| Issue |
EPJ Web Conf.
Volume 346, 2026
25th Topical Conference on Radio-Frequency Power in Plasmas (RFPPC2025)
|
|
|---|---|---|
| Article Number | 03007 | |
| Number of page(s) | 7 | |
| Section | Radio-Frequency and Microwave Diagnostics and Technology | |
| DOI | https://doi.org/10.1051/epjconf/202634603007 | |
| Published online | 07 January 2026 | |
https://doi.org/10.1051/epjconf/202634603007
Direct Measurement of ICRF-Enhanced Plasma Potentials on WEST Using Reciprocating Emissive Probes
1 MIT Plasma Science and Fusion Center, Cambridge, MA 02139, United States of America
2 CEA, IRFM, F-13108 Saint-Paul-Lez-Durance, France
* Corresponding author: diab@mit.edu
Published online: 7 January 2026
An extensive documentation of ICRF-enhanced plasma potentials has been conducted over two experimental campaigns on the WEST tokamak using reciprocating emissive probes magnetically connected to two ICRF antennas. The collected data spans a wide range of antenna electrical settings (coupled power, toroidal phasing, left–right power balance) and plasma parameters (density at the antenna limiter above and below the lower hybrid resonance, plasma current, minority fraction). By scanning the edge safety factor across multiple probe plunges, the magnetic connection between the probe and the antenna varied, enabling the construction of a 2D map of the plasma and floating potentials around an active ICRF antenna. This dataset will be used to validate RF simulation tools equipped with the sheath boundary condition and used to predict RF rectified potentials and ICRF-induced impurity sputtering in future machines. This paper presents the diagnostic and some initial measurements, while the rest will be reported elsewhere.
© The Authors, published by EDP Sciences, 2026
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.