Experimental evidence of long-range correlations and self-similarity in plasma fluctuations
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.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
Journal ID: PHPAEN; ISSN 1070-664X; TRN: 99:005507
- Resource Type:
- Journal Article
- 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
- Country of Publication:
- United States
- 70 PLASMA PHYSICS AND FUSION; PLASMA DIAGNOSTICS; CORRELATIONS; FLUCTUATIONS; TOKAMAK DEVICES; STELLARATORS; REVERSED-FIELD PINCH DEVICES; CHARGED-PARTICLE TRANSPORT
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