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Output power variations in a plasma relativistic microwave amplifier during a 500-ns relativistic electron beam current pulse

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Abstract

A relativistic plasma microwave amplifier with a gain of about 30 dB and an output power of about 60–100 MW in the frequency range from 2.4 to 3.2 GHz is studied experimentally. The total duration of the output microwave pulse is equal to the duration of the current pulse of the driving relativistic electron beam (500 ns); however, the maximum output power is observed only within 200 ns. It is shown that variations in the output microwave power during the current pulse of the annular relativistic electron beam are caused by variations in the beam radius and thickness. Analysis of the experimental data and results of numerical simulations show that the thickness of the electron beam is determined by the density of the cathode emission current.

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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 Moscow Engineering Physics Institute, 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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Correspondence to P. S. Strelkov.

Additional information

Original Russian Text © P.S. Strelkov, V.P. Tarakanov, I.E. Ivanov, D.V. Shumeiko, 2014, published in Fizika Plazmy, 2014, Vol. 40, No. 8, pp. 738–748.

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Strelkov, P.S., Tarakanov, V.P., Ivanov, I.E. et al. Output power variations in a plasma relativistic microwave amplifier during a 500-ns relativistic electron beam current pulse. Plasma Phys. Rep. 40, 640–649 (2014). https://doi.org/10.1134/S1063780X14070083

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  • DOI: https://doi.org/10.1134/S1063780X14070083

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