Simulation and modeling of radio-frequency atmospheric pressure plasmas in the non-neutral regime

  • Radio-frequency-driven atmospheric pressure plasma jets (RF APPJs) play an essential role in many technological applications. This work studies the characteristics of these discharges in the so-called non-neutral regime where the conventional structure of a quasi-neutral bulk and an electron depleted sheath does not develop, and the electrons are instead organized in a drift-soliton-like structure that never reaches quasi-neutrality. A hybrid particle-in-cell/Monte Carlo collisions (PIC/MCC) simulation is set up, which combines a fully kinetic electron model via the PIC/MCC algorithm with a drift-diffusion model for the ions. In addition, an analytical model for the electron dynamics is formulated. The formation of the soliton-like structure and the connection between the soliton and the electron dynamics are investigated. The location of the electron group follows a drift equation, while the spatial shape can be described by Poisson–Boltzmann equilibrium in a co-moving frame. A stability analysis is conducted using the Lyapunov method and a linear stability analysis. A comparison of the numerical simulation with the analytical models yields a good agreement.

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Author:Maximilian KlichORCiDGND, Sebastian WilczekORCiDGND, Zóltán DonkóORCiDGND, Ralf Peter BrinkmannORCiDGND
Parent Title (English):Plasma sources science and technology
Publisher:IOP Publishing
Place of publication:Bristol, Vereinigtes Königreich
Document Type:Article
Date of Publication (online):2024/02/16
Date of first Publication:2022/04/07
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:COST-jet; atmospheric pressure plasma jet; hybrid particle-in-cell simulation; modeling; non-neutral discharge regime
Issue:4, Artikel 045003
First Page:045003-1
Last Page:045003-18
Institutes/Facilities:Lehrstuhl für Theoretische Elektrotechnik
Dewey Decimal Classification:Technik, Medizin, angewandte Wissenschaften / Elektrotechnik, Elektronik
open_access (DINI-Set):open_access
faculties:Fakultät für Elektrotechnik und Informationstechnik
Licence (English):License LogoCreative Commons - CC BY 4.0 - Attribution 4.0 International