Long-Range Time Correlations in Plasma Edge Turbulence

Journal Article · Fri May 01 00:00:00 EDT 1998 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.80.4438· OSTI ID:604440

Carreras, B A; Newman, D E ^[1]; van Milligen, B; Pedrosa, M A; Balbin, R; Hidalgo, C; Sanchez, E; Frances, M; Garcia-Cortes, I ^[2]; Bleuel, J; Endler, M ^[3]; Davies, S; Matthews, G F ^[4]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8070 (United States)
2. Asociacion Euratom-Ciemat, 28040 Madrid (Spain)
3. Max-Planck-Institut fuer Plasmaphysik, Euratom Association, 85740 Garching (Germany)
4. JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (United Kingdom)

Analysis of the edge plasma fluctuation in several confinement devices reveals the self-similar character of the fluctuations through the presence of long-range time correlations. These results show that the tail of the autocorrelation function decays as a power law for time lags longer than the decorrelation time and as long as times on the order of the particle diffusion time. The algebraic decay of the long-range time correlations is consistent with plasma transport characterized by self-organized criticality. {copyright} {ital 1998} {ital The American Physical Society}

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 604440
• Journal Information: Physical Review Letters, Vol. 80, Issue 20; Other Information: PBD: May 1998
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
TURBULENCE
PLASMA CONFINEMENT
FLUCTUATIONS
TRANSPORT
TIME DEPENDENCE
CORRELATION FUNCTIONS
DIFFUSION