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磁场对螺旋波等离子体波和能量吸收影响的数值研究

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成玉国, 程谋森, 王墨戈, 李小康. 2014: 磁场对螺旋波等离子体波和能量吸收影响的数值研究, 物理学报, null(3): 035203. doi: 10.7498/aps.63.035203
引用本文: 成玉国, 程谋森, 王墨戈, 李小康. 2014: 磁场对螺旋波等离子体波和能量吸收影响的数值研究, 物理学报, null(3): 035203. doi: 10.7498/aps.63.035203
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Cheng Yu-Guo, Cheng Mou-Sen, Wang Mo-Ge, Li Xiao-Kang. 2014: Numerical study on the effects of magnetic field on helicon plasma waves and energy absorption, Acta Physica Sinica, null(3): 035203. doi: 10.7498/aps.63.035203
Citation: Cheng Yu-Guo, Cheng Mou-Sen, Wang Mo-Ge, Li Xiao-Kang. 2014: Numerical study on the effects of magnetic field on helicon plasma waves and energy absorption, Acta Physica Sinica, null(3): 035203. doi: 10.7498/aps.63.035203
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磁场对螺旋波等离子体波和能量吸收影响的数值研究

  • 国防科学技术大学航天科学与工程学院,长沙,410073

Numerical study on the effects of magnetic field on helicon plasma waves and energy absorption

  • 摘要: 本文考察在径向电子数密度呈抛物形分布的情况下，外加稳恒磁场，射频通过螺旋波天线在等离子体中激发电磁波的传播性质。采用线性扰动波假设，数值求解Maxwell方程组，得到80-800 G (1 G =10-4 T)磁场条件下等离子体中径向电、磁场强度及能量沉积密度的分布情形。计算结果表明，磁场增大(80→800 G)时，螺旋波受到的阻尼较小，可深入等离子体传播；Trivelpiece-Gould (TG)波受到的阻尼增大，在等离子体-真空边界处衰减增强；整体的能量吸收向边界集中。磁感应强度小于100 G时， TG波可深入主等离子体区传播，等离子体径向能量吸收相对均匀。
    Abstract: The propagation properties of electromagnetic waves excited by helicon antenna with a parabolic radial electron density distribution in an external magnetic field were studied. Maxwell equations are numerically solved using the linear disturbance wave assumption to obtain energy distribution, when the magnetic intensity changes from 80 to 800 G. The radial electromagnetic wave and energy deposition intensity distributions were obtained. Results show that when magnetic intensity grows, the helicon wave is little damped and it can propagate into the bulk plasma; Trivelpiece-Gould (TG) wave is heavily damped at plasma-vacuum interface;the main energy absorption region moves towards the boundary gradually. When the magnetic intensity is lower than 100 G, the TG wave can propagate into the bulk plasma, and the plasma radial energy distribution is relatively uniform.
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  • 刊出日期:  2014-02-15

磁场对螺旋波等离子体波和能量吸收影响的数值研究

  • 国防科学技术大学航天科学与工程学院,长沙,410073

摘要: 本文考察在径向电子数密度呈抛物形分布的情况下，外加稳恒磁场，射频通过螺旋波天线在等离子体中激发电磁波的传播性质。采用线性扰动波假设，数值求解Maxwell方程组，得到80-800 G (1 G =10-4 T)磁场条件下等离子体中径向电、磁场强度及能量沉积密度的分布情形。计算结果表明，磁场增大(80→800 G)时，螺旋波受到的阻尼较小，可深入等离子体传播；Trivelpiece-Gould (TG)波受到的阻尼增大，在等离子体-真空边界处衰减增强；整体的能量吸收向边界集中。磁感应强度小于100 G时， TG波可深入主等离子体区传播，等离子体径向能量吸收相对均匀。

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