Patent ID: 7370481

Claim:
A method of cooling a super conductive body comprising the steps of: depressurizing a gaseous phase of liquid nitrogen contained in an adiabatic vessel to vaporize the nitrogen in a liquid phase to lower the temperature of the nitrogen to or below the triple point of nitrogen; withdrawing the liquid nitrogen in the vessel with an ejector disposed in a portion of the adiabatic vessel where the gaseous phase of nitrogen exists; colliding and mixing the withdrawn liquid nitrogen with a cooling agent sprayed at a high pressure to produce solid nitrogen at the triple point; transforming the produced solid nitrogen into slush nitrogen in the adiabatic vessel; providing a super conductive body formed of a material that exhibits a state of super conductance in the vicinity of the temperature of liquid nitrogen or of the temperature where liquid nitrogen and solid nitrogen coexist; and contacting the super conductive body with the slush nitrogen to cool the super conductive body.