Effect of Ion Temperature Variation in Two-Ion Species Magnetized Plasma Sheath

Abstract

For all practical applications of plasma, it has to be confined and in all such cases a sheath is formed at the material wall, which plays an important role in the properties of overall plasma wall transition region. The effect of ion temperature in a magnetized plasma sheath, which consists of two species of positive ions, has been studied using kinetic theory. The profile of ion densities, electron density, total charge density, potential is obtained by self-consistent solution to a non-neutral, collisionless, time independent plasma sheath. The physical parameters change slowly near the sheath entrance but exhibit steep gradient near the wall. The effect of applied magnetic field is more on ions whereas the electrons are almost non responsive and they are not influenced directly. In presence of magnetic field, the ion density is slightly lower compared to the case without magnetic field. The ion density increases on increasing ion temperature due to increase in their thermal velocity. On increasing the ion temperature, the total charge density at the wall increases and hence the potential decreases in magnitude. The result is useful in understanding and hence controlling the particles in plasma wall transition region especially in cases of two-ion species magnetized plasma sheath.