Comprehensive experimental turbulence measurements for scale-resolved multichannel gyrokinetic code validation

ORAL

Abstract

Turbulence is the main driver of heat transport which deteriorates the performance of fusion reactors. To design turbulence optimised devices, simulation codes need to be validated by experiments. Validation work has already been done for a single or a small number of turbulence parameters, showing agreement but also highlighting areas where disagreement helps point to new physics discoveries.

The comprehensive set of experimental turbulence data presented in this contributionis measured on ASDEX Upgrade in the same radial region and for two different plasma scenarios. It includes wavenumber spectra, density and temperature fluctuation amplitudes and radial correlation lengths, the poloidal dependence of the velocity perpendicular to themagnetic field as well as the cross phase between density and temperature fluctuations.

These quantities are measured for comprehensive code validation by Doppler reflectometers in both X-mode and O-mode polarization and an electron cyclotron emission radiometer. For this contribution they are compared to the gyrokinetic code GENE because of its mature capabilities to assess and reproduce core turbulence. In addition synthetic diagnostic modeling will be included to account for diagnostic effects on measurements.

*This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-2020 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.This work is supported by the US DoE under grants DE-SC0014264, DE-SC0006419, and DE-SC0017381

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Presenters

  • Klara Höfler

    • Physik Department E28, Technische Universität München, Garching, Germany, Max-Planck-Institut für Plasmaphysik, Garching, Germany

Authors

  • Klara Höfler

    • Physik Department E28, Technische Universität München, Garching, Germany, Max-Planck-Institut für Plasmaphysik, Garching, Germany

  • Tobias Görler

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics

  • Tim Happel

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics, Garching, Germany
    • Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany

  • Pascale Hennequin

    • Laboratoire de Physique des Plasmas, Ecole Polytechnique, Palaiseau, France
    • LPP, Ecole Polytechnique, Palaiseau, France

  • Pedro A Molina Cabrera

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics
    • Massachusetts Institute of Technology MIT

  • Michael G Bergmann

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany

  • Rachel Bielajew

    • Massachusetts Institute of Technology MIT, Cambride, USA
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MI

  • Garrard D Conway

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics, Garching, Germany
    • Max Planck Institute for Plasma Physics

  • Pierre David

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany

  • Rainer Fischer

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics, Garching, Germany

  • Antonia Frank

    • Physik Department E28, Technische Universität München, Garching, Germany, Max-Planck-Institut für Plasmaphysik, Garching, Germany

  • Carsten Lechte

    • Institut für Grenzflächenverfahrenstechnik und Plasmatechnologie, Stuttgart, Germany

  • Rachael M McDermott

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics, Garching, Germany
    • Max Planck Institute for Plasma Physics

  • Philip A Schneider

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics, Garching, Germany
    • Max Planck Institute for Plasma Physics

  • Ulrich Stroth

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany, Physik Department E28, Technische Universität München, Garching, Germany
    • Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany

  • Anne E White

    • Massachusetts Institute of Technology MIT, Cambride, USA
    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MI
    • MIT PSFC

  • the ASDEX Upgrade Team

    • Max-Planck-Institut für Plasmaphysik, Garching, Germany
    • Max Planck Institute for Plasma Physics