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arXiv 1707.07529physics.plasm-ph
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高密度等离子体中激波结构的传播

Propagation of shock structures in a high density plasma

O. Sharif

摘要:

本文对非磁化、无碰撞简并量子等离子体系统中的圆柱形和球形电声激波进行了理论研究,该系统包含两组不同的电子(一组为惯性非相对论冷电子,另一组为无惯性超相对论热电子)和带正电荷的静态离子。利用约化摄动法导出了修正的Burgers(mB)方程。结果表明,在这样的量子等离子体系统中,只有稀疏激波才能传播。简并等离子体的压力和数量密度的热和冷的电子流体,非平面的几何形状,和带正电的静态离子的影响是负责修改EASW的基本属性。平面mB激波的性质与非平面mB激波的性质有很大的不同。本研究的结果应该是有用的,在理解与空间和实验室等离子体中的非平面EAWs的非线性现象。

英文摘要:

A theoretical investigation has been made to study the cylindrical and spherical electron-acoustic shock waves (EASWs) in an unmagnetized, collisionless degenerate quantum plasma system containing two distinct groups of electrons (one inertial non-relativistic cold electrons and other inertialess ultra-relativistic hot electrons) and positively charged static ions. By employing well known reductive perturbation method the modified Burgers (mB) equation has been derived. It is seen that only rarefactive shock waves can propagate in such a quantum plasma system. The effects of degenerate plasma pressure and number density of hot and cold electron fluids, nonplanar geometry, and positively charged static ions are responsible to modify the fundamental properties of EASWs. It is also observed that the properties of planar mB shocks are quite different from those of nonplanar mB shocks. The findings of the present investigation should be useful in understanding the nonlinear phenomena associated with nonplanar EAWs in both space and laboratory plasmas.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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