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MeV-range velocity-space tomography from gamma-ray and neutron emission spectrometry measurements at JET

  • Author(s): Salewski, M
  • Nocente, M
  • Jacobsen, AS
  • Binda, F
  • Cazzaniga, C
  • Ericsson, G
  • Eriksson, J
  • Gorini, G
  • Hellesen, C
  • Hjalmarsson, A
  • Kiptily, VG
  • Koskela, T
  • Korsholm, SB
  • Kurki-Suonio, T
  • Leipold, F
  • Madsen, J
  • Moseev, D
  • Nielsen, SK
  • Rasmussen, J
  • Schneider, M
  • Sharapov, SE
  • Stejner, M
  • Tardocchi, M
  • et al.

Published Web Location

http://www.euro-fusionscipub.org/wp-content/uploads/WPJET1PR16_16716_submitted.pdf
No data is associated with this publication.
Abstract

© 2017 Technical University of Denmark. We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spectrometers and a high-resolution γ-ray spectrometer detecting the γ-rays released in two reactions. The tomographic inversion based on these five spectra is in excellent agreement with numerical simulations with the ASCOT-RFOF and the SPOT-RFOF codes. The length of the measured fast-ion tail corroborates the prediction that very few particles are accelerated above 2 MeV due to the weak wave-particle interaction at higher energies.

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