Relativistic Spherical Plasma Waves in a Collisional and Warm Plasma
Zhong-Kui Kuang1,2 , Li-Hong Cheng1,3 , Pan-Fei Geng1 , Rong-An Tang1 , Ju-Kui Xue1**
1 College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 7300702 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 7300003 School of Science, Guizhou University of Engineering Science, Bijie 551700
Abstract ：Under Lagrange coordinates, the relativistic spherical plasma wave in a collisional and warm plasma is discussed theoretically. Within the Lagrange coordinates and using the Maxwell and hydrodynamics equations, a wave equation describing the relativistic spherical wave is derived. The damped oscillating spherical wave solution is obtained analytically using the perturbation theory. Because of the coupled effects of spherical geometry, thermal pressure, and collision effect, the electron damps the periodic oscillation. The oscillation frequency and the damping rate of the wave are related to not only the collision and thermal pressure effect but also the space coordinate. Near the center of the sphere, the thermal pressure significantly reduces the oscillation period and the damping rate of the wave, while the collision effect can strongly influence the damping rate. Far away from the spherical center, only the collision effect can reduce the oscillation period of the wave, while the collision effect and thermal pressure have weak influence on the damping rate.
收稿日期: 2018-04-27
出版日期: 2018-11-23
:
52.35.-g
(Waves, oscillations, and instabilities in plasmas and intense beams)
52.20.Hv
(Atomic, molecular, ion, and heavy-particle collisions)
52.27.Ny
(Relativistic plasmas)
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2018, Vol. 35 
