Laser wakefield electron acceleration for γ-ray radiography application  

作　　者：吴玉迟 赵宗清 朱斌 董克攻 温贤伦 何颖玲 谷渝秋 张保汉 

机构地区：[1]Science and Technology on Plasma Physics Laboratory,Research Center of Laser Fusion,China Academy of Engineering Physics

出　　处：《Chinese Optics Letters》2012年第6期87-90,共4页中国光学快报（英文版）

基　　金：supported by the China Acdamy of Engineering Physics Project (No. 2006Z0202);the StateKey Program of the National Natural Science of China(No. 10535030);the National Natural Science Foundation of China (No. 10975121)

摘　　要：An electron beam is obtained using laser wakefield electron accelerator, and converted into a γ-ray source after undergoing bremsstrahlung radiation in a dense material. A quasi-monoenergetic structure is observed when the length of the plasma channel was modified. The structure has a 58-MeV peak energy, 15- mrad （full-width at half-maximum） divergence angle, and 340-pC charge. The γ-ray source generated by this high-quality electron beam is brighter and has higher spatial and temporal resolutions than other conventional sources. A γ-ray radiography demonstrational experiment is performed. Pictures of a ball with different layers made of different materials are taken. The results show a clear structure and density resolution.An electron beam is obtained using laser wakefield electron accelerator, and converted into a γ-ray source after undergoing bremsstrahlung radiation in a dense material. A quasi-monoenergetic structure is observed when the length of the plasma channel was modified. The structure has a 58-MeV peak energy, 15- mrad （full-width at half-maximum） divergence angle, and 340-pC charge. The γ-ray source generated by this high-quality electron beam is brighter and has higher spatial and temporal resolutions than other conventional sources. A γ-ray radiography demonstrational experiment is performed. Pictures of a ball with different layers made of different materials are taken. The results show a clear structure and density resolution.

关 键 词：LENGTH Laser wakefield electron acceleration for 

分 类 号：TL501[核科学技术—核技术及应用]