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TJ-II:Turbulence: Difference between revisions
→Self-similarity
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=== Self-similarity === | === Self-similarity === | ||
Important transport phenomena such as profile stiffness (consistency), | Important transport phenomena such as [[Profile consistency|profile stiffness (consistency)]], | ||
<ref>[http://www.jspf.or.jp/PFR/PFR_articles/pfr2008S1/pfr2008_03-S1070.html B.Ph. van Milligen et al, ''Quantifying profile stiffness'', Plasma and Fusion Research, '''3''' (2008) S1070]</ref> | <ref>[http://www.jspf.or.jp/PFR/PFR_articles/pfr2008S1/pfr2008_03-S1070.html B.Ph. van Milligen et al, ''Quantifying profile stiffness'', Plasma and Fusion Research, '''3''' (2008) S1070]</ref> | ||
power degradation, the rapid propagation of perturbations, | power degradation, the rapid propagation of perturbations, | ||
<ref>[http://dx.doi.org/10.1088/0029-5515/47/3/004 B.Ph. van Milligen et al, ''Pulse propagation in a simple probabilistic transport model'', Nucl. Fusion '''47''' (2007) 189]</ref> | <ref>[http://dx.doi.org/10.1088/0029-5515/47/3/004 B.Ph. van Milligen et al, ''Pulse propagation in a simple probabilistic transport model'', Nucl. Fusion '''47''' (2007) 189]</ref> | ||
and the Bohm scaling of plasma confinement might be explained on the basis of profile self-regulation in the framework of the [[Self-Organised Criticality]] paradigm. This paradigm predicts that transport is regulated by avalanches, which would generate self-similar behaviour in space and time of the turbulent data. | and the Bohm [[Scaling law|scaling]] of plasma confinement might be explained on the basis of profile self-regulation in the framework of the [[Self-Organised Criticality]] paradigm. This paradigm predicts that transport is regulated by avalanches, which would generate self-similar behaviour in space and time of the turbulent data. | ||
In order to test this hypothesis, one can determine the shape of the autocorrelation function (ACF) of turbulent signals. | In order to test this hypothesis, one can determine the shape of the autocorrelation function (ACF) of turbulent signals. | ||