阴极强流多脉冲发射特性研究

Research on Multi-pulsed Intensive Electron Beam Source

实验研究了几种阴极的强流猝发多脉冲发射特性．研究结果表明,天鹅绒阴极产生的猝发强流双脉冲电子束亮度优于1×108A／(m·rad)2,而直立碳纤阴极产生的强流三脉冲电子束的亮度也优于 3×107A／(m·rad)2,并有进一步提高的可能．新型的冷场致发射阴极如纳米金刚石膜阴极和纳米碳管阴极也具有强流发射能力,实验得到的发射电流密度大于50A／cm2．文中还给出的大发射面储备式热阴极的实验结果,并对相关阴极实现稳定强流多脉冲发射的研究方向和应用前景进行了分析．

This paper is involved in multi-pulsed emission relativistic electron beams. Research results indicate that characteristics of some cathodes while generating intensive the velvet, the carbon fiber and the dispenser cathode all have the ability to generate a few kilo-ampere multi-pulsed beams with brightness better than ×10^7A/（m·rad）^2. And some new cathodes such as carbon nano-tubes and nano-diamond film also can generate a few kilo-ampere multi-pulsed electron beams. Because of the cold field emission, the beams generated by the carbon nano-tubes and the nano-diamond film are expected to be higher brightness. Some experimental results of above cathodes are present and some suggestion for farther work is also proposed.