Generation of high-quality electron beams based on tightly focused super-Gaussian laser

Deng Zhigang; He Shukai; Cui Bo; Teng Jian; Zhang Zhimeng

doi:10.11884/HPLPB201830.180262

Volume 30 Issue 11

Nov. 2018

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Deng Zhigang, He Shukai, Cui Bo, et al. Generation of high-quality electron beams based on tightly focused super-Gaussian laser[J]. High Power Laser and Particle Beams, 2018, 30: 111003. doi: 10.11884/HPLPB201830.180262

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Generation of high-quality electron beams based on tightly focused super-Gaussian laser

doi: 10.11884/HPLPB201830.180262

Research Center of Laser Fusion, CAEP, Mianyang 621900, China

Received Date: 2018-10-10
Rev Recd Date: 2018-11-02
Publish Date: 2018-11-15

Abstract

Abstract

Electron optical injection is an efficient all-optical injection scheme in laser wakefield accelerations. However, low-charge and large emittance electron beam is still not suitable for many practical applications. This paper presents a novel injection scheme by colliding a tightly focused super-Gaussian laser with a Gaussian pump laser. It is found that the emittance of electron beam becomes almost an order of magnitude lower than that of all-Gaussian case, while the charge of electron bunch is conserved. It is also found that the electron emittance is mainly attributed to off-axis injected electrons by a Hamiltonian model. This unique ability will pave the way towards the generation of high-quality electron beams and extend the applications of laser-plasma accelerators.
- laser wakefield accelerations,
- optical injection,
- emittance of electron beam,
- off-axis injected electrons,
- tightly focused super-Gaussian laser

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References

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