A Model of Tokamak Locked Mode Disruptions
Plasma Physics
2023-04-18 v1
Abstract
Locked modes are precursors to major disruptions. During locked modes, the temperature decreases in the plasma edge region. This causes the current to contract. A model is given to analyze the MHD stability of contracted current equilibria. If there is sufficient current contraction, resistive wall tearing modes are destabilized. This requires that the q = 2 surface be sufficiently close to the wall. The threshold conditions obtained in the model are consistent with experimental observations of the conditions for a thermal quench in a disruption.
Keywords
Cite
@article{arxiv.2304.07994,
title = {A Model of Tokamak Locked Mode Disruptions},
author = {H. R. Strauss},
journal= {arXiv preprint arXiv:2304.07994},
year = {2023}
}
Comments
7 pages, 3 figures