Velocity bunching in travelling wave accelerator with low acceleration gradient  

作　　者：黄瑞萱 何志刚 李伟伟 贾启卡 

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

出　　处：《Chinese Physics C》2014年第5期98-102,共5页中国物理C（英文版）

基　　金：Supported by National Natural Sciences Foundation of China(11205152,11375199);Fundamental Research Funds for the Central Universities(WK2310000042);Major State Basic Research Development Program of China(2011CB808301)

摘　　要：We present the analytical and simulated results of our study of the influence of the acceleration gradient in the velocity bunching process, which is a bunch compression scheme that uses a travelling wave accelerating structure as a compressor. Our study shows that the bunch compression application with low acceleration gradient is more tolerant to phase jitter and more successful in obtaining a compressed electron beam with symmetrical longitudinal distribution and low energy spread. We also present a transverse emittance compensation scheme to compensate the emittance growth caused by the increase of the space charge force in the compressing process, which is easy to adjust for different compression factors.We present the analytical and simulated results of our study of the influence of the acceleration gradient in the velocity bunching process, which is a bunch compression scheme that uses a travelling wave accelerating structure as a compressor. Our study shows that the bunch compression application with low acceleration gradient is more tolerant to phase jitter and more successful in obtaining a compressed electron beam with symmetrical longitudinal distribution and low energy spread. We also present a transverse emittance compensation scheme to compensate the emittance growth caused by the increase of the space charge force in the compressing process, which is easy to adjust for different compression factors.

关 键 词：travelling wave accelerating structure velocity bunching acceleration gradient emittance compensation 

分 类 号：O572.211[理学—粒子物理与原子核物理]