Comparison of theory-based and semi-empirical transport modelling in JET plasmas with ITBs

Tuomas Tala, V. Parail, A. Becoulet, G. Corrigan, D. Heading, Mervi Mantsinen, P. Strand

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Abstract

The theory-based Weiland transport model has been applied to JET discharges with internal transport barriers (ITBs) for the first time. The agreement of the modelling results with the experiments has been found to be comparable with the agreement of the modelling results produced by the semi-empirical Bohm/gyro-Bohm transport model. Weiland model overestimates the width of the ITB and the electron temperature. There is evidence that the density gradient in the Weiland model plays a more important role in governing the ITB formation dynamics for JET discharges than the suppression of turbulence by the E*B flow shearing rate.
Original languageEnglish
Pages (from-to)A495-A500
JournalPlasma Physics and Controlled Fusion
Volume44
Issue number5A
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

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Keywords

  • JET
  • plasma
  • internal transport barriers
  • fusion energy
  • fusion reactors

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