Patent ID: 6389821
Filing Date: 2002-05-21
Classification: F17C,F25B,F25D

Abstract:
A cryostat means for storing liquid helium, comprising:an outer shell; a helium container installed within said outer shell; a neck pipe disposed between and communicating with said outer shell and said helium container, said neck pipe having an upper warm end connected to said outer shell and a lower cold end connected to said helium container, wherein said outer shell, said helium container, and said neck pipe define an evacuated space; a radiation shield disposed within said evacuated space, said radiation shield surrounding said helium container and connected at a coupling to said neck pipe in a heat-conducting manner; a refrigerator having a cold finger with at least one pipe and projecting into said neck pipe; and at least one separating body disposed to surround said at least one pipe, said separating body dividing an inside region of said neck pipe into a first and a second partial volume, wherein said first and said second partial volumes are in fluid communication with another at an upper location and at a lower location.