#$%^&*AU2011202862B220130613.pdf#####ABSTRACT A system for cooling an object with a cryogen having a critical point defined by a critical-point pressure and a critical-point temperature, the system comprising: means for raising a pressure of the cryogen above a pressure value determined to provide 5 the cryogen at a reduced molar volume that prevents vapor lock and means for thereafter placing the cryogen in thermal communication with the object to increase a temperature of the cryogen along a thermodynamic path that maintains a pressure greater than determined pressure value for a duration that the cryogen and object are in thermal communication.
