The Mapping and Visualization of Deuterium in Surfaces of Plasma Facing Components

Abstract: In this paper we discuss how the spatial distribution of deuterium and especially its depth distribution can be determined and visualized for Plasma Facing Components (PFC). The main incentive of the project is to find attractive ways of presenting the distribution. Common ways of presentation are cross sectional 2D images. However, to give a more interactive way of studying the data we present a distinctive 3D solution. To reach this goal, a software was developed in MATLAB that used nuclear reaction data from micro Ion Beam Analysis (µ-IBA), to estimate the deuterium distributions of samples with trapped deuterium. The next step was to present the data, which was realized by a rotatable three-dimensional graph of transparent data points with shifting colors of deuterium concentration relative to the surface material. Deuterium distribution of a divertor surface from the JET tokamak is visualized, along with deuterium blisters in a tungsten surface. The precision and the significance of the results may be improved by theoretical expansion and numerical methods, such as the consideration of concentration dependent stopping power expressions.