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Indexed by:期刊论文

Date of Publication:2010-11-01

Journal:PHYSICS OF PLASMAS

Included Journals:SCIE、EI、Scopus

Volume:17

Issue:11

ISSN No.:1070-664X

Abstract:A two-dimensional self-consistent fluid model combined with the full set of Maxwell equations is developed to investigate an argon capacitively coupled plasma, focusing on the electromagnetic effects on the discharge characteristics at various discharge conditions The results indicate that there exist distinct differences in plasma characteristics calculated with the so-called electrostatic model (i e, without taking into account the electromagnetic effects) and the electromagnetic model (which includes the electromagnetic effects), especially at very high frequencies Indeed, when the excitation source is in the high frequency regime and the electromagnetic effects are taken into account, the plasma density increases significantly and meanwhile the ionization rate evolves to a very different distribution when the electromagnetic effects are dominant Furthermore, the dependence of the plasma characteristics on the voltage and pressure is also investigated, at constant frequency It is observed that when the voltage is low, the difference between these two models becomes more obvious than at higher voltages As the pressure increases, the plasma density profiles obtained from the electromagnetic model smoothly shift from edge-peaked over uniform to a broad maximum in the center In addition, the edge effect becomes less pronounced with increasing frequency and pressure, and the skin effect rather than the standing-wave effect becomes dominant when the voltage is high (C) 2010 American Institute of Physics [dot 10 1063/1 3519515]