Particle-in-cell mode beam dynamics simulation of the low energy beam transport for the SSC-linac injector  

作　　者：XIAO Chen HE Yuan YUAN You-Jin YAO Qing-Gao WANG Zhi-Jun CHANG Wei LIU Yong XIA Jia-Wen 

机构地区：[1]Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]The School of Nuclear Science and Technology Lanzhou University, Lanzhou 730000, China

出　　处：《Chinese Physics C》2011年第5期500-504,共5页中国物理C（英文版）

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

摘　　要：A new SSC-linac system （injector into separated sector cyclotron） is being designed in the HIRFL （heavy ion research facility of Lanzhou）. As part of SSC-Linac, the LEBT （low energy beam transport） consists of seven solenoids, four quadrupoles, a bending magnet and an extra multi-harmonic buncher. The total length of this segment is about 7 meters. The beam dynamics in this LEBT has been studied using three-dimensional PIC （particle-in-cell） code BEAMPATH. The simulation results show that the continuous beam from the ion source is first well analyzed by a charge-to-mass selection system, and the beam of the selected charge-to-mass ratio is then efficiently pre-bunched by a multi-harmonic buncher and optimally matched into the RFQ （radio frequency quadrupole） for further acceleration. The principles and effects of the solenoid collimation channel are discussed, and it could limit the beam emittance by changing the aperture size.A new SSC-linac system （injector into separated sector cyclotron） is being designed in the HIRFL （heavy ion research facility of Lanzhou）. As part of SSC-Linac, the LEBT （low energy beam transport） consists of seven solenoids, four quadrupoles, a bending magnet and an extra multi-harmonic buncher. The total length of this segment is about 7 meters. The beam dynamics in this LEBT has been studied using three-dimensional PIC （particle-in-cell） code BEAMPATH. The simulation results show that the continuous beam from the ion source is first well analyzed by a charge-to-mass selection system, and the beam of the selected charge-to-mass ratio is then efficiently pre-bunched by a multi-harmonic buncher and optimally matched into the RFQ （radio frequency quadrupole） for further acceleration. The principles and effects of the solenoid collimation channel are discussed, and it could limit the beam emittance by changing the aperture size.

关 键 词：SSC-linac LEBT PIC mode optimal injection COLLIMATION 

分 类 号：TL53[核科学技术—核技术及应用] TL501.5