Year: 2026
Type: conference-paper
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.
Source: EPJ Web of Conferences
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, ASDEX Upgrade Team, WEST Team, and EUROfusion Tokamak Exploitation Team
Institutions: Centre National de la Recherche Scientifique, Max Planck Institute for Plasma Physics, Institut Jean Lamour, Université de Lorraine, Princeton Plasma Physics Laboratory, Oak Ridge National Laboratory, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Massachusetts Institute of Technology
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G1079818582, G1143651532, G115085052, G122673668, G1286236842, 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, G7354628648, G8578629727, G969889393
OpenAlex ID: W7119060680