摘要
为增加传输通过加速管的束流强度,提高中子发生器的中子产额,采用Particle-in-cell(PIC)程序模拟研究了入射束强度在10~150mA范围内,不同初始参数条件下D+1束在加速管中的传输状态。结果表明,当入射束在加速管入口处的归一化发射度取0.25πcm·mrad,Courant-Snyder参数α=-4、β=60cm/rad时,50~100mA D+1束与加速管匹配良好。根据匹配参数,对双等离子体离子源的引出系统进行了优化,结果显示,在引出系统与加速管之间放置两个螺线管透镜和1个光阑,能有效去除D+2、D+3离子,实现100mA D+1束顺利传输通过加速管的目的。
In order to increase the intensity of the deuterium beam passing through the accelerating column,and the neutron yield of the neutron generator as well,the Particle-in-cell simulation was used to study the beam transmission in the accelerating column,in which the initial parameters of the deuterium beam were different and the intensities of the deuterium beam were 10-150 mA.The results show that when the normalized emittance of the incident beam at the entrance of the accelerating column is0.25πcm·mrad and the Courant-Snyder parameterα=-4,β=60 cm/rad,the deuterium beam of 50-100 mA will match the accelerating column.According to the deuteriumbeam matching parameters,the extraction system of the duoplasmatron ion source was optimized.The results show that by means of placing two solenoid lenses and an aperture between the extraction system and the accelerating column,D＋1 beam of 100 mA can be transmitted smoothly through the accelerating column and the unwanted ions D＋2 and D＋3 can be eliminated effectively.
作者
卢小龙
马占文
黄智武
张双佼
王俊润
韦峥
张宇
姚泽恩
LU Xiaolong;MA Zhanwen;HUANG Zhiwu;ZHANG Shuangjiao;WANG Junrun;WEI Zheng;ZHANG Yu;YAO Zeen(School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China;Engineering Research Center for Neutron Application,Ministry of Education Lanzhou University,Lanzhou 730000,China)
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2018年第8期1519-1525,共7页
Atomic Energy Science and Technology
基金
中央高校基本科研业务费专项资金资助项目(lzujbky-2017-93
lzujbky-2017-kb09)
