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Two-dimensional particle-in-cell simulation of energetic proton generation by an intense ultrashort laser pulse

Published online by Cambridge University Press:  20 December 2006

T. OKADA ,
Y. MIKADO  and
K. OKUBO
T. OKADA
Affiliation:
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan Present address: Tokyo University of Agriculture and Technology, Koganei 2-24-16, Tokyo, Japan.
Y. MIKADO
Affiliation:
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
K. OKUBO
Affiliation:
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
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Abstract

Two-dimensional particle-in-cell (PIC) simulations of fast particles produced by a short laser pulse with a duration of 40 fs and an intensity of $10^{20}$ W cm$^{-2}$ interacting with a foil target are performed. The dependence of the energy of the generated fast protons on the target geometry is examined. The absorbed laser energy is transferred to fast electrons, which interact with the foil and are partially ejected from the foil surfaces. These electrons produce an electric field that causes a proton beam to be emitted from the rear surface of the foil. Various kinds of target are considered. The optimum target plasma conditions for the maximum proton acceleration are determined.

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 6 , December 2006 , pp. 1273 - 1276
Copyright
2006 Cambridge University Press

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