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Huynh, Cong Tuan
초강력 레이저과학 연구단
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Density filamentation nonlinearly driven by the Weibel instability in relativistic beam plasmas

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Title
Density filamentation nonlinearly driven by the Weibel instability in relativistic beam plasmas
Author(s)
Cong Tuan Huynh; Chang-Mo Ryu; Chulmin Kim
Publication Date
2022-05
Journal
Physics of Plasmas, v.29, no.5
Publisher
American Institute of Physics Inc.
Abstract
© 2022 Author(s).Density filamentation has been observed in many beam-plasma simulations and experiments. Because current filamentation is a pure transverse mode, charge density filamentation cannot be produced directly by the current filamentation process. To explain this phenomenon, several mechanisms are proposed such as the coupling of the Weibel instability to the two-stream instability, coupling to the Langmuir wave, differences in thermal velocities between the beam and return currents, the magnetic pressure gradient force, etc. In this paper, it is shown that the gradient of the Lorentz factor can, in fact, represent the nonlinear behavior of a plasma fluid and further that the nonuniform Lorentz factor distribution can give rise to electrostatic fields and density filaments. Simulation results together with theoretical analyses are presented.
URI
https://pr.ibs.re.kr/handle/8788114/11694
DOI
10.1063/5.0081199
ISSN
1070-664X
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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