A cusp electron gun for millimeter wave gyrodevices | Zendy

Craig R. Donaldson | Zendy; Wenlong He | Zendy; A. W. Cross | Zendy; Fengping Li | Zendy; A. D. R. Phelps | Zendy; Liang Zhang | Zendy; K. Ronald | Zendy; C. W. Robertson | Zendy; C. G. Whyte | Zendy; A. R. Young | Zendy

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A cusp electron gun for millimeter wave gyrodevices

Author(s) -

Craig R. Donaldson,

Wenlong He,

A. W. Cross,

Fengping Li,

A. D. R. Phelps,

Liang Zhang,

K. Ronald,

C. W. Robertson,

C. G. Whyte,

A. R. Young

Publication year - 2010

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3374888

Subject(s) - electron gun , physics , optics , magnetic field , faraday cup , cathode ray , beam (structure) , extremely high frequency , thermionic emission , voltage , faraday cage , acceleration voltage , electron , cyclotron , atomic physics , materials science , nuclear physics , ion beam , quantum mechanics

The experimental results of a thermionic cusp electron gun, to drive millimeter and submillimeter wave harmonic gyrodevices, are reported in this paper. Using a "smooth" magnetic field reversal formed by two coils this gun generated an annular-shaped, axis-encircling electron beam with 1.5 A current, and an adjustable velocity ratio alpha of up to 1.56 at a beam voltage of 40 kV. The beam cross-sectional shape and transported beam current were measured by a witness plate technique and Faraday cup, respectively. These measured results were found to be in excellent agreement with the simulated results using the three-dimensional code MAGIC

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