超强飞秒激光尾波场加速产生58MeV准单能电子束实验  

Experimental generation of 58 MeV quasi-monoenergetic electron beam by ultra-intense femto-second laser wakefield

作　　者：董克攻[1,2] 谷渝秋[2] 朱斌[2] 吴玉迟[2] 曹磊峰[2] 何颖玲[2] 刘红杰[2] 洪伟[2] 周维民[2] 赵宗清[2] 焦春晔[2] 温贤伦[2] 张保汉[2] 王晓方[1] 

机构地区：[1]中国科学技术大学近代物理系,中国科学院基础等离子体物理重点实验室,合肥230026 [2]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《物理学报》2010年第12期8733-8738,共6页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:10535030);国家自然科学基金(批准号:10876039);中国工程物理研究院科学技术基金重大项目(批准号:2006Z0202)资助的课题~~

摘　　要：超短超强激光与等离子体相互作用产生的激光尾波场可以在毫米尺度上加速产生高能量的准单能电子束.在SILEX-Ⅰ激光装置上进行的激光尾波场加速实验中,利用超强飞秒激光与超声速锥形喷嘴产生的2.7mm直径氦气气体柱相互作用,获得了能散为15.5%、发散角为15mrad、能量为58MeV的准单能电子束.在70TW激光照射下获得的电子束总电量达到15.4nC.介绍了实验条件、方法和主要实验结果.Monoenergetic electron bunches can be generated by the interaction between the ultra-intense laser and underdense plasma on the mm scale.In the experiment conducted on the SILEX-Ⅰ,by the interaction between an ultra-intense femtosecond laser pulse and 2.7 mm supersonic He gas jet,a 58 MeV quasi-monoenergetic electron beam with 15.5% energy spread and 15 mrad beam divergence is produced.The total charge of the electron beam is about 15.4 nC when the laser power is 70 TW.In this paper the experimental conditions,the method and main results are presented.

关 键 词：激光尾波场 电子加速 空泡 自聚焦 

分 类 号：O572.211[理学—粒子物理与原子核物理]