大气压针–板介质阻挡放电丝的时空演化
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摘要
为了分析在小间隙下介质阻挡放电丝的生成机理,以体放电和沿面放电为研究对象,探讨了其在流光放电机制下的形成过程。采用针–板介质阻挡放电装置,在大气压氩气中形成了稳定的放电。利用电学和光学方法,研究发现,随外加电压的增加放电由单丝发展为多丝,在此过程中,发光脉冲的强度增加,且半周期的发光脉冲个数也增加。对于正半周期放电的起始电压,发现其随氩气体积流量的增加而增加,随外加电压峰值的增加而减小。在纳秒曝光时间尺度下,利用高速相机对单丝放电在一个外加电压周期的时间演化过程进行了研究。发现该介质阻挡放电由气隙中的体放电和电介质板上的沿面放电两部分组成。不论电压正半周期还是电压负半周期,体放电均源于正流光机制,而沿面放电的机制与电极的极性有关。瞬时阴极上的沿面放电对应正流光传播过程,而瞬时阳极对应负流光机制。
In order to analyze the formation mechanism of the dielectric barrier discharge filament in the small gap, the discharge forming process of streamer discharge mechanism was studied by taking volume discharge and surface discharge as the research object. After using a dielectric barrier discharge device in a pin-to-plate geometry, stable discharge was generated in atmospheric pressure argon. It is found that the discharge transits from a mono-filament into a multi-filament with increasing the peak value of the applied voltage. With increasing the peak voltage, the intensity of the total light emission signal from the discharge increases as well as the light pulse number per half voltage cycle. Moreover, the inception voltage in the positive half cycle increases with increasing the argon flow rate, and decreases with increasing the peak value of applied voltage. Temporal evolution of the mono-filament discharge is investigated during one voltage cycle by an high-speed camera with an exposure time of several nanoseconds. It is found that the discharge consists of volume discharge in the air gap between the two electrodes and surface discharges on the dielectric plates. The volume discharge corresponds to a positive streamer mechanism for both the positive and the negative half voltage-cycles, however, the discharge mechanism of the surface discharge is related with the polarity of the electrode. The surface discharge on the instantaneous cathode corresponds to a positive streamer, and a negative streamer mechanism is involved for the surface discharge on the instantaneous anode.
In order to analyze the formation mechanism of the dielectric barrier discharge filament in the small gap, the discharge forming process of streamer discharge mechanism was studied by taking volume discharge and surface discharge as the research object. After using a dielectric barrier discharge device in a pin-to-plate geometry, stable discharge was generated in atmospheric pressure argon. It is found that the discharge transits from a mono-filament into a multi-filament with increasing the peak value of the applied voltage. With increasing the peak voltage, the intensity of the total light emission signal from the discharge increases as well as the light pulse number per half voltage cycle. Moreover, the inception voltage in the positive half cycle increases with increasing the argon flow rate, and decreases with increasing the peak value of applied voltage. Temporal evolution of the mono-filament discharge is investigated during one voltage cycle by an high-speed camera with an exposure time of several nanoseconds. It is found that the discharge consists of volume discharge in the air gap between the two electrodes and surface discharges on the dielectric plates. The volume discharge corresponds to a positive streamer mechanism for both the positive and the negative half voltage-cycles, however, the discharge mechanism of the surface discharge is related with the polarity of the electrode. The surface discharge on the instantaneous cathode corresponds to a positive streamer, and a negative streamer mechanism is involved for the surface discharge on the instantaneous anode.
引文
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[12]张颖,李凌寒啸,李杰,等.沿面型介质阻挡放电中高压电极配置对放电特性及臭氧产量的影响[J].高电压技术,2015,41(2):539-546.ZHAO Ying,LI Linghanxiao,LI Jie,et al.Influence of high voltage electrode configuration on discharge characteristics and ozone generation in surface dielectric barrier discharge[J].High Voltage Engineering,2015,41(2):539-546
[13]PARK G Y,PARK S J,CHOI M Y,et al.Atmospheric-pressure plasma sources for biomedical applications[J].Plasma Sources Science&Technology,2012,21(4):43001-43021.
[14]KONG M G,KROESEN G,MORFILL G,et al.Plasma medicine:an introductory review[J].New Journal of Physics,2009,11(11):1-35.
[15]TANG J,JIANG W,ZHAO W,et al.Development of a diffuse air-argon plasma source using a dielectric-barrier discharge at atmospheric pressure[J].Applied Physics Letters,2013,102(3):033503-033503-5.
[16]CHU H Y,HUANG B S.Gap-dependent transitions of atmospheric microplasma in open air[J].Physics of Plasmas,2011,18(4):332-339.
[17]TANG J,DUAN Y,ZHAO W.Characterization and mechanism studies of dielectric barrier discharges generated at atmospheric pressure[J].Applied Physics Letters,2010,96(19):191503-191503-3.
[18]AKISHEV Y,GRUSHIN M,NAPARTOVICH A,et al.Novel AC and DC non-thermal plasma sources for cold surface treatment of polymer films and fabrics at atmospheric pressure[J].Plasmas&Polymers,2002,7(3):261-289.
[19]TAY W H,KAUSIK S S,YAP S L,et al.Role of secondary emission on discharge dynamics in an atmospheric pressure dielectric barrier discharge[J].Physics of Plasmas,2014,21(4):241-271.
[20]QI B,HUANG J,QIU Y,et al.Diagnosis of the ion density in two discharge modes generated in atmospheric pressure argon with pin-to-plate dielectric barrier geometry[J].Physics of Plasmas,2011,18(8):083302-083302-6.
[21]AKISHEV Y,APONIN G,BALAKIREV A,et al.DBD surface streamer expansion described using nonlinear diffusion of the electric potential over the barrier[J].Journal of Physics D:Applied Physics,2013,46(46):771-780.
[22]SUN L,HUANG X,ZHANG J,et al.Discharge dynamics of pin-to-plate dielectric barrier discharge at atmospheric pressure[J].Physics of Plasmas,2010,17(11):1498-1506.
[23]俞哲,张芝涛,于清旋,等.针-板DBD微流注与微辉光交替生成的机理研究[J].物理学报,2012,61(19):308-316.YU Zhe,ZHANG Zhitaoyu,YU Qingxuan,et al.Atmospheric pressure streamer and glow-discharge generated alternately by pin-to-plane dielectric barrier discharge in air[J].Acta Physica Sinica,2012,61(19):308-316.
[24]CHU H Y,LIOU B T.Gap-dependent arrangements of dielectric barrier discharges in open air[J].Physics of Plasmas,2014,21(8):1181.
[25]LI X C,WANG L.Discharge characteristics in atmospheric pressure glow surface discharge in helium gas[J].Chinese Physics Letters,2005,22(2):416-419.
[26]WANG Z,REN C S,NIE Q Y,et al.Effects of airflows on dielectric barrier discharge in air at atmospheric pressure[J].Plasma Science&Technology,2009,11(2):177-180.
[27]张芝涛,张志鹏,俞哲.大气压介质阻挡微放电通道的相互作用[J].高电压技术,2015,41(9):2880-2887.ZHAO Zhitao,ZHAO Zhipeng,YU Zhe.Interaction between micro discharge channels in dielectric barrier discharge at atmospheric pressure[J].High Voltage Engineering,2015,41(9):2880-2887.
[28]TIMATKOV V V,PIETSCH G J,SAVELIEV A B,et al.Influence of solid dielectric on the impulse discharge behaviour in a needle-to-plane air gap[J].Journal of Physics D:Applied Physics,2005,38(6):877-886.
[2]KUNZE K,MICLEA M,MUSA G,et al.Diode laser-aided diagnostics of a low-pressure dielectric barrier discharge applied in element-selective detection of molecular species[J].Spectrochimica Acta Part B Atomic Spectroscopy,2002,57(1):137-146.
[3]MASSINES F,RABEHI A,DECOMPS P,et al.Experimental and theoretical study of a glow discharge at atmospheric pressure controlled by dielectric barrier[J].Journal of Applied Physics,1998,83(6):2950-2957.
[4]CUI N Y,BROWN N.Modification of the surface properties of a polypropylene(PP)film using an air dielectric barrier discharge plasma[J].Applied Surface Science,2002,189(Supplement 1/2):31-38.
[5]LITTLE U,BUCHANAN F,HARKIN-JONES E,et al.Surface modification of poly(epsilon-caprolactone)using a dielectric barrier discharge in atmospheric pressure glow discharge mode[J].Acta Biomaterialia,2009,5(6):2025-32.
[6]GEYTER N D,MORENT R,GENGEMBRE L,et al.Increasing the hydrophobicity of a PP film using a Helium/CF4 DBD treatment at atmospheric pressure[J].Plasma Chemistry&Plasma Processing,2008,28(2):289-298.
[7]BORCIA G,CAZAN R,BORCIA C.DBD surface modification of polymers in relation to the spatial distribution of reactive oxygen species[J].Plasma Chemistry&Plasma Processing,2011,31(5):729-740.
[8]DORRAKI N,SAFA N N,JAHANFAR M,et al.Surface modification of chitosan/PEO nanofibers by air dielectric barrier discharge plasma for acetylcholinesterase immobilization[J].Applied Surface Science,2015,349(15):940-947.
[9]SCHMIDT-SZALOWSKI K,R?ANEK-BOROCH Z,SENTEK J,et al.Thin films deposition from hexamethyldisiloxane and hexamethyldisilazane under dielectric-barrier discharge(DBD)conditions[J].Plasmas&Polymers,2000,5(3):173-190.
[10]STAROSTIN S A,PREMKUMAR P A,CREATORE M,et al.High current diffuse dielectric barrier discharge in atmospheric pressure air for the deposition of thin silica-like films[J].Applied Physics Letters,2010,96(6):061502-061502-3.
[11]王新新,刘凯,罗海云,等.热刺激电流测量装置及其用于介质阻挡均匀放电的研究[J].高电压技术,2015,41(1):245-250.WANG Xinxin,LIU Kai,LUO Haiyun,et al.Measurement device of thermally stimulated current and its use in uniformity research of dielectric barrier discharge[J].High Voltage Engineering,2015,41(1):245-250.
[12]张颖,李凌寒啸,李杰,等.沿面型介质阻挡放电中高压电极配置对放电特性及臭氧产量的影响[J].高电压技术,2015,41(2):539-546.ZHAO Ying,LI Linghanxiao,LI Jie,et al.Influence of high voltage electrode configuration on discharge characteristics and ozone generation in surface dielectric barrier discharge[J].High Voltage Engineering,2015,41(2):539-546
[13]PARK G Y,PARK S J,CHOI M Y,et al.Atmospheric-pressure plasma sources for biomedical applications[J].Plasma Sources Science&Technology,2012,21(4):43001-43021.
[14]KONG M G,KROESEN G,MORFILL G,et al.Plasma medicine:an introductory review[J].New Journal of Physics,2009,11(11):1-35.
[15]TANG J,JIANG W,ZHAO W,et al.Development of a diffuse air-argon plasma source using a dielectric-barrier discharge at atmospheric pressure[J].Applied Physics Letters,2013,102(3):033503-033503-5.
[16]CHU H Y,HUANG B S.Gap-dependent transitions of atmospheric microplasma in open air[J].Physics of Plasmas,2011,18(4):332-339.
[17]TANG J,DUAN Y,ZHAO W.Characterization and mechanism studies of dielectric barrier discharges generated at atmospheric pressure[J].Applied Physics Letters,2010,96(19):191503-191503-3.
[18]AKISHEV Y,GRUSHIN M,NAPARTOVICH A,et al.Novel AC and DC non-thermal plasma sources for cold surface treatment of polymer films and fabrics at atmospheric pressure[J].Plasmas&Polymers,2002,7(3):261-289.
[19]TAY W H,KAUSIK S S,YAP S L,et al.Role of secondary emission on discharge dynamics in an atmospheric pressure dielectric barrier discharge[J].Physics of Plasmas,2014,21(4):241-271.
[20]QI B,HUANG J,QIU Y,et al.Diagnosis of the ion density in two discharge modes generated in atmospheric pressure argon with pin-to-plate dielectric barrier geometry[J].Physics of Plasmas,2011,18(8):083302-083302-6.
[21]AKISHEV Y,APONIN G,BALAKIREV A,et al.DBD surface streamer expansion described using nonlinear diffusion of the electric potential over the barrier[J].Journal of Physics D:Applied Physics,2013,46(46):771-780.
[22]SUN L,HUANG X,ZHANG J,et al.Discharge dynamics of pin-to-plate dielectric barrier discharge at atmospheric pressure[J].Physics of Plasmas,2010,17(11):1498-1506.
[23]俞哲,张芝涛,于清旋,等.针-板DBD微流注与微辉光交替生成的机理研究[J].物理学报,2012,61(19):308-316.YU Zhe,ZHANG Zhitaoyu,YU Qingxuan,et al.Atmospheric pressure streamer and glow-discharge generated alternately by pin-to-plane dielectric barrier discharge in air[J].Acta Physica Sinica,2012,61(19):308-316.
[24]CHU H Y,LIOU B T.Gap-dependent arrangements of dielectric barrier discharges in open air[J].Physics of Plasmas,2014,21(8):1181.
[25]LI X C,WANG L.Discharge characteristics in atmospheric pressure glow surface discharge in helium gas[J].Chinese Physics Letters,2005,22(2):416-419.
[26]WANG Z,REN C S,NIE Q Y,et al.Effects of airflows on dielectric barrier discharge in air at atmospheric pressure[J].Plasma Science&Technology,2009,11(2):177-180.
[27]张芝涛,张志鹏,俞哲.大气压介质阻挡微放电通道的相互作用[J].高电压技术,2015,41(9):2880-2887.ZHAO Zhitao,ZHAO Zhipeng,YU Zhe.Interaction between micro discharge channels in dielectric barrier discharge at atmospheric pressure[J].High Voltage Engineering,2015,41(9):2880-2887.
[28]TIMATKOV V V,PIETSCH G J,SAVELIEV A B,et al.Influence of solid dielectric on the impulse discharge behaviour in a needle-to-plane air gap[J].Journal of Physics D:Applied Physics,2005,38(6):877-886.