Generation of X-ray Emission in Repetitive Nanosecond-pulse Discharge at Atmospheric Pressure  

作　　者：ZHANG Cheng SHAO Tao YAN Ping Victor F. Tarasenko 

机构地区：[1]Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China [2]Key Laboratory of Power Electronics and Electric Drives, Chinese Academy of Sciences, Beijing 100190, China [3]Institute of High Current Electronics, Russian Academy of Sciences Tomsk 634055, Russia

出　　处：《高电压技术》2013年第9期2095-2104,共10页High Voltage Engineering

基　　金：Project supported by National NatumA Science Foundation of China（51207154, 51222701, 51211120183）, National Basic Research Program of China（973 Program） （2011 CB209402）, Opening Project of State Key Laboratory of Electrical Insulation and Power Equipment in Xi＇an Jiaotong University（EIPE12204）, Chinese Academy of Sciences Visiting Professorship for Senior Intemational Scientists（2012T1G0021）, Russian Foundation for Basic Research（#12-08-91150-FqbEH_a）.

摘　　要：Pulsed discharges can generate high power densities and high equivalent electric fields in plasma to emit X-rays,which is closely related to discharge mechanism.In this paper,discharge characteristics and X-ray emission of typical nanosecond-pulse discharges(corona,diffuse,spark or arc)are reviewed.Especially,the diffuse discharges are observed at pulse repetition frequencies up to 1 kHz.Factors influencing the discharge characteristics and X-ray emission are analyzed,such as the gap spacing,parameters of the applied pulse(amplitude,pulse repetition frequency),anode and cathode materials,and curvature radius of cathode.It is concluded that the maximum X-ray intensity is obtained in a diffuse discharge,and the X-ray intensity is affected by the pulse repetition frequency,applied voltage,anode material,and curvature radius of cathode.For example,X-ray intensity increases with the pulse repetition frequency and the atomic numbers of the anode material,but it decrease with the increase of curvature radius.It is also shown that the cathode material has no obvious influence on the X-ray intensity.Pulsed discharges can generate high power densities and high equivalent eleclric fields in plasma to emit X-rays, which is closely related to discharge mechanism. In this paper, discharge characteristics and X-ray emission of typical nanosecond-pulse discharges （corona, diffuse, spark or arc） are reviewed. Especially, the diffuse discharges are observed at pulse repetition frequencies up to 1 kHz. Factors in- fluencing the discharge characteristics and X-ray emission are analyzed, such as the gap spacing, parameters of the applied pulse （amplitude, pulse repetition frequency）, anode and cathode materials, and curvature radius of cathode. It is concluded that the maximum X-ray intensity is obtained in a diffuse discharge, and the X-ray intensity is affected by the pulse repetition frequency, applied voltage, anode material, and curvature radius of cathode. For example, X-ray intensity increases with the pulse repetition frequency and the atomic numbers of the anode material, but it decrease with the increase of curvature radius. It is also shown that the cathode material has no obvious influence on the X-ray intensity.

关 键 词：X射线发射 脉冲放电 大气压力 纳秒 脉冲重复频率 射线强度 阴极材料 曲率半径 

分 类 号：TN241[电子电信—物理电子学] O461.25[理学—电子物理学]