Real-time feedback control of the impurity emission front in tokamak divertor plasmas

Timo Ravensbergen (Corresponding author), Matthijs van Berkel (Corresponding author), Artur Perek, C. Galperti, B.P. Duval, O. Février, R.J.R. van Kampen, F.A.A. Felici, J.T. Lammers, Christian Theiler, Johan Schoukens, B. Linehan, M. Komm, S.S. Henderson, D. Brida, Marco R. de Baar

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In magnetic confinement thermonuclear fusion the exhaust of heat and particles from the core remains a major challenge. Heat and particles leaving the core are transported via open magnetic field lines to a region of the reactor wall, called the divertor. Unabated, the heat and particle fluxes may become intolerable and damage the divertor. Controlled ‘plasma detachment’, a regime characterized by both a large reduction in plasma pressure and temperature at the divertor target, is required to reduce fluxes onto the divertor. Here we report a systematic approach towards achieving this critical need through feedback control of impurity emission front locations and its experimental demonstration. Our approach comprises a combination of real-time plasma diagnostic utilization, dynamic characterization of the plasma in proximity to the divertor, and efficient, reliable offline feedback controller design.
Original languageEnglish
Article number1105
Number of pages9
JournalNature Communications
Volume12
Issue number1
DOIs
Publication statusPublished - 17 Feb 2021

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