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Effect of plasma material on intense laser-driven beam electrons in solid foils

Published online by Cambridge University Press:  05 January 2012

C.T. Zhou*
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China Center for Applied Physics and Technology, Peking University, Beijing, People's Republic of China
T.X. Cai
Affiliation:
Graduate School of China Academy of Engineering Physics, Beijing, People's Republic of China
W.Y. Zhang
Affiliation:
China Academy of Engineering Physics, Beijing, People's Republic of China
X.T. He
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China Center for Applied Physics and Technology, Peking University, Beijing, People's Republic of China
*
Address correspondence and reprint requests to: C.T. Zhou, Institute of Applied Physics and Computational Mathematics, Beijing 100094, People's Republic of China. E-mail: [email protected]

Abstract

The electromagnetic field structures and transport properties of laser produced relativistic beam electrons propagating through Au+25, Cu+20, Al+10, and C+5 plasma foils are investigated. Simulations show that high plasma resistivity as well as high collision rate of the beam electrons with gold and copper plasmas can hinder the forward motion of the beam electrons inside the targets. However, the beam electrons can propagate for a relatively long distance in aluminum and carbon plasma targets. They are well collimated by the strong self-generated resistive magnetic field, resulting in higher sheath electric fields behind the target. The use of low-Z target material is therefore more efficient for collimating beam electrons as well as generating higher-energy ions.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2011

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