Kinetically modified parametric instabilities of circularly polarized Alfven waves: Ion kinetic effects

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2399468· OSTI ID:20860470

Nariyuki, Y; Hada, T ^[1]

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1. E.S.S.T., Kyushu University, 6-1, Kasuga-koen, Kasuga City, Fukuoka 816-8580 (Japan)

Parametric instabilities of parallel propagating, circularly polarized, finite amplitude Alfven waves in a uniform background plasma is studied, within a framework of one-dimensional Vlasov description for ions and massless electron fluid, so that kinetic perturbations in the longitudinal direction (ion Landau damping) are included. The present formulation also includes the Hall effect. The obtained results agree well with relevant analysis in the past, suggesting that kinetic effects in the longitudinal direction play essential roles in the parametric instabilities of Alfven waves when the kinetic effects react ''passively.'' Furthermore, existence of the kinetic parametric instabilities is confirmed for the regime with small-wave-number daughter waves. Growth rates of these instabilities are sensitive to ion temperature. The formulation and results demonstrated here can be applied to Alfven waves observed in the solar wind and in the earth's foreshock region.

• OSTI ID: 20860470
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 13; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
AMPLITUDES
BOLTZMANN-VLASOV EQUATION
DISTURBANCES
ELECTRON TEMPERATURE
ELECTRONS
HALL EFFECT
ION TEMPERATURE
IONS
LANDAU DAMPING
MAGNETOHYDRODYNAMICS
ONE-DIMENSIONAL CALCULATIONS
PARAMETRIC INSTABILITIES
PLASMA
RADIATION TRANSPORT
SOLAR WIND