Numerical modeling of impurity powder injection in W7-X

F. Nespoli; Y. Feng; G. Kawamura; M. Shoji; R. Lunsford; D. Hathiramani; J. Koopmann; A. Nagy; F. Effenberg; N.A. Pablant; C. Killer; D. Zhang; M. Kubkowska; S. Jablonski; G. Kocsis; B. Buttenschön; D. Nicolai

Nuclear Materials and Energy (Mar 2025)

Numerical modeling of impurity powder injection in W7-X

F. Nespoli,
Y. Feng,
G. Kawamura,
M. Shoji,
R. Lunsford,
D. Hathiramani,
J. Koopmann,
A. Nagy,
F. Effenberg,
N.A. Pablant,
C. Killer,
D. Zhang,
M. Kubkowska,
S. Jablonski,
G. Kocsis,
B. Buttenschön,
D. Nicolai

Affiliations

F. Nespoli: Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America; Corresponding author.
Y. Feng: Max–Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
G. Kawamura: National Institute for Fusion Science, 322-6 Oroshi-cho Toki, Gifu 509-5292, Japan; National Institutes for Quantum Science and Technology, Rokkasho, Aomori 039-3212, Japan
M. Shoji: National Institute for Fusion Science, 322-6 Oroshi-cho Toki, Gifu 509-5292, Japan
R. Lunsford: Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America
D. Hathiramani: Max–Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
J. Koopmann: Max–Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
A. Nagy: Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America
F. Effenberg: Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America
N.A. Pablant: Princeton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, United States of America
C. Killer: Max–Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
D. Zhang: Max–Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
M. Kubkowska: Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
S. Jablonski: Institute of Plasma Physics and Laser Microfusion, 01-497 Warsaw, Poland
G. Kocsis: Center for Energy Research, Budapest 1121, Hungary
B. Buttenschön: Max–Planck-Institut für Plasmaphysik, 17491 Greifswald, Germany
D. Nicolai: Forschungszentrum Jülich, IEK-4 Plasmaphysik, Julich 52428, Germany

Journal volume & issue: Vol. 42
p. 101837

Abstract

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In this work, we present numerical simulation results of powder injection in W7-X using the EMC3-EIRENE and DIS codes. First, we model powder injection experiments performed in W7-X with the Probe Mounted Powder Injector. The simulation results qualitatively agree with visible imaging measurements. Secondly, we perform predictive simulations to guide the installation of an Impurity Powder Dropper in W7-X, allowing to choose in between several available non-vertical ports to maximize the amount of powder penetrating into the plasma, as well as the verticality of the port, to minimize sticking of the powders in the in-vessel stainless steel guiding tube. Port AEM41 is selected as the best candidate for IPD installation. The robustness of the simulation results has been verified for different plasma densities, powder materials and sizes, powder friction coefficient and changes in the plasma flow.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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