MHD Equilibrium and Kink Stability in Damavand Tokamak |
| |
Authors: | Fatemeh Dini Sina Khorasani |
| |
Affiliation: | (1) Plasma Physics Research Institute, AEOI, P. O. Box 14399-51113, Amirabad, Tehran, Iran;(2) School of Electrical Engineering, Sharif University of Technology, P. O. Box 11365-9363, Tehran, Iran |
| |
Abstract: | Magnetohydrodynamic (MHD) equilibrium is vulnerable to numerous destabilizing mechanisms. Instabilities introduce distortions
to the plasma magnetic surfaces and its boundaries, their driving force being the radial gradient of plasma toroidal current
density. For certain modal numbers, internal kink modes may develop, and their study is feasible according to the energy principle,
in which the change in total potential energy due to the disturbance is evaluated. In this article, we present a totally new
analysis of MHD equilibrium and stability, and apply it to Damavand tokamak which has a large aspect ratio. For this purpose,
we combine perturbation and Green’s function methods to solve for the equilibrium configuration. At this stage, plasma profiles
are found explicitly in terms of Bessel functions, and we present a simple expression for estimation of total toroidal plasma
current. Then the rest of plasma profiles, including poloidal magnetic flux, safety factor, and toroidal current density,
are obtained and plotted. In the next step, we turn to the stability calculations and show that Damavand plasma is resistant
to most of the disturbances. |
| |
Keywords: | Equilibrium Magnetohydrodynamics Tokamaks Stability Plasma radial profiles Magnetic field configurations |
本文献已被 SpringerLink 等数据库收录! |
|