CAJ | 학술논문

由于重复频率窄脉冲气体放电具有的高过电压倍数,能够稳定地激励大气压空气等离子体,近年来受到了广泛关注。为此,利用上升沿15ns、半高宽30～40ns的负极性ns脉冲激励大气压管-板电极结构空气放电,通过电压电流测量,放电图像拍摄和X射线探测研究了ns脉冲气体放电模式和X射线辐射特性。结果表明,ns脉冲放电存在电晕、弥散和丝状3种模式,各模式及其转换与气隙距离相关。放电中测得的X射线辐射能量主要集中在30～90keV。
유우중복빈솔착맥충기체방전구유적고과전압배수,능구은정지격려대기압공기등리자체,근년래수도료엄범관주。위차,이용상승연15ns、반고관30～40ns적부겁성ns맥충격려대기압관-판전겁결구공기방전,통과전압전류측량,방전도상박섭화X사선탐측연구료ns맥충기체방전모식화X사선복사특성。결과표명,ns맥충방전존재전훈、미산화사상3충모식,각모식급기전환여기극거리상관。방전중측득적X사선복사능량주요집중재30～90keV。
Repetitive nanosecond-pulse is focused on because it can provide extremely high overvoltage for excitation of non-thermal plasma at atmospheric air.With an excitation of negative repetitive pulses of 15 ns rise-time and 30~40 ns duration,characteristics of repetitive nanosecond-pulse discharge in atmospheric air with a tube-to-plane gap are investigated by the measurement of their electrical discharge parameters,images,and X-ray diffraction.Results show that nanosecond-pulse discharge has 3 discharge forms,which is corona,diffuse,and filamentary discharge,respectively,and the discharge modes and their transition are affected by the air gap spacing.In addition,it is detected that the main part of X-ray energy in X-ray diffraction locates at 30 to 90 keV.