Nb_3Sn卢瑟福电缆复合导体稳定性分析  

Stability Analysis of Nb_3Sn Rutherford Cable-in-Channel

作　　者：张雍良 武玉[1] 戴超 吴凯宏[1,2] ZHANG Yongliang;WU Yu;DAI Chao;WU Kaihong(Institute of Plasma Physics, Chinese Academy of Sciences, Heifei 230031;University of Science and Technology of China, Heifei 230026)

机构地区：[1]中国科学院等离子体物理研究所,合肥230031 [2]中国科学技术大学,合肥230026

出　　处：《低温物理学报》2019年第1期33-37,共5页Low Temperature Physical Letters

基　　金：中国科学院战略性先导科技专项(专项编号:XDB25000000)资助的课题

摘　　要：超高磁场全身核磁共振成像仪能显著提高信噪比和空间分辨率,有助于对病人的诊断.超导磁体是超高磁场核磁共振成像仪的基础,而导体是超导磁体设备研制的关键技术之一.设计了一种基于Nb_3Sn超导线的复合导体,本文对设计的复合导体建立一维失超传播模型,并对导体的失超传播特性进行了分析.分析结果表明:导体的最小失超能与扰动范围、扰动时长和运行电流有关;扰动能量越大,失超传播速度越快;运行电流越大,失超传播速度越快.The ultra-high magnetic field whole-body nuclear magnetic resonance imaging (MRI) instrument can significantly improve the signal-to-noise ratio and spatial resolution, and is helpful for the diagnosis of the patient. Superconducting magnets are the basis of the MRI facilities,the conductor is one of the key to development of the magnet. A composite conductor based on Nb3Sn superconducting wire was designed. In this paper, a one-dimensional quench model is established for the designed composite conductor, and the quench propagation characteristics of the composite conductor are investigated. The results showed that the minimum quench energy of conductor is related to the disturbance range, disturbance duration and operating current;the higher the perturbation energy, the faster of quench propagation velocity;the higher the operating current, the faster the propagation spend.

关 键 词：核磁共振 复合导体 稳定性 

分 类 号：TM26[一般工业技术—材料科学与工程]