120 keV正离子源加速器绝缘支撑系统设计  

Design of insulation support system for 120 keV positive ion source accelerator

作　　者：邓文 谢亚红 顾玉明 江云飞 刘龙斌 王昉 胡纯栋 Deng Wen;Xie Yahong;Gu Yuming;Jiang Yunfei;Liu Longbin;Wang Fang;Hu Chundong(Scinece Island Branch,Graduate School,University of Science and Technology of China,Hefei 230026,China;Institute of Plasma Physics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China;Institutes of Physical Science and Infomation Technology,Anhui University,Hefei 230601,China)

机构地区：[1]中国科学技术大学研究生院科学岛分院,合肥230026 [2]中国科学院合肥物质科学研究院等离子体物理研究所,合肥230031 [3]东华理工大学核科学与工程学院,南昌330013 [4]安徽大学物质科学与信息技术研究院,合肥230601

出　　处：《强激光与粒子束》2025年第4期64-72,共9页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11975261)。

摘　　要：针对120 keV正离子源,设计了加速器的绝缘支撑系统,确定了绝缘体与支撑法兰的连接方式及相关参数,并通过有限元分析的方法,针对电场集中和连接支撑的问题,开展了绝缘支撑系统的优化设计。分别对绝缘体和电极进行静电模拟,确定了绝缘体的材料及结构参数,研究了加速器的绝缘性能。研究表明各绝缘体周围最大电场值低于4 kV/mm,电极间最大电场值约为14 kV/mm,满足120 keV正离子源加速器耐压要求。其次考虑离子源的垂直安装,在离子源重力作用下EG支撑法兰和绝缘体的连接螺栓要承受很大的正应力和剪应力,开展了加速器的机械性能研究。经过力学分析,螺栓最大正应力为26.336 MPa,剪切力为1.292 MPa。经过模拟分析,螺栓最大正应力为25.867 MPa,与理论解相差1.78%,小于材料的抗拉强度;最大剪切力为1.295 MPa,与理论解相差0.23%,小于材料的抗剪强度。研究结果表明120 keV正离子源加速器机械性能满足设计要求。For the 120 keV positive ion source,the insulation support system for the accelerator was designed,and the connection mode and basic parameters of the insulators and support flanges were determined.The optimization design of the insulation support system was studied through the finite element analysis method for the problems of electric field concentration and connection support.The electrostatic simulations of insulators and grid plates were carried out to determine the material and structural parameters of insulators,so as to study the insulating properties of the accelerator.The study shows that the maximum electric field around each insulator is less than 4 kV/mm,and the maximum electric field between grids is about 14 kV/mm,which can meet the voltage withstand requirements of120 keV positive ion source accelerator.Secondly,considering the vertical installation of ion source,the connecting bolts of EG support flange and insulator would bear great normal stress and shear stress under the action of ion source gravity,thus the mechanical properties of the accelerator were studied.After mechanical analysis,the maximum normal stress of the bolt is 26.336 MPa,and the shear force is 1.292 MPa.The maximum normal stress of the bolt in the finite element analysis is 25.867 MPa,which is 1.78%different from the theoretical solution and less than the tensile strength of the material.The maximum shear force is 1.295 MPa,which is 0.23%different from the theoretical solution and less than the shear strength of the material.The results show that the mechanical properties of the120 keV positive ion source accelerator meet the design requirements.

关 键 词：正离子源 加速器 绝缘支撑系统 有限元分析 绝缘性能 机械性能 

分 类 号：TL629.1[核科学技术—核技术及应用]