Instabilities of Plasma in Magnetic Constraint Controlled Nuclear Fusion Devices

Abstract

This paper investigates the plasma instability issues in magnetic confinement nuclear fusion devices and explores their impact on fusion reaction efficiency and control methods. The research aims to analyze the physical mechanisms of macroscopic and microscopic scale plasma instabilities and conclude suppression strategies. Through theoretical models, numerical simulations, and data-driven methods, a systematic study was conducted on various instabilities such as resistive wall mode, tearing mode, and edge localized mode, as well as their interactions. The research results indicate that by optimizing the magnetic field structure, employing resonant magnetic perturbation (RMP) technology, and using supersonic molecular beam injection (SMBI), instabilities can be effectively suppressed, and plasma confinement performance can be improved. Additionally, the research on high-parameter steady-state operation and the interaction between fast particles and instabilities provides important basis for the commercial operation of future fusion devices. The conclusion of this paper emphasizes the crucial role of plasma instability control in achieving controllable nuclear fusion and looks forward to the future development direction of related technologies.