Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments

M. Schneider, T. Johnson, R. Dumont, J. Eriksson, L. G. Eriksson, L. Giacomelli, J. B. Girardo, T. Hellsten, E. Khilkevitch, V. G. Kiptily, T. Koskela, M. Mantsinen, M. Nocente, M. Salewski, S. E. Sharapov, A. E. Shevelev

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

Abstract

Recent JET experiments have been dedicated to the studies of fusion reactions between deuterium (D) and Helium-3 (3He) ions using neutral beam injection (NBI) in synergy with third harmonic ion cyclotron radio-frequency heating (ICRH) of the beam. This scenario generates a fast ion deuterium tail enhancing DD and D3He fusion reactions. Modelling and measuring the fast deuterium tail accurately is essential for quantifying the fusion products. This paper presents the modelling of the D distribution function resulting from the NBI+ICRF heating scheme, reinforced by a comparison with dedicated JET fast ion diagnostics, showing an overall good agreement. Finally, a sawtooth activity for these experiments has been observed and interpreted using SPOT/RFOF simulations in the framework of Porcelli's theoretical model, where NBI+ICRH accelerated ions are found to have a strong stabilizing effect, leading to monster sawteeth.

Original languageEnglish
Article number112022
JournalNuclear Fusion
Volume56
Issue number11
DOIs
Publication statusPublished - 24 Aug 2016
MoE publication typeA1 Journal article-refereed

Keywords

  • fast ions
  • gamma spectroscopy
  • ICRH
  • integrated modeling
  • neutron spectroscopy
  • synthetic diagnostics
  • tokamak

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