Suprathermal electron transport studies in radio-frequency-heated tokamak plasmas
This contribution reports on the study of suprathermal electron radial transport enhancement in the presence of electron-heating radio-frequency waves, such as electron-cyclotron waves or lower-hybrid waves. Since suprathermal electrons emit hard X-rays from Bremsstrahlung, experimental data from hard X-ray measurements are used to follow their dynamics. In particular, electron-cyclotron power modulation experiments performed in TCV show that this transport depends on the total electron-cyclotron power. These results are corroborated by experimentally constrained Fokker-Planck simulations [J. Cazabonne et al, Plasma Phys. Control. Fusion 65 , 104001 (2023)]. Similar experiments have been performed in WEST with lower-hybrid waves, and are reported for the first time. Preliminary analyses show potential evidence of suprathermal electron transport, but no clear dependence on wave power nor photon energy at this stage.
Authors
- S. Mazzi (ORCID: https://orcid.org/0000-0001-6491-8759)
- P. Forestier-Colleoni (ORCID: https://orcid.org/0000-0002-3089-5146)
- T. Fonghetti (ORCID: https://orcid.org/0009-0003-4948-5766)
- J. Cazabonne (ORCID: https://orcid.org/0000-0001-7629-1375)
- Y. Peysson (ORCID: https://orcid.org/0000-0001-8594-9474)
- A. Ekedahl (ORCID: https://orcid.org/0000-0002-0376-5119)
- Xavier Regal-Mezin
- Peter Donnel (ORCID: https://orcid.org/0000-0002-6669-416X)
- Tullio Barbui (ORCID: https://orcid.org/0000-0002-3449-3654)
- R. Dümont (ORCID: https://orcid.org/0000-0002-1030-138X)
- Joan Decker
- Ewout Devlaminck
- Didier Mazon
- Rémy Nouailletas
- Stefano Coda
- and the WEST Team
- Riccardo Saura
- the TCV Team
- Pierre Manas
Institutions
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Princeton Plasma Physics Laboratory (US)
- École Polytechnique Fédérale de Lausanne (CH)
Publication Details
- Journal
- EPJ Web of Conferences
- Published
- 2026-01-01
- DOI
- https://doi.org/10.1051/epjconf/202634601006
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- EUROfusion
- European Commission
- Euratom Research and Training Programme
- Staatssekretariat für Bildung, Forschung und Innovation