Beam–beam effects and mitigation in a future proton–proton collider
文献类型：期刊论文
| ; | |
| 作者 | Wang, Li-Jiao; Sen, Tanaji; Tang, Jing-Yu ; Zhang, Lin-Hao
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| 刊名 | NUCLEAR SCIENCE AND TECHNIQUES
 ; NUCLEAR SCIENCE AND TECHNIQUES
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| 出版日期 | 2022 ; 2022 |
| 卷号 | 33期号:10页码:130 |
| 关键词 | Particle collider Particle collider Beam-beam effects Luminosity Tune footprint Dynamic aperture effect, beam-beam beam, width interaction, long-range current, wire current, electric beam, stability p p, scattering cavity, rotation crossing longitudinal transverse TeV electron positron CEPC quality hadron Beam-beam effects Luminosity Tune footprint Dynamic aperture effect, beam-beam beam, width interaction, long-range current, wire current, electric beam, stability p p, scattering cavity, rotation crossing longitudinal transverse TeV electron positron CEPC quality hadron |
| ISSN号 | 1001-8042 ; 1001-8042 |
| DOI | 10.1007/s41365-022-01112-z ; 10.1007/s41365-022-01112-z |
| 文献子类 | Article ; Article |
| 英文摘要 | The beam–beam effects in a hadron collider with an unprecedented energy scale were studied. These effects are strongly related to the attainable luminosity of the collider. Long-range interactions were identified as the major factor limiting the dynamic aperture, which is strongly dependent on the crossing angle, β*, and bunch population. Different mitigation methods of the beam–beam effects were addressed, with a focus on the compensation of long-range interactions by electric current wires. The CEPC-SPPC project is a two-stage large circular collider, with a first-stage circular electron–positron collider (CEPC) and a second-stage super proton–proton collider (SPPC). The design of the SPPC aims to achieve a center-of-mass energy of 75 TeV and peak luminosity of approximately 1 × 10$^{35}$ cm$^{−2}$ s$^{−1}$. We studied the beam–beam effects in the SPPC and tested the effectiveness of the mitigation methods. We found that with compensation using electric current wires, the dynamic aperture is at an acceptable level. Moreover, considering the significant emittance damping in this future proton–proton collider, the beam–beam effects and compensation are more complicated and are studied using long-term tracking. It was found that with a smaller emittance, the head-on interactions with a crossing angle become more prominent in reducing the beam stability, and combined head-on and long-range compensation is needed to improve the beam quality. When the reduction in population owing to burn-off was included, it was found that the coupling between the transverse and longitudinal planes at smaller emittance is the main driving source of the instabilities. Thus, crab cavities and emittance control are also necessary than just the compensation of the long-range interactions to improve the beam stability. This study serves as an example for studying the beam–beam effects in future proton–proton colliders.; The beam–beam effects in a hadron collider with an unprecedented energy scale were studied. These effects are strongly related to the attainable luminosity of the collider. Long-range interactions were identified as the major factor limiting the dynamic aperture, which is strongly dependent on the crossing angle, β*, and bunch population. Different mitigation methods of the beam–beam effects were addressed, with a focus on the compensation of long-range interactions by electric current wires. The CEPC-SPPC project is a two-stage large circular collider, with a first-stage circular electron–positron collider (CEPC) and a second-stage super proton–proton collider (SPPC). The design of the SPPC aims to achieve a center-of-mass energy of 75 TeV and peak luminosity of approximately 1 × 10$^{35}$ cm$^{−2}$ s$^{−1}$. We studied the beam–beam effects in the SPPC and tested the effectiveness of the mitigation methods. We found that with compensation using electric current wires, the dynamic aperture is at an acceptable level. Moreover, considering the significant emittance damping in this future proton–proton collider, the beam–beam effects and compensation are more complicated and are studied using long-term tracking. It was found that with a smaller emittance, the head-on interactions with a crossing angle become more prominent in reducing the beam stability, and combined head-on and long-range compensation is needed to improve the beam quality. When the reduction in population owing to burn-off was included, it was found that the coupling between the transverse and longitudinal planes at smaller emittance is the main driving source of the instabilities. Thus, crab cavities and emittance control are also necessary than just the compensation of the long-range interactions to improve the beam stability. This study serves as an example for studying the beam–beam effects in future proton–proton colliders. |
| 电子版国际标准刊号 | 2210-3147 ; 2210-3147 |
| 语种 | 英语 ; 英语 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/300052]  |
| 专题 | 高能物理研究所_东莞分部 高能物理研究所_加速器中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Li-Jiao,Sen, Tanaji,Tang, Jing-Yu,et al. Beam–beam effects and mitigation in a future proton–proton collider, Beam–beam effects and mitigation in a future proton–proton collider[J]. NUCLEAR SCIENCE AND TECHNIQUES, NUCLEAR SCIENCE AND TECHNIQUES,2022, 2022,33, 33(10):130, 130. |
| APA | Wang, Li-Jiao,Sen, Tanaji,Tang, Jing-Yu,&Zhang, Lin-Hao.(2022).Beam–beam effects and mitigation in a future proton–proton collider.NUCLEAR SCIENCE AND TECHNIQUES,33(10),130. |
| MLA | Wang, Li-Jiao,et al."Beam–beam effects and mitigation in a future proton–proton collider".NUCLEAR SCIENCE AND TECHNIQUES 33.10(2022):130. |
入库方式： OAI收割
来源：高能物理研究所
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