### Abstract

Language | English |
---|---|

Article number | 084508 |

Number of pages | 5 |

Journal | Physics of Plasmas |

Volume | 22 |

Issue number | 8 |

DOIs | |

Publication status | Published - 21 Aug 2015 |

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### Keywords

- test charge
- plasma
- Maxwell equation
- hot carriers

### Cite this

*Physics of Plasmas*,

*22*(8), [084508]. https://doi.org/10.1063/1.4928901

}

*Physics of Plasmas*, vol. 22, no. 8, 084508. https://doi.org/10.1063/1.4928901

**Slowly moving test charge in a two-electron component non-Maxwellian plasma.** / Ali, Shahid; Eliasson, Bengt.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Slowly moving test charge in a two-electron component non-Maxwellian plasma

AU - Ali, Shahid

AU - Eliasson, Bengt

PY - 2015/8/21

Y1 - 2015/8/21

N2 - Potential distributions around a slowly moving test charge are calculated by taking into account the dynamics of electron-acoustic waves (EAWs) in an unmagnetized plasma. The hot electrons are assumed to be suprathermal and obey the Kappa distribution function, whereas the cold inertial electrons are described by the Vlasov equation with a Maxwellian equilibrium distribution, and the positive ions form a static neutralizing background. The test charge moves slowly in comparison between both the hot and cold electron thermal speeds and is therefore shielded by the electrons. This gives rise to a short-range Debye-Hückel potential decaying exponentially with distance and to a far field potential decaying as inverse third power of the distance from the test charge. The results are relevant for both laboratory and space plasma, where suprathermal hot electrons with power-law distributions have been observed.

AB - Potential distributions around a slowly moving test charge are calculated by taking into account the dynamics of electron-acoustic waves (EAWs) in an unmagnetized plasma. The hot electrons are assumed to be suprathermal and obey the Kappa distribution function, whereas the cold inertial electrons are described by the Vlasov equation with a Maxwellian equilibrium distribution, and the positive ions form a static neutralizing background. The test charge moves slowly in comparison between both the hot and cold electron thermal speeds and is therefore shielded by the electrons. This gives rise to a short-range Debye-Hückel potential decaying exponentially with distance and to a far field potential decaying as inverse third power of the distance from the test charge. The results are relevant for both laboratory and space plasma, where suprathermal hot electrons with power-law distributions have been observed.

KW - test charge

KW - plasma

KW - Maxwell equation

KW - hot carriers

UR - http://scitation.aip.org/content/aip/journal/pop/22/8/10.1063/1.4928901

U2 - 10.1063/1.4928901

DO - 10.1063/1.4928901

M3 - Article

VL - 22

JO - Physics of Plasmas

T2 - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 8

M1 - 084508

ER -