Circulating cryostat
First Claim
1. 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.
2 Assignments
0 Petitions
Accused Products
Abstract
A cryostat arrangement for keeping liquid helium comprising an outer shell (2), a helium container (6) installed therein and a neck pipe (4) extending from the helium container to the outer shell whose upper warm end is connected to the outer shell and whose lower cold end is connected to the helium container, wherein the outer shell, the helium container and the neck pipe define an evacuated space (13) containing a radiation shield (15) surrounding the helium container and being connected at a coupling to the neck pipe in a heat-conducting fashion, wherein a refrigerator is installed in the neck pipe having a cold finger (5a) which consists of at least one pipe and projects into the neck pipe, is characterized in that at least one pipe of the cold finger is surrounded by at least one separating body (3a) which divides the neck pipe into two partial volumes (8a and 9a) which are connected to one another through a lower opening (10a) and an upper opening (7a). A cryostat arrangement of this type with active cooling through refrigerators shows considerable improvements over conventional cryostats with respect to thermal properties. In particular, it is possible to completely stop consumption of liquid helium.
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Citations
13 Claims
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1. A cryostat means for storing liquid helium, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification