Validating the ASCOT modelling of NBI fast ions in Wendelstein 7-X stellarator

Tutkimustuotos: Lehtiartikkelivertaisarvioitu



  • Max Planck Inst Plasma Phys, Max Planck Society, Teilinst Greifswald
  • Forschungszentrum Julich, Helmholtz Association, Research Center Julich, IEK 4
  • Max Planck Inst Mol Physiol, Max Planck Society
  • Max Planck Inst Plasma Phys, Max Planck Society
  • Natl Inst Fus Sci, National Institute for Fusion Science (NIFS) - Japan, National Institutes of Natural Sciences (NINS) - Japan
  • TEC Partner, Lab Plasma Phys, LPP ERM KMS
  • Princeton Plasma Phys Lab, Princeton Physics Laboratory, Princeton University, United States Department of Energy (DOE)
  • Univ Cagliari, University of Cagliari, Dept Elect & Elect Engn
  • Auburn Univ, Auburn University System, Auburn University, Dept Chem Engn
  • Univ Szczecin, University of Szczecin
  • LANL, United States Department of Energy (DOE), Los Alamos National Laboratory
  • Max-Planck-Institut für Plasmaphysik


The first fast ion experiments in Wendelstein 7-X were performed in 2018. They are one of the first steps in demonstrating the optimised fast ion confinement of the stellarator. The fast ions were produced with a neutral beam injection (NBI) system and detected with infrared cameras (IR), a fast ion loss detector (FILD), fast ion charge exchange spectroscopy (FIDA), and post-mortem analysis of plasma facing components.

The fast ion distribution function in the plasma and at the wall is being modelled with the ASCOT suite of codes. They calculate the ionisation of the injected neutrals and the consecutive slowing down process of the fast ions. The primary output of the code is the multidimensional fast ion distribution function within the plasma and the distribution of particle hit locations and velocities on the wall. Synthetic measurements based on ASCOT output are compared to experimental results to assess the validity of the modelling.

This contribution presents an overview of the various fast ion measurements in 2018 and the current modelling status. The validation and data-analysis is on-going, but the wall load IR modelling already yield results that match with the experiments.


JulkaisuJournal of Instrumentation
TilaJulkaistu - lokakuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu
TapahtumaEuropean Conference on Plasma Diagnostics - Lisbon, Portugali
Kesto: 6 toukokuuta 201910 toukokuuta 2019
Konferenssinumero: 3

ID: 40240353