高电压技术2012，Vol.38Issue(7)：1697-1703,7.
中频正弦电压下大气压氦等离子体射流的产生机理
Formation Mechanism of Helium Plasma Jet at Atmospheric Pressure Under Medium-frequency Sinusoidal Voltage
摘要
Abstract
In order to discuss the formation mechanism of He atmospheric pressure plasma jet （APPJ）, the intensified CCD （ICCD） is employed to shot the longitudinal and axial section of He APPJ. It is found that, the He APPJ is not symmetrical under positive and negative cycles of applied voltage of 17kHz Sin wave. Under positive cycle, the He APPJ which is formed as space streamer at the edge of an active electrode propagates to the nozzle of quartz tube, and then it transits to the surface discharge of which the propagation appears along the interface between He and Air in the ambient. However, under negative cycle of applied voltage, the propagation length of the He APPJ is much shorter than that under positive cycle, which presents as a classic corona discharge in He flow. Furthermore, the relationship of APPJ length and discharge modes of dielectric barrier discharge （DBD） inside tube is also investigated. With the increment of applied voltage, 6 kinds of discharge modes such as the ＇6period- doubling＂, ＂chaotic＂, 6＇streamer transit to glow＂, ＂unsymmetrical glow＂, ＂symmetrical glow＂, and ~＇glow and filament＂, appear successively, possessing different characteristics and properties in discharge current waveforms. The length of plasma plume is not only caused by the applied voltage alone but actually determined by the excited He particles density during the discharge and disturbance of gas flow caused by discharge.关键词
大气压等离子体射流（APPJ）/沿面放电/电晕放电/介质阻挡放电（DBD）/放电模式/等离子体羽流长度Key words
atmospheric pressure plasma jet (APPJ)/surface discharge/corona discharge/dielectric barrierdischarge (DBD}/discharge mode/plasma plume length分类
数理科学引用本文复制引用
邵先军,江南,张冠军,曹则贤..中频正弦电压下大气压氦等离子体射流的产生机理[J].高电压技术,2012,38(7):1697-1703,7.基金项目
国家杰出青年科学基金 （）
中央高校基本科研业务费专项资金资助项目（xjj20lOO]60）. （）
