外加磁场对微空心阴极放电的影响
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摘要
采用C语言编程实现的三维系综蒙特卡罗模型研究了外加磁场对微空心阴极放电的影响。研究结果显示,当气体压强和外加电压保持不变时,在微空心阴极放电系统中加入外部磁场后,阴极方向电子密度分布变化不大,轴向和侧向电子漂移范围减小,电子能量向低能方向移动,但是外加磁场对高气压微空心阴极放电的影响整体上不如对低气压放电的影响明显。研究结果对于理解微空心阴极放电等离子体的机理具有一定的指导意义.
Three-dimensional ensemble Monte Carlo model is employed using C programming language to investigate the impact of different cathode aperture sizes to micro-hollow cathode discharges.Results show that in argon under constant pressure and voltage,when an external magnetic field is added in a microhollow cathode discharge,the distribution of electron density has not change much in cathode,and electron drift range reduces in the axial and lateral direction,and electron energy becomes lower.But the applied magnetic field has a less obvious effect on high-pressure micro-hollow cathode discharges than low-pressure discharges on the whole.The research results have a certain guiding significance on the mechanism of the micro-hollow cathode discharge plasma.
Three-dimensional ensemble Monte Carlo model is employed using C programming language to investigate the impact of different cathode aperture sizes to micro-hollow cathode discharges.Results show that in argon under constant pressure and voltage,when an external magnetic field is added in a microhollow cathode discharge,the distribution of electron density has not change much in cathode,and electron drift range reduces in the axial and lateral direction,and electron energy becomes lower.But the applied magnetic field has a less obvious effect on high-pressure micro-hollow cathode discharges than low-pressure discharges on the whole.The research results have a certain guiding significance on the mechanism of the micro-hollow cathode discharge plasma.
引文
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[2]Zheng Peichao,Wang Hongmei,Li Jianquan,et al.Characterization of an atmospheric pressure DC microplasma jet[J].Spectroscopy and Spectral Analysis(光谱学与光谱分析),2008,28(10):2224-2227(in Chinese).
[3]Pukuhara D;et al.Characterization of a microhollow cathode discharge plasma in helium or air with water vapor[J].Plasma Science and Technology,2013,15(2):129-132.
[4]Jiang Chao,Wang Youqing.New discharge configuration for mini-laser[J].Chinese Journal of Quantum Electronics(量子电子学报),2005,22(2):142-149(in Chinese).
[5]Zheng Peichao,Wang Jinmei,Hu Zhangfang.Surface modification of polyimide film with atmospheric pressure microplasma jet[J].High Voltage Engineering(高电压技术),2010,36(6):1542-1546(in Chinese).
[6]Xia Guangqing,Mao Genwang,Nader Sadeghi.Research on microhollow cathode discharge for application in electrothermal propulsion[J].Journal of Astronautic(宇航学报),2008,29(5):1607-1611(in Chinese).
[7]Moselhy M,et al.Excimer emission from cathode boundary layer discharges[J].J.Appl.Phys.,2004,95(4):1642-1649.
[8]Qin Feng,Chang Anbi,Ding Enyan,et al.Particle-in-cell simulation of pseudospark switch based on particle-incell plus Monte-Carlo collision method[J].High Power Laser and Particle Beams(强激光与粒子束),2010,22(2):447-451(in Chinese).
[9]Zheng Feiteng,Yang Zhonghai,Jin Xiaolin.The initiation phase of pseudospark discharge in a hollow cathode via P1C/MCC simulation[J].Acta Physica Sinica(物理学报),2008,57(2):990-995(in Chinese).
[10]Zhang Hongwei,Meng Lin,Yan Yang.PIC simulation of the initial discharge of a pseudospark discharge[J].Journal of University of Electronic Science and Technology of China(电子科技大学学报),2007,36(5):927-930(in Chinese).
[11]Bogaerts A,et al.Monte Carlo simulation of an analytical glow discharge:Motion of electrons,ions and fast neutrals in the cathode dark space[J].Spectrochimica Acta,1995,50B(2):179-196.
[12]Carman R J.A simulation of electron motion in the cathode sheath region of a glow discharge in argon[J].J.Phys.D:Appl.Phys.,1989,22:55-66.
[13]Chen Yongzhou,Chen Qingming,Li Jun,et al.Computer simulation of the electron motion in a helium hollow cathode discharge confined by a magnatic field[J].Acta Physica Sinica(物理学报),1998,47(10):1665-1672(in Chinese).