Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

Dmitry Moseev, Fernando Meo, Søren Bang Korsholm, T Koskela, M Albergante, O Asunta, Henrik Bindslev, A Bürger, Vedran Furtula, M Yu Kantor, Frank Leipold, Poul Michelsen, Stefan Kragh Nielsen, Mirko Salewski, O Schmitz, Morten Stejner Pedersen, E Westerhof

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    Abstract

    Here we demonstrate a comprehensive comparison of collective Thomson scattering (CTS) measurements with steady-state Monte Carlo simulations performed with the ASCOT and VENUS codes. The measurements were taken at a location on the magnetic axis as well as at an off-axis location, using two projection directions at each location. The simulations agree with the measurements on-axis, but for the off-axis geometries discrepancies are observed for both projection directions. For the near perpendicular projection direction with respect to the magnetic field, the discrepancies between measurement and simulations can be explained by uncertainty in plasma parameters. However, the discrepancies between measurement and simulations for the more parallel projection direction cannot be explained solely by uncertainties in plasma parameters. Here anomalous fast ion transport is a possible explanation for the discrepancy.

    Original languageEnglish
    JournalPlasma Physics and Controlled Fusion
    Volume53
    Issue number10
    Pages (from-to)105004
    ISSN0741-3335
    DOIs
    Publication statusPublished - 2011

    Keywords

    • Fusion energy

    Cite this

    Moseev, D., Meo, F., Korsholm, S. B., Koskela, T., Albergante, M., Asunta, O., Bindslev, H., Bürger, A., Furtula, V., Kantor, M. Y., Leipold, F., Michelsen, P., Nielsen, S. K., Salewski, M., Schmitz, O., Stejner Pedersen, M., & Westerhof, E. (2011). Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak. Plasma Physics and Controlled Fusion, 53(10), 105004. https://doi.org/10.1088/0741-3335/53/10/105004