Abstract
Following the work of Nguyen-Hoe and collaborators on Lyman-alpha line and introducing the effects of the internal structure of the emitter, due to Lorentz field (Stark in motion) and to the motion of the emitter (Doppler), we develop a model to obtain line shapes similar to those observed at the plasma edge of the Tokamak Tore Supra. In this region, the temperature is notably lower than at the center. Hence, the hypothesis that the speed of the emitter is purely thermal, and equal to (k(B)T/M)(1/2), becomes invalid in these conditions. Our innovation is to propose a Maxwell distribution for the speed of the emitters and this leads to a better global agreement with the observed line shapes. We then use our theoretical shapes to model the experimental lines, taking into account Doppler, Stark, and Zeeman effects. Our analysis shows that it is necessary to take into account two distinct populations of deuterium atoms. The method allows the diagnosis of the different populations of neutral deuterium and to determine many plasma parameters.