中国散裂中子源加速器前端运行及改进  

The Operation and Improvement of CSNS Front End

作　　者：欧阳华甫[1] 刘盛进[1] 肖永川[1] 吕永佳[1] 曹秀霞[1] 薛康佳[1] 李辉 朱仁丽 陈卫东 OUYANG Hua-fu;LIU Sheng-jin;XIAO Yong-chuan;LV Yong-jia;CAO Xiu-xia;XUE Kang-jia;LI Hui;ZHU Ren-li;CHEN Wei-dong(Dongguan Department,Institute of High Energy Physics,CAS,Dongguan 523803,China)

机构地区：[1]中国科学院高能物理研究所东莞分部,广东东莞523803

出　　处：《白城师范学院学报》2021年第2期1-11,17,共12页Journal of Baicheng Normal University

基　　金：国家自然科学基金项目“强流脉冲负氢离子源高占空比的性能研究”(11875271).

摘　　要：2020年2月,中国散裂中子源打靶束流功率达到100 kW,提前一年半实现一期设计指标.从此,中国散裂中子源开始在该功率下日常运行,对用户开放.截至目前,中国散裂中子源的运行效率在93%左右,高于国际同类散裂中子源的同期水平.直线加速器前端系统作为中国散裂中子源加速器的起点,提供散裂中子源所需要的束流,是中国散裂中子源的重要和关键组成部分,前端系统能否稳定运行决定了散裂中子源的运行效率.文章主要介绍前端系统最近几年的运行,及为解决离子源的稳定性和RFQ的打火问题所进行的改进.China spallation neutron source(CSNS)reached its designed 100 kW target beam power goal in February,2020,which is one and half year in advance of its plan.Since then,CSNS began its routine operation with 100 kW target beam power and opened to the users.Up to now,the operation efficiency of CSNS is about 93%,which is higher than that of the same kind of neutron sources in the corresponding period.The front end of linac,as the start of the CSNS accelerator and the beam provider of CSNS,is the key and important part of CSNS.Whether the front end runs stably or not would decide how the efficiency of CSNS operation does.In this paper,main attention is focused on the introduction of CSNS operation and the improvements have been made for the front end to solve the problems of ion source instability and the Radio Frequncy Quadrupole(RFQ)sparking in the past several years.

关 键 词：中国散裂中子源 前端系统 负氢离子源 低能传输线 预切束器 RFQ 打火 

分 类 号：O571.53[理学—粒子物理与原子核物理]