CSNS强流负氢离子源及其改进  

CSNS High Current H^- Ion Source and Its Improvement

作　　者：刘盛进[1,2] 欧阳华甫 黄涛[1,2] 肖永川 曹秀霞[1,2] 吕永佳 薛康佳[1,2] 陈卫东 LIU Shengjin;OUYANG Huafu;HUANG Tao;XIAO Yongchuan;CAO Xiuxia;LYU Yongjia;XUE Kangjia;CHEN Weidong(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Spallation Neutron Source Science Center,Dongguan 523803,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]散裂中子源科学中心,广东东莞523803

出　　处：《原子能科学技术》2019年第9期1719-1723,共5页Atomic Energy Science and Technology

基　　金：国家自然科学基金面上项目资助(11875271)

摘　　要：中国散裂中子源(CSNS)的离子源是1台强流负氢离子源,该离子源负氢束流的能量为50keV,负氢流强可达40mA,束流占空比最高为1.25%(重复频率为25Hz,脉宽为500μs)。目前该负氢离子源已投入到CSNS中使用。由于等离子体放电电极受带电粒子溅射的缘故,在1.5%(25Hz,600μs)的占空比、负氢流强30mA运行下,离子源的寿命约为30d。为提高离子源使用的稳定性,对离子源进行改进优化,提高了离子源的运行效率和稳定性。Chinese Spallation Neutron Source(CSNS)ion source is a type of high current H^-ion source.The H^-beam energy of this ion source is 50 keV,the H^-current intensity can reach 40 mA and the beam duty factor is up to 1.25%(the repetition frequency is 25 Hz,and the pulse width is 500μs).At present,this ion source is running at CSNS.During ion source operation,the surfaces of discharge electrodes are subjected to erosion due to particles bombarding.Therefore,the life time of this ion source is around 30 d at the 30 mA H^-current under the duty factor of 1.5%(25 Hz and 600μs).Some modifications were made.With these modifications,the operation efficiency and stability of ion source are enhanced.

关 键 词：中国散裂中子源 质子加速器 强流负氢离子源 

分 类 号：TL503.3[核科学技术—核技术及应用]