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Collective processes in a microsecond relativistic electron beam: Basic rules and mechanisms

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Abstract

Collective processes taking place in the space charge of a microsecond relativistic electron beam with magnetic insulation are considered. The space-time characteristics of the low-frequency and high-frequency oscillations are found, and the effect of the magnetic compression of the beam near the cathode on these oscillations is studied. It is shown that the basic source of the low-frequency oscillations is the collective motion of the space charge, which takes place in crossed electric and magnetic fields near the cathode, while the primary reason for the high-frequency oscillations is two-stream instability in the beam. The possibility of suppressing both types of oscillations by compressing relativistic electron beams near the cathode is demonstrated. The effect of nonuniform magnetic fields, including their effect on the cathode plasma motion, is elucidated.

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Authors and Affiliations

  1. St. Petersburg State Technical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251, Russia

    E. V. Ganichev, N. V. Dvoretskaya & G. G. Sominskii

Authors
  1. E. V. Ganichev
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  2. N. V. Dvoretskaya
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  3. G. G. Sominskii
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Translated from Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 72, No. 7, 2002, pp. 106–112.

Original Russian Text Copyright © 2002 by Ganichev, Dvoretskaya, Sominski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \).

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Ganichev, E.V., Dvoretskaya, N.V. & Sominskii, G.G. Collective processes in a microsecond relativistic electron beam: Basic rules and mechanisms. Tech. Phys. 47, 900–905 (2002). https://doi.org/10.1134/1.1495056

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  • DOI: https://doi.org/10.1134/1.1495056

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