A model realization of self-organized criticality for plasma confinement
- 1 August 1996
- journal article
- Published by AIP Publishing in Physics of Plasmas
- Vol. 3 (8) , 2903-2911
- https://doi.org/10.1063/1.871650
Abstract
A model for plasma transport near marginal stability is presented. The model is based on subcri‐ tical resistive pressure‐gradient‐driven turbulence. Three‐dimensional nonlinear calculations based on this model show effective transport for subcritical mean profiles. This model exhibits some of the characteristic properties of self‐organized criticality. Perturbative transport techniques are used to elucidate the transport properties. Propagation of positive and negative pulses is studied. The observed results suggest a possible explanation of the apparent nonlocal effects ob‐ served with perturbative experiments in tokamaks.Keywords
This publication has 20 references indexed in Scilit:
- Punctuated equilibrium and criticality in a simple model of evolutionPhysical Review Letters, 1993
- Nondimensional transport scaling in the Tokamak Fusion Test Reactor: Is tokamak transport Bohm or gyro-Bohm?Physics of Fluids B: Plasma Physics, 1993
- Fluctuation measurements in the plasma interior on TFTRPlasma Physics and Controlled Fusion, 1992
- Self-organized critical forest-fire modelPhysical Review Letters, 1992
- Avalanches, hydrodynamics, and discharge events in models of sandpilesPhysical Review A, 1992
- Patterns of seismic activity preceding large earthquakesJournal of Geophysical Research, 1992
- Fluctuations and anomalous transport in tokamaksPhysics of Fluids B: Plasma Physics, 1990
- Scaling and universality in avalanchesPhysical Review A, 1989
- Self-organized criticalityPhysical Review A, 1988
- Self-organized criticality: An explanation of the 1/fnoisePhysical Review Letters, 1987