Influence of proton beam Coulomb explosion in laser proton acceleration |
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| Authors: | Jinqing Yu Xiaolin Jin Weimin Zhou Yuqiu Gu Rongxin Zhan Zongqing Zhao Leifeng Cao Bin Li |
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| Affiliation: | 1. Vacuum Electronics National Laboratory, University of Electronic Science and Technology of China, Chengdu 610054, China;2. Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China;3. The Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom;4. Institute of Engineering Physics, College of Science National University of Defense Technology, Changsha 410073, China;5. School of Information Engineering, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | To further understand proton acceleration driven by the interaction between ultra-intense laser pulse and foil targets, the influence of proton beam Coulomb explosion has been analyzed theoretically and investigated using two-dimensional particle-in-cell (2D-PIC) simulations. Employing different proton layer sizes in the simulations, it is found that proton beam Coulomb explosion plays an important role on proton acceleration, in particular on proton cut off energy. Proton dynamics including the effect of both sheath field and proton beam Coulomb explosion was proposed and discussed in detail. This work may serve to improve the understanding of proton acceleration driven by intense laser-foil interactions. |
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| Keywords: | Proton beam Coulomb explosion Particle-in-cell simulations Proton acceleration |
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