天鹅绒与碳纳米管阴极强流脉冲发射特性  

Intense pulsed emission of velvet and carbon nanotube cathodes

作　　者：谌怡[1] 夏连胜[1] 张篁[1] 杨安民[1] 刘星光[1] 廖庆亮[2] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《强激光与粒子束》2012年第4期957-962,共6页High Power Laser and Particle Beams

基　　金：新金属材料国家重点实验室基金项目(20082D-10)

摘　　要：在2MeV直线感应加速器注入器平台上开展了天鹅绒阴极与碳纳米管阴极的强流脉冲发射特性综合实验。研究结果表明:天鹅绒阴极与碳纳米管阴极均具有强流脉冲发射性能,在1.61 MV的二极管电压下,天鹅绒阴极与碳纳米管的发射电流密度分别为84,108A/cm2;启动时间分别为21,40ns;放气量分别为0.29,0.91Pa.L;放出气体分子数目与发射电子数目之比分别为64,225;两种冷阴极强流脉冲发射时的放气质谱相似。Experiments on intense pulsed emission properties of velvet and carbon nanotube（CNT） cathodes have been conducted on the 2 MeV linear induction accelerator injector.The results show that both velvet and CNT cathodes can emit intense electron beams under 1.61 MV pulsed high voltage.The intense electron beams are 84 and 108 A/cm2 in current density,and the turn-on times are 21 and 40 ns,respectively.The amount of outgassing is estimated to be 0.29 and 0.91 Pa·L,and the number of outgassed molecules per electron is 64 and 225 for velvet and CNT cathodes.Moreover,the outgassing mass spectra of the two cathodes are similar to each other.

关 键 词：天鹅绒阴极 碳纳米管阴极 强流脉冲发射 放气 

分 类 号：TL503.3[核科学技术—核技术及应用] O462.3[理学—电子物理学]