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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2605.05734 |
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| _version_ | 1866914537431629824 |
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| author | Guo, Zixiao Feng, Ke Lou, Zhiheng Wang, Guiyao Wang, Wentao Li, Ruxin |
| author_facet | Guo, Zixiao Feng, Ke Lou, Zhiheng Wang, Guiyao Wang, Wentao Li, Ruxin |
| contents | Femtosecond electron beams with complex modulation play a crucial role in applications such as X-ray Free Electron Lasers (XFELs) and plasma wakefield accelerators. However, diagnostics for the electron beam current profile still face challenges with complex structure. In this letter, we propose a novel temporal retrieval algorithm for the coherent transition radiation (CTR) diagnostics of complex modulated electron beams. Starting from the time-frequency analysis of the electron bunch train, the algorithm separates and reconstructs the high- and low-frequency components. A temporal kernel was derived from the inverse sampling of the measured spectrum to construct the high-frequency component, while the low-frequency envelope was composed of several basis functions. Tested on the electron bunch trains from the complex multi-gaussian model and bunching-enhanced coherent harmonic generation, the algorithm successfully reconstructed the temporal signals and achieves better performance than the Kramers-Kronig method. This method is expected to crucial provide temporal evidence for potential electron beam modulation schemes, and will enable broad prospects for future applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_05734 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Temporal Retrieval Method for Modulated Electron Bunches via Adaptive Kernel Reconstruction Guo, Zixiao Feng, Ke Lou, Zhiheng Wang, Guiyao Wang, Wentao Li, Ruxin Accelerator Physics Computational Physics Optics Plasma Physics Femtosecond electron beams with complex modulation play a crucial role in applications such as X-ray Free Electron Lasers (XFELs) and plasma wakefield accelerators. However, diagnostics for the electron beam current profile still face challenges with complex structure. In this letter, we propose a novel temporal retrieval algorithm for the coherent transition radiation (CTR) diagnostics of complex modulated electron beams. Starting from the time-frequency analysis of the electron bunch train, the algorithm separates and reconstructs the high- and low-frequency components. A temporal kernel was derived from the inverse sampling of the measured spectrum to construct the high-frequency component, while the low-frequency envelope was composed of several basis functions. Tested on the electron bunch trains from the complex multi-gaussian model and bunching-enhanced coherent harmonic generation, the algorithm successfully reconstructed the temporal signals and achieves better performance than the Kramers-Kronig method. This method is expected to crucial provide temporal evidence for potential electron beam modulation schemes, and will enable broad prospects for future applications. |
| title | A Temporal Retrieval Method for Modulated Electron Bunches via Adaptive Kernel Reconstruction |
| topic | Accelerator Physics Computational Physics Optics Plasma Physics |
| url | https://arxiv.org/abs/2605.05734 |