Oscillatory growth behavior of multistream instabilities

Journal Article · Thu Sep 15 00:00:00 EDT 2016 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X1609004X· OSTI ID:22614083

Chen, M. X. ^[1]; Yu, M. Y. ^[2]; Wu, B. ^[3]

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1. Hefei University of Technology, School of Electronic Science and Applied Physics (China)
2. Zhejiang University, Institute for Fusion Theory and Simulation, Department of Physics (China)
3. Chinese Academy of Sciences, Institute of Plasma Physics (China)

Multistream instabilities in the one-dimensional Vlasov−Poisson system are studied numerically by using plasmas with multi-humped electron distributions. The evolution of the total wave energy of the plasma oscillations excited by (numerical) noise consists of transient, growth, and nonlinear saturation stages. It is found that, in the growth stage, the total wave energy oscillates for odd number of streams, but it does not oscillate for even number of streams. It is also found that different spectral (Fourier) modes can dominate different stages of the “linear” growth and nonlinear saturation stages.

• OSTI ID: 22614083
• Journal Information: Plasma Physics Reports, Vol. 42, Issue 9; Other Information: Copyright (c) 2016 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRONS
INSTABILITY
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
PLASMA WAVES
POISSON EQUATION
STREAMS