【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.更多还原

【Abstract】 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.更多还原