Deuterium Atomic and Molecular Radiation in DIII-D high-recycling divertor plasmas

ORAL

Abstract

EIRENE predictions of emission from the deuterium Lyman series and molecular bands in DIII-D high-recycling divertor plasmas show that Lyman-a emission is approximately an order of magnitude stronger than the Lyman-Werner molecular bands, indicating that emission from molecules plays a secondary role in the divertor radiation power balance. The underlying deuterium-carbon plasma, calculated by EDGE2D-EIRENE and serving as the basis for this assessment, electron temperatures of 1 eV at the low-field target plate are predicted as measured. The simulations, however, under-predict the measured electron density by a factor of 2 to 3, and thus the atomic and molecular densities. The impact of the magnitudes and spatial distributions of the plasma profiles on divertor deuterium emission is discussed.

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Presenters

  • Mathias Groth

    Aalto University, Espoo, Finland, Aalto University, Aalto University, Finland

Authors

  • Mathias Groth

    Aalto University, Espoo, Finland, Aalto University, Aalto University, Finland

  • Steven L Allen

    Lawrence Livermore National Lab, Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory, USA

  • Petra Boerner

    Forschungszentrum Juelich, Germany

  • Sebastijan Brezinsek

    Forschungszentrum Juelich, Germany

  • I. Bykov

    University of California, San Diego, USA, UCSD

  • Gerard Corrigan

    Culham Centre for Fusion Energy, UK

  • Max E Fenstermacher

    Lawrence Livermore Natl Lab, Lawrence Livermore National Lab, Lawrence Livermore National Laboratory, USA

  • Aaro E Jaervinen

    Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory, LLNL, Lawrence Livermore National Laboratory, USA

  • Derek Harting

    CCFE, Culham Science Centre, Abingdon, Oxon, OX14 3DB, UK, Culham Centre for Fusion Energy, UK

  • Eric M Hollmann

    Univ of California - San Diego, University of California, San Diego, USA

  • Charles J Lasnier

    Lawrence Livermore National Laboratory, USA

  • Anthony W Leonard

    General Atomics - San Diego, General Atomics, USA, General Atomics

  • Bartosz Lomanowski

    Aalto University, Finland

  • Adam McLean

    Lawrence Livermore National Lab, LLNL, Lawrence Livermore Natl Lab, Lawrence Livermore National Laboratory, USA

  • Detlev Reiter

    Forschungszentrum Juelich, Germany

  • Cameron M Samuell

    Lawrence Livermore Natl Lab, LLNL, Lawrence Livermore National Laboratory, USA

  • Morgan W. Shafer

    Oak Ridge National Laboratory, Oak Ridge National Laboratory, USA

  • Huiqian Wang

    Oak Ridge Associated Universities, General Atomics - San Diego, Oak Ridge Associated University, ORAU, Oak Ridge, TN, USA, Oak Ridge Associated Universities, USA, Oak Ridge Associated Universities, USA, General Atomics

  • Jonathan Watkins

    Sandia National Laboratory, Sandia Natl Labs, Sandia National Laboratories, Sandia National Lab, General Atomics - San Diego, SNL, Sandia National Laboratory, USA

  • Sven Wiesen

    Forschungszentrum Juelich, Germany

  • Robert Wilcox

    Oak Ridge National Laboratory, ORNL, Oak Ridge National Laboratory, USA