Multi-color XFEL pulses with variable color separation and time delay for multi-frame diffraction imaging
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911722180182016 |
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| author | Liu, Xiaodan Yang, Hanxiang Yan, Bingyang Wang, Yue Huang, Nanshun Han, Liqi Cai, Jie Wen, Han Yu, Jinqing Deng, Haixiao Yan, Xueqing |
| author_facet | Liu, Xiaodan Yang, Hanxiang Yan, Bingyang Wang, Yue Huang, Nanshun Han, Liqi Cai, Jie Wen, Han Yu, Jinqing Deng, Haixiao Yan, Xueqing |
| contents | X-ray free-electron lasers (XFELs) of high brightness have opened new opportunities for exploring ultrafast dynamical processes in matter, enabling imaging and movies of single molecules and particles at atomic resolution. In this paper, we present a straightforward method for multi-frame diffraction imaging, using the same electron beam to generate four-color XFEL pulses with adjustable wavelength separation and time delay. The optical klystron scheme is introduced to enhance FEL intensity and reduce the total length of undulators. The time delay is tuned via a magnetic chicane between the undulators with various colors. Using parameters of SHINE, start-to-end simulations demonstrate the effectiveness and tunability of our method, achieving representative results such as time delays of hundreds of femtoseconds and four-color XFEL pulses spanning 1.8 to 2.7 nm with 0.3 nm intervals. The proposed scheme enables the recording of multi-frame diffraction images in a single exposure, providing a new perspective for ultrafast molecular and atomic dynamics studies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_14906 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Multi-color XFEL pulses with variable color separation and time delay for multi-frame diffraction imaging Liu, Xiaodan Yang, Hanxiang Yan, Bingyang Wang, Yue Huang, Nanshun Han, Liqi Cai, Jie Wen, Han Yu, Jinqing Deng, Haixiao Yan, Xueqing Accelerator Physics Optics X-ray free-electron lasers (XFELs) of high brightness have opened new opportunities for exploring ultrafast dynamical processes in matter, enabling imaging and movies of single molecules and particles at atomic resolution. In this paper, we present a straightforward method for multi-frame diffraction imaging, using the same electron beam to generate four-color XFEL pulses with adjustable wavelength separation and time delay. The optical klystron scheme is introduced to enhance FEL intensity and reduce the total length of undulators. The time delay is tuned via a magnetic chicane between the undulators with various colors. Using parameters of SHINE, start-to-end simulations demonstrate the effectiveness and tunability of our method, achieving representative results such as time delays of hundreds of femtoseconds and four-color XFEL pulses spanning 1.8 to 2.7 nm with 0.3 nm intervals. The proposed scheme enables the recording of multi-frame diffraction images in a single exposure, providing a new perspective for ultrafast molecular and atomic dynamics studies. |
| title | Multi-color XFEL pulses with variable color separation and time delay for multi-frame diffraction imaging |
| topic | Accelerator Physics Optics |
| url | https://arxiv.org/abs/2509.14906 |