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Single and double null equilibria in the SMART Tokamak
Dept. of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain; Centro Nacional de Aceleradores, U. Seville, CSIC, J. de Andalusia, Seville, Spain.ORCID iD: 0000-0002-8741-1018
Dept. of Atomic, Molecular and Nuclear Physics, University of Seville, Seville, Spain; Centro Nacional de Aceleradores, U. Seville, CSIC, J. de Andalusia, Seville, Spain.
Centro Nacional de Aceleradores, U. Seville, CSIC, J. de Andalusia, Seville, Spain; Max-Planck-Institute for Plasma Physics, Greifswald, 17491, Germany.ORCID iD: 0000-0002-6669-6851
Centro Nacional de Aceleradores, U. Seville, CSIC, J. de Andalusia, Seville, Spain; Skylife Engineering S.L., Seville, 41092, Spain.
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2021 (English)In: Plasma Research Express, E-ISSN 2516-1067, Vol. 3, no 4, article id 044001Article in journal (Refereed) Published
Abstract [en]

The SMall Aspect Ratio Tokamak (SMART) device is a novel, compact (Rgeo = 0.42 m, a = 0.22 m, A 1.70) spherical tokamak, currently under development at the University of Seville. The SMART device is being developed over 3 phases, with target on-axis toroidal magnetic fields between 0.1 ≼ Bf ≼ 1.0 T, and target plasma currents of between 35 ≼ Ip ≼ 400 kA; with phases 2 and 3 enabling access to a wide range of elongations (κ ≼ 2.30) and triangularities (− 0.50 ≼ δ ≼ 0.50). SMART employs four internal divertor coils with two internal and two external poloidal field coils, enabling operation in lower-single, upper-single and double-null configurations. This work examines phase 3 of the SMART device, presenting a prospective L-mode discharge scenario without external heating, before examining five highly-shaped equilibria, including: two double null triangular configurations, two single null triangular configurations and a baseline double null configuration. All equilibria are obtained via an axisymmetric Grad-Shafranov force balance solver (Fiesta), in combination with a circuit equation rigid current displacement model (RZIp) to obtain time-resolved vessel and plasma currents.

Place, publisher, year, edition, pages
IOP Publishing , 2021. Vol. 3, no 4, article id 044001
Keywords [en]
Equilibrium, Null point, SMART, Spherical tokamak, Triangularity
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-349667DOI: 10.1088/2516-1067/ac2a0eScopus ID: 2-s2.0-85118751466OAI: oai:DiVA.org:kth-349667DiVA, id: diva2:1880975
Funder
European Regional Development Fund (ERDF), IE17-5670
Note

QC 20240703

Available from: 2024-07-02 Created: 2024-07-02 Last updated: 2024-07-03Bibliographically approved

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Agredano Torres, Manuel

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Doyle, S JAgredano Torres, ManuelAyllon-Guerola, JGarcia-Munoz, MViezzer, E
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