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Hot electron transport and heating in dense plasma core by hollow guiding

Published online by Cambridge University Press:  14 October 2010

C.T. Zhou*
Affiliation:
Institute of Applied Physics and Computational Mathematics, People's Republic of China Center for Applied Physics and Technology, Peking University, People's Republic of China Institute for Fusion Theory and Simulation, Zhejiang University, People's Republic of China
S.Z. Wu
Affiliation:
Institute of Applied Physics and Computational Mathematics, People's Republic of China
H.B. Cai
Affiliation:
Institute of Applied Physics and Computational Mathematics, People's Republic of China Center for Applied Physics and Technology, Peking University, People's Republic of China
M. Chen
Affiliation:
Institute of Applied Physics and Computational Mathematics, People's Republic of China
L.H. Cao
Affiliation:
Institute of Applied Physics and Computational Mathematics, People's Republic of China Center for Applied Physics and Technology, Peking University, People's Republic of China
X.G. Wang
Affiliation:
Institute for Fusion Theory and Simulation, Zhejiang University, People's Republic of China
L.Y. Chew
Affiliation:
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
X.T. He
Affiliation:
Institute of Applied Physics and Computational Mathematics, People's Republic of China Center for Applied Physics and Technology, Peking University, People's Republic of China Institute for Fusion Theory and Simulation, Zhejiang University, People's Republic of China
*
Address correspondence and reprint requests to: C.T. Zhou, Institute of Applied Physics and Computational Mathematics, Beijing 100094, Peoples Republic of China. E-mail: zcangtao@iapcm.ac.cn

Abstract

A new scheme for cone-hollow-assisted fast ignition in inertial fusion is investigated. A hollow is attached to the tip of a conventional gold cone. The transport and heating of the high-current electrons propagating from the cone tip to the compressed fuel core along the hollow is investigated by two-dimensional hybrid simulation. Different hollow geometry sizes are examinized. It is shown that with proper hollow guiding, hot electrons can be collimated between the inner-walls of the hollow by the large interface magnetic fields appearing on the inner surface. When the beam electrons further propagate into the dense region, they are scattered into the gold hollow through collisions with the fuel electrons and ions. The resulting magnetic potential around the hollow then bends beam electrons along the gold hollow to reach the dense core.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2010

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