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Dynamics of a high-current relativistic electron beam

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Abstract

The dynamics of a high-current relativistic electron beam is studied experimentally and by numerical simulation. The beam is formed in a magnetically insulated diode with a transverse-blade explosive-emission cathode. It is found experimentally that the radius of a 500-keV beam with a current of 2 kA and duration of 500 ns decreases with time during the beam current pulse. The same effect was observed in numerical simulations. This effect is explained by a change in the shape of the cathode plasma during the current pulse, which, according to calculations, leads to a change in the beam parameters, such as the electron pitch angle and the spread over the longitudinal electron momentum. These parameters are hard to measure experimentally; however, the time evolution of the radial profile of the beam current density, which can be measured reliably, coincides with the simulation results. This allows one to expect that the behavior of the other beam parameters also agrees with numerical simulations.

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Authors and Affiliations

  1. Prokhorov General Physics Institute, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    P. S. Strelkov, I. E. Ivanov & D. V. Shumeiko

  2. Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya ul. 13-2, Moscow, 127412, Russia

    V. P. Tarakanov

  3. National Research Nuclear University “MEPhI”, Kashirskoe sh. 31, Moscow, 115409, Russia

    V. P. Tarakanov

Authors
  1. P. S. Strelkov
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  2. V. P. Tarakanov
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  3. I. E. Ivanov
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  4. D. V. Shumeiko
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Corresponding author

Correspondence to P. S. Strelkov.

Additional information

Original Russian Text © P.S. Strelkov, V.P. Tarakanov, I.E. Ivanov, D.V. Shumeiko, 2015, published in Fizika Plazmy, 2015, Vol. 41, No. 6, pp. 533–541.

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Strelkov, P.S., Tarakanov, V.P., Ivanov, I.E. et al. Dynamics of a high-current relativistic electron beam. Plasma Phys. Rep. 41, 492–500 (2015). https://doi.org/10.1134/S1063780X15060057

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  • DOI: https://doi.org/10.1134/S1063780X15060057

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