Dynamics of the component composition of a hydrogen beam in a hydrogen target

To study the structure of a neutral beam ( fast hydrogen atoms), injected into a thermonuclear installation the effect of the stripping target thickness on the beam composition is considered. On the base of cross-sections of elementary processes the calculations of hydrogen beam passing through the stripping target of molecular hydrogen within energy range from 5 to 160 keV are carried out. The dependence on the energy of equilibrium yield of fast hydrogen atoms is given. In beams with the energies <= 40 keV the presence of considerable quantity of fast hydrogen molecules with E0 and 2/3 E0 energies, where E0 is the energy at the ion source outlet with target thickness up to 1x1016 cm-2 is shown