Spatiotemporal shaping of attosecond X-rays with time-dependent orbital angular momentum
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866908758162014208 |
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| author | Xu, Chenzhi Yan, Jiawei Geloni, Gianluca Lechner, Christoph Deng, Haixiao |
| author_facet | Xu, Chenzhi Yan, Jiawei Geloni, Gianluca Lechner, Christoph Deng, Haixiao |
| contents | Attosecond X-ray pulses are indispensable for exploring ultrafast phenomena in matter on Angstrom and attosecond scales. Here we propose a new method to realize spatiotemporal shaping of attosecond X-rays through temporal control of the orbital angular momentum mode content using an X-ray free-electron laser. The method exploits transverse-mode-dependent frequency pulling in a deliberately detuned second stage, together with slippage between the seed and the amplified radiation. Three-dimensional simulations show a double-spike waveform in which the two spikes carry different dominant topological charges. The spike separation is tunable and can reach several hundred attoseconds. This provides a source-level route to spatiotemporally structured attosecond X-rays with controllable temporal structure and topological mode content. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_19020 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spatiotemporal shaping of attosecond X-rays with time-dependent orbital angular momentum Xu, Chenzhi Yan, Jiawei Geloni, Gianluca Lechner, Christoph Deng, Haixiao Accelerator Physics Attosecond X-ray pulses are indispensable for exploring ultrafast phenomena in matter on Angstrom and attosecond scales. Here we propose a new method to realize spatiotemporal shaping of attosecond X-rays through temporal control of the orbital angular momentum mode content using an X-ray free-electron laser. The method exploits transverse-mode-dependent frequency pulling in a deliberately detuned second stage, together with slippage between the seed and the amplified radiation. Three-dimensional simulations show a double-spike waveform in which the two spikes carry different dominant topological charges. The spike separation is tunable and can reach several hundred attoseconds. This provides a source-level route to spatiotemporally structured attosecond X-rays with controllable temporal structure and topological mode content. |
| title | Spatiotemporal shaping of attosecond X-rays with time-dependent orbital angular momentum |
| topic | Accelerator Physics |
| url | https://arxiv.org/abs/2508.19020 |