Physics of transport in tokamaks

X. Garbet, P. Mantica, C. Angioni, E. Asp, Y. Baranov, C. Bourdelle, R. Budny, F. Crisanti, G. Cordey, L. Garzotti, N. Kirneva, D. Hogeweij, T. Hoang, F. Imbeaux, E. Joffrin, X. Litaudon, A. Manini, D.C. McDonald, H. Nordman, V. ParailA. Peeters, F. Ryter, C. Sozzi, M. Valovic, Tuomas Tala, A. Thyagaraja, I. Voitsekhovitch, J. Weiland, H. Weisen, A. Zabolotsky, JET-EFDA Contributors

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    Abstract

    This paper is an overview of recent results relating to turbulent particle and heat transport, and to the triggering of internal transport barriers (ITBs). The dependence of the turbulent particle pinch velocity on plasma parameters has been clarified and compared with experiment. Magnetic shear and collisionality are found to play a central role. Analysis of heat transport has made progress along two directions: dimensionless scaling laws, which are found to agree with the prediction for electrostatic turbulence, and analysis of modulation experiments, which provide a stringent test of transport models. Finally the formation of ITBs has been addressed by analysing electron transport barriers. It is confirmed that negative magnetic shear, combined with the Shafranov shift, is a robust stabilizing mechanism. However, some well established features of internal barriers are not explained by theory.
    Original languageEnglish
    Pages (from-to)B557 - B574
    Number of pages18
    JournalPlasma Physics and Controlled Fusion
    Volume46
    Issue number12B
    DOIs
    Publication statusPublished - 2004
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • JET
    • plasma
    • fusion energy
    • fusion reactors
    • tokamak
    • internal transport barriers
    • magnetic shear

    Cite this

    Garbet, X., Mantica, P., Angioni, C., Asp, E., Baranov, Y., Bourdelle, C., Budny, R., Crisanti, F., Cordey, G., Garzotti, L., Kirneva, N., Hogeweij, D., Hoang, T., Imbeaux, F., Joffrin, E., Litaudon, X., Manini, A., McDonald, D. C., Nordman, H., ... JET-EFDA Contributors (2004). Physics of transport in tokamaks. Plasma Physics and Controlled Fusion, 46(12B), B557 - B574. https://doi.org/10.1088/0741-3335/46/12B/045