Abstract

A method for obtaining the radial distribution of plasma ion velocities from line-of-sight spectral intensity measurements is described. This method is applicable to optically thin plasmas possessing cylindrical or toroidal symmetry and depends only on relative intensity measurements from a number of line-of-sight views through the plasma. The Doppler effect from ordered motions is assumed to be the dominant mechanism in determining the line shape of the observed spectral lines. An analytic expression relating the intensity as a function of wavelength to the plasma emissivity and ion-flow velocity is derived for a cold plasma. By assuming a model for the velocity profile, the intensity profile may be deduced. By using data from several lines of sight through the plasma, it is possible to optimize the adjustable parameters of the assumed velocity profile.

© 1987 Optical Society of America

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