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ICRF near-field effects sensitivity to magnetic tilt-angle

Year: 2026
Type: article
Abstract: This paper complements the study reported in G. Urbanczyk et al 2025 Nucl. Fusion 65 046018 by investigating how near-field effects from Ion Cyclotron Range of Frequency (ICRF) antennas depend on the magnetic geometry, particularly focusing on the sensitivity of rectified sheath potentials and associated impurity production to variations in magnetic field tilt-angle. Simulations were conducted using Petra-M, employing a flat model of the ASDEX Upgrade (AUG) three-strap antenna, and COMSOL, utilizing a curved model of the WEST antenna. Results demonstrate indications of sensitivity of the rectified sheath potentials and impurity sputtering to the alignment of Faraday screen bars with the magnetic field lines, emphasizing the necessity for careful consideration of geometric alignment in antenna design for fusion devices. This trend is consistent with experimental data measured with various diagnostics.
DOI: 10.1051/epjconf/202634602009/pdf
Authors: Guillaume Urbanczyk, Syun’ichi Shiraiwa, Nicola Bertelli, Wouter Tierens, Roberto Bilato, Volodymyr Bobkov, Roman Ochoukov, Ralph Dux, Laurent Colas, James-Paul Gunn, Julien Hillairet, Nicolas Fedorczak, Raymond Diab, Léonel Tsowémoo Faabomvé, Jérôme Moritz, Stéphane Heuraux
Institutions: Max Planck Institute for Plasma Physics, Institut Jean Lamour, Princeton Plasma Physics Laboratory, Oak Ridge National Laboratory, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Cadarache, Institut de Recherche sur la Fusion par confinement Magnétique, Massachusetts Institute of Technology
Language: English
Open Access status: green
Funders: U.S. Department of Energy, Israel Cancer Research Fund, National Energy Research Scientific Computing Center, EUROfusion, European Commission, Office of Science, Euratom Research and Training Programme, Lawrence Berkeley National Laboratory, Princeton Plasma Physics Laboratory
Awards: G1079818582, G1143651532, G115085052, G122673668, G1286236842, G157624241, G1677143136, Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium, G2293481551, G3083819904, G3562821882, G419881185, G42916606, G4501827968, G498139845, G5076365615, G5172252545, G526230902, G53368406, G5344189563, G6652958823, G7354628648, G8578629727, G969889393
OpenAlex ID: W7119467774
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