysis is presented to the influence of the electron beam eccentricity on the power and starting current of a coaxial cavity gyrotron, which operates in a higher-order mode TE31, 17, 1 with a frequency of 165 GHz. It is found that the starting current becomes larger because of the existence of the electron-beam eccentricity. Especially, the power will be decreased substantially by the electron beam eccentricity, for example, down to 93% of the power without any eccentricity even if the eccentricity is 1% of the outer conductor radius. The acceptable range of the electron beam voltage and operating magnetic field for the establishment of the electromagnetic oscillation is narrowed by the electron-beam eccentricity.

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Authors and Affiliations

  1. Institute of Photoelectronics, Southwest Jiaotong University, Chengdu, Sichuan, 610031, People's Republic of China

    Shi-Chang Zhang

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  1. Shi-Chang Zhang
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Zhang, SC. Gyrokinetic Analysis of Influence of Electron Beam Eccentricity on Operation of Higher-Order Mode in a Coaxial Cavity Gyrotron. International Journal of Infrared and Millimeter Waves 22, 571–576 (2001). https://doi.org/10.1023/A:1010668904042

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  • DOI: https://doi.org/10.1023/A:1010668904042

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