Generation and measurement of sub-picosecond electron bunch in photocathode rf gun  

作　　者：李伟伟 何志刚 贾启卡 

机构地区：[1]National Synchrotron Radiation Laboratory, University of Science and Technology of China

出　　处：《Chinese Physics C》2013年第12期88-92,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11205152);Science Foundation of Ministry of Education of China("985 project":173123200402002)

摘　　要：We consider a scheme to generate a sub-picosecond electron bunch in the photocathode rf gun by im-proving the acceleration gradient in the gun, suitably tuning the bunch charge, the laser spot size and the acceleration phase, and reducing the growth of transverse emittance by laser shaping. A nondestructive technique is also reported to measure the electron bunch length, by measuring the high-frequency spectrum of wakefield radiation which is caused by the passage of a relativistic electron bunch through a channel surrounded by a dielectric.We consider a scheme to generate a sub-picosecond electron bunch in the photocathode rf gun by im-proving the acceleration gradient in the gun, suitably tuning the bunch charge, the laser spot size and the acceleration phase, and reducing the growth of transverse emittance by laser shaping. A nondestructive technique is also reported to measure the electron bunch length, by measuring the high-frequency spectrum of wakefield radiation which is caused by the passage of a relativistic electron bunch through a channel surrounded by a dielectric.

关 键 词：photocathode rf gun sub-picosecond electron bunch bunch length measurement wakefield radiation 

分 类 号：O462[理学—电子物理学]