“…For instance, diffusion can be responsible for the formation of chemical inhomogeneities which influence emission, heat transport, conductivity, etc see, e.g., [1][2][3]. In fusion experiments, the source of trace elements is usually the chamber walls, and diffusion determines the penetration depth of these elements and their distribution in plasma see, e.g., [4][5][6]. Even a small admixture of heavy ions increases drastically radiative losses of plasma and changes its thermal properties.…”