A three-dimensional, electromagnetic, fluid code with flux boundaries conditions is used to study the scaling of electron thermal transport caused by electron temperature gradient-driven (ETG) turbulence. It is found that close to the ETG threshold, the thermal transport depends weakly on β, which differs from the heuristic formula χe∝1/β. It is shown also that electron thermal losses scale like gyro-Bohm. The observed electron temperature profiles appear more resilient than the ion temperature profiles obtained from previous ITG simulations in similar conditions.
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Labit et al. (2002) studied this question.
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