Predictive modeling of Alfvén eigenmode stability in inductive scenarios in JT-60SA

• DOI: 10.3389/fphy.2023.1267696
• Publication Date: 2023-11-23T15:46:21Z
• Authors: R. Coelho; P. Vincenzi; M. Vallar; P. Rodrigues; E. Tholerus; K. Särkimäki; J. Garcia; D. Borba; F. Nabais; R. Calado; J. Ferreira; A. Figueiredo
• Keywords: Neutral Beam Injection; Safety factor

The JT-60SA device offers unique conditions before ITER for the study of interaction energetic particles with plasma waves. With similar dimensions to JET, e.g., a major radius but slightly more elongated volume, is used as high-power where additional heating power (including 10 MW 500 keV Neutral Beam Injection) up 41 and potential high non-inductive current operation pave path numerous challenges in physics on MHD stability, particular, when considering effects particles. Several operational scenarios DEMO-relevant regimes, terms non-dimensional parameters, are anticipated. In this work, stability Alfvén eigenmodes (AEs) variants two most relevant single null analyzed: full I p inductive scenario at density (1.1 × 20 m −3 on-axis electron density) 5.48MA/2.05T toroidal magnetic field, an advanced (hybrid) ion energy transport barrier (ITB) 3.5MA/2.28T field. workflow included CRONOS code establish scenario, ASCOT calculate slowing-down particle distributions positive/negative source-based neutral beam, MISHKA/CASTOR-K suite spectra AEs associated drive/damping contributions from NBI ions, well thermal landau damping. systematic analysis, over large Fourier space mode number/mode frequency, provides evidence that although significant fraction supra-Alfvénic stemming negative beam (500 keV) can, some cases, drive both scenarios, it not enough overcome addition, ITB shown be stable against localized vicinity well, offering good prospects sustainability performance ITB. Finally, sensitivity scan results influence fast q-profile AE stability.