摘要
利用三阴极加速器平台,对不锈钢、黄铜、铝、天鹅绒和石墨等几种常见场致发射材料的电流发射能力、相对启动延迟时间及其抖动进行了实验研究。实验结果表明:在二极管电压近似恒定时,不锈钢阴极启动时间延迟抖动小于8 ns,天鹅绒阴极及石墨阴极启动时间延迟抖动小于4 ns;且材料在阴极频繁工作时启动时间加快;常见金属材料中不锈钢阴极的综合性能较好;非金属材料中,天鹅绒阴极的发射能力最强,且发射延迟时间最短,但考虑到天鹅绒材料严重的出气问题,非金属材料中以石墨阴极的性能为优。
The comparative studies by using a tri-cathode accelerator are presented on the cathode emission capability,relative emission delay and emission-time jitter of several common cathode materials,that is,stainless-steel,brass,aluminum,velvet and graphite.The stainless-steel has better quality than other metal cathode materials.At 300~450 kV diode voltage and 30 mm anode-cathode gap,the stainless-steel cathode emission current density is 0.78 ~1.50 kA/cm2 accordingly.With a constant diode voltage,the emission-time jitter of the stainless-steel is less than 8 ns,and both the velvet and graphite emission-time jitters are less than 4 ns.The cathode emission starting time of all those materials shortens when cathodes work shot by shot frequently.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2010年第10期2393-2396,共4页
High Power Laser and Particle Beams
关键词
三阴极加速器
阴极材料
发射特性
天鹅绒阴极
石墨阴极
相对发射延迟
tri-cathode accelerator
cathode materials
emission characteristic
velvet cathode
graphite cathode
relative emission delay
