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Collimated proton beam generation from ultraintense laser-irradiated hole target

Published online by Cambridge University Press:  17 June 2010

X.H. Yang
Affiliation:
Department of Physics, National University of Defense Technology, Changsha, China
Y.Y. Ma*
Affiliation:
Department of Physics, National University of Defense Technology, Changsha, China Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, China Center for Optical Research and Education, Graduate School of Engineering, Utsunomiya University, Utsunomiya, Japan
F.Q. Shao
Affiliation:
Department of Physics, National University of Defense Technology, Changsha, China
H. Xu
Affiliation:
National Laboratory Parallel and Distributed Processing, National University of Defense Technology, Changsha, China
M.Y. Yu
Affiliation:
Department of Physics, Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou, China Institut für Theoretische Physik I, Ruhr-Universität Bochum, Bochum, Germany
Y.Q. Gu
Affiliation:
Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, China
T.P. Yu
Affiliation:
Department of Physics, National University of Defense Technology, Changsha, China
Y. Yin
Affiliation:
Department of Physics, National University of Defense Technology, Changsha, China
C.L. Tian
Affiliation:
Department of Physics, National University of Defense Technology, Changsha, China
S. Kawata
Affiliation:
Center for Optical Research and Education, Graduate School of Engineering, Utsunomiya University, Utsunomiya, Japan
*
Address correspondence and reprint requests to: Y.Y. Ma, Department of Physics, National University of Defense Technology, Changsha 410073, China. E-mail: plasim@163.com

Abstract

Collimated proton beams from laser interaction with a slab having a hole on its backside are investigated using particle-in-cell simulation. The hot target electrons driven by the laser expand rapidly into the hole. However, at the hole's corners the electrons are strongly compressed and an intense electron jet is emitted from each corner, tightly followed by the ions. The plasma jets focus and collimate along the axis of the hole and can propagate without divergence within the hole. The effect of the hole diameter on the collimated proton beam is considered.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2010

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