中文摘要：

有大接受的一个新奇表面 muon 俘获系统基于中国分裂中子来源(CSNS ) 被建议。这个系统用一个长石墨目标被放在它内的一根超导的螺线管被设计。第一，旋转极化进化在一个经常的一致磁场被学习。当磁场能与表面 muon 的旋转交往，旋转极化和表面 muons 的生产率由新俘获系统收集了被 G4beamline 计算。模拟结果证明表面 muons 能仍然保留高旋转极化(>90%) 与不同磁场(0-10 T ) ，并且磁场越大， muons 越表面能被捕获。最后，不同横梁部分的表面 muons 的质子阶段空格， Courant-Snyder 参数，和紧张与 0 和 5 T 的磁场被给。螺线管俘获系统能集中质子和表面 muon 横梁并且收集 \(\pi ^{\pm }\) 并且 \(\mu ^{\pm }\) 粒子。它能也提供强烈精力充沛的正电子来源。

英文摘要：

A novel surface muon capture system with a large acceptance was proposed based on the China spal- lation neutron source （CSNS）. This system was designed using a superconducting solenoid where a long graphite target was put inside it. Firstly, the spin polarization evo- lution was studied in a constant uniform magnetic field. As the magnetic field can interact with the spin of the surface muon, both the spin polarization and production rate of the surface muons collected by the new capture system were calculated by the G4beamline. Simulation results showed that the surface muons could still keep a high spin polar- ization （〉90%） with different magnetic fields （0-10 T）, and the larger magnetic field is, the more surface muons can be captured. Finally, the proton phase space, Courant-Snyder parameters, and intensities of surface muons of different beam fractions were given with magnetic fields of 0 and 5 T. The solenoid capture system can focus proton andsurface muon beams and collect π± and μ± particles. It can also provide an intense energetic positron source.