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Dust ion acoustic instability with q-distribution in nonextensive statistics |
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| Authors: | Jin-Wei Dai Xiao-Chang Chen Xiao-Qing Li |
| Institution: | 1. Department of Physics, Nanchang University, Nanchang, 330031, P.R. China 2. School of Materials Science and Engineering, Nanchang University, Nanchang, 330031, P.R. China 3. Department of Physics, Nanjing Normal University, Nanjing, 210097, P.R. China |
| Abstract: | The instability of dust ion acoustic waves (DIAWs) driven by ions and electrons with different drift velocities in an unmagnetized, collisionless, isotropic dusty plasma was investigated. The electrons, ions and dust particles are assumed to be the generalized q-nonextensive distributions. The spectral indices of the q-distributions for the three plasma components are different from each other. Based on kinetic theory, the dispersion relation and the instability growth rate of DIAWs are obtained. It is found that the presence of the nonextensive distribution electrons and ions significantly modify the domain of the instability growth rate, as well as the ion-electron density ratio (ρ) and drifting-thermal velocity ratio (u i0/v Te ). In reverse, the index of dust grains has nearly no any effect on the instability growth rate. Furthermore, the effects of these parameters on the growth rate have also been discussed in detail. |
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