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The observation of internal transport barriers (ITBs) in which ion thermal diffusivity is reduced to a neoclassical level has been made for the first time in tokamak plasmas fueled with deuterium and tritium ions using a broad current density profile. The heating and current profiles required to obtain an ITB are similar in D-T and D-D plasmas. Central ion temperatures of 40 keV and plasma pressure gradients of 10^6Pa/m were observed in a D-T plasma, leading to a fusion triple product n₈T₈₄{0ex{0ex}=0ex{0ex}1. 10}^21m^-3keVs and 8. 2 MW of fusion power. There is potential for further optimization as a step towards the development of efficient tokamak fusion reactors.
Gormezano et al. (Mon,) studied this question.
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