A particle-in-cell mode beam dynamics simulation of medium energy beam transport for the SSC-Linac  

作　　者：肖陈 何源 原有进 陆元荣 刘勇 王志军 杜小楠 姚庆高 刘戈 徐孟鑫 贺守波 夏佳文 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences [3]Key Laboratory of Heavy Ion Physics Ministry of Education,Peking University [4]School of Nuclear Science and Technology,Lanzhou University

出　　处：《Chinese Physics C》2012年第1期84-90,共7页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10635090)

摘　　要：A new linear accelerator system,called the SSC-Linac injector,is being designed at HIRFL （the heavy ion research facility of Lanzhou）.As part of the SSC-Linac,the medium energy beam transport （MEBT） consists of seven magnetic quadrupoles,a re-buncher and a diagnose box.The total length of this segment is about 1.75 m.The beam dynamics simulation in MEBT has been studied using the TRACK 3D particle-in-cell code,and the simulation result shows that the beam accelerated from the radio frequency quadrupole （RFQ） matches well with the acceptance of the following drift tube linac （DTL） in both the transverse and longitudinal phase spaces,and that most of the particles can be captured by the final sector focusing cyclotron for further acceleration.The longitudinal emittance of the RFQ and the longitudinal acceptance of the DTL was calculated in detail,and a multi-particle beam dynamics simulation from the ion source to the end of the DTL was done to verify the original design.A new linear accelerator system,called the SSC-Linac injector,is being designed at HIRFL （the heavy ion research facility of Lanzhou）.As part of the SSC-Linac,the medium energy beam transport （MEBT） consists of seven magnetic quadrupoles,a re-buncher and a diagnose box.The total length of this segment is about 1.75 m.The beam dynamics simulation in MEBT has been studied using the TRACK 3D particle-in-cell code,and the simulation result shows that the beam accelerated from the radio frequency quadrupole （RFQ） matches well with the acceptance of the following drift tube linac （DTL） in both the transverse and longitudinal phase spaces,and that most of the particles can be captured by the final sector focusing cyclotron for further acceleration.The longitudinal emittance of the RFQ and the longitudinal acceptance of the DTL was calculated in detail,and a multi-particle beam dynamics simulation from the ion source to the end of the DTL was done to verify the original design.

关 键 词：SSC-Linac MEBT PIC mode ACCEPTANCE re-buncher 

分 类 号：TL501.5[核科学技术—核技术及应用]