Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas

H. Weisen*, Y. Camenen, A. Salmi, T. W. Versloot, P. C. De Vries, M. Maslov, T. Tala, M. Beurskens, C. Giroud

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)

Abstract

A broad survey of the experimental database of neutral beam heated plasmas in the JET tokamak has established the theoretically expected ubiquity, in rotating plasmas, of a convective transport mechanism which has its origin in the vertical particle drift resulting from the Coriolis force. This inward convection, or pinch, leads to inward transport of toroidal angular momentum and is characterized by pinch numbers RV/χ, which rise from near unity at r/a ≈ 0.25 to around 5 at r/a ≈ 0.85. Linear gyrokinetic calculations of the Coriolis pinch number and the Prandtl number χ/χ i are in good agreement with the experimental observations, with similar dependences on plasma parameters. The data, however, do not rule out contributions from different processes, such as residual stresses.

Original languageEnglish
Article number042001
JournalNuclear Fusion
Volume52
Issue number4
DOIs
Publication statusPublished - Apr 2012
MoE publication typeA1 Journal article-refereed

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