Near-GeV Electron Beams at a Few Per-Mille Level from a Laser Wakefield Accelerator via Density-Tailored Plasma
| Autor: | Wentao Wang, Xue Yang, Y. B. Chen, Jiansheng Liu, Lintong Ke, Ruxin Li, Y. F. Xu, Yongbin Leng, C. H. Yu, Rong Qi, Ke Feng, Zhiwei Xu, Z. Y. Qin, Z. J. Zhang, Yonghong Wu |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 126 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.126.214801 |
| Popis: | A simple, efficient scheme was developed to obtain near-gigaelectronvolt electron beams with energy spreads of few per-mille level in a single-stage laser wakefield accelerator. Longitudinal plasma density was tailored to control relativistic laser-beam evolution, resulting in injection, dechirping, and a quasi-phase-stable acceleration. With this scheme, electron beams with peak energies of 780--840 MeV, rms energy spreads of 2.4\mbox{\textperthousand}--4.1\mbox{\textperthousand}, charges of 8.5--23.6 pC, and rms divergences of 0.1--0.4 mrad were experimentally obtained. Quasi-three-dimensional particle-in-cell simulations agreed well with the experimental results. The dechirping strength was estimated to reach up to $11\text{ }\text{ }\mathrm{TeV}/\mathrm{mm}\mathrm{/m}$, which is higher than previously obtained results. Such high-quality electron beams will boost the development of compact intense coherent radiation sources and x-ray free-electron lasers. |
| Databáze: | OpenAIRE |
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