Robustness of radiative mantle plasma power exhaust solutions for ITER

Abstract

The robustness of impurity seeded radiative mantle plasma power exhaust solutions for the ITER ignited operating point to uncertainties in the energy and impurity transport and in several physics and operating parameters is examined. Our results indicate that ~70 to 95% of the input power can be radiated from inside the separatrix with neon, argon or krypton injection, without significant detriment to the core power balance or collapse of the radial temperature profile, for a wide range of values of the impurity pinch velocity, the edge temperature pedestal and the plasma density, and for a variety of different energy and impurity transport models. Auxiliary power is used to compensate for central radiative losses. Similar radiative power exhaust solutions are identified for a possible ignited ITER operating point at the Greenwald density limit