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Title: Influence of Plasma Unsteadiness on the Spectrum and Shape of Microwave Pulses in a Plasma Relativistic Microwave Amplifier

Abstract

Dependence of the shape of a microwave pulse in a plasma relativistic microwave amplifier (PRMA) on the initial plasma electron density in the system is detected experimentally. Depending on the plasma density, fast disruption of amplification, stable operation of the amplifier during the relativistic electron beam (REB) pulse, and its delayed actuation can take place. A reduction in the output signal frequency relative to the input frequency is observed experimentally. The change in the shape of the microwave signal and the reduction in its frequency are explained by a decrease in the plasma density in the system. The dynamics of the plasma density during the REB pulse is determined qualitatively from the experimental data by using the linear theory of a PRMA with a thin-wall hollow electron beam. The processes in a PRMA are analyzed by means of the KARAT particle-in-cell code. It is shown that REB injection is accompanied by an increase in the mean energy of plasma electrons and a significant decrease in their density.

Authors:
;  [1];  [2];  [3]
  1. Moscow State University, Faculty of Physics (Russian Federation)
  2. Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation)
  3. Russian Academy of Sciences, Joint Institute for High Temperatures (Russian Federation)
Publication Date:
OSTI Identifier:
22763294
Resource Type:
Journal Article
Journal Name:
Plasma Physics Reports
Additional Journal Information:
Journal Volume: 44; Journal Issue: 2; Other Information: Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-780X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRON BEAMS; ELECTRON DENSITY; MICROWAVE AMPLIFIERS; MICROWAVE RADIATION; PLASMA DENSITY; PULSES; RELATIVISTIC RANGE

Citation Formats

Kartashov, I. N., E-mail: igorkartashov@mail.ru, Kuzelev, M. V., E-mail: kuzelev@mail.ru, Strelkov, P. S., and Tarakanov, V. P.. Influence of Plasma Unsteadiness on the Spectrum and Shape of Microwave Pulses in a Plasma Relativistic Microwave Amplifier. United States: N. p., 2018. Web. doi:10.1134/S1063780X1802006X.
Kartashov, I. N., E-mail: igorkartashov@mail.ru, Kuzelev, M. V., E-mail: kuzelev@mail.ru, Strelkov, P. S., & Tarakanov, V. P.. Influence of Plasma Unsteadiness on the Spectrum and Shape of Microwave Pulses in a Plasma Relativistic Microwave Amplifier. United States. doi:10.1134/S1063780X1802006X.
Kartashov, I. N., E-mail: igorkartashov@mail.ru, Kuzelev, M. V., E-mail: kuzelev@mail.ru, Strelkov, P. S., and Tarakanov, V. P.. Thu . "Influence of Plasma Unsteadiness on the Spectrum and Shape of Microwave Pulses in a Plasma Relativistic Microwave Amplifier". United States. doi:10.1134/S1063780X1802006X.
@article{osti_22763294,
title = {Influence of Plasma Unsteadiness on the Spectrum and Shape of Microwave Pulses in a Plasma Relativistic Microwave Amplifier},
author = {Kartashov, I. N., E-mail: igorkartashov@mail.ru and Kuzelev, M. V., E-mail: kuzelev@mail.ru and Strelkov, P. S. and Tarakanov, V. P.},
abstractNote = {Dependence of the shape of a microwave pulse in a plasma relativistic microwave amplifier (PRMA) on the initial plasma electron density in the system is detected experimentally. Depending on the plasma density, fast disruption of amplification, stable operation of the amplifier during the relativistic electron beam (REB) pulse, and its delayed actuation can take place. A reduction in the output signal frequency relative to the input frequency is observed experimentally. The change in the shape of the microwave signal and the reduction in its frequency are explained by a decrease in the plasma density in the system. The dynamics of the plasma density during the REB pulse is determined qualitatively from the experimental data by using the linear theory of a PRMA with a thin-wall hollow electron beam. The processes in a PRMA are analyzed by means of the KARAT particle-in-cell code. It is shown that REB injection is accompanied by an increase in the mean energy of plasma electrons and a significant decrease in their density.},
doi = {10.1134/S1063780X1802006X},
journal = {Plasma Physics Reports},
issn = {1063-780X},
number = 2,
volume = 44,
place = {United States},
year = {2018},
month = {2}
}