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Admixed pellets for fast and efficient delivery of plasma enhancement gases: Investigations at AUG exploring the option for EU-DEMO

Lang, P. T.; Baylor, L. R.; Day, Ch ORCID iD icon 1; Dux, R.; McDermott, R. M.; Giegerich, T. 1; Gleiter, T.; Kallenbach, A.; Ploeckl, B.; Rohde, V.; Zito, A.
1 Institut für Technische Physik (ITEP), Karlsruher Institut für Technologie (KIT)

Abstract:

Gas and pellet injection are envisaged for particle fuelling in EU-DEMO. The gas system will provide edge and divertor fuelling and any further gas species required for operation. Pellets, mm-sized bodies formed from solid hydrogen fuel, are designed for efficient and fast core fuelling. However, they can also be employed for a more efficient delivery of plasma enhancement gases, by admixing them with the fuelling pellets. To check this option for EU-DEMO, explorative investigations have been performed at ASDEX Upgrade (AUG).
The AUG system produces ice in a batch process sufficient for about 100 pellets, initially designed for operation with pure H$_2$ or D$_2$. On a trial basis, pellet formation was tested using an H$_2$/D$_2$ mixture and admixtures containing small amounts (up to 2 mol%) of N$_2$, Ar, Kr or Xe in the D$_2$ host. A homogeneous and reproducible ice composition was found for the H$_2$/D$_2$ = 1:1 case. For all the admixed gases, a depletion of the admixture in the ice with increasing atomic number is observed. Nevertheless, the fast and efficient delivery of admixed pellets was clearly demonstrated in dedicated plasma experiments at AUG. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000163799
Veröffentlicht am 08.11.2023
Originalveröffentlichung
DOI: 10.1016/j.fusengdes.2023.114020
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2023
Sprache Englisch
Identifikator ISSN: 0920-3796, 1873-7196
KITopen-ID: 1000163799
HGF-Programm 31.13.01 (POF IV, LK 01) Ex-Vessel Plant Systems & Engineering
Erschienen in Fusion Engineering and Design
Verlag Elsevier
Band 196
Seiten Art.-Nr.: 114020
Projektinformation EUROfusion (EU, EU 9. RP, 101052200)
Vorab online veröffentlicht am 29.09.2023
Schlagwörter ASDEX Upgrade, EU-DEMO, Fuelling, Pellet
Nachgewiesen in Web of Science
Dimensions
Scopus
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