On the Trapping and Retention of Hydrogen Isotopes in Graphite under Sequential Hydrogen Plasma Irradiation

Resumo

The results of studying the trapping and retention of hydrogen and deuterium in MPG-8 graphite under sequential irradiation with ions of deuterium and hydrogen plasma are presented. The effect of the energy and density of the hydrogen-ion flux, the impurity of oxygen in the plasma, and the temperature of the irradiated samples on a decrease in the deuterium concentration and hydrogen trapping in graphite is studied. Based on the analysis of experimental data, it is suggested that the observed effect of deuterium removal can be explained by the chemical sputtering of graphite.