dorsal/arxiv
View SchemaKinetically modified parametric instabilities of circularly-polarized Alfven waves: Ion kinetic effects
| Authors | Yasuhiro Nariyuki, Tohru Hada |
|---|---|
| Categories | |
| ArXiv ID | physics/0608306 |
| URL | https://arxiv.org/abs/physics/0608306 |
| DOI | 10.1063/1.2399468 |
| Journal | Phys. Plasmas, 13, 124501, 2006 |
Abstract
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.
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"abstract": "Parametric instabilities of parallel propagating, circularly polarized finite\namplitude Alfven waves in a uniform background plasma is studied, within a\nframework of one-dimensional Vlasov description for ions and massless electron\nfluid, so that kinetic perturbations in the longitudinal direction (ion Landau\ndamping) are included. The present formulation also includes the Hall effect.\nThe obtained results agree well with relevant analysis in the past, suggesting\nthat kinetic effects in the longitudinal direction play essential roles in the\nparametric instabilities of Alfven waves when the kinetic effects react\n\"passively\". Furthermore, existence of the kinetic parametric instabilities is\nconfirmed for the regime with small wave number daughter waves. Growth rates of\nthese instabilities are sensitive to ion temperature. The formulation and\nresults demonstrated here can be applied to Alfven waves observed in the solar\nwind and in the earth\u0027s foreshock region.",
"arxiv_id": "physics/0608306",
"authors": [
"Yasuhiro Nariyuki",
"Tohru Hada"
],
"categories": [
"physics.plasm-ph"
],
"doi": "10.1063/1.2399468",
"journal_ref": "Phys. Plasmas, 13, 124501, 2006",
"title": "Kinetically modified parametric instabilities of circularly-polarized Alfven waves: Ion kinetic effects",
"url": "https://arxiv.org/abs/physics/0608306"
},
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