Effects of impurity ions on plasma boundary parameters
A one-dimensional fluid model is used to investigate the effect of the interaction between the plasma containing impurity ions and the wall material on the boundary plasma parameters.The effects of electrons pro-duced by thermal emission at different wall temperatures on the plasma wall potential,electric field,thermal e-mission electron flux and ion kinetic energy fluxes to the wall are studied by numerical simulation.It is found that when the surface temperature of plasma facing materials increases,the wall potential and heat emission flux will increase,the wall electric field and the kinetic energy fluxes to the wall will decrease.The influence of tungsten as the wall material on the plasma boundary parameters is more obvious than that of carbon as the wall material.In addition,the effect of carbon impurity ions(concentration and charge number)on the plasma wall parameters is studied when tungsten is used as the wall material.
万方数据
维普
