Romashchenko O. Stability of magnetohydrodynamic oscillations in toroidal systems

Object of study: MHD stability of plasma of finite pressure in tokamaks and traps with the spatial magnetic axis. Aim of study: numerical analysis of excitation zones of MM and IBM and their growth rate for tokamaks and traps with the spatial magnetic axis. Methods of study: the stability of IBM and MM in tokamak with the ripple magnetic field and nonmonotonous profile of the safety factor q has been investigated. It is shown that complicated profiles q lead to the simultaneous stabilization of these modes in the different regions of plasma column. The of optimization of the pressure profile has been proposed. The research of stability of IBM and MM in case of calculated pressure profile with additional formation of the nonmonotonous profile of the safety factor q has been performed. Sphere of implementation: the results of research can be applied to the analysis of plasma stabilityin a modern tokamak in the so-called "reverse shear" regime of the confinement of plasma to further solving the probl em of controlled fusion..