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Regimes of enhanced electromagnetic emission in beam-plasma interactions. / Timofeev, I. V.; Annenkov, V. V.; Arzhannikov, A. V.
в: Physics of Plasmas, Том 22, № 11, 113109, 01.11.2015.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Regimes of enhanced electromagnetic emission in beam-plasma interactions
AU - Timofeev, I. V.
AU - Annenkov, V. V.
AU - Arzhannikov, A. V.
N1 - Publisher Copyright: © 2015 AIP Publishing LLC. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - The ways to improve the efficiency of electromagnetic waves generation in laboratory experiments with high-current relativistic electron beams injected into a magnetized plasma are discussed. It is known that such a beam can lose, in a plasma, a significant part of its energy by exciting a high level of turbulence and heating plasma electrons. Beam-excited plasma oscillations may simultaneously participate in nonlinear processes resulting in a fundamental and second harmonic emissions. It is obvious, however, that in the developed plasma turbulence the role of these emissions in the total energy balance is always negligible. In this paper, we investigate whether electromagnetic radiation generated in the beam-plasma system can be sufficiently enhanced by the direct linear conversion of resonant beam-driven modes into electromagnetic ones on preformed regular inhomogeneities of plasma density. Due to the high power of relativistic electron beams, the mechanism discussed may become the basis for the generator of powerful sub-terahertz radiation.
AB - The ways to improve the efficiency of electromagnetic waves generation in laboratory experiments with high-current relativistic electron beams injected into a magnetized plasma are discussed. It is known that such a beam can lose, in a plasma, a significant part of its energy by exciting a high level of turbulence and heating plasma electrons. Beam-excited plasma oscillations may simultaneously participate in nonlinear processes resulting in a fundamental and second harmonic emissions. It is obvious, however, that in the developed plasma turbulence the role of these emissions in the total energy balance is always negligible. In this paper, we investigate whether electromagnetic radiation generated in the beam-plasma system can be sufficiently enhanced by the direct linear conversion of resonant beam-driven modes into electromagnetic ones on preformed regular inhomogeneities of plasma density. Due to the high power of relativistic electron beams, the mechanism discussed may become the basis for the generator of powerful sub-terahertz radiation.
UR - http://www.scopus.com/inward/record.url?scp=84969673083&partnerID=8YFLogxK
UR - https://www.elibrary.ru/item.asp?id=27156646
U2 - 10.1063/1.4935890
DO - 10.1063/1.4935890
M3 - Article
AN - SCOPUS:84969673083
VL - 22
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 11
M1 - 113109
ER -
ID: 27344685