Near-edge beta induced Alfven eigenmode in DIII-D high bootstrap current fraction plasmas
Abstract In DIII-D high bootstrap current fraction plasmas heated solely by neutral beam injection, a fast ion-driven Beta-Induced Alfven Eigenmode (BAE) is frequently observed. The BAE peaks near the edge, suggesting the possibility of enhanced fast ion transport there and raising a potential concern for the first wall. Theoretical analysis and simulations show that the mode location is not fully determined by the fast-ion drive intensity, i.e. fast ion pressure gradient but is strongly related to the background unfavorable magnetic curvature drive near the edge, which is an intrinsic property of advanced scenarios that rely on a large radius internal transport barrier that exists for all the kinetic channels for performance improvement.
Authors
- V. S. Chan (ORCID: https://orcid.org/0000-0003-3273-2663)
- J. Mc. Clenaghan
- C. Holland (ORCID: https://orcid.org/0000-0001-6029-2306)
- S. Ding (ORCID: https://orcid.org/0000-0002-1930-0439)
- Yunpeng Zou (ORCID: https://orcid.org/0000-0003-3311-5931)
- Gang Yu (ORCID: https://orcid.org/0000-0002-3184-9045)
- E.M. Bass (ORCID: https://orcid.org/0000-0002-2167-283X)
- A. M. Garofalo (ORCID: https://orcid.org/0000-0002-8244-2448)
- Zhiyong Qiu
- Xiang Jian
- Xiaodi Du
Institutions
- University of California San Diego (US)
- Institute of Plasma Physics (CN)
- Southwestern Institute of Physics (CN)
- General Atomics (United States) (US)
- University of California, Davis (US)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2026-01-05
- DOI
- https://doi.org/10.1088/1741-4326/ae3333
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- National Natural Science Foundation of China
- Office of Science
- Young Scientists Fund
- Fusion Energy Sciences