Abstract
A coaxial electrodynamic system for the amplification of microwaves with plasma filling, through which a relativistic electron beam moves, is studied theoretically. The dependences of the increments of the spatial amplification of the beam–plasma instability on the external signal frequency and the amplifier parameters are obtained. The nonlinear dynamics of the development of instability is simulated and the efficiency of the conversion of the energy of the electron beam into the energy of microwave oscillations is determined. The use of a coaxial electrodynamic system makes it possible to increase the electron beam current transported through the system, at which the instability increment and the efficiency of the conversion of the energy of directed motion of electrons also increase.
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ACKNOWLEDGMENTS
We are grateful to O.T. Loza, who initiated the performed theoretical studies, for useful discussions and interest in our work.
Funding
The work was supported by the Agreement no. 313/1689-D of 16.09.2019 with the State Corporation Rosatom.
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Translated by L. Mosina
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Kartashov, I.N., Kuzelev, M.V. The Use of a Coaxial Electrodynamic System for Amplification of Microwave Range Waves During the Development of Beam–Plasma Instability. Plasma Phys. Rep. 47, 548–556 (2021). https://doi.org/10.1134/S1063780X2106009X
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DOI: https://doi.org/10.1134/S1063780X2106009X