Cold screen of cryogenic pump

The utility model relates to a low -temperature vacuum technical field, in particular to cold screen of cryogenic pump, including the cold screen body of cask form, the barrel head of cold screen body is fixed on cryocooler's cold head, and the bucket wall and/or the barrel head orientation bucket intracavity side of cold screen body are provided with the arch. It has had great increase to set up the protruding surface area of feasible cold screen later, just also increases the condensation area of contact that the cryogenic pump was personally experienced sth. Part of the body to bleeding, and the clearance between the while arch has promoted collision route and the number of times of the body with the condensing surface of being bled, has increased the probability of catching of being personally experienced sth. Part of the body to bleeding to effectual promotion cryogenic pump is to the pumping speed of the body of being bled.