Kathage, YannickVazquez Cortes, AlejandroMerli, StefanDay, ChristianGiegerich, ThomasHanke, StefanIgitkhanov, JuriSchulz, AndreasWalker, Matthias2024-05-222024-05-2220232571-61821889664693http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-ds-144074http://elib.uni-stuttgart.de/handle/11682/14407http://dx.doi.org/10.18419/opus-14388Experimental findings to contribute to the preliminary design of a metal foil pump for fuel separation in the Direct Internal Recycling loop of the DEMO fusion device are presented. In parametric studies on a small-scale superpermeation experiment with a microwave plasma source and two different metal foil materials, niobium Nb and vanadium V, a substantial increase in permeation with plasma power and with a decrease in pressure was observed. To ease operation in the typical fusion environment, in-situ heating procedures were developed to recover from impurity contamination. The temperature independence of plasma-driven permeation from 600 to 900 °C metal foil temperature was demonstrated. No proof of an isotopic effect for plasma-driven permeation of protium and deuterium could be found. The highest repeatable permeation flux achieved was 6.7 Pa∙m3/(m2∙s) or ~5.5 × 10-3 mol H/(m2∙s). The found compression ratios do safely allow the operation of the metal foil pump using ejector pumps as backing stages for the permeate. In a dedicated experimental setup, the operation of the plasma source in a strong magnetic field was tested. Parametric studies of pressure, power input, magnetic flux density, field gradient and field angle are presented.eninfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/620article2024-04-25