Velocity relaxation of injected H0 particles into a high-temperature hydrogen plasma

The velocity relaxation of an H0 beam which is injected into high-temperature plasma is analyzed by making a Fokker-Planck-type equation. The most important point is the fact that the diffusion rate in the velocity space of an H0 particle is directly proportional to the plasma temperature. Thus the effective energy relaxation of the H0 beam in the high-temperature plasma would be expected. It is shown that the Fokker-Planck-type equation satisfies the Boltzmann H theorem in the absence of particles loss. The constant of time decay of the beam density by the ionization with plasma ions, the thermalizing effect, and a method of possible analysis of trapped ions are also discussed