Get started
Work

Identification and control of the exhaust using gas perturbations in the DIII-D tokamak

Year: 2025
Type: article
Abstract: This paper presents perturbative experiments that enable the validation and development of control-oriented models for exhaust control. We identify the response of the divertor plasma and scrape-off layer in the DIII-D tokamak to deuterium and nitrogen multi-sine perturbations, in favorable and unfavorable field directions for H-mode access. We obtained good signal-to-noise ratios in the 1–10 Hz frequency range by measuring Balmer-alpha, Lyman-alpha, and N 4 + line emission, radiated power, and neutral pressure. We find a similar phase response across gas species and magnetic field directions, while the gain response is nonlinear. With these experiments, we identify a control-oriented model to design a divertor radiated power controller to track specified reference waveforms in conjunction with resonant magnetic perturbations. Although the physics basis for compatibility between detachment and resonant magnetic perturbation edge-localized mode suppression remains to be demonstrated, the present results provide a robust controller that represents a promising step toward future joint control strategies.
DOI: 10.1088/1741-4326/ae1494
Authors: L. Ceelen, J.T.W. Koenders, D. Eldon, H. Anand, G.L. Derks, Q. Hu, A. Moser, F. Turco, R. Gerrú, L. Horvath, A. Leonard, M. de Baar, M. van Berkel
Institutions: Dutch Institute for Fundamental Energy Research, Eindhoven University of Technology, General Atomics (United States), Princeton Plasma Physics Laboratory, Columbia University, Massachusetts Institute of Technology
Language: English
Open Access status: gold
Estimated APC paid: $2,595
Funders: Toegepaste en Technische Wetenschappen, NWO, U.S. Department of Energy, EUROfusion, European Commission, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Office of Science, Euratom Research and Training Programme, Basic Energy Sciences, Fusion Energy Sciences
Awards: MHD MODE CONTROL RESEARCH IN DIII-D, G115085052, MIT PLASMA SCIENCE AND FUSION CENTER MAGNETIC CONFINEMENT FUSION EXPERIMENT RESEARCH AND RELATED ACTIVITIES, G180959178, Implementation of activities described in the Roadmap to Fusion during Horizon Europe through a joint programme of the members of the EUROfusion consortium, G222768804, G2293481551, G271220266, G333530719, G3375501697, G3562821882, G3819810962, THE DIII-D NATIONAL FUSION PROGRAM AND ADVANCED FUSION TECHNOLOGY RESEARCH AND DEVELOPMENT, G4896746546, G498139845, G516483051, G5172252545, G5188626685, G6117626951, G663282964, THE DIII-D NATIONAL FUSION PROGRAM AND ADVANCED FUSION TECHNOLOGY RESEARCH AND DEVELOPMENT, G7473577905, THE DIII-D FUSION RESEARCH PROGRAM AND ADVANCED FUSION TECHNOLOGY RESEARCH AND DEVELOPMENT, MHD MODE CONTROL RESEARCH IN DIII-D, MHD MODE CONTROL RESEARCH IN DIII-D, G8973591466, G969889393
OpenAlex ID: W4415289394
FWCI: 0.473
Cites: 45
Cited by: 1
Related to: