TITLE

A nonextensive approach for the instability of current-driven ion-acoustic waves in space plasmas

AUTHOR(S)
Zhipeng Liu; Liyan Liu; Jiulin Du
PUB. DATE
July 2009
SOURCE
Physics of Plasmas;Jul2009, Vol. 16 Issue 7, p072111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The instability of current-driven ion-acoustic waves in the collisionless magnetic-field-free space plasma is investigated by using a nonextensive approach. The ions and the electrons are thought of in the power-law distributions that can be described by the generalized q-Maxwellian velocity distribution and are considered with the different nonextensive q-parameters. The generalized q-wave frequency and the generalized instability q-growth rate for the ion-acoustic waves are derived. The numerical results show that the nonextensive effects on the ion-acoustic waves are not apparent when the electron temperature is much more than the ion temperature, but they are salient when the electron temperature is not much more than the ion temperature. As compared to the electrons, the ions play a dominant role in the nonextensive effects.
ACCESSION #
43493791

 

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