### 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 language | English |
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Journal | Physical Review Letters |

Volume | 89 |

Issue number | 21 |

DOIs | |

Publication status | Published - Jan 1 2002 |

### All Science Journal Classification (ASJC) codes

- Physics and Astronomy(all)

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## Cite this

*Physical Review Letters*,

*89*(21). https://doi.org/10.1103/PhysRevLett.89.215001