This explanation would require helium II to have an abnormally low viscosity ... of the liquid in the surrounding Dewar flask. The amount of flow and the pressure were deduced from the difference ...

The most common way of keeping instruments at cryogenic temperatures is to use a reservoir of liquid helium held in an insulated container known as a Dewar. Liquid helium has a temperature of 1 ...

Users can purchase it as a complete system incorporated with superconducting magnets and a liquid helium dewar, or as an independent insert for incorporation into users’ existing equipment. With more ...