学术活动发布与订制系统

报告摘要：Compton scattering of a laser beam with a relativistic electron beam has been used to generate a gamma-ray beam at the High Intensity Gamma-ray Source (HIGS) facility at Duke University. In this talk, I will first report on the characteristics of a Compton gamma-ray beam. Two approaches, the analytical calculation and the Monte Carlo simulation have been developed to study the Compton scattering process and to characterize the Compton scattered beams. After these theoretical studies, three diagnostics applications will be presented. The first applications is to develop an end-to-end spectrum reconstruction method to analyze measured HIGS beam spectra. The second application is the accurate energy measurement of the electron beam using Compton scattering technique. The last application is the development of a CCD based gamma-ray imaging system. This system has become a crucial tool for HIGS operations.

报告人简介：孙长春，现就职于美国劳伦斯伯克利国家实验室，于2000年毕业于南京大学物理系，后到北京大学技术物理系攻读硕士学位。2001-2003期间年在高能物理研究所进行硕士论文研究。2003年从北京大学获得硕士学位后到美国杜克大学攻读加速器物理博士学位。博士论文题目是《康普顿伽马光源的特性研究和诊断》。2009年获得博士学位后，到劳伦斯伯克利国家实验室高等光源Advanced Light Source (ALS)做博士后研究，两年后成为Research Scientist。现在主要参与ALS-U的升级改造，负责电子储存环的设计和优化。