Kicker magnet design of HIRFL-CSRm

Abstract

介绍了兰州重离子加速器冷却储存环(HIRFL-CSR)CSRm引出kicker磁铁的物理设计、参数计算以及结构设计和加工。为了减小电感,使上升时间达到要求,CSRm引出kicker磁铁采用分布式的传输线方案,同时将无感电容与磁铁并联以满足匹配的问题。磁铁用单匝线圈和铁氧体铁芯来降低电感、减少涡流损耗,并采取两台电源成对供电、导体一端共地的结构形式消除杂散电感和轴向场,这种方式不但消除了过桥的不利影响,而且可通过调节导体间距离方便的调节磁场均匀区宽度和磁铁电感。完成设计后磁铁电感小于1&mu;H,在140 mm范围内磁场均匀度好于&plusmn;0.5%,最高磁场达到0.038 T,最大峰值激磁电流约为2.5 kA。<span style="color: rgb(51, 51, 51); font-family: arial, helvetica, sans-serif; font-size: 13px; line-height: 22px; background-color: rgb(248, 248, 248);">The theoretic design, 2-D magnetic field calculation and the electrical calculation of a kicker magnet for CSRm extraction are described as well as the construction design and the manufacture of some key parts. In order to decrease the additional inductance of the magnet, a one-turn coil and ferrite cores are used in the magnet. Each pair of the magnets are powered by a pair of pulse power supplies. The designed inductance is less than 1 muH and the field homogeneity is better than +or-0.5% at the peak value of 0.038 T. The magnet meets all of the strict requirements.</span