三块弯铁消色散磁聚焦结构最小发射度  

Minimum emittance of three-bend achromats

作　　者：李啸宇[1,2] 徐刚[2] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院高能物理研究所,北京100049

出　　处：《强激光与粒子束》2012年第8期1947-1950,共4页High Power Laser and Particle Beams

摘　　要：通过采用二极铁之间色散函数的相空间匹配所带来的约束条件,从而无需依赖具体的磁聚焦结构,利用Mathematica软件进行计算,得到了在三块二极铁弯转半径相等情况下,两种应用普遍的三块弯铁消色散(TBA)磁聚焦结构的最小发射度所对应的最小结构比例参数。得到了在TBA结构三块二极铁长度及弯转半径任意的情况下,TBA结构能取得的最小结构比例参数,以及TBA结构中三块二极铁长度及弯转半径所要满足的关系。由于计算中无需考虑具体的磁聚焦结构,得到的理论结果及其分析过程具有较强的通用性。The calculation of the minimum emittance of three-bend achromats（TBAs） made by Mathematica software can ignore the actual magnets lattice in the matching condition of dispersion function in phase space.The minimum scaling factors of two kinds of widely used TBA lattices are obtained.Then the relationship between the lengths and the radii of the three dipoles in TBA is obtained and so is the minimum scaling factor,when the TBA lattice achieves its minimum emittance.The procedure of analysis and the results can be widely used in achromats lattices,because the calculation is not restricted by the actual lattice.

关 键 词：最小发射度 磁聚焦结构 储存环 同步辐射光源 

分 类 号：TL503.1[核科学技术—核技术及应用]