Title

Measurement Of Extinction Coefficients Of Laser-Produced Aluminum Plumes

Authors

Authors

T. E. Mills; P. J. Bishop;A. Minardi

Comments

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Abbreviated Journal Title

J. Thermophys. Heat Transf.

Keywords

Thermodynamics; Engineering, Mechanical

Abstract

Radial spectral intensities (0.632 mum) were measured using a He:Ne probe laser scanning an aluminum plume formed by Nd:glass laser irradiation of a target surface. Furthermore, techniques were developed to measure the radial distributions of the extinction coefficients in an axisymmetric, laser-produced aluminum plume. The techniques developed allow for measurements of these distributions as functions of time, wavelength, and elevation above the aluminum target. The extinction coefficients determine the ability of the plasma to attenuate incident laser radiation. The extinction coefficient distribution was determined by scanning a He:Ne probe laser through the plume and converting line-of-sight measurements to a radial distribution. Results indicate that the aluminum plume is optically thin in the first 80 mus after formation and that the radial extinction coefficient profile has a Gaussian distribution.

Journal Title

Journal of Thermophysics and Heat Transfer

Volume

8

Issue/Number

2

Publication Date

1-1-1994

Document Type

Article

Language

English

First Page

223

Last Page

228

WOS Identifier

WOS:A1994NG69600005

ISSN

0887-8722

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