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  • Received: May. 9, 2020

    Accepted: Aug. 4, 2020

    Posted: Dec. 16, 2020

    Published Online: Oct. 16, 2020

    The Author Email: Guang-Yue Hu (gyhu@ustc.edu.cn)

    DOI: 10.1017/hpl.2020.30

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    Xiang-Bing Wang, Guang-Yue Hu, Zhi-Meng Zhang, Yu-Qiu Gu, Bin Zhao, Yang Zuo, Jian Zheng. Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma[J]. High Power Laser Science and Engineering, 2020, 8(4): 04000e34

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High Power Laser Science and Engineering, Vol. 8, Issue 4, 04000e34 (2020)

Gamma-ray generation from ultraintense laser-irradiated solid targets with preplasma

Xiang-Bing Wang1,2, Guang-Yue Hu1,3,*, Zhi-Meng Zhang2, Yu-Qiu Gu2,4, Bin Zhao1, Yang Zuo1, and Jian Zheng1,4

Author Affiliations

  • 1CAS Key Laboratory of Geospace Environment and Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei230026, China
  • 2Science and Technology on Plasma Physics Laboratory, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang621900, China
  • 3CAS Center for Excellence in Ultra-intense Laser Science (CEULS), Shanghai200031, China
  • 4IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai200240, China

Abstract

In the laser plasma interaction of quantum electrodynamics (QED)-dominated regime, γ-rays are generated due to synchrotron radiation from high-energy electrons traveling in a strong background electromagnetic field. With the aid of 2D particle-in-cell code including QED physics, we investigate the preplasma effect on the γ-ray generation during the interaction between an ultraintense laser pulse and solid targets. We found that with the increasing preplasma scale length, the γ-ray emission is enhanced significantly and finally reaches a steady state. Meanwhile, the γ-ray beam becomes collimated. This shows that, in some cases, the preplasmas will be piled up acting as a plasma mirror in the underdense preplasma region, where the γ-rays are produced by the collision between the forward electrons and the reflected laser fields from the piled plasma. The piled plasma plays the same role as the usual reflection mirror made from a solid target. Thus, a single solid target with proper scale length preplasma can serve as a manufactural and robust γ-ray source.

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