中国物理B ›› 2023, Vol. 32 ›› Issue (10): 105202-105202.doi: 10.1088/1674-1056/ace428

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Efficient ion acceleration driven by a Laguerre-Gaussian laser in near-critical-density plasma

Jia-Xiang Gao(高嘉祥)1, Meng Liu(刘梦)2,†, and Wei-Min Wang(王伟民)1,3,4,‡   

  1. 1 Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials and Micronano Devices, Renmin University of China, Beijing 100872, China;
    2 Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, China;
    3 Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education), Renmin University of China, Beijing 100872, China;
    4 IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
  • 收稿日期:2023-05-13 修回日期:2023-06-22 接受日期:2023-07-05 出版日期:2023-09-21 发布日期:2023-09-27
  • 通讯作者: Meng Liu, Wei-Min Wang E-mail:liumeng@ncepu.edu.cn;weiminwang1@ruc.edu.cn
  • 基金资助:
    Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA25050300), the National Natural Science Foundation of China (Grant No. 12205366), the National Key Research and Development Program of China (Grant No. 2018YFA0404801), the Fundamental Research Funds for the Central Universities (Grant No. 2020MS138), and the Research Funds of Renmin University of China (Grant No. 20XNLG01).

Efficient ion acceleration driven by a Laguerre-Gaussian laser in near-critical-density plasma

Jia-Xiang Gao(高嘉祥)1, Meng Liu(刘梦)2,†, and Wei-Min Wang(王伟民)1,3,4,‡   

  1. 1 Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials and Micronano Devices, Renmin University of China, Beijing 100872, China;
    2 Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, China;
    3 Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education), Renmin University of China, Beijing 100872, China;
    4 IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2023-05-13 Revised:2023-06-22 Accepted:2023-07-05 Online:2023-09-21 Published:2023-09-27
  • Contact: Meng Liu, Wei-Min Wang E-mail:liumeng@ncepu.edu.cn;weiminwang1@ruc.edu.cn
  • Supported by:
    Project supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDA25050300), the National Natural Science Foundation of China (Grant No. 12205366), the National Key Research and Development Program of China (Grant No. 2018YFA0404801), the Fundamental Research Funds for the Central Universities (Grant No. 2020MS138), and the Research Funds of Renmin University of China (Grant No. 20XNLG01).

摘要: Laser-driven ion accelerators have the advantages of compact size, high density, and short bunch duration over conventional accelerators. Nevertheless, it is still challenging to generate ion beams with quasi-monoenergetic peak and low divergence in experiments with the current ultrahigh intensity laser and thin target technologies. Here we propose a scheme that a Laguerre-Gaussian laser irradiates a near-critical-density (NCD) plasma to generate a quasi-monoenergetic and low-divergence proton beam. The Laguerre-Gaussian laser pulse in an NCD plasma excites a moving longitudinal electrostatic field with a large amplitude, and it maintains the inward bowl-shape for dozens of laser durations. This special distribution of the longitudinal electrostatic field can simultaneously accelerate and converge the protons. Our particle-in-cell (PIC) simulation shows that the efficient proton acceleration can be realized with the Laguerre-Gaussian laser intensity ranging from $3.9\times {10}^{21}$ W$\cdot$cm$^{-2}$-$1.6\times 10^{22}$ W$\cdot$cm$^{-2}$ available in the near future, e.g., a quasi-monoenergetic proton beam with peak energy $\sim 115 $ MeV and divergence angles less than 5$^\circ$ can be generated by a $5.3\times 10^{21}$ W$\cdot $cm$^{-2}$ pulse. This work could provide a reference for the high-quality ion beam generation with PWclass laser systems available recently.

关键词: Laguerre-Gaussian laser, laser-driven ion acceleration, particle-in-cell simulations, near-critical-density plasma

Abstract: Laser-driven ion accelerators have the advantages of compact size, high density, and short bunch duration over conventional accelerators. Nevertheless, it is still challenging to generate ion beams with quasi-monoenergetic peak and low divergence in experiments with the current ultrahigh intensity laser and thin target technologies. Here we propose a scheme that a Laguerre-Gaussian laser irradiates a near-critical-density (NCD) plasma to generate a quasi-monoenergetic and low-divergence proton beam. The Laguerre-Gaussian laser pulse in an NCD plasma excites a moving longitudinal electrostatic field with a large amplitude, and it maintains the inward bowl-shape for dozens of laser durations. This special distribution of the longitudinal electrostatic field can simultaneously accelerate and converge the protons. Our particle-in-cell (PIC) simulation shows that the efficient proton acceleration can be realized with the Laguerre-Gaussian laser intensity ranging from $3.9\times {10}^{21}$ W$\cdot$cm$^{-2}$-$1.6\times 10^{22}$ W$\cdot$cm$^{-2}$ available in the near future, e.g., a quasi-monoenergetic proton beam with peak energy $\sim 115 $ MeV and divergence angles less than 5$^\circ$ can be generated by a $5.3\times 10^{21}$ W$\cdot $cm$^{-2}$ pulse. This work could provide a reference for the high-quality ion beam generation with PWclass laser systems available recently.

Key words: Laguerre-Gaussian laser, laser-driven ion acceleration, particle-in-cell simulations, near-critical-density plasma

中图分类号:  (Laser-plasma acceleration of electrons and ions)

  • 52.38.Kd
52.65.Rr (Particle-in-cell method) 41.75.Jv (Laser-driven acceleration?)