Improvement of the helical electron beam quality and the gyrotron efficiency by controlling the electric field distribution near a magnetron injection gun

A technique for controlling the electric field distribution near the cathode of a magnetron injection gun is developed. The feasibility of improving the quality of a helical electron beam by optimizing the electric field distribution in a pulsed 4-mm-wave gyrotron is studied theoretically and experi...

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Bibliographic Details
Published in:Technical physics 2012-06, Vol.57 (6), p.835-839
Main Authors: Louksha, O. I., Samsonov, D. B., Sominskii, G. G., Tsapov, A. A.
Format: Article
Language:English
Subjects:
Accelerators
Classical and Continuum Physics
Electron and Ion Beams
Electrons
Nuclear radiation
Physics
Physics and Astronomy
Plasma physics
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Summary:A technique for controlling the electric field distribution near the cathode of a magnetron injection gun is developed. The feasibility of improving the quality of a helical electron beam by optimizing the electric field distribution in a pulsed 4-mm-wave gyrotron is studied theoretically and experimentally. Field distributions are obtained that minimize the electron velocity spread in the beam, coefficient of electron reflection from a magnetic mirror, and intensity of parasitic low-frequency oscillations. It is demonstrated that the gyrotron efficiency can be increased through a rise in the beam quality at the optimized electric field distribution.
ISSN:1063-7842
1090-6525
DOI:10.1134/S1063784212060187