Bifurcation Paradigm A Short Summary of Discussion at the Workshop on 'Self-Organization and Transport in Electromagnetic Turbulence'

摘要

Recent experimental work on magnetic fusion devices has uncovered many examples of threshold phenomena where nonlinear relaxation process with following characteristic features are observed: Slow increase of a mean parameter followed by its sudden fall, in the form of a burst; Recovery from the burst in a short duration and recurrence of the burst cycle at an average frequency determined by the input source as the key controlling parameter; Probabilistic nature of time series with properties determined by 'distance' from threshold; frequent occurrence of 'precursor' which indicates the crash by sudden onset of a symmetry breaking perturbation called 'trigger mode'.