Wavenumber shift due to nonlinear plasma and wave interaction

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4952622· OSTI ID:22600160

Gan, Chunyun; Xiang, Nong; Yu, Zhi; Yang, Youlei; Ou, Jing ^[1]

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1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China and Center for Magnetic Fusion Theory, Chinese Academy of Sciences, Hefei (China)

Wavenumber shift of the ion Bernstein wave has been observed in the particle-in-cell simulations when the input power of the injected wave is sufficiently large. It is demonstrated that the increase of the total kinetic energy of ions, including both the thermal energy related to the random thermal motion and the oscillation energy due to the coherent motion with the wave, gives rise to such change of the wavenumber. However, the velocity distribution function of the ions can approximately be fitted as a Maxwellian distribution function, and thus, the linear dispersion relation still holds, provided that the initial ion temperature is replaced by the effective temperature measured in the simulation.

• OSTI ID: 22600160
• Journal Information: Physics of Plasmas, Vol. 23, Issue 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APPROXIMATIONS
BERNSTEIN MODE
DISPERSION RELATIONS
DISPERSIONS
DISTRIBUTION
DISTRIBUTION FUNCTIONS
INTERACTIONS
ION TEMPERATURE
IONS
KINETIC ENERGY
NONLINEAR PROBLEMS
OSCILLATIONS
PARTICLES
PLASMA WAVES
SIMULATION