首页|Electron characteristics and dynamics in sub-millimeter pulsed atmospheric dielectric barrier discharge
Electron characteristics and dynamics in sub-millimeter pulsed atmospheric dielectric barrier discharge
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The discharge characteristics and mechanism of sub-millimeter pulsed dielectric barrier discharge in atmospheric-pressure helium are investigated experimentally and theoretically,demonstrating that when the discharge gap distance is reduced from 1.00 mm to 0.20 mm,the discharge ignition time is reduced to approximately 40 ns and discharge intensity is enhanced in terms of the discharge optical emission intensity and density of the plasma species,(energetic electrons with energy above 8.40 eV).The simulated results show that as the discharge gap distance is further reduced to 0.10 mm,the number of energetic electrons decreases,which is attributable to the contraction of plasma bulk regime and reduction of electron density in the discharge bulk.Conversely,the proportion of energetic electrons to the total electrons in the discharge monotonically increases as the discharge gap distance is reduced from 1.00 mm to 0.10 mm.It is proposed that a gap distance of 0.12 mm is optimal to achieve a high concentration and proportion of energetic electrons in sub-millimeter pulsed atmosphere dielectric barrier discharge.
sub-millimeter pulsed dischargeplasma simulationelectron dynamics and sheath
方骏林、张亚容、卢陈梓、顾莉莉、徐少锋、郭颖、石建军
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College of Science,Donghua University,Shanghai 201620,China
Yiwu Research Institute of Fudan University,Yiwu 322099,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of China
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