KIT | KIT-Bibliothek | Impressum | Datenschutz

Overview of Wendelstein 7-X high-performance operation

Grulke, O.; Acton, G.; Adamek, J.; Aggelis, D.; Alamo-Calderon, R.-M.; Albert, C.; Aleynikov, P.; Aleynikova, K.; Alonso, A.; Amanekwe, G. C.; Anda, G.; Andreeva, T.; Andrew, E.; Arkuszewski, A.; Arnold, S.; Arranz, M.; Arvanitou, M.; Ascasibar, E.; Astrain Etxezarreta, M.; ... mehr

Abstract:

The Wendelstein 7-X (W7-X) stellarator has completed two consecutive experimental campaigns OP 2.2 (Sep.-Dec. 2024) and OP 2.3 (Feb.-May 2025) under a new operational strategy enabling more than one year of uninterrupted device availability. This approach, supported by exceptionally high subsystem reliability, allowed sustained high-efficiency plasma operations with up to 80–100 discharges per day across a broad range of magnetic configurations. Several key technical upgrades-most notably the first operation of a 1.5 MW class steady-state gyrotron, a new steady-state pellet injector, and advanced real-time feedback control systems significantly enhanced heating, fueling, and plasma control capabilities. Together, these improvements enabled major advances in long-pulse performance, high-β operation, and confinement optimization. Long-pulse discharges achieved 1.8 GJ of injected energy under fully detached divertor conditions, while reduced-field scenarios facilitated record volume-averaged β values approaching 3%. High-performance plasmas with centrally peaked density profiles, created via neutral beam injection (NBI) or sustained pellet fueling, demonstrated strongly reduced turbulent transport and stellarator-record fusion triple products. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000198039
Veröffentlicht am 16.10.2026
Originalveröffentlichung
DOI: 10.1088/1741-4326/ae5f32
Scopus
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Hochleistungsimpuls- und Mikrowellentechnik (IHM)
Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.11.2026
Sprache Englisch
Identifikator ISSN: 0029-5515, 1741-4326
KITopen-ID: 1000198039
Erschienen in Nuclear Fusion
Verlag International Atomic Energy Agency (IAEA)
Band 66
Heft 11
Seiten Art.Nr: 116003
Vorab online veröffentlicht am 14.05.2026
Schlagwörter magnetic confinement, stellarator, Wendelstein 7-X
Nachgewiesen in Scopus
OpenAlex
KIT – Die Universität in der Helmholtz-Gemeinschaft
KITopen Landing Page