Particle Transport in Magnetically Confined Plasmas

• Grant number: 12/10240-6
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): November 01, 2012
• Effective date (End): February 29, 2016
• Field of knowledge: Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge
• Principal Investigator: Iberê Luiz Caldas
• Grantee: Julio César David da Fonseca
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 11/19296-1 - Nonlinear dynamics, AP.TEM
• Associated scholarship(s): 13/00483-1 - Particle transport in magnetically confined plasmas, BE.EP.DR

Abstract

In this project, we consider a hamiltonian model of the drift motion to investigate the chaotic transport of particles in the edge of confined plasmas in tokamaks. The hamiltonian model provide the motion equations, which are dependent of a function of the electric potential. This function is characterized by an equilibrium potential and term corresponding to the drift waves. In this project, we adopt a profile for theequilibrium potential which violates the so-called "twist" condition. We intend, therefore, to study typical properties of non-twist hamiltonian systems, as, for example, the formation of transport barriers and the presence of reconnection processes. The secon goal of this project is to analyse the effects of Larmor radius on the transport. These effects are relevant in the case of energetic particles or in the presence of rapidly varying fields.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DA FONSECA, J. D.; DEL-CASTILLO-NEGRETE, D.; SOKOLOV, I. M.; CALDAS, I. L.. A statistical study of gyro-averaging effects in a reduced model of drift-wave transport. Physics of Plasmas, v. 23, n. 8, AUG 2016. (12/10240-6, 11/19296-1)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

FONSECA, Julio César David da. Area-Preserving Maps Models of the Electric Drift Motion with Finite Larmor Radius Effects. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Física (IF/SBI) São Paulo.