Year: 2026
Type: article
Abstract: A vertical displacement event in the COMPASS tokamak is modelled using the CarMa0NL code, with the halo-current width treated as a free parameter. The simulations that best reproduce the experimental evolution are those in which the resulting safety factor at the last closed flux surface remains above unity. This result is consistent with the possibility that the interaction of the \(m/n=1/1\) mode with higher harmonics, and the associated formation of a stochastic magnetic field-line structure, may contribute to setting the halo-current width. The potential relevance of this observation to scrape-off-layer widening and divertor heat-load mitigation during normal operation is discussed.
Source: Nuclear Fusion
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,595
Funder: European Commission
OpenAlex ID: W7224550558