Cooling apparatus and SQUID microscope using same

摘要

There is disclosed cooling apparatus for cooling a sample or sensor to the neighborhood of the boiling temperature of a liquefied gas by transporting the gas. The cooling apparatus can be run stably such that piping or needle valve acting as a medium for transporting the liquefied gas is not clogged up. The apparatus is so constructed that a gas collection port is installed in a transfer tube and that gas produced by evaporation of the liquefied gas is collected and used as a coolant for a cooling head.