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

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3176516· OSTI ID:21277288

Zhipeng, Liu; Liyan, Liu; Jiulin, Du ^[1]

---

1. Department of Physics, School of Science, Tianjin University, Tianjin 300072 (China)

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.

• OSTI ID: 21277288
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON TEMPERATURE
ELECTRONS
ION ACOUSTIC WAVES
ION TEMPERATURE
PLASMA
PLASMA INSTABILITY
SPACE