大孔径背景场磁体的设计与分析

基于中国聚变工程实验堆(CFETR)接头的设计要求,提供了一种大孔径背景场磁体的设计方案。构造出大孔径背景场磁体的结构,利用背景场磁体来得到相应的磁场数据,对比研究磁体的参数对磁场的影响,得出相关参数的变化规律。利用Gandalf程序模拟计算出CFETR接头背景场磁体的分流温度,考虑到液氦的流体力学性能,采用Gandalf程序模拟超导股线的失超行为,估算出较为精确的最小失超能。将最小失超能作为Q0值代入到程序中得出热斑温度值,分析结果表明,设计符合要求,为CFETR高温超导接头的制作和实验提供了可靠依据。

Design and analysis of large aperture background field magnets

A design scheme of large aperture field magnet is provided based on the design requirements of the China Fusion Engineering Testing Reactor (CFETR) joints. Using the background field magnet to get the corresponding magnetic field data, the influence of the magnet parameter on the magnetic field is compared, and the corresponding magnetic field data are obtained. Gandalf program was used to simulate the shunt temperature of CFETR field magnet under operating conditions. Considering the hydrodynamic performance of liquid helium, Gandalf program was used to simulate the quench behavior of superconducting strands and to estimate the more accurate minimum quenching energy. The minimum quench value can be used as the Q₀ value inputted into the program to obtain hot spot temperature value. The analysis shows that the design meets the requirements for the production of high temperature superconducting magnets and provide reliable basis for manufacture and experiments.