Plasma and Fusion Research

Volume 17, 2406097 (2022)

Regular Articles

Core Diagnostics for WENDELSTEIN 7-X Steady-State Exploration Until 18 GJ
Matthias W. HIRSCH, Sebastian BANNMANN, Marc N. A. BEURSKENS, Christoph BIEDERMANN, Sergey BOZHENKOV, Kai-Jakob BRUNNER, Neha CHAUDHARY, Hannes DAMM, Oliver FORD, Juan GUERRERO-ARNAIZ, Gole FUCHERT, Xiang HAN1), Udo HÖFEL, Jia HUANG2), Jens KNAUER, Jean-Paul KOSCHINSKY, Andreas KRÄMER-FLECKEN2), Beate KURSINSKI, Andreas LANGENBERG, Samuel LAZERSON, Jens MEINEKE, Dimitry MOSEEV, Johan OOSTERBEEK, Novimir PABLANT3), Eckehard PASCH, Andreas PAVONE, Peter PÖLÖSKEI, Torsten RICHERT, Torsten STANGE, Matthias STEFFEN, Mathias STERN, Lilla VANÓ, Robert C. WOLF, Haoming M. XIANG2), Marco ZANINI, for the W7-X Team
Max-Planck-Institut für Plasmaphysik, Greifswald, Germany
1)
Institute of Plasma Physics, Chinese Academy of Sciences, 230031 Hefei, Anhui, People's Republic of China
2)
Forschungszentrum Jülich GmbH, Institut für Energie-und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), 52425 Jülich, Germany
3)
Princeton Plasma Physics Laboratory, US
(Received 7 January 2022 / Accepted 5 March 2022 / Published 26 August 2022)

Abstract

This contribution provides an overview of the core diagnostics as they are required for W7-X steady-state high-density operation with a divertor and profile control. The inferred profiles then address the stellarator optimization. A particular task is the characterization of fast ion slowing down and -losses, which in a classical stellarator reactor could result in unacceptable wall loads and ultimately are deleterious for the heating efficiency. The energy dissipated during operation, 10 MW · 1800 s impacts on the technical diagnostic realization via loads to in-vessel components, quasi steady-state operation requires adequate data acquisition and control systems.

Keywords

plasma diagnostics, steady-state operation, stellarator, W7-X, profile inference, fast-ion

DOI: 10.1585/pfr.17.2406097

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