Overview of current research and future plan for Tokamak Disruption Simulation (TDS) SciDAC Center
Abstract
The program goal of the Tokamak Disruption Simulation (TDS) SciDAC Center is to develop the fundamental physics understanding and the predictive simulation tools for tokamak disruption mitigation design. The three kinds of damage that a major disruption can bring to a tokamak reactor are: (1) rapid erosion of wall surface through melting, vaporization, and sublimation due to the orders of magnitude increase in the power exhaust in the thermal quench phase; (2) breaking and shifting of vacuum vessel and blanket modules due to the extreme electromagnetic loading by eddy and halo currents in the current quench phase; (3) deep damage of surface and substrate in the plasma facing components by runaway electrons that can induce costly secondary damages. While (2) has the flavor of 3D MHD, (1) and (3) are distinctly transport problems. Further complicating the disruption transport physics are the passive and active actuators, which include various gas and pellet injection schemes of impurities, externally applied 3D magnetic field perturbations, and fast electromagnetic wave injection. Here we give an overview of recent physics findings and future plan of TDS SciDAC center, with a focus on (1) and (3) aspect of the disruption mitigation problem.
Department of Energy OFES and OASCR.- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2018
- Bibcode:
- 2018APS..DPPT11067T