Step-wise excitation for the determination of the resonance frequency of a microparticle confined in a low pressure plasma

Abstract

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A novel diagnostic for dust particle size in a low-pressure nanodusty plasma based on the decay of the electron density released by laser-induced photodetachment

“…The charge of a dust particle in a plasma is mainly determined by the (local) densities and temperatures of the plasma species and by the size of the dust particle. The charge of microparticles has previously been measured using particle resonance methods 22,23 or by means of applying external electric fields. 11,12 In the case of nanodusty plasmas, the total charge density has previously been measured using laser-induced photodetachment.…”

Time-Synchronized Microwave Cavity Resonance Spectroscopy and Laser Light Extinction Measurements as a Diagnostic for Dust Particle Size and Dust Density in a Low-Pressure Radio-Frequency Driven Nanodusty Plasma

“…The charge of micrometer sized dust particles has been measured using particle resonance methods [27,28] or by applying external electric fields [29,30]. For nanodusty plasmas, the dust charge density can for instance be estimated using laser-induced photodetachment (LIP) [31].…”