北京慢正电子强束流运行性能测试  

Performance of Beijing Intense Slow Positron Beam

作　　者：曹兴忠[1] 王宝义[1] 王平[1] 马雁云[1] 秦秀波[1] 魏龙[1] 

机构地区：[1]中国科学院高能物理研究所核分析技术重点实验室,北京100049

出　　处：《高能物理与核物理》2006年第12期1196-1199,共4页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10475096);中国科学院大型仪器专项(U-37)资助~~

摘　　要：慢正电子强束流采用高能脉冲电子束流轰击金属钽靶,以产生正负电子对的方式提供正电子,作为慢正电子束流方法学研究和薄膜材料缺陷研究的束流基础．本文是在该装置实现运行后,对慢正电子束流的强度、能散、形貌等运行性能的测试工作的介绍,以及慢正电子湮没多普勒测量系统的调试和标准样品的测量结果．Beijing intense slow positron beam has been constructed successfully, which utilizes the pulsed electron beam of the BEPC LINAC with high energy to inject into the Ta target. The system will be used to expand the methodology research on positron beam and to study the defect of film materials. The running performance of DC positron beam will be introduced in this paper, such as the intensity, the energy spread and the beam size. As the main measurement method, Doppler broadening spectrum system of positron annihilation has also been accomplished.

关 键 词：慢正电子束流 柬流强度 能散 束流形貌 正电子湮没 S参数 

分 类 号：O572[理学—粒子物理与原子核物理]