PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Landau damping of longitudinal oscillation in ultra- relativistic plasmas with nonextensive distribution |
Liu San-Qiu (刘三秋), Xiao-Chang (陈小昌) |
Department of Physics, Nanchang University, Nanchang 330031, China |
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Abstract The generalized dispersion equation for longitudinal oscillation in an unmagnetized, collisionless, isotropic and relativistic plasma is derived in the context of nonextensive q-distribution. An analytical expression for the Landau damping is obtained in an ultra-relativistic regime, which is related to q-parameter. In the limit q → 1, the result based on the relativistic Maxwellian distribution is recovered. It is shown that the interactions between the wave and particles are stronger and the waves are more strongly damped for lower values of q-parameter. The results are explained by the increased number of superthermal particles or low velocity particles contained in the plasma with the nonextensive distribution.
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Received: 03 November 2010
Revised: 25 November 2010
Accepted manuscript online:
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PACS:
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52.20.-j
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(Elementary processes in plasmas)
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52.25.Dg
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(Plasma kinetic equations)
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52.27.Ny
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(Relativistic plasmas)
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52.35.-g
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(Waves, oscillations, and instabilities in plasmas and intense beams)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10963002), the International S & T Coopera-
tion Program of China and Jiangxi Province (Grant No. 2009DFA02320), the Program for Innovative Research Team of Nanchang
University, and the National Basic Research Program of China (Grant No. 2010CB635112). |
Cite this article:
Liu San-Qiu (刘三秋), Xiao-Chang (陈小昌) Landau damping of longitudinal oscillation in ultra- relativistic plasmas with nonextensive distribution 2011 Chin. Phys. B 20 065201
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