Fig. 4
From: When superfluidity meets superconductivity in the extraction of 3He isotope from liquid helium
Upstream and downstream concentrations of 3\(\hbox {He}\) as a function of the filtration time: (a) upstream concentration for YBCO-123 (red circles) as compared to MWCNTs (gray circles—data taken from15 and shifted in time for better visualization) at 55 mW heater power. (b) upstream (red circles) and downstream (blue circles) 3\(\hbox {He}\) concentrations measured simultaneously, black arrows mark the appearance of the lambda transition and switching on the heater to drive the fountain effect. Insert shows the mass spectrum with additional arrows indicating the 3\(\hbox {He}\) and \(^{4}\hbox {He}\) concentrations.
