Energy Bunching from Sub-Cycle Ionization Injection in Laser Wakefield Acceleration
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arXiv
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| Autores principales: | , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908490080976896 |
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| author | Angella, A. Löfquist, E. Gustafsson, C. Poulain, V. D'Souza, F. Guo, C. Persson, A. Eng-Johnsson, P. Wahlström, C. -G. Lundh, O. |
| author_facet | Angella, A. Löfquist, E. Gustafsson, C. Poulain, V. D'Souza, F. Guo, C. Persson, A. Eng-Johnsson, P. Wahlström, C. -G. Lundh, O. |
| contents | We report the first experimental observation of carrier-envelope phase-driven energy bunching in laser wakefield acceleration. Using a few-cycle (~9 fs), multi-terawatt laser pulse and ionization injection in a helium-nitrogen gas mixture, we observe electron spectra composed of multiple quasi-monoenergetic peaks with regular narrow energy spacing. This comb structure arises from intermittent injection from successive half-cycles of the laser field, enabled by the evolving carrier-envelope phase during propagation in the plasma. These findings establish sub-cycle ionization injection as a potential route to attosecond control in plasma acceleration, enabling injection and beam structuring synchronized to the optical waveform on sub-femtosecond timescales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_10829 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Energy Bunching from Sub-Cycle Ionization Injection in Laser Wakefield Acceleration Angella, A. Löfquist, E. Gustafsson, C. Poulain, V. D'Souza, F. Guo, C. Persson, A. Eng-Johnsson, P. Wahlström, C. -G. Lundh, O. Plasma Physics Accelerator Physics We report the first experimental observation of carrier-envelope phase-driven energy bunching in laser wakefield acceleration. Using a few-cycle (~9 fs), multi-terawatt laser pulse and ionization injection in a helium-nitrogen gas mixture, we observe electron spectra composed of multiple quasi-monoenergetic peaks with regular narrow energy spacing. This comb structure arises from intermittent injection from successive half-cycles of the laser field, enabled by the evolving carrier-envelope phase during propagation in the plasma. These findings establish sub-cycle ionization injection as a potential route to attosecond control in plasma acceleration, enabling injection and beam structuring synchronized to the optical waveform on sub-femtosecond timescales. |
| title | Energy Bunching from Sub-Cycle Ionization Injection in Laser Wakefield Acceleration |
| topic | Plasma Physics Accelerator Physics |
| url | https://arxiv.org/abs/2508.10829 |