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Analysis of a quasilinear model for ion-cyclotron interactions in tokamaks
KTH, School of Electrical Engineering (EES), Fusion Plasma Physics.
2005 (English)In: Radio Frequency Power in Plasmas / [ed] Wukitch, SJ; Bonoli, PT, MELVILLE: AMER INST PHYSICS , 2005, Vol. 787, 54-57 p.Conference paper (Refereed)
Abstract [en]

The quasilinear diffusion coefficient deviates significantly from the lowest order Larmor radius scaling D proportional to nu(2n)(perpendicular to). This is not only caused by the finite Larmor radius effects, but also by the inhomogeneous electric field polarisation and the changes of the guiding centre orbits. The regions with strong interaction and the boundaries for resonant interaction are identified. At these boundaries the quasi linear diffusion coefficient becomes discontinuous. Anew Monte Carlo scheme has been developed to treat problems with discontinuous diffusion coefficients.

Place, publisher, year, edition, pages
MELVILLE: AMER INST PHYSICS , 2005. Vol. 787, 54-57 p.
Keyword [en]
quasilinear diffusion, resonance condition, Monte Carlo methods
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-43189DOI: 10.1063/1.2098195ISI: 000232634700009ScopusID: 2-s2.0-33749662686ISBN: 0-7354-0276-0OAI: diva2:448063
16th Topical Conference on Radio Frequency Power in Plasmas. Park City, UT. APR 11-13, 2005
QC 20111014Available from: 2011-10-14 Created: 2011-10-13 Last updated: 2011-10-14Bibliographically approved

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Hellsten, Torbjörn
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