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Guiding centre orbits of particles in tokamaks

Grant number: 22/15489-4
Support Opportunities:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): May 01, 2023
Effective date (End): 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)

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