Evaluation of radiative depolarization in the future circular electron-positron collider [article]

Wenhao Xia, Zhe Duan, Yiwei Wang, Bin Wang, Jie Gao
2022 arXiv   pre-print
Polarized lepton beams are an important design aspect of the future 100 km-scale Circular Electron-Positron Collider (CEPC). Precision beam energy calibration using resonant depolarization, as well as longitudinally polarized colliding beams are being actively investigated. The achievable beam polarization level for different beam energies and application scenarios depend on the radiative depolarization in the collider rings. In this paper the radiative depolarization effects are evaluated for
more » ... the CEPC collider ring lattice with detailed machine imperfections and corrections. Simulations with the SLIM and Monte-Carlo approaches using the BMAD/PTC codes are compared with the theory of spin diffusion effects for ultra-high beam energies.
arXiv:2204.12718v1 fatcat:yhanxicacjahpkozumrntu22ja