Marginal-stability calculation of electron temperature profiles in Tokamaks

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Electron Energy, Magnetohydrodynamic Stability, Plasma Temperature, Temperature Profiles, Tokamak Devices, Current Distribution, Magnetically Trapped Particles, Plasma Turbulence, Steady State, Toroidal Plasmas

Scientific paper

The paper presents a model for calculating electron temperature profiles in a Tokamak plasma on the basis of the assumption that the Tokamak temperature profile adjusts itself so that the dissipative trapped electron mode, assumed to be the dominant transport mechanism, is at marginal stability. The trapped electron instability is assumed to carry the energy from the interior to the edge. If the energy input at the center, energy outflow at the edge, and all other fluid properties of the plasma are known, then marginal stability calculations give the steady-state electron temperature and current profile. The turbulence level and the relation between anomalous transport coefficients can then be derived.

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