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Circulating cryostat

  • US 6,389,821 B2
  • Filed: 06/28/2001
  • Issued: 05/21/2002
  • Est. Priority Date: 07/08/2000
  • Status: Expired due to Term
First Claim
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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.

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