Electron surface waves in a nonuniform plasma slab
Electron surface waves in a nonuniform plasma slab
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非均匀等离子体板中的电子表面波
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
D. Cooperberg
中科院分区：
文献类型：
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作者：
D. Cooperberg
本文分析和探测了非均匀金属边界热等离子体平板中的电子表面波。这些波的色散关系的测量，以及扰动的电子密度的本征结构，揭示了一个频谱的波的频率以上和以下的峰值电子等离子体频率在板。这些波类似于在电介质束缚等离子体柱中发现的Gould-Trivelpiece和Tonks-Dattner波。测量已使用粒子在细胞模拟的氩等离子体，并与线性流体理论相比，其中的绝热近似的扰动压力。金属边界的存在导致区域附近的等离子体鞘中的流体理论崩溃，我们探讨在这一地区的理论和测量之间的差异。
Electron surface waves in a nonuniform, metal bound, thermal plasma slab have been analyzed and detected. Measurements of the dispersion relations of these waves, as well as the eigenstructure of the perturbed electron density, reveal a spectrum of waves with frequencies above and below the peak electron plasma frequency in the slab. These waves are analogous to the Gould–Trivelpiece and Tonks–Dattner waves found in dielectric bound plasma columns. Measurements have been made using particle-in-cell simulation of an argon plasma and are compared with linear fluid theory in which the adiabatic approximation is made for the perturbed pressure. The presence of the metal boundary leads to regions near the plasma sheaths in which the fluid theory breaks down; we explore the differences between theory and measurement in this region.