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Nonlinear vertical oscillations of a particle in a sheath of a rf discharge

A. V. Ivlev·R. Sütterlin·V. Steinberg·M. Zuzic·G. Morfill
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Abstract

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 and secondary harmonics are generated as the amplitude increases. The theory of anharmonic oscillations provides a good qualitative description of the data and gives estimates for the first two anharmonic terms in an expansion of the sheath potential around the particle equilibrium.

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A. V. Ivlev, R. Sütterlin, V. Steinberg, M. Zuzic, G. Morfill. 2001-04-21. Nonlinear vertical oscillations of a particle in a sheath of a rf discharge. https://doi.org/10.1103/physrevlett.85.4060

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