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Impact of realistic fast ion distribution function in gyrokinetic GENE simulations
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2017 (English)In: 44th EPS Conference on Plasma Physics, EPS 2017, European Physical Society (EPS) , 2017Conference paper, Published paper (Refereed)
Abstract [en]

Understanding the stabilising mechanism of fast particles on plasma turbulence is an essential task for a fusion reactor, where the energetic particles can constitute a significant fraction of the main ions. While the consideration of equivalent Maxwellian distributed fast ions in the simulations has greatly improved the agreement with experiments, fast ion electromagnetic stabilization seems to be somewhat over-estimated. Power balance is usually reached only with increased plasma gradients. However, it is well known that to rigorously model highly non thermalised particles, a non-Maxwellian background distribution function is needed. To this aim, a previous study on a particular JET plasma has been revised and analysed with the gyrokinetic code GENE. Fast particles have been modelled with a number of different analytic and numerical distributions. The latter have been imported from the modelling tools NEMO/SPOT and SELFO. 

Place, publisher, year, edition, pages
European Physical Society (EPS) , 2017.
Keywords [en]
Genes, Ions, Plasma turbulence, Energetic particles, Fast particle, Gyrokinetic codes, Gyrokinetics, Main ions, Modelling tools, Plasma gradients, Power balance, Distribution functions
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-246950Scopus ID: 2-s2.0-85055036155ISBN: 9781510849303 (print)OAI: oai:DiVA.org:kth-246950DiVA, id: diva2:1327361
Conference
44th European Physical Society Conference on Plasma Physics, EPS 2017, 26 June 2017 through 30 June 2017
Note

QC 20190619

Available from: 2019-06-19 Created: 2019-06-19 Last updated: 2019-06-19Bibliographically approved

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Johnson, Thomas

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