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FOXTAIL: Modeling the nonlinear interaction between Alfven eigenmodes and energetic particles in tokamaks
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-3262-1958
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.ORCID iD: 0000-0002-7142-7103
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
2017 (English)In: Computer Physics Communications, ISSN 0010-4655, E-ISSN 1879-2944, Vol. 214, p. 39-51Article in journal (Refereed) Published
Abstract [en]

FOXTAIL is a new hybrid magnetohydrodynamic-kinetic code used to describe interactions between energetic particles and Alfven eigenmodes in tokamaks with realistic geometries. The code Simulates the nonlinear dynamics of the amplitudes of individual eigenmodes and of a set of discrete markers in five dimensional phase space representing the energetic particle distribution. Action angle coordinates of the equilibrium system are used for efficient tracing of energetic particles, and the particle acceleration by the wave fields of the eigenmodes is Fourier decomposed in the same angles. The eigenmodes are described using temporally constant eigenfunctions with dynamic complex amplitudes. Possible applications of the code are presented, e.g., making a quantitative validity evaluation of the one-dimensional bump-on-tail approximation of the system. Expected effects of the fulfillment of the Chirikov criterion in two-mode scenarios have also been verified.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2017. Vol. 214, p. 39-51
Keywords [en]
Magnetohydrodynamic waves, Tokamaks, Fast particle effects, Nonlinear dynamics
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-205427DOI: 10.1016/j.cpc.2017.01.007ISI: 000397358400005Scopus ID: 2-s2.0-85011005108OAI: oai:DiVA.org:kth-205427DiVA, id: diva2:1097220
Funder
Swedish Research Council, 621-2011-5387
Note

QC 20170522

Available from: 2017-05-22 Created: 2017-05-22 Last updated: 2017-06-08Bibliographically approved

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Tholerus, EmmiJohnson, ThomasHellsten, Torbjörn

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