$$\textbf{E}\times \textbf{B}$$ Drift Particle Transport in Tokamaks

Autor: L.A. Osorio-Quiroga, G.C. Grime, M. Roberto, R.L. Viana, Y. Elskens, I.L. Caldas
Přispěvatelé: Instituto de Fisica da Universidade de São Paulo (IFUSP), Universidade de São Paulo = University of São Paulo (USP), Instituto Tecnológico de Aeronáutica [São José dos Campos] (ITA), instituto de fisica, universidade federal do Parana, Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), CNPq, CAPES, FAPESP, COFECUB, CAPES/COFECUB Complex dynamics of plasmas Ph908/18 / 4027QA
Rok vydání: 2023
Předmět:
Zdroj: Brazilian Journal of Physics
Brazilian Journal of Physics, 2023, 53 (4), pp.96. ⟨10.1007/s13538-023-01302-z⟩
ISSN: 1678-4448
0103-9733
DOI: 10.1007/s13538-023-01302-z
Popis: 10 pages, 9 figures, 1 table. Published in Brazilian Journal of Physics; International audience; In tokamaks, modification of the plasma profiles can reduce plasma transport, improving particle confinement. However, this improvement is still not completely understood. In this work, we consider a drift wave test particle model to investigate the influence of the electric and magnetic field profiles on plasma transport. Test particle orbits subjected to ExB drift are numerically integrated and their transport coefficient is obtained. We conclude that sheared profiles reduce particle transport, even for high amplitude perturbations. In particular, nonmonotonic electric and magnetic fields produce shearless transport barriers, which are particularly resistant to perturbations and reduce even more the transport coefficient.
Databáze: OpenAIRE
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