摘要
超导耦合螺线管磁体为μ介子离子化冷却实验装置(MICE)中的关键设备,其线圈内径1500mm,长度285mm,采用截面1.65mm×1.00mm的NbTi复合超导线,励磁到210A时,峰值磁场可达7.4T。在降温和励磁过程中,为减小导线窜动而导致失超,线圈绕制过程中需对导线和紧固带施加预应力。本文根据组合筒理论,得出了绕制过程中线圈和紧固带的预应力与冷质量内部应力分量的关系。采用有限元方法对线圈绕制、冷却和励磁3个连续过程进行动态仿真,分别分析了导线和紧固带绕制预应力的变化对冷质量内部各主要应力峰值的影响,得出线圈和紧固带绕制时满足磁体稳定性和结构安全的预应力优化结果,为MICE超导耦合磁体的研制及其他类似大直径、多层的超导螺线管磁体绕制提供理论依据。
The superconducting solenoid magnet is one of the key equipment in the muon ionization cooling experiment （MICE）.The coil has an inner diameter of 1 500 mm,length of 285 mm,and is made from copper matrix NbTi conductors with the insulated cross area of 1.65 mm×1.00 mm.The peak magnetic field is up to 7.4 T at a full current of 210 A.In order to reduce mechanical motion of conductors and avoid magnet quench during cooling and charging,the pre-stress is applied to conductor and banding during coil winding process.To solve the confirmation problem of winding pre-stress,the relationship between pre-stress and stress components in cold mass assembly was proposed according to composed cylinder theory.By dynamic simulation of whole processes including winding,cooling and charging by finite element model,the analyses on the stress in cold mass assembly with different pre-stresses on conductor and banding were carried out,and the optimized results of winding pre-stresses for winding the MICE coupling magnet were got.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2010年第5期611-616,共6页
Atomic Energy Science and Technology
基金
哈尔滨工业大学"985-2期"低温与超导工程技术创新平台基金资助项目
美国能源部资助项目(DE-AC02-05CH11231)
关键词
MICE超导螺线管磁体
预应力
有限元
应力分析
MICE superconducting solenoid magnet
pre-stress
finite element
stress analysis
作者简介
潘衡（1982-），男，河北衡水人，博士研究生，制冷与低温工程专业
