Characterization of helicon waves in a magnetized inductive discharge
Characterization of helicon waves in a magnetized inductive discharge
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磁化感应放电中螺旋波的表征
DOI：
10.1063/1.872749
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发表时间：
1998
影响因子：
2.2
通讯作者：
N. Sadeghi
中科院分区：
文献类型：
--
作者：
A. Degeling;N. Mikhelson;R. Boswell;N. Sadeghi
在一定的磁场和输入功率水平下，测量了圆柱形磁化等离子体中螺旋波的传播和等离子体密度。从静电（E模式）到电感（H模式）耦合的耦合机制的转变是由等离子体密度的急剧变化，与波场的变化相一致，从线极化驻波，最高振幅接近天线的右手椭圆极化行波的相速度约为6×106米/秒延伸到下游区域。的过渡到H模式的解释提出在整个磁场的电导率和相关的功率沉积的趋肤深度。H模式中波场的极化可以用m=+1和-1模式之间的干涉来解释（其中m是方位角模式数）。
The propagation of helicon waves and the plasma density has been measured in a cylindrical, magnetized plasma for a range of magnetic fields and input power levels. A transition in the coupling mechanism from electrostatic (E mode) to inductive (H mode) coupling is evidenced by a sharp change in the plasma density coinciding with a change in the wave fields from a linearly polarized standing wave, with highest amplitude close to the antenna to a right-hand elliptically polarized traveling wave with a phase velocity of about 6×106 m/s extending into the downstream region. An explanation of the transition to the H mode is put forward in terms of the conductivity across the magnetic field and an associated skin depth for power deposition. The polarization of the wave fields in the H mode is interpreted in terms of the interference between m=+1 and −1 modes (where m is the azimuthal mode number).