Relativistic electron beam acceleration by nonlinear scattering of electromagnetic waves in a magnetized plasma
Abstract
Acceleration and heating of a relativistic electron beam due to nonlinear electron Landau and cyclotron damping of electromagnetic waves in a magnetized plasma are investigated theoretically and numerically on the basis of the relativistic kinetic wave and transport equations derived from the relativistic VlasovMaxwell equations. Two electromagnetic waves interact nonlinearly with the relativistic electron beam, satisfying the resonance condition of {omega}{sub k}{omega}{sub k{sup '}}(k{sub perpendicular}k{sub perpendicula=} r{sup '})v{sub d}(k{sub parallel}k{sub parallel}{sup '})v{sub b}{approx_equal}m{omega}{sub ce}, where v{sub b} and v{sub d} are the parallel and perpendicular velocities of the relativistic electron beam, respectively, and {omega}{sub ce} is the relativistic electron cyclotron frequency for the electron beam. The beat waves whose frequency is near the frequency of the extraordinary wave are excited by two electromagnetic waves. The beat waves resonate with the relativistic electron beam and accelerate efficiently. Nonlinear electron Landau and cyclotron damping of the electromagnetic waves has been studied by the numerical analysis of the relativistic nonlinear waveparticle coupling coefficients, assuming the relativistic electron beam with the relativistic drifted Maxwellian momentum distribution without the crossfield drift (v{sub d}=0), and it was verified that the highly relativistic electron beam with the energy of {beta}m{sub e}c{sup 2} < or approx. 5 TeVmore »
 Authors:

 Department of Physics, Faculty of Science, Ehime University, 25 Bunkyocho, Matsuyama 7908577 (Japan)
 Publication Date:
 OSTI Identifier:
 21069974
 Resource Type:
 Journal Article
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 15; Journal Issue: 1; Other Information: DOI: 10.1063/1.2825000; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070664X
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAMPLASMA SYSTEMS; BOLTZMANNVLASOV EQUATION; COMPARATIVE EVALUATIONS; COMPTON EFFECT; CYCLOTRON FREQUENCY; DAMPING; ELECTROMAGNETIC RADIATION; ELECTRON BEAMS; ELECTRONS; EQUATIONS OF MOTION; MAXWELL EQUATIONS; NONLINEAR PROBLEMS; NUMERICAL ANALYSIS; PLASMA ACCELERATION; PLASMA GUNS; RELATIVISTIC PLASMA; RELATIVISTIC RANGE; TEV RANGE; TRANSPORT THEORY
Citation Formats
Sugaya, R. Relativistic electron beam acceleration by nonlinear scattering of electromagnetic waves in a magnetized plasma. United States: N. p., 2008.
Web. doi:10.1063/1.2825000.
Sugaya, R. Relativistic electron beam acceleration by nonlinear scattering of electromagnetic waves in a magnetized plasma. United States. doi:10.1063/1.2825000.
Sugaya, R. Tue .
"Relativistic electron beam acceleration by nonlinear scattering of electromagnetic waves in a magnetized plasma". United States. doi:10.1063/1.2825000.
@article{osti_21069974,
title = {Relativistic electron beam acceleration by nonlinear scattering of electromagnetic waves in a magnetized plasma},
author = {Sugaya, R},
abstractNote = {Acceleration and heating of a relativistic electron beam due to nonlinear electron Landau and cyclotron damping of electromagnetic waves in a magnetized plasma are investigated theoretically and numerically on the basis of the relativistic kinetic wave and transport equations derived from the relativistic VlasovMaxwell equations. Two electromagnetic waves interact nonlinearly with the relativistic electron beam, satisfying the resonance condition of {omega}{sub k}{omega}{sub k{sup '}}(k{sub perpendicular}k{sub perpendicula=} r{sup '})v{sub d}(k{sub parallel}k{sub parallel}{sup '})v{sub b}{approx_equal}m{omega}{sub ce}, where v{sub b} and v{sub d} are the parallel and perpendicular velocities of the relativistic electron beam, respectively, and {omega}{sub ce} is the relativistic electron cyclotron frequency for the electron beam. The beat waves whose frequency is near the frequency of the extraordinary wave are excited by two electromagnetic waves. The beat waves resonate with the relativistic electron beam and accelerate efficiently. Nonlinear electron Landau and cyclotron damping of the electromagnetic waves has been studied by the numerical analysis of the relativistic nonlinear waveparticle coupling coefficients, assuming the relativistic electron beam with the relativistic drifted Maxwellian momentum distribution without the crossfield drift (v{sub d}=0), and it was verified that the highly relativistic electron beam with the energy of {beta}m{sub e}c{sup 2} < or approx. 5 TeV can be accelerated efficiently by the Compton scattering and the beatwave excited extraordinary waves, where {beta}=(1v{sub b}{sup 2}/c{sup 2}){sup 1/2}. For comparison, the equations of motion for the beam electrons trapped in the beat wave in the frame of reference moving with v{sub b} are analyzed. The detailed acceleration mechanism was clarified and the qualitative agreement with the numerical results was obtained.},
doi = {10.1063/1.2825000},
journal = {Physics of Plasmas},
issn = {1070664X},
number = 1,
volume = 15,
place = {United States},
year = {2008},
month = {1}
}