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Hydrodynamic efficiency of ablation by a pulsed ion beam for propulsion applications

Published online by Cambridge University Press:  20 December 2006

CHAINARONG BUTTAPENG ,
MASARU YAZAWA  and
NOBUHIRO HARADA
CHAINARONG BUTTAPENG
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, 1603-1, Nagaoka, 940-2188, Japan
MASARU YAZAWA
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, 1603-1, Nagaoka, 940-2188, Japan
NOBUHIRO HARADA
Affiliation:
Department of Electrical Engineering, Nagaoka University of Technology, 1603-1, Nagaoka, 940-2188, Japan
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Abstract

This paper presents the hydrodynamic efficiency of ablation plasma produced by a pulsed ion beam, as obtained on the basis of the ion beam–target interaction concept. We used a one-dimensional hydrodynamic model to explain the ablation acceleration behavior. Hydrodynamic variables are evaluated in terms of ablation velocity, conversion efficiency and ablation efficiency. We obtained 18% value for the energy conversion efficiency, while an ablation efficiency of about 70% is achieved at an ion-beam energy density of 60J cm$^{-2}$ (beam power density of $\approx$1 GW cm$^{-2}$). A thrust producing capability is also investigated.

Information

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 6 , December 2006 , pp. 909 - 913
Copyright
2006 Cambridge University Press

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