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

doi:10.1088/0741-3335/44/5A/355

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

VTT Technical Research Centre of Finland

Research output: Contribution to journal › Article › Scientific › peer-review

18 Citations (Scopus)

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 language	English
Pages (from-to)	A495-A500
Journal	Plasma Physics and Controlled Fusion
Volume	44
Issue number	5A
DOIs	https://doi.org/10.1088/0741-3335/44/5A/355
Publication status	Published - 2002
MoE publication type	A1 Journal article-refereed

Keywords

JET
plasma
internal transport barriers
fusion energy
fusion reactors

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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.",

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AU - Tala, Tuomas

AU - Parail, V.

AU - Becoulet, A.

AU - Corrigan, G.

AU - Heading, D.

AU - Mantsinen, Mervi

AU - Strand, P.

PY - 2002

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AB - 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.

KW - JET

KW - plasma

KW - internal transport barriers

KW - fusion energy

KW - fusion reactors

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DO - 10.1088/0741-3335/44/5A/355

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SN - 0741-3335

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