Hydrogen recycling study by Balmer lines emissions in linear plasma machine TPE

We have investigated the influence of target materials and temperatures on Balmer series emission in a linear plasma apparatus, Tritium Plasma Experiment (TPE), The intensities of the Balmer series emission in front of the target were higher for heavier mass target and also for lower target temperature, showing rather linear relationship between the emission intensity and hydrogen reflection coefficient, For exothermic hydrogen occluders of Ti and Ta, the intensity ratio of D beta /D alpha increased with the target temperature marliedly, whereas the intensity ratio stayed rather constant for endothermic hydrogen occluders of Ni, Cu and W. This is a clear demonstration that the target materials and temperatures modify the boundary plasma. In addition the intensity ratio D beta /D alpha is not simply a function of plasma temperature but has clear target temperature dependence. (C) 2001 Elsevier Science B.V. All rights reserved.