Radio-Frequency Probes in a Nonlinear Isotropic Plasma
Radio-Frequency Probes in a Nonlinear Isotropic Plasma
复制标题
非线性各向同性等离子体中的射频探针
DOI：
10.1139/p74-042
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发表时间：
1974
影响因子：
1.2
通讯作者：
K. Balmain
中科院分区：
文献类型：
--
作者：
C. Bantin;K. Balmain
推导了非线性冷等离子体理论和标量压力理论，并将其应用于等离子体中的球形射频探头。给出了不同频率下探头上两个特定的射频电势下的二阶探头输出响应的计算结果。它们包括二次谐波、和频和差频以及直流。增量(共振整流)。作为频率函数的非线性响应强烈地依赖于输入信号是保持在恒定电流还是恒定电压；对于诊断，恒流技术允许识别等离子体频率，而恒压技术不允许。
Nonlinear cold-plasma and scalar-pressure theories are derived and applied to a spherical RF probe in a plasma. With two specified RF potentials on the probe at different frequencies, calculations are presented for the second-order probe output responses. These include the second harmonic, the sum and difference frequencies, and the d.c. increment (resonance rectification). The nonlinear response as a function of frequency is shown to depend strongly on whether the input signals are maintained at a constant current or a constant voltage; for diagnostics, the constant-current technique permits identification of the plasma frequency, whereas the constant-voltage technique does not.