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Specific features of virtual cathode formation and dynamics with allowance for the magnetic self-field of a relativistic electron beam

  • Plasma Dynamics
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Abstract

The conditions and mechanisms of virtual cathode formation in relativistic and ultrarelativistic electron beams are analyzed with allowance for the magnetic self-field for different magnitudes of the external magnetic field. The typical behavior of the critical current at which an oscillating virtual cathode forms in a relativistic electron beam is investigated as a function of the electron energy and the magnitude of the uniform external magnetic field. It is shown that the conditions for virtual cathode formation in a low external magnetic field are determined by the influence of the magnetic self-field of the relativistic electron beam. In particular, azimuthal instability of the electron beam caused by the action of the beam magnetic self-field, which leads to a reduction in the critical current of the relativistic electron beam, is revealed.

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Authors and Affiliations

  1. Saratov State University, Bol’shaya Kazach’ya ul. 112, Saratov, 410012, Russia

    S. A. Kurkin, A. A. Koronovskii & A. E. Hramov

  2. Saratov State Technical University, Politekhnicheskaya ul. 77, Saratov, 410054, Russia

    S. A. Kurkin, A. A. Koronovskii & A. E. Hramov

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  1. S. A. Kurkin
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  2. A. A. Koronovskii
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  3. A. E. Hramov
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Correspondence to S. A. Kurkin.

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Original Russian Text © S.A. Kurkin, A.A. Koronovskii, A.E. Hramov, 2013, published in Fizika Plazmy, 2013, Vol. 39, No. 4, pp. 333–344.

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Kurkin, S.A., Koronovskii, A.A. & Hramov, A.E. Specific features of virtual cathode formation and dynamics with allowance for the magnetic self-field of a relativistic electron beam. Plasma Phys. Rep. 39, 296–306 (2013). https://doi.org/10.1134/S1063780X13040065

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  • DOI: https://doi.org/10.1134/S1063780X13040065

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