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- Title
Role of the edge electric field in the resonant mode-particle interactions and the formation of transport barriers in toroidal plasmas.
- Authors
Anastassiou, Giorgos; Zestanakis, Panagiotis; Antonenas, Yiannis; Viezzer, Eleonora; Kominis, Yannis
- Abstract
The impact of an edge radial electric field on the particle orbits and the orbital spectrum in an axisymmetric toroidal magnetic equilibrium is investigated using a guiding centre canonical formalism. Poloidal and bounce/transit-averaged toroidal precession frequencies are calculated, highlighting the role of the radial electric field. The radial electric field is shown to drastically modify the resonance conditions between particles with certain kinetic characteristics and specific perturbative non-axisymmetric modes, and to enable the formation of transport barriers. The locations of the resonances and the transport barriers that determine the particle, energy and momentum transport are shown to be accurately pinpointed in the phase space by employing the calculated orbital frequencies.
- Subjects
TOROIDAL plasma; ELECTRIC fields; PHASE space; ORBITS (Astronomy); PLASMA dynamics; RESONANCE
- Publication
Journal of Plasma Physics, 2024, Vol 90, Issue 1, p1
- ISSN
0022-3778
- Publication type
Article
- DOI
10.1017/S0022377824000047