Sticky islands in stochastic webs and anomalous chaotic cross-field particle transport by E×B electron drift instability. (April 2021)

• Record Type: Journal Article
• Authors: Mandal, D.; Elskens, Y.; Leoncini, X.; Lemoine, N.; Doveil, F.
• Is Part Of: Chaos, solitons and fractals. Volume 145(2021)
• Publication Date: 2021-04
• Subjects: Stochastic web -- ExB drift instability -- Hall thruster -- Super-diffusive transport; 05.45.-a Nonlinear dynamics and chaos -- 52.20.Dq Particle orbits -- 52.25.Fi Transport properties -- 52.75.Di Ion and plasma propulsion -- 05.45.Pq Numerical simulations of chaotic systems; Chaotic behavior in systems -- Periodicals; Solitons -- Periodicals; Fractals -- Periodicals; Chaotic behavior in systems; Fractals; Solitons; Periodicals; 003.7
• DOI: 10.1016/j.chaos.2021.110810
• Languages: English
• ISSNs: 0960-0779

Abstract

Highlights: E × B Drift instability generated wave makes charged particle dynamics chaotic. Reduced two-degrees-of-freedom Hamiltonian simplifies the dynamics complexity. Halloween masklike and other web structures yield longrange transport. A scaling exponent characterises the crossfield transport: Anomalous, Superdiffusive. Different sticking time powerlaw statistics generate successive regimes of transport. Abstract: The E × B electron drift instability, present in many plasma devices, is an important agent in cross-field particle transport. In presence of a resulting low frequency electrostatic wave, the motion of a charged particle becomes chaotic and generates a stochastic web in phase space. We define a scaling exponent to characterise transport in phase space and we show that the transport is anomalous, of super-diffusive type. Given the values of the model parameters, the trajectories stick to different kinds of islands in phase space, and their different sticking time power-law statistics generate successive regimes of the super-diffusive transport.