| Issue |
EPJ Web Conf.
Volume 346, 2026
25th Topical Conference on Radio-Frequency Power in Plasmas (RFPPC2025)
|
|
|---|---|---|
| Article Number | 02019 | |
| Number of page(s) | 4 | |
| Section | Wave Heating and Current Drive in Present and Future Fusion Devices | |
| DOI | https://doi.org/10.1051/epjconf/202634602019 | |
| Published online | 07 January 2026 | |
https://doi.org/10.1051/epjconf/202634602019
Analysis of Parametric Decay Instabilities Driven by Helicon Waves in Tokamak Experiments
Department of Engineering Physics, Tsinghua University, 100084 Beijing, China
* Corresponding author: yang-xy19@mails.tsinghua.edu.cn
Published online: 7 January 2026
In this study, we analyse and compute the local growth rate of parametric decay instabilities of helicon waves under typical scrape-off layer conditions. Our findings are consistent with previous work [Porkolab et al., AIP Conference Proceedings 2984, 070004 (2023)], confirming that the dominant decay channels are ion cyclotron quasi-modes and their harmonics. While the parametric instability can be excited at extremely low input power, it can be suppressed by a higher electron temperature. Conversely, higher plasma densities increase the local growth rate, suggesting that helicon waves may face challenges in high-density plasmas.
© 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.
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