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

被引：0

作者：

Xia, Wenhao ^{[1
,2
,3
]}

Duan, Zhe ^{[1
]}

Barber, Desmond P. ^{[4
,5
]}

Wang, Yiwei ^{[1
]}

Wang, Bin ^{[1
]}

Gao, Jie ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Accelerat Phys & Technol, 19B Yuquan Rd, Beijing 10049, Peoples R China

[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 10049, Peoples R China

[3] State Key Lab NBC Protect Civilians, Beijing 102205, Peoples R China

[4] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[5] Univ New Mexico, Dept Math & Stat, Albuquerque, NM 87131 USA

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2023年 / 26卷 / 09期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

ENERGY STORAGE-RINGS; SPIN POLARIZATION; BEAM POLARIZATION; SIMULATION;

D O I：

10.1103/PhysRevAccelBeams.26.091001

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Spin-polarized lepton beams are an important aspect in the design 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, is being actively investigated. The attainable beam polarization level for various beam energies and application scenarios depends on the radiative depolarization in the collider rings. In this paper, the radiative depolarization effects are evaluated for a 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 the effects of spin diffusion for ultrahigh beam energies and the validity of the theories, with special attention to that of so-called uncorrelated resonance crossing, is thereby addressed.

引用

页数：27

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