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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | https://arxiv.org/abs/2506.21289 |
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| _version_ | 1866911024418914304 |
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| author | Xu, Derong Berg, J Scott Blaskiewicz, Michael M Hao, Yue Luo, Yun Montag, Christoph Nagaitsev, Sergei Podobedov, Boris Ptitsyn, Vadim Willeke, Ferdinand Xiao, Binping |
| author_facet | Xu, Derong Berg, J Scott Blaskiewicz, Michael M Hao, Yue Luo, Yun Montag, Christoph Nagaitsev, Sergei Podobedov, Boris Ptitsyn, Vadim Willeke, Ferdinand Xiao, Binping |
| contents | Flat hadron beam collisions, though expected to enhance peak luminosity by about an order of magnitude, have not yet been demonstrated. Our study reveals a critical limitation: realistic fluctuations, when amplified by synchro-betatron resonance, lead to transverse emittance transfer in flat-beam collisions. Using beam-beam simulations based on Electron-Ion Collider design parameters, we show that this effect leads to vertical emittance growth, which can distort the flat-beam profile and degrade luminosity. We propose a dynamic focusing scheme that combines sextupoles with crab cavities to suppress the hourglass-induced resonance. This approach increases tolerance to fluctuations and improves the robustness of flat-beam collisions. This practical mitigation facilitates the adoption of flat-beam collisions in next-generation lepton-hadron colliders. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_21289 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dynamic Focusing to Suppress Emittance Transfer in Crab-Crossing Flat Beam Collisions Xu, Derong Berg, J Scott Blaskiewicz, Michael M Hao, Yue Luo, Yun Montag, Christoph Nagaitsev, Sergei Podobedov, Boris Ptitsyn, Vadim Willeke, Ferdinand Xiao, Binping Accelerator Physics Flat hadron beam collisions, though expected to enhance peak luminosity by about an order of magnitude, have not yet been demonstrated. Our study reveals a critical limitation: realistic fluctuations, when amplified by synchro-betatron resonance, lead to transverse emittance transfer in flat-beam collisions. Using beam-beam simulations based on Electron-Ion Collider design parameters, we show that this effect leads to vertical emittance growth, which can distort the flat-beam profile and degrade luminosity. We propose a dynamic focusing scheme that combines sextupoles with crab cavities to suppress the hourglass-induced resonance. This approach increases tolerance to fluctuations and improves the robustness of flat-beam collisions. This practical mitigation facilitates the adoption of flat-beam collisions in next-generation lepton-hadron colliders. |
| title | Dynamic Focusing to Suppress Emittance Transfer in Crab-Crossing Flat Beam Collisions |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2506.21289 |