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LNF:Plasma Physics: Difference between revisions
→Neoclassical transport in stellarators and design optimization
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''Challenges and opportunities'' | ''Challenges and opportunities'' | ||
Stellarator inter-machine studies<ref>A. Dinklage et al., [[doi:10.1088/0029-5515/53/6/063022|Nucl. Fusion '''53''' (2013) 063022]]</ref> have shown that ion energy transport significantly affects energy confinement at medium-to-high densities (<math>n_e > 4 | Stellarator inter-machine studies<ref>A. Dinklage et al., [[doi:10.1088/0029-5515/53/6/063022|Nucl. Fusion '''53''' (2013) 063022]]</ref> have shown that ion energy transport significantly affects energy confinement at medium-to-high densities (<math>n_e > 4 \cdot 10^{19} m^{-3}</math>). | ||
Since neoclassical transport in three-dimensional devices shows unfavourable temperature scaling, it becomes more important as the temperature is increased and the validation of local neoclassical theory at reactor-relevant conditions is needed. Extensions of the standard neoclassical theory are necessary for a better assessment of collisional transport in a stellarator reactor concept, such as non-local and non flux-surface based calculations. | Since neoclassical transport in three-dimensional devices shows unfavourable temperature scaling, it becomes more important as the temperature is increased and the validation of local neoclassical theory at reactor-relevant conditions is needed. Extensions of the standard neoclassical theory are necessary for a better assessment of collisional transport in a stellarator reactor concept, such as non-local and non flux-surface based calculations. | ||