Theoretical Models of Plasma Confinement in Tokamak Reactors

Abstract

Plasma confinement in tokamak reactors is a pivotal area of study in the quest for controlled nuclear fusion. Various theoretical models, ranging from classical and neoclassical transport to magnetohydrodynamics (MHD) and gyrokinetic theories, have been developed to understand and optimize confinement dynamics. This article presents an in-depth exploration of these models with a focus on their underlying assumptions, limitations, and contributions to the development of next-generation fusion devices. The role of MHD instabilities, turbulent transport, and magnetic geometry in determining confinement quality is also examined. Emphasis is placed on the integration of theoretical predictions with experimental data from leading tokamak facilities worldwide.