Abstract: The invention relates to a device for generating a CO2 snow jet, comprising an expansion channel (6) which extends in a flow direction (14) for generating a CO2 gas/CO2 snow mixture based on liquid CO2, said expansion channel having an inlet opening (18) for supplying liquid CO2 and an outlet opening (22) for discharging the CO2 gas/CO2 snow mixture. The device also comprises a nozzle for generating an outer jet which surrounds and accelerates the CO2 gas/CO2 snow mixture discharged from the outlet opening of the expansion channel.