Probability of Statistical [Formula presented] Transition in Tokamaks

Sanae I. Itoh, Kimitaka Itoh, Shinichiro Toda

Research output: Contribution to journalArticle

Abstract

A statistical model for the bifurcation of the radial electric field [Formula presented] is analyzed in view of describing [Formula presented] transitions of tokamak plasmas. Noise in microfluctuations is shown to lead to random changes of [Formula presented] if a deterministic approach allows for more than one solution. The probability density function for and the ensemble average of [Formula presented] are obtained. The [Formula presented]-to-[Formula presented] and the [Formula presented]-to-[Formula presented] transition probabilities are calculated, and the effective phase limit is derived. Because of the suppression of turbulence by shear in [Formula presented], the limit deviates from Maxwell’s rule.

Original languageEnglish
JournalPhysical Review Letters
Volume89
Issue number21
DOIs
Publication statusPublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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