Transition of Radial Electric Field in Helical Systems

Kimitaka Itoh, Heiji Sanuki, Shinichiro Toda, Masayuki Yokoyama, Sanae I. Itoh, Masatoshi Yagi, Atsushi Fukuyama

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Transition of radial electric field is investigated in helical plasmas for the given plasma fluxes. The density and temperature gradients are simultaneously determined together with radial electric field. The electric field shows a nature of bifurcation, if an anomalous particle transport exists in addition to the neoclassical particle flux. Based on the Maxwell's construction with respect to the work-done, the critical condition for the bifurcation is obtained. The existence of bifurcation is not affected by the anomalous energy flux. The gradients are found to be subject to bifurcation at high plasma fluxes regime. The transition to a better confinement is predicted. The presence of hard transition of the gradient and electric field indicates the existence of the electric domain interface, across which the discontinuous change of gradient takes place.

Original languageEnglish
Pages (from-to)1575-1584
Number of pages10
Journaljournal of the physical society of japan
Issue number6
Publication statusPublished - Jun 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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