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TJ-II:Turbulence: Difference between revisions
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Transport in fusion-grade plasmas is often dominated by turbulent transport. | Transport in fusion-grade plasmas is often dominated by turbulent transport. | ||
In contrast with [[Neoclassical transport]], turbulent transport (assumed to be the cause of the experimental so-called "anomalous" component of transport) is not well understood. | In contrast with [[Neoclassical transport]], turbulent transport (assumed to be the cause of the experimental so-called "[[Anomalous transport|anomalous]]" component of transport) is not well understood. | ||
As a consequence, predictions of machine performance generally rely on rather crude [[Scaling law|scaling law techniques]], rather than first-principles calculations. | As a consequence, predictions of machine performance generally rely on rather crude [[Scaling law|scaling law techniques]], rather than first-principles calculations. | ||
Improving our understanding of turbulence is hard, due to (1) the complexity of fusion-grade plasmas (the presence of charged particles and magnetic fields make this into a much harder topic than fluid turbulence), (2) the enormous variety of plasma instabilities, and (3) the difficulty of diagnosing the plasma due to the hostile conditions inside the plasma. | Improving our understanding of turbulence is hard, due to (1) the complexity of fusion-grade plasmas (the presence of charged particles and magnetic fields make this into a much harder topic than fluid turbulence), (2) the enormous variety of plasma instabilities, and (3) the difficulty of diagnosing the plasma due to the hostile conditions inside the plasma. | ||