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The quasilinear diffusion coefficient deviates significantly from the lowest order Larmor radius scaling D ?v{2n}. 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 quasilinear diffusion coefficient becomes discontinuous.A new Monte Carlo scheme has been developed to treat problems with discontinuous diffusion coefficients.

Additional information

Authors: JOHNSON T, KTH Association Euratom/VR, Stockholm (SE);HELLSTEN T, KTH Association Euratom/VR, Stockholm (SE);ERIKSSON L-G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: Sixteenth Topical Conference on Radio Frequency Power in Plasmas Organised by: Plasma Science & Fusion Center, Cambridge (US) Held at: Park City, Utah USA
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail:
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