Cooling Performance of a Small GM Cryocooler with a New Ceramic Magnetic Regenerator Material
Cooling Performance of a Small GM Cryocooler with a New Ceramic Magnetic Regenerator Material
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采用新型陶瓷磁蓄热体材料的小型通用制冷机的冷却性能
DOI：
10.1007/0-306-47919-2_52
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Numazawa
中科院分区：
文献类型：
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作者：
T. Satoh;T. Numazawa
研制了一种用于4K蓄热式制冷机的新型陶瓷磁蓄冷器材料Gd2O2S(GOS)。本文介绍了GOS小型Gifford-McMahon循环(GM)制冷机制冷性能的实验结果。实验中使用了一台小型GM制冷机，制冷量为0.1W级，温度为4.2K。该制冷机是为低T_c超导器件冷却或用于物性测量等测试样品冷却而研制的，该制冷机由单相100V电力驱动，功耗约为1.2kW(50 Hz)。传统的制冷机二级回热器由铅球和HoCu2球组成。在我们的实验中，用一种新的陶瓷磁再生材料GOS取代了HoCu2的一部分，并测量了其制冷量。用GOS替代部分HoCu2，使其在4.2K下的第二级制冷量提高了20%以上。
A new ceramic magnetic regenerator material Gd2O2S (GOS) has been developed for use in regenerative cryocoolers in the 4 K region. Experimental results of the cooling performance of a small Gifford-McMahon cycle (GM) cryocooler with GOS are described in this paper. A small GM cryocooler with 0.l W-class cooling capacity at 4.2 K was used in the experiments. The cryocooler has been developed for low-Tcsuperconducting device cooling or test sample cooling for physical property measurements, etc. The cryocooler is driven by single phase 100V electricity and the power consumption is about 1.2 kW (50 Hz). The conventional second-stage regenerator of the cryocooler is composed of lead spheres and HoCu2spheres. In our experiments, a part of HoCu2was replaced with a new ceramic magnetic regenerator material GOS and the cooling capacity was measured. The second-stage cooling capacity at 4.2 K was improved by more than 20% by replacing a part of the HoCu2with GOS.