FECR超导离子源Nb3Sn磁体半长度样机的结构分析  

Mechanical Design of the Half-length Prototype for a Superconducting FECR Ion Source

作　　者：朱丽[1,2] 吴巍[2] 孙良亭[2] 俞树荣[1] 陈玉泉[2] 吴北民[2] 梅恩铭[2] 辛灿杰 关明智 Zhu Li;Wu Wei;Sun Liangting;Yu Shurong;Chen Yuquan;Wu Beimin;Mei Enming;Xin Canjie;Guan Mingzhi(Lanzhou University of Technology,Lanzhou 730050,China;Institute of Modem Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]兰州理工大学,甘肃兰州730050 [2]中国科学院近代物理研究所,甘肃兰州730000

出　　处：《稀有金属材料与工程》2020年第9期3177-3181,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金国家重大科研仪器设备研制项目(11427904);国家自然科学基金面上项目(11575266)。

摘　　要：中国科学院近代物理研究所正在研制运行于45 GHz的世界首台第4代电子回旋共振离子源(fourth electron cyclotron resonance,FECR)。该离子源磁体线圈全部采用Nb3Sn(铌三锡)超导材料制作,这一超导材料临界性能对应力敏感,加之磁体中六极线圈和螺线管线圈之间的应力不平衡分布,导致磁铁机械结构设计面临极大挑战。为了验证离子源磁铁结构设计的合理性和仿真结果的可信性,为全尺寸真机的研制奠定技术基础,设计了能够一定程度上反映离子源磁体机械结构的半长度样机。主要介绍了FECR半长度样机的三维机械结构分析,借助ANSYS有限元软件分析了磁铁在室温组装、冷却降温和加电励磁时的应力分布和变化情况,为磁体装配提供预应力参考。The new Nb3 Sn superconducting magnet system for the fourth-generation 45 GHz ECR source(FECR)is under developing in the Institute of Modern Physics(IMP).Because the magnet is made from Nb3 Sn which is sensitive to the strain and there are strong Lorentz forces between the solenoids and sextupole coils,the mechanical structure design is a big challenge.In order to verify the reasonability and feasibility of the structure design and its simulation results,a half-length prototype of the FECR magnet was developed.This paper presented the detailed design of the magnet structure.The stress distribution and variation of the prototype during assembly,cooling down and charging have been got with the three-dimensional finite-element model and are presented in the paper.The results will be used as reference of the room-temperature magnet assembly.

关 键 词：FECR离子源 NB3SN 六极线圈 螺线管 ANSYS 应力 

分 类 号：TH142.8[一般工业技术—材料科学与工程]