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

Xia, Wenhao; Duan, Zhe; Barber, Desmond P.; Wang, Yiwei; Wang, Bin; Gao, Jie

doi:10.1103/physrevaccelbeams.26.091001

Phys. Rev. Accel. Beams

2023

DOI: 10.1103/physrevaccelbeams.26.091001

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

Wenhao Xia,

Zhe Duan,

Desmond P. Barber

et al.

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Investigation of spin rotators in CEPC at the Z-pole

Xia

Duan

Gao

et al. 2022

Radiat Detect Technol Methods

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Purpose Longitudinal polarization is an important design aspect of the future 100 km-scale Circular Electron Position Collider (CEPC). Spin rotators are needed in the 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 the Z-pole (45.6 GeV). Methods The design of spin rotators in the CEPC at the 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. Results 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. Conclusion 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.

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Investigation of spin rotators in CEPC at the Z-pole

Xia

Duan

Gao

et al. 2022

Radiat Detect Technol Methods

View full text Add to dashboard Cite

show abstract

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

Cited by 1 publication

References 42 publications

Investigation of spin rotators in CEPC at the Z-pole

Investigation of spin rotators in CEPC at the Z-pole

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