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On revisited models of L-H transition for tokamak plasmas

M. NEGREA1,* , I. PETRISOR1, B. WEYSSOW2

Affiliation

  1. Department of Physics, University of Craiova, 13 A.I. Cuza Street, 200585 Craiova, Dolj, Association EURATOM-MEdC, Romania
  2. bDepartment of Statistical Physics and Plasma, Association Euratom-Etat Belge, Université Libre de Bruxelles, Belgium

Abstract

Models corresponding to L/H transition in tokamak plasmas are revisited. Values for the thickness of the meso-phase and for the range of the control parameter in the bifurcation region are obtained. We shown that in the collisional case the double hysteresis is absent when the control parameter is positive and there are critical values of the effective frequency and electron diffusivity for the existence of a simple bifurcation. The influence of the impurity flux on the radial electric field bifurcation and the time behaviour of the later on the basis of a tangent hyperbolic time-dependent ion temperature were also studied..

Keywords

L-H transition, Bifurcation, Radial electric field.

Submitted at: Aug. 21, 2025
Accepted at: July 10, 2008

Citation

M. NEGREA, I. PETRISOR, B. WEYSSOW, On revisited models of L-H transition for tokamak plasmas, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 8, pp. 1946-1949 (2008)