Behavior of test particles in the plasma sheath upon local bias and plasma switching

Details Behavior of test particles in the plasma sheath upon local bias and plasma switching Behavior of test particles in the plasma sheath upon local bias and plasma switching

2010-10-14

arxiv.org/abs/1010.2862v1

Physics

Plasma Physics

8 pages, 10 figures

Scientific paper

Equilibrating gravitation by electric forces, microparticles can be confined in the plasma sheath above suitably biased local electrodes.Their position depends on the detailed structure of the plasma sheath and on the charge that the particles acquire in the surrounding plasma, that is by the electron and ion currents towards it. Bias switching experiments reveal how the charge and equilibrium position of the microparticle change upon altered sheath conditions. We observe similar particle behaviors also in the afterglow of the discharge for a persisting bias voltage on the electrode: damped oscillation into a new equilibrium or (accelerated) fall according to the bias.

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