Title
Comparison of electrostatic and electromagnetic simulations for very high frequency plasmas Comparison of electrostatic and electromagnetic simulations for very high frequency plasmas
Author
Faculty/Department
Faculty of Sciences. Chemistry
Publication type
article
Publication
Woodbury, N.Y. ,
Subject
Physics
Chemistry
Source (journal)
Physics of plasmas. - Woodbury, N.Y.
Volume/pages
17(2010) :11 , p. 113512,1-113512,11
ISSN
1070-664X
Article Reference
113512
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
E-info
https://repository.uantwerpen.be/docman/iruaauth/e6a7f5/79594511d60.pdf
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