Guiding centre orbits of particles in tokamaks

• Grant number: 22/15489-4
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date until: May 01, 2023
• End date until: April 30, 2028
• Field of knowledge: Physical Sciences and Mathematics - Physics - Physics of Fluids, Plasma Physics and Electrical Discharge
• Principal Investigator: Iberê Luiz Caldas
• Grantee: Lucas Nedeff Assub Amaral
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 18/03211-6 - Non linear dynamics, AP.TEM

Abstract

To verify the possibility of thermonuclear fusion energy production in magnetically confined plasmas, experiments have been performed in tokamaks. However, the plasma confinement is limited by the particle escape to the vessel. To improve the confinement, the escape has been controlled by modifying the electric and magnetic equilibrium field profiles. In this project, we theoretically investigate the onset of the electric turbulence driven chaotic particle transport at the plasma edge. The analysis considers a Hamiltonian model in toroidal geometry. The results should indicate the equilibrium profiles to reduce the chaotic particle transport in tokamaks. (AU)