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To better understand long time transport dynamics, techniques to investigate long-range dependences in plasma fluctuations have been applied to data from several confinement devices including tokamaks, stellarators, and reversed field pinch. The results reveal the self-similar character of the edge plasma fluctuations. This implies that the tail of the autocorrelation function decays as a power law and suggests that there is a superdiffusive component of the anomalous transport. Rescaled fluctuation and turbulent flux spectra from different devices also show a strong similarity. For a range of parameters corresponding to the tokamak ohmic regime and equivalent power for other devices, the spectral decay index may show a universal character.
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| Authors: |
Carreras, B.A.;
van Milligen, B.P.;
Pedrosa, M.A.;
Balbin, R.;
Hidalgo, C.;
Newman, D.E.;
Sanchez, E.;
Bravenec, R.;
McKee, G.;
Garcia-Cortes, I.;
Bleuel, J.;
Endler, M.;
Ricardi, C.;
Davies, S.;
Matthews, G.F.;
Martines, E.;
Antoni, V. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8070 (United States)]
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| Publication Date: | 1999 May 01 |
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| OSTI Identifier: | 344914 |
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| Report Number(s): | CONF-981127-- |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Physics of Plasmas; Journal Volume: 6; Journal Issue: 5; Conference: 40. annual physics of plasmas meeting, APS Division of Plasma Physics, New Orleans, LA (United States), 16-20 Nov 1998; Other Information: PBD: May 1999 |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: pp. 1885-1892 |
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| Other Number(s): | Journal ID: PHPAEN; ISSN 1070-664X; TRN: 99:005507 |
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| Subject: | 70 PLASMA PHYSICS AND FUSION; PLASMA DIAGNOSTICS; CORRELATIONS; FLUCTUATIONS; TOKAMAK DEVICES; STELLARATORS; REVERSED-FIELD PINCH DEVICES; CHARGED-PARTICLE TRANSPORT |
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| Update Date: | 2009 Dec 16 |
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