External kink related sideways force on the tokamak wall

Abstract The external kink related sideways wall force is investigated on ultralow-q RFX-mod plasma discharge. Several theoretical predictions are experimentally verified. The presence of coupled kink modes is observed when the wall is subject to a sideways force. The absence of an integral electromagnetic force on the plasma is analyzed in such conditions. The dependence of sideways force on the mode growth rate is also revealed. A comparison between different theoretical predictions of the sideways force magnitude is performed for both flat-top and ramp-down phases. The results are compared with the direct calculation of sideways force provided by the ex-vessel magnetic measurements. These analyses show that the sideways force related to kink-like mode is much smaller than predicted by models that approximate the plasma as a rigid current-carrying ring or that neglect the presence of the wall.

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Publication Details

Journal
Nuclear Fusion
Published
2024-12-26
DOI
https://doi.org/10.1088/1741-4326/ada36f
Primary Topic
Earthquake and Tsunami Effects
Type
article
Field-Weighted Citation Impact
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article

External kink related sideways force on the tokamak wall

D. Terranova, V. Yanovskiy, P. Zanca, L. Pigatto et al.
Nuclear Fusion
Earthquake and Tsunami Effects
article

External kink related sideways force on the tokamak wall

D. Terranova, V. Yanovskiy, P. Zanca, L. Pigatto, L. Cordaro, Domenico Abate, V. D. Pustovitov, M. Zuin
article en

Abstract

Abstract The external kink related sideways wall force is investigated on ultralow-q RFX-mod plasma discharge. Several theoretical predictions are experimentally verified. The presence of coupled kink modes is observed when the wall is subject to a sideways force. The absence of an integral electromagnetic force on the plasma is analyzed in such conditions. The dependence of sideways force on the mode growth rate is also revealed. A comparison between different theoretical predictions of the sideways force magnitude is performed for both flat-top and ramp-down phases. The results are compared with the direct calculation of sideways force provided by the ex-vessel magnetic measurements. These analyses show that the sideways force related to kink-like mode is much smaller than predicted by models that approximate the plasma as a rigid current-carrying ring or that neglect the presence of the wall.

Nuclear FusionVol. 65(2)
National Agency for New Technologies, Energy and Sustainable Economic Development (IT), University of Padua (IT), Moscow Institute of Physics and Technology (RU), Kurchatov Institute (RU), Czech Academy of Sciences, Institute of Plasma Physics (CZ), Institute for the Science and Technology of Plasmas (IT)
European Commission, HORIZON EUROPE Marie Sklodowska-Curie Actions
Openalex Percentile: Top 72%
Earthquake and Tsunami Effects
DOIOpen Access PDFOpenAlex
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