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Collisional effects on fast electron generation and transport in fast ignition

Published online by Cambridge University Press:  09 March 2012

H. Sakagami ,
K. Okada ,
Y. Kaseda ,
T. Taguchi  and
T. Johzaki
H. Sakagami*
Affiliation:
Fundamental Physics Simulation Division, National Institute for Fusion Science, Oroshi-cho, Japan
K. Okada
Affiliation:
Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
Y. Kaseda
Affiliation:
Department of Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
T. Taguchi
Affiliation:
Department of Electrical and Electronics Engineering, Setsunan University, Neyagawa, Japan
T. Johzaki
Affiliation:
Institute of Laser Engineering, Osaka University, Suita, Japan
*
Address correspondence and reprint requests to: H. Sakagami, Fundamental Physics Simulation Division, National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan. E-mail: sakagami.hitoshi@nifs.ac.jp
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Abstract

As the binary collision process requires much more computation time, a statistical electron-electron collision model based on modified Langevin equation is developed to reduce it. This collision model and a simple electron-ion scattering model are installed into one-dimensional PIC code, and collisional effects on fast electron generation and transport in fast ignition are investigated. In the collisional case, initially thermal electrons are heated up to a few hundred keV due to direct energy transfer by electron-electron collision, and they are also heated up to MeV by Joule heating induced by electron-ion scattering. Thus the number of low energy component of fast electrons increase than that in the collisionless case.

Keywords

Collision modelCone-guided targetFast ignitionPIC simulation
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 2 , June 2012 , pp. 243 - 248
Copyright
Copyright © Cambridge University Press 2012

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References

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