An elegant method to estimate helium-like ion densities from visible and VUV plasma spectroscopy

Abstract

A method is presented to estimate the densities of He-like carbon and oxygen ions from the observation of the Li-like 3p + 3s transitions inthe visible and the 3p + 2s transitions in the vacuum ulbaviolet The method is based on a zerodimensional model for plasmas with short particle confinement times. General coefficients for this study are derived and evaluated numerically. The method is applied to Extrap-T1 reversed field pinch data