April 4-6

Abstract Details

files Add files


Author: Dmitrii I. Kiramov
Requested Type: Poster
Submitted: 2022-03-04 12:11:18

Co-authors: B.N. Breizman

Contact Info:
Institute for Fusion Studies, UT Austin
2515 Speedway C1500
Austin, TX   78712-1

Abstract Text:
The vertical motion of the plasma current during the current quench phase of the uncontrolled major disruption is described analytically. The presented filament-based model interprets the vertical displacement event in the ideal wall limit as an adiabatically slow evolution of the plasma equilibrium. The initial pre-disruption equilibrium becomes unstable in a pitchfork bifurcation. The bifurcation occurs when the decaying plasma current passes a critical value determined by the external magnetic field. Minimizing the threshold plasma current is desirable to reduce the disruption-induced mechanical and heat loads on the first wall.