Evaluation of radiative depolarization in the future circular electron-positron collider
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 attainabl...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-09-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.26.091001 |
| _version_ | 1797688073987817472 |
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| author | Wenhao Xia Zhe Duan Desmond P. Barber Yiwei Wang Bin Wang Jie Gao |
| author_facet | Wenhao Xia Zhe Duan Desmond P. Barber Yiwei Wang Bin Wang Jie Gao |
| author_sort | Wenhao Xia |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-12T01:26:16Z |
| format | Article |
| id | doaj.art-6d02bfe3297c4916a31cb1e3b0ada0f4 |
| institution | Directory Open Access Journal |
| issn | 2469-9888 |
| language | English |
| last_indexed | 2024-03-12T01:26:16Z |
| publishDate | 2023-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Accelerators and Beams |
| spelling | doaj.art-6d02bfe3297c4916a31cb1e3b0ada0f42023-09-12T15:49:54ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882023-09-0126909100110.1103/PhysRevAccelBeams.26.091001Evaluation of radiative depolarization in the future circular electron-positron colliderWenhao XiaZhe DuanDesmond P. BarberYiwei WangBin WangJie GaoSpin-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.http://doi.org/10.1103/PhysRevAccelBeams.26.091001 |
| spellingShingle | Wenhao Xia Zhe Duan Desmond P. Barber Yiwei Wang Bin Wang Jie Gao Evaluation of radiative depolarization in the future circular electron-positron collider Physical Review Accelerators and Beams |
| title | Evaluation of radiative depolarization in the future circular electron-positron collider |
| title_full | Evaluation of radiative depolarization in the future circular electron-positron collider |
| title_fullStr | Evaluation of radiative depolarization in the future circular electron-positron collider |
| title_full_unstemmed | Evaluation of radiative depolarization in the future circular electron-positron collider |
| title_short | Evaluation of radiative depolarization in the future circular electron-positron collider |
| title_sort | evaluation of radiative depolarization in the future circular electron positron collider |
| url | http://doi.org/10.1103/PhysRevAccelBeams.26.091001 |
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