Nonreciprocal magnetoplasma sheath waves
Nonreciprocal magnetoplasma sheath waves
复制标题
不可逆磁等离子体鞘波
DOI：
10.1029/96rs02193
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
K. Balmain
中科院分区：
文献类型：
--
作者：
A. Luttgen;K. Balmain
我们给出了在磁场平行于厚导电圆柱体轴的情况下，方位角磁等离子体鞘层波相关的理论和实验结果。在理论方面，采用了一种平面几何结构，其中环境磁场平行于导电平面，波的传播方向垂直于磁场。结果表明，存在两种低频横向磁（TM）模式，它们以不同的传播常数沿相反方向传播，并且截止频率也不同，二者相差回旋频率。在高于上混合频率的频率处，发现了一种单向TM模式。未发现横向电（TE）模式。实验装置由一个金属圆柱体组成，圆柱体上有两个突出的径向单极天线，它们之间夹角为90°，该圆柱体放置在一个轴向磁化的实验室等离子体中。对两端口S参数的测量清楚地显示了由不同波模式沿相反方向传播所导致的非互易性。
We present theoretical and experimental results relevant to azimuthal magnetoplasma sheath waves in the case of the magnetic field parallel to the axis of a thick conducting cylinder. For the theory, a planar geometry is used with the ambient magnetic field parallel to the conducting plane and propagation perpendicular to the magnetic field. The results show two low-frequency transverse magnetic (TM) modes propagating in opposite directions with different propagation constants and also different cutoff frequencies separated by the cyclotron frequency. At frequencies above the upper hybrid frequency, one unidirectional TM mode is found. No transverse electric (TE) modes have been found. The experimental setup consists of a metallic cylinder with two protruding radial monopole antennas separated by an angle of 90°, placed in an axially magnetized laboratory plasma. Measurements of the two-port S parameters clearly show nonreciprocity caused by the propagation of different wave modes in opposite directions.