Nanometer-scale pre-bunched electron beams generated from all-optical plasma-based acceleration
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866917286746521600 |
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| author | Wang, Zhenan Xu, Zewei Ma, Qianyi Xia, Yuhui Liu, Letian Wang, Chenxu Dalichaouch, Thamine Yan, Xueqing Xu, Xinlu Mori, Warren B. |
| author_facet | Wang, Zhenan Xu, Zewei Ma, Qianyi Xia, Yuhui Liu, Letian Wang, Chenxu Dalichaouch, Thamine Yan, Xueqing Xu, Xinlu Mori, Warren B. |
| contents | High-quality and prebunched electron beams can produce coherent x-rays with high intensity and narrow bandwidth, which is essential for modern light sources. An all-optical scheme based on plasma-based acceleration to produce bright electron beams that are pre-bunched on nanometer-scales is proposed. By using a density modulation created by two low intensity counter-propagating lasers, the phase velocity of the plasma wake excited by an intense driver laser in a uniform plasma can be modulated at a frequency twice that of the colliding lasers and thus turn the injection on and off. The injected electrons are micro-bunched at the Doppler shifted wavelength of the modulated wavelength using the corresponding phase velocity of the gradual expansion of the wakefield. It is demonstrated that by controlling the properties of the drive and colliding lasers, that beams with exotic pre-bunched structures can be produced, which may have critical applications in ultrafast high power x-rays. This extremely compact, all-optical scheme to produce ultra-bright pre-bunched electron beams may therefore enable novel applications for ultrafast x-ray users and arouse general interest in various fields. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_19081 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Nanometer-scale pre-bunched electron beams generated from all-optical plasma-based acceleration Wang, Zhenan Xu, Zewei Ma, Qianyi Xia, Yuhui Liu, Letian Wang, Chenxu Dalichaouch, Thamine Yan, Xueqing Xu, Xinlu Mori, Warren B. Accelerator Physics Plasma Physics High-quality and prebunched electron beams can produce coherent x-rays with high intensity and narrow bandwidth, which is essential for modern light sources. An all-optical scheme based on plasma-based acceleration to produce bright electron beams that are pre-bunched on nanometer-scales is proposed. By using a density modulation created by two low intensity counter-propagating lasers, the phase velocity of the plasma wake excited by an intense driver laser in a uniform plasma can be modulated at a frequency twice that of the colliding lasers and thus turn the injection on and off. The injected electrons are micro-bunched at the Doppler shifted wavelength of the modulated wavelength using the corresponding phase velocity of the gradual expansion of the wakefield. It is demonstrated that by controlling the properties of the drive and colliding lasers, that beams with exotic pre-bunched structures can be produced, which may have critical applications in ultrafast high power x-rays. This extremely compact, all-optical scheme to produce ultra-bright pre-bunched electron beams may therefore enable novel applications for ultrafast x-ray users and arouse general interest in various fields. |
| title | Nanometer-scale pre-bunched electron beams generated from all-optical plasma-based acceleration |
| topic | Accelerator Physics Plasma Physics |
| url | https://arxiv.org/abs/2602.19081 |