RFQ冷却聚束器束流冷却后的性质模拟  

Property of Cooled Beam in RFQ Cooler and Buncher

作　　者：朱志超[1,2] 黄文学[2] 罗文[1] 周青芝[1] 宋英明[1] 王玥[2] 田玉林[2] 王均英[2] 孙宇梁[2] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《原子能科学技术》2014年第8期1508-1515,共8页Atomic Energy Science and Technology

基　　金：国家自然科学基金资助项目(10627504;11075188;11247215);国家重点基础研究发展计划资助项目(2007CB815000);湖南省自然科学基金资助项目(13JJ4073;13JJ4074);南华大学博士科研启动基金资助项目(2012XQD06);核技术及应用湖南省重点学科基金资助项目

摘　　要：介绍了RFQ冷却聚束器的基本工作原理和束流在其中被约束和冷却的过程。采用真实相互作用势(RIP)模型进行蒙特卡罗模拟,得出束流在RFQ冷却聚束器中完全冷却后的性质。结果表明:束流冷却后的束斑和能量分散随时间一直保持平衡;束流冷却后束斑和能量分散不随缓冲气体气压、入射离子能量的变化而变化;冷却后束斑半径与射频(RF)四极电场频率呈反比,而冷却后束流的能量分散仅与温度有关。T he basic principle of the RFQ cooler and buncher ,and the constrained and cooled process of the beam were introduced in this paper .By using realistic interaction potential （RIP） model to make Monte Carlo simulation ,the property of the cooled beam was calculated .The beam spot and the energy dispersion of completely cooled beam keep almost constant with time ,and do not vary with the buffer gas pressure and the initial ion energy .T he radius of cooled beam is inversely proportional to the RF frequency of the electric field ,and the energy dispersion is only related with the temperature .

关 键 词：RFQ 冷却 相空间 蒙特卡罗 

分 类 号：O571.6[理学—粒子物理与原子核物理]