Stopping Power and Partial Stopping Power Effective Charge in The Plasma

Abstract

The energy losses of ions moving in an electron gas can be studied through the stopping powerof the medium. A large number of calculations of the stopping power of ions and electrons inplasmas have been carried out using the random phase approximation (RPA) in the dielectricformalism, for low and high energies. Then we calculated the partial stopping power effectivecharge (PSPEC) from the energy loss of an incident proton, Ar-ion, and He-ion in target plasma.The Brandt-Kitagawa (BK) model is used to describe the projectile charge fraction (q) andcalculate the stopping power and PSPEC, which depends on temperature and electron densityρ(k) of the plasma. This is a topic of relevance to understanding the beam-target interaction in thecontexts of particle driven fusion. The presented study is formulated in terms of classicaldielectric functions. The programming language Fortran - 90 was used for a requiredcalculation. In the present work, three systems of plasma (Z-pinch, Tokamak, ICF) for differenttemperatures and densities were covered. Additionally, a comparison has been done with theprevious work of plasma.