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Collimation of hot electron beams by external field from magnetic-flux compression

Published online by Cambridge University Press:  20 August 2013

Yuqiu Gu ,
Jinqing Yu ,
Weimin Zhou ,
Fengjuan Wu ,
Jian Wang ,
Hongjie Liu ,
Leifeng Cao  and
Baohan Zhang
Yuqiu Gu*
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
Jinqing Yu
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China Vacuum Electronics National Laboratory, University of Electronic Science and Technology of China, Chengdu, China
Weimin Zhou
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
Fengjuan Wu
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
Jian Wang
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
Hongjie Liu
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
Leifeng Cao
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
Baohan Zhang
Affiliation:
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, China
*
Address correspondence and reprint requests to: Yu-Qiu Gu, Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900China. E-mail: yqgu@caep.ac.cn
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Abstract

In fast ignition of inertial confinement fusion, hot electron beam is considered to be an appropriate energy source for ignition. However, hot electrons are divergent as they are transporting in over-dense plasma. So collimating the hot electrons becomes one of the most important issues in fast ignition. A method to collimate hot electron beam by external magnetic field is proposed in this paper. The external field can be generated by compressing a seed magnetic field at the stage of laser-driven implosion. This method is confirmed by particle-in-cell simulations. The results show that hot electrons are well collimated by external magnetic field from magnetic-flux compression.

Keywords

CollimationExternal fieldHot electronMagnetic-flux compression
Type
Research Article
Information
Laser and Particle Beams , Volume 31 , Issue 4 , December 2013 , pp. 579 - 582
Copyright
Copyright © Cambridge University Press 2013 

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