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Angular dependence of M and N band radiation and the effect of angular anisotropy on the total conversion efficiency of X rays emitted from a laser irradiated gold foil

Published online by Cambridge University Press:  09 March 2009

N.K. Gupta  and
V. Kumar
N.K. Gupta
Affiliation:
Theoretical Physics Division, Fifth Floor, Central Complex, Bhabha Atomic Research Center, Bombay-400 085, India
V. Kumar
Affiliation:
Theoretical Physics Division, Fifth Floor, Central Complex, Bhabha Atomic Research Center, Bombay-400 085, India
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Abstract

In this paper, we present the results of our theoretical studies on the angular dependence of M and N band peaks emitted from a laser irradiated gold foil. The M band peak is seen to be nearly isotropic, while the magnitude of the N band peak decreases as we move away from normal to the foil. The trend is similar to that reported in the experiments of Chase et al.: (1977) for aluminium foil. It is also observed that the N band peak shifts towards longer wavelength as the angle φ relative to the normal to the target increases. We also present the effect of angular anisotropy on time and frequency integrated total conversion efficiency of laser light into X rays using a high Z target. As compared with the diffusion approximation, a significant reduction in conversion efficiency is observed for a wide range of laser powers, and wavelengths.

Type
Research Article
Information
Laser and Particle Beams , Volume 13 , Issue 3 , September 1995 , pp. 389 - 402
Copyright
Copyright © Cambridge University Press 1995

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