A model collision operator for orbit averaged Monte Carlo codes
2006 (English)In: AIP Conf. Proc., 2006, 362-367 p.Conference paper (Refereed)
Modelling of fast ion populations, e.g. during ion cyclotron resonance heating, requires accurate treatment of both the fast ions and the thermal populations, while retaining the effects of wide guiding centre orbits. Often the ion-ion collisions are modelled as test particles colliding against a Maxwellian background. However, this type of operator generates a transport of thermal ions on the time scale of ion-ion collisions, and not on the ion-electron time scale as suggested by neoclassical theory. Various approaches have been made to correct this defect. Here we introduce a radial electric field so that the friction between the trapped and passing ions balances the diffusion due to ion-ion collisions.
Place, publisher, year, edition, pages
2006. 362-367 p.
, AIP Conference Proceedings, ISSN 0094-243X ; 871
Monte Carlo operators, Neoclassical theory
IdentifiersURN: urn:nbn:se:kth:diva-155959DOI: 10.1063/1.2404571ISI: 000244483500037ScopusID: 2-s2.0-33846987180ISBN: 0735403767ISBN: 9780735403765OAI: oai:DiVA.org:kth-155959DiVA: diva2:766190
THEORY OF FUSION PLASMAS: Joint Varenna-Lausanne International Workshop, 28 August-1 September 2006, Varenna, Italy
QC 201411262014-11-262014-11-172014-11-26Bibliographically approved