SPPC注入器链中SS环Lattice的初步研究

SPPC项目对对撞机和高能物理发展有重大意义.作为SPPC注入器链的末端，SS环将质子能量从180 GeV加速到2.1 TeV，其性能与SPPC束流品质密切相关.为此初步探究了可用于SS环的Lattice结构.首先，讨论了SPPC整体设计需求对SS环填充模式的要求.在此基础上，使用了MADX程序，设计了两种Lattice结构：SSH和SSV，分别用于水平和垂直方向在快轴引出.分析得到SSH和SSV的横向闭轨偏离分别小于0.432 mm和0.337mm.目前得到的Lattice结构可以作为下一步研究工作的基础.
Abstract：SPPC is of great significance to collider and the development of high-energy physics. As the last part of the injector chain, SS ring boosts the proton energy from 180 GeV to 2.1 TeV, and its performance is closely related to the beam quality of SPPC. The preliminary lattice study of the SS ring was focused on. Firstly, the filling pattern of SS ring was discussed based on the requirements of SPPC. Then, with MADX, two dedicated lattices, SSH and SSV, which were designed for fast longitudinal extraction scheme in horizontal and vertical directions were given in detail. The horizontal closed orbit deviations of SSH and SSV are smaller than 0.432 mm and 0.337 mm, respectively. The two lattices can provide a foundation for future research.