Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
A fundamental problem for bootstrap current-driven magnetic islands is to understand the dynamics and profile properties of density and electron temperature. To study the evolution of density and electron temperature in a helical island geometry, we solve the coupled parallel momentum and continuity equations in the presence of a slowly growing magnetic perturbation that simulates the evolution of a neoclassical tearing mode. It is assumed that sound wave propagation along field lines is primarily responsible for equilibration of density over perturbed flux surfaces. Electron temperature equilibration, on the other hand, occurs on perturbed flux surfaces as a result of a rapid parallel heat flux. An analytic closure for this heat flux is constructed based on a multiple time and spatial scale, Chapman-Enskog-like analysis. This heat flux is then inserted into a temperature evolution equation which is solved in the presence of an evolving helical magnetic island.