The spherical multipole resonance probe: kinetic damping in its spectrum
The spherical multipole resonance probe: kinetic damping in its spectrum
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DOI：
10.1088/1361-6595/ab759f
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发表时间：
2019-11
影响因子：
3.8
通讯作者：
J. Oberrath
中科院分区：
文献类型：
--
作者：
J. Oberrath
多极共振探针是最近开发的测量设备之一，用于基于有源等离子体共振光谱的概念测量等离子体参数，如电子密度和温度。探针和等离子体之间的静电，动力学描述的动态相互作用可以建模在一个抽象的符号的基础上的功能分析方法。这些方法提供了一个机会，得到一个一般的解决方案，这是作为探针等离子体系统的响应函数。它是由一个适当的动力算子的预解式的矩阵元素定义的。基于一般解，可以预测消失压力的剩余阻尼，并且只能用动力学效应来解释。本文导出了多极共振探头的显式响应函数。因此，预解式由其基于正交基函数展开的代数表示确定。这使我们能够计算近似的响应函数及其相应的频谱，这表明由于动力学效应的额外阻尼。
The multipole resonance probe is one of the more recently developed measurement devices to measure plasma parameters like electron density and temperature based on the concept of active plasma resonance spectroscopy. The dynamical interaction between the probe and the plasma in an electrostatic, kinetic description can be modeled in an abstract notation based on functional analytic methods. These methods provide the opportunity to derive a general solution, which is given as the response function of the probe-plasma system. It is defined by the matrix elements of the resolvent of an appropriate dynamical operator. Based on the general solution a residual damping for vanishing pressure can be predicted and can only be explained by kinetic effects. Within this manuscript an explicit response function of the multipole resonance probe is derived. Therefore, the resolvent is determined by its algebraic representation based on an expansion in orthogonal basis functions. This allows us to compute an approximated response function and its corresponding spectra, which show additional damping due to kinetic effects.