Simulation of transition dynamics to high confinement in fusion plasmas

Anders Henry Nielsen, G. S. Xu, Jens Madsen, Volker Naulin, Jens Juul Rasmussen, B. N. Wan

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Abstract

The transition dynamics from the low (L) to the high (H) confinement mode in magnetically confined plasmas is investigated using a first-principles four-field fluid model. Numerical results are in agreement with measurements from the Experimental Advanced Superconducting Tokamak - EAST. Particularly, the slow transition with an intermediate dithering phase is well reproduced at proper parameters. The model recovers the power threshold for the L-H transition as well as the decrease in power threshold switching from single to double null configuration observed experimentally. The results are highly relevant for developing predictive models of the transition, essential for understanding and optimizing future fusion power reactors.
Original languageEnglish
JournalPhysics Letters A
Volume379
Issue number47-48
Pages (from-to)3097-3101
Number of pages5
ISSN0375-9601
DOIs
Publication statusPublished - 2015

Keywords

  • L-H transition
  • Fluid simulations
  • Braginskii equations
  • Turbulence and flows

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