dorsal/arxiv
View SchemaEigenmodes and growth rates of relativistic current filamentation instability in a collisional plasma
| Authors | Mitsuru Honda |
|---|---|
| Categories | |
| ArXiv ID | physics/0312144 |
| URL | https://arxiv.org/abs/physics/0312144 |
| DOI | 10.1103/PhysRevE.69.016401 |
| Journal | Phys.Rev. E69 (2004) 016401 |
Abstract
I theoretically found eigenmodes and growth rates of relativistic current filamentation instability in collisional regimes, deriving a generalized dispersion relation from self-consistent beam-Maxwell equations. For symmetrically counterstreaming, fully relativistic electron currents, the collisional coupling between electrons and ions creates the unstable modes of growing oscillation and wave, which stand out for long-wavelength perturbations. In the stronger collisional regime, the growing oscillatory mode tends to be dominant for all wavelengths. In the collisionless limit, those modes vanish, while maintaining another purely growing mode that exactly coincides with a standard relativistic Weibel mode. It is also shown that the effects of electron-electron collisions and thermal spread lower the growth rate of the relativistic Weibel instability. The present mechanisms of filamentation dynamics are essential for transport of homogeneous electron beam produced by the interaction of high power laser pulses with plasma.
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"abstract": "I theoretically found eigenmodes and growth rates of relativistic current\nfilamentation instability in collisional regimes, deriving a generalized\ndispersion relation from self-consistent beam-Maxwell equations. For\nsymmetrically counterstreaming, fully relativistic electron currents, the\ncollisional coupling between electrons and ions creates the unstable modes of\ngrowing oscillation and wave, which stand out for long-wavelength\nperturbations. In the stronger collisional regime, the growing oscillatory mode\ntends to be dominant for all wavelengths. In the collisionless limit, those\nmodes vanish, while maintaining another purely growing mode that exactly\ncoincides with a standard relativistic Weibel mode. It is also shown that the\neffects of electron-electron collisions and thermal spread lower the growth\nrate of the relativistic Weibel instability. The present mechanisms of\nfilamentation dynamics are essential for transport of homogeneous electron beam\nproduced by the interaction of high power laser pulses with plasma.",
"arxiv_id": "physics/0312144",
"authors": [
"Mitsuru Honda"
],
"categories": [
"physics.plasm-ph",
"astro-ph"
],
"doi": "10.1103/PhysRevE.69.016401",
"journal_ref": "Phys.Rev. E69 (2004) 016401",
"title": "Eigenmodes and growth rates of relativistic current filamentation instability in a collisional plasma",
"url": "https://arxiv.org/abs/physics/0312144"
},
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