Simulation of Dynamic Characteristics of Beryllium, Carbon, and Tungsten Dust in the Edge Fusion Plasma

In this paper, the dynamics and lifetime of beryllium, carbon, and tungsten dust particles formed on the edge of fusion plasma are considered. To describe the dynamics of the dust particle, the equations of motion, the equations of mass and energy balance, and the equations for the dust particle charge are solved. Calculations take into account the parameters describing the material functions, such as molar enthalpy, saturated vapor pressure, complex phenomena in the dust interaction with plasma leading to mass loss, and properties of electron emission and radiation. Calculations of the charging and the lifetime of Be, C, and W dust particles in the presence of the magnetic field are analyzed. Equilibrium temperatures of Be, C, and W dust particles for typical edge fusion plasma parameters are obtained. It is found that the maximum effect of the magnetic field on the charge and on the dust lifetime is for tungsten dust in comparison with other considered dust materials.