ICRF near-field effects sensitivity to magnetic tilt-angle

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.

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Publication Details

Journal
Springer Link (Chiba Institute of Technology)
Published
2026-01-07
DOI
https://doi.org/10.1051/epjconf/202634602009/pdf
Primary Topic
Magnetic confinement fusion research
Type
article
Field-Weighted Citation Impact
0.00

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article

ICRF near-field effects sensitivity to magnetic tilt-angle

S. Heuraux, R. Ochoukov, G. Urbanczyk, R. Dux et al.
Springer Link (Chiba Institute of Technology)
Magnetic confinement fusion research
article

ICRF near-field effects sensitivity to magnetic tilt-angle

S. Heuraux, R. Ochoukov, G. Urbanczyk, R. Dux, R. Bilato, J. Moritz, N. Fedorczak, W. Tierens, Laurent Colas, J.P. Gunn, Volodymyr Bobkov, Nicola Bertelli, Léonel Tsowémoo Faabomvé, Raymond Diab, Julien Hillairet, Syun’ichi Shiraiwa
article en

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.

Springer Link (Chiba Institute of Technology)
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
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