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Effect of inside diameter of tip on proton beam produced by intense laser pulse on double-layer cone targets

  • Fengjuan Wu (a1) (a2), Weimin Zhou (a1), Lianqiang Shan (a1), Zongqing Zhao (a1), Jinqing Yu (a1), Bo Zhang (a1), Yonghong Yan (a1), Zhimeng Zhang (a1) and Yuqiu Gu (a1)...


The laser-driven acceleration of proton beams from a double-layer cone target, comprised of a cone shaped high-Z material target with a low density proton layer, is investigated via two-dimensional fully relativistic electro-magnetic particle-in-cell simulations. The dependence of the inside diameter (ID) of the tip size of a double-layer cone target on proton beam characteristics is demonstrated. Our results show that the peak energy of proton beams significantly increases and the divergence angle decreases with decreasing ID size. This can be explained by the combined effects of a stronger laser field that is focused inside the cone target and a larger laser interaction area by reducing the ID size.


Corresponding author

Address correspondence and reprint requests to: Yuqiu Gu, Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan Province, 621900, China. E-mail:


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