Year: 2026
Type: article
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.
Source: Nuclear Fusion
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,595
Awards: G1383581553, G2006238972, G222768804, G333530719, THE DIII-D NATIONAL FUSION PROGRAM AND ADVANCED FUSION TECHNOLOGY RESEARCH AND DEVELOPMENT, THEORY AND SIMULATION OF FUSION PLASMAS, G4775479038, THEORY AND SIMULATION OF FUSION PLASMAS, THE DIII-D NATIONAL FUSION PROGRAM AND ADVANCED FUSION TECHNOLOGY RESEARCH AND DEVELOPMENT, ATOM: ADVANCED TOKAMAK MODELING ENVIRONMENT, ATOM: ADVANCED TOKAMAK MODELING ENVIRONMENT, G7473577905, FUSION THEORY IN ADVANCED PHYSICS AND TECHNOLOGY, THE DIII-D FUSION RESEARCH PROGRAM AND ADVANCED FUSION TECHNOLOGY RESEARCH AND DEVELOPMENT, G8926688925
OpenAlex ID: W7118241553