Injection induced by coaxial laser interference in laser wakefield accelerators

Wang Jia; Zeng Ming; Li Dazhang; Wang Xiaoning; Lu Wei; Gao Jie

doi:10.1063/5.0101098

Volume 7 Issue 5

Sep. 2022

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Wang Jia, Zeng Ming, Li Dazhang, Wang Xiaoning, Lu Wei, Gao Jie. Injection induced by coaxial laser interference in laser wakefield accelerators[J]. Matter and Radiation at Extremes, 2022, 7(5): 054001. doi: 10.1063/5.0101098

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Wang Jia, Zeng Ming, Li Dazhang, Wang Xiaoning, Lu Wei, Gao Jie. Injection induced by coaxial laser interference in laser wakefield accelerators[J]. Matter and Radiation at Extremes, 2022, 7(5): 054001. doi: 10.1063/5.0101098

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Injection induced by coaxial laser interference in laser wakefield accelerators

doi: 10.1063/5.0101098

Wang Jia^{1, 2
,},
Zeng Ming^{1, 2
,
,
,},
Li Dazhang^{1, 2
,
,
,},
Wang Xiaoning^{1, 2
,},
Lu Wei³,
Gao Jie^{1, 2}

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Department of Engineering Physics, Tsinghua University, Beijing 100084, China

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Corresponding author: a)Authors to whom correspondence should be addressed: zengming@ihep.ac.cn and lidz@ihep.ac.cn; a)Authors to whom correspondence should be addressed: zengming@ihep.ac.cn and lidz@ihep.ac.cn
Received Date: 2022-05-29
Accepted Date: 2022-07-31

Available Online: 2022-09-01

Publish Date: 2022-09-01

Abstract

Abstract

We propose a new injection scheme that can generate electron beams with simultaneously a few permille energy spread, submillimeter milliradian emittance, and more than a 100 pC charge in laser wakefield accelerators. In this scheme, a relatively loosely focused laser pulse drives the plasma wakefield, and a tightly focused laser pulse with similar intensity triggers an interference ring pattern that creates onion-like multisheaths in the plasma wakefield. Owing to the change in wavefront curvature after the focal position of the tightly focused laser, the innermost sheath of the wakefield expands, which slows down the effective phase velocity of the wakefield and triggers injection of plasma electrons. Both quasicylindrical and fully three-dimensional particle-in-cell simulations confirm the generation of beams with the above mentioned properties.

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References(42)

References

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