期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.214801
关键词
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资金
- National Natural Science Foundation of China [11127901, 11875065, 11974251, 11991072]
- Natural Science Foundation of Shanghai [18JC1414800, 18ZR1444500]
- State Key Laboratory Program of Chinese Ministry of Science and Technology
- Youth Innovation Promotion Association, CAS [Y201952]
- Strategic Priority Research Program (B) [XDB16]
A simple and efficient scheme was developed to obtain high-quality electron beams in a single-stage laser wakefield accelerator, resulting in promising results for the development of compact intense coherent radiation sources and x-ray free-electron lasers.
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%-4.1%, 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 TeV/mm/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.
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