Ivlev A V, Sütterlin R, Steinberg V, Zuzic M, Morfill G
Max-Planck-Institut für Extraterrestrische Physik, D-85740 Garching, Germany.
Phys Rev Lett. 2000 Nov 6;85(19):4060-3. doi: 10.1103/PhysRevLett.85.4060.
A new simple method to measure the spatial distribution of the electric field in the plasma sheath is proposed. The method is based on the experimental investigation of vertical oscillations of a single particle in the sheath of a low-pressure radio-frequency discharge. It is shown that the oscillations become strongly nonlinear as the amplitude increases. The theory of anharmonic oscillations provides a good quantitative description of the data and gives estimates for the first two anharmonic terms in an expansion of the sheath potential around the particle equilibrium.
提出了一种测量等离子体鞘层中电场空间分布的新的简单方法。该方法基于对低压射频放电鞘层中单个粒子垂直振荡的实验研究。结果表明，随着振幅增加，振荡变得强烈非线性。非谐振荡理论对数据提供了很好的定量描述，并给出了粒子平衡附近鞘层电势展开式中前两个非谐项的估计值。
