WERKWIJZE VOOR HET BEREIDEN VAN SUPERFLUIDE HELIUM, EN INRICHTING VOOR HET UITVOEREN VAN DE WERKWIJZE.

摘要

A bath of helium-4 is cooled to a temperature below the lambda point so as to convert the lower portion of the bath to a superfluid-helium zone. A narrow stream between a top and a bottom portion of the zone is subjected to a critical heat flux corresponding to a temperature gradient by cooling the bath in the bottom portion of the superfluid-helium zone, the temperatures thus attainable being considerably lower than the lambda transition point.