Disrupting the spatio-temporal symmetry of the electron dynamics in atmospheric pressure plasmas by voltage waveform tailoring.

IF 3.3 2区物理与天体物理 Q1 PHYSICS, FLUIDS & PLASMAS

Plasma Sources Science & Technology Pub Date : 2019-01-07 DOI:10.1088/1361-6595/aaf535

Andrew R Gibson, Zoltán Donkó, Layla Alelyani, Lena Bischoff, Gerrit Hübner, Jérôme Bredin, Scott Doyle, Ihor Korolov, Kari Niemi, Thomas Mussenbrock, Peter Hartmann, James P Dedrick, Julian Schulze, Timo Gans, Deborah O'Connell

引用次数: 0

Abstract

Single frequency, geometrically symmetric Radio-Frequency (rf) driven atmospheric pressure plasmas exhibit temporally and spatially symmetric patterns of electron heating, and consequently, charged particle densities and fluxes. Using a combination of phase-resolved optical emission spectroscopy and kinetic plasma simulations, we demonstrate that tailored voltage waveforms consisting of multiple rf harmonics induce targeted disruption of these symmetries. This confines the electron heating to small regions of time and space and enables the electron energy distribution function to be tailored.

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通过调整电压波形破坏大气压等离子体中电子动力学的时空对称性。

单频几何对称射频（rf）驱动的大气压力等离子体显示出电子加热的时间和空间对称模式，并因此显示出带电粒子密度和通量。通过结合使用相位分辨光学发射光谱和动力学等离子体模拟，我们证明了由多个射频谐波组成的定制电压波形能够有针对性地破坏这些对称性。这就将电子加热限制在时间和空间的小范围内，并使电子能量分布函数得以定制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasma Sources Science & Technology 物理-物理：流体与等离子体

CiteScore

7.10

自引率

31.60%

发文量

258

审稿时长

4.5 months

期刊介绍： Plasma Sources Science and Technology (PSST) reports on low-temperature plasmas and ionized gases operating over all ranges of gas pressure and plasma density, with varying degrees of ionization. The emphasis of PSST is on the fundamental science of these plasmas, their sources and the physical and chemical processes initiated or sustained by them, as elucidated through theoretical, computational or experimental techniques. PSST also reports on new experimentally or theoretically derived fundamental data (e.g. cross sections, transport coefficients) required for investigation of low temperature plasmas. Reports that relate to the technology and applications of these plasmas should be closely linked to the science and fundamental processes occurring in the plasma state.