Thermal quench and current profile relaxation dynamics in massive-material-injection-triggered tokamak disruptions

نویسندگان

چکیده

Abstract 3D non-linear magnetohydrodynamic simulations of a disruption triggered by massive injection argon gas in JET are performed with the JOREK code. The key role thermal drive m = 2, n 1 tearing mode (i.e. from helical cooling inside island) process is highlighted varying amplitude and position source across simulations, also during simulation. In cases where this persists spite development magnetic stochasticity, which favoured moving an ad hoc way plasma edge into 2/1 island at some point simulation, relaxation region q ⩽ 2 (roughly) takes place. This generates current spike comparable to experimental one. Simulations compared detail measurements via synthetic diagnostics, validating model degree.

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ژورنال

عنوان ژورنال: Plasma Physics and Controlled Fusion

سال: 2021

ISSN: ['1361-6587', '0741-3335']

DOI: https://doi.org/10.1088/1361-6587/ac234b