Multi‐Code Ab Initio Calculation of Ionization Distributions and Radiation Losses for Tungsten in Tokamak Plasmas

We present calculations of ionization balance and radiative power losses for tungsten in magnetic fusion plasmas. The simulations were performed within the framework of Non‐Local Thermodynamic Equilibrium (NLTE) Code Comparison Workshops utilizing several independent collisional‐radiative models. The calculations generally agree with each other; however, a clear disagreement with experimental ionization distributions at low temperatures 2 keVmagnetic confinement fusion.