E x B Drift Particle Transport in Tokamaks

Author(s)

Osorio-Quiroga, L. A. ; Grime, G. C. ; Roberto, M. ; Viana, R. L. ; Elskens, Y. ; Caldas, I. L.

• Document type: Journal article
• Source: Brazilian Journal of Physics; v. 53, n. 4, p. 11-pg., 2023-08-01.

Abstract

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 E x B 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. (AU)

• FAPESP's process: 22/05667-2 - Transport Barriers in Magnetically Confined Plasmas
• Grantee: Gabriel Cardoso Grime
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/01399-8 - Symplectic maps for magnetically confined plasmas
• Grantee: Leonardo Antonio Osorio Quiroga
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 22/08699-2 - Chaotic transport in tokamak plasmas
• Grantee: Marisa Roberto
• Support Opportunities: Regular Research Grants
• FAPESP's process: 22/04251-7 - Fractal Structures in Plasma Physics
• Grantee: Iberê Luiz Caldas
• Support Opportunities: Research Grants - Visiting Researcher Grant - Brazil
• FAPESP's process: 18/03211-6 - Non linear dynamics
• Grantee: Iberê Luiz Caldas
• Support Opportunities: Research Projects - Thematic Grants