论文标题
调查Z极CEPC中的自旋旋转器
Investigation of spin rotators in CEPC at the Z-pole
论文作者
论文摘要
纵向极化是未来100公里尺度的圆形电子位置对撞机（CEPC）的重要设计方面。在CEPC撞机环中需要自旋旋转器，以使沿相互作用点（IPS）的纵向方向的光束极化。本文重点介绍了在Z-Pole（45.6 GEV）的CEPC的自旋旋转器的设计。 CEPC在Z极点的设计是基于电磁磁铁和水平弯曲磁体截面的设计。螺线管引入的横向运动的耦合由四极透镜补偿。已经对布局进行了调整，以将自旋旋转器实现到对撞机环中。可以在IPS上使用自旋旋转器在IPS上实现较长的偏光梁。高度极化是可以实现的，而自旋旋转器对轨道运动的影响是可以接受的。将介绍详细的仿真结果。基于螺线管的自旋旋转器配置设计并集成到CEPC撞机环晶格中。根据模拟结果，可以满足两极分化的要求。
Longitudinal polarization is an important design aspect of the future 100 km-scale Circular Electron Position Collider (CEPC). Spin rotators are needed in CEPC collider rings to make the beam polarization along the longitudinal direction at the interaction points (IPs). This paper focuses on the design of spin rotators for CEPC at Z-pole (45.6 GeV). The design of spin rotators in CEPC at Z-pole is based on solenoid magnets and horizontal bending magnets sections. The coupling of transverse motion introduced by solenoids is compensated with quadrupole lenses. Adjustments have been made to the layout to implement the spin rotators into the collider rings.Longitudinal polarized beam can be achieved at the IPs with the spin rotators. High degree of polarization is attainable, while the effect of spin rotators on orbital motion is acceptable. The detailed simulation results will be presented.A solenoid-based spin rotator configuration is designed and integrated into the CEPC collider ring lattice. According to the simulation results, the polarization requirements can be satisfied.
