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

Published online by Cambridge University Press:  22 February 2013

Fengjuan Wu
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang, Sichuan, China
Weimin Zhou
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Lianqiang Shan
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Zongqing Zhao
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Jinqing Yu
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Bo Zhang
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Yonghong Yan
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Zhimeng Zhang
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Yuqiu Gu
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan, China
Corresponding
E-mail address:

Abstract

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.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2013

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