### Abstract

Original language | English |
---|---|

Pages (from-to) | 244-260 |

Number of pages | 17 |

Journal | Fusion Technology |

Volume | 29 |

Issue number | 2 |

DOIs | |

Publication status | Published - 1996 |

MoE publication type | A1 Journal article-refereed |

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*Fusion Technology*,

*29*(2), 244-260. https://doi.org/10.13182/FST96-A30711

}

*Fusion Technology*, vol. 29, no. 2, pp. 244-260. https://doi.org/10.13182/FST96-A30711

**Collisionless diffusion of particles and current across a magnetic field in beam/plasma interaction.** / Manfredi, G.; Shoucri, M.; Shkarofsky, I.; Ghizzo, Alain; Bertrand, Pierre; Fijalkov, Eric; Feix, March; Karttunen, Seppo; Pättikangas, Timo; Salomaa, Rainer.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Collisionless diffusion of particles and current across a magnetic field in beam/plasma interaction

AU - Manfredi, G.

AU - Shoucri, M.

AU - Shkarofsky, I.

AU - Ghizzo, Alain

AU - Bertrand, Pierre

AU - Fijalkov, Eric

AU - Feix, March

AU - Karttunen, Seppo

AU - Pättikangas, Timo

AU - Salomaa, Rainer

PY - 1996

Y1 - 1996

N2 - A drift-kinetic Eulerian Vlasov code with fluid equations for the ions is used to study the collisionless diffusion of particles and current across a magnetic field for the case of an electron beam injected near the edge of a two-dimensional magnetized plasma slab. The case of a magnetic field tilted with respect to the beam direction at an angle of theta = 10 deg is considered. Test particles diagnostic techniques are used to study the evolution of the phase space at different locations across the plasma slab. We analyze the anomalous diffusion process triggered by the beam-plasma instability and induced in space across the magnetic field by the Kelvin-Helmholtz instability and the velocity space diffusion induced along the magnetic field due to the kinetic effects of the beam-plasma instability. In the present slab geometry it is found that the collisionless diffusion coefficients D-y and D-upsilon 1, describing respectively the anomalous diffusion in physical space and in velocity space, are related by the relation D-y= D-upsilon 1 tan(2) theta/omega(ce)(2). This relation, which links the electron dynamics in the x-y real space and in the y-upsilon(1) phase space, is verified accurately using the test particles diagnostic techniques. The Vlasov code associated with test particles techniques provides a powerful tool to study particle diffusion in space and in phase space, especially in the low-density regions of the distribution function.

AB - A drift-kinetic Eulerian Vlasov code with fluid equations for the ions is used to study the collisionless diffusion of particles and current across a magnetic field for the case of an electron beam injected near the edge of a two-dimensional magnetized plasma slab. The case of a magnetic field tilted with respect to the beam direction at an angle of theta = 10 deg is considered. Test particles diagnostic techniques are used to study the evolution of the phase space at different locations across the plasma slab. We analyze the anomalous diffusion process triggered by the beam-plasma instability and induced in space across the magnetic field by the Kelvin-Helmholtz instability and the velocity space diffusion induced along the magnetic field due to the kinetic effects of the beam-plasma instability. In the present slab geometry it is found that the collisionless diffusion coefficients D-y and D-upsilon 1, describing respectively the anomalous diffusion in physical space and in velocity space, are related by the relation D-y= D-upsilon 1 tan(2) theta/omega(ce)(2). This relation, which links the electron dynamics in the x-y real space and in the y-upsilon(1) phase space, is verified accurately using the test particles diagnostic techniques. The Vlasov code associated with test particles techniques provides a powerful tool to study particle diffusion in space and in phase space, especially in the low-density regions of the distribution function.

U2 - 10.13182/FST96-A30711

DO - 10.13182/FST96-A30711

M3 - Article

VL - 29

SP - 244

EP - 260

JO - Fusion Science and Technology

JF - Fusion Science and Technology

SN - 1536-1055

IS - 2

ER -