Nuclear refrigeration of liquid He3 |
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| Authors: | AI Ahonen PM Berglund MT Haikala M Kruisius OV Lounasmaa MA Paalanen |
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| Affiliation: | The authors are with the Low Temperature Laboratory, Helsinki University of Technology, 02150 Espoo, Finland |
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| Abstract: | A nuclear demagnetization cryostat in which liquid He3 has been successfully cooled below 0.7 mK is described. After a general discussion on nuclear refrigeration the essential parts of the apparatus and its operation and performance are explained. The important detail of how to measure the temperature of He3 is also described. The paper is concluded with suggestions for future improvements. |
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