A Static Magnetic Refrigerator for Superfluid Helium with New Heat Switches and a Superconducting Pulse Coil
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概要
- 論文の詳細を見る
A new magnetic refrigerator is proposed which can produce and preserve superfluid helium with high reliability and efficiency. This paper describes the design of the refrigerator and presents the results of experimental tests using a model refrigerator. The refrigerator is designed to give a Carnot cycle in a temperature range of 1.8-4.2 K. Gadolinium gallium garnet (GGG) is employed as the working substance, and new heat switches which have no moving parts and make use of differences in the heat transfer rates in the various heat transfer modes of a fluid are used. The working substance ismagnetized and demagnetized by means of a superconducting pulse coil. A useful cooling power of about 0.6 W was obtained at 1.80 K. The calculated and experimental results verify that the magnetic refrigerator can, in principle, stably and continuously produce and maintain superfluid helium.
- 社団法人応用物理学会の論文
- 1985-11-20
著者
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Ogata Hisanao
Mechanical Engineering Research Laboratory Hitachi Lid.
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Ogata Hisanao
Mechanical Engineering Research Laboratory Hitachi Ltd.
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HAKURAKU Yoshinori
Department of Electronics, Kagoshima University
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Hakuraku Y
Department Of Electronics Kagoshima University
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Hakuraku Yoshinori
Mechanical Engineering Research Laboratory Hitachi Lid.
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