Abstract
The alpha particles produced in inertial fusion reactions are less energetic than (or of the order of) a MeV/amu. The surrounding electronic plasma has a thermal velocity from 0.1 to 10 keV, while Deuterium–Tritium thermal velocity remains usually lower. Then the velocity scale of the different actors is the following one: V thi ⪡ V p < V the , ( V thi and V the being, respectively, the plasma ion and electron thermal velocities, and V p the alpha projectile velocity). In this low projectile velocity regime, we are investigating the influence of a strong external magnetic field on the energy loss of light ions. A brief review of different theoretical approaches results is presented first. Then we study a diffusion coefficient, transverse to the external magnetic field, of a light ion in an electron plasma target to characterize the B-dependence of this diffusion and consequently the energy loss. Finally, we look at the multiple scattering of a light ion by an electron plasma target and how the magnetic field could affect the projectile penetration depth.
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