Integration of superconducting magnets with cryogen-free dilution refrigerator systems
Integration of superconducting magnets with cryogen-free dilution refrigerator systems
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DOI：
10.1016/j.cryogenics.2009.09.008
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发表时间：
2009-12-01
期刊：
影响因子：
2.1
通讯作者：
Twin, A.
中科院分区：
文献类型：
--
作者：
Batey, G.;Buehler, M.;Twin, A.
近年来，人们对“无冷冻剂”稀释制冷机产生了很大的研究兴趣。从安全和方便的角度来看，无冷冻剂系统具有一些优点，因为不需要液体冷冻剂。然而，这也使得低温系统与高磁场环境的集成更具挑战性。在这里，我们将描述最近的成功集成超导磁体和稀释制冷机到一个系统，需要一个单一的脉冲管冷却器。由此产生的环境提供了7 mK和30 K之间的实验温度和高达12 T的磁场。我们将描述当磁场斜升时，这种系统中交流损耗加热对脉冲管制冷机的影响，以及涡流加热对扫掠磁场中混合室的影响。(C)2009爱思唯尔有限公司版权所有。
There has been much recent research interest into "cryogen-free" dilution refrigerators. Cryogen-free systems have some advantages from a safety and convenience point of view as liquid cryogens are unnecessary. However, this also makes integrating the low-temperature system with a high magnetic field environment much more challenging. Here we shall describe recent successes of integrating superconducting magnets and dilution refrigerators into one system requiring a single pulse tube cooler. The resulting environment provides experimental temperatures between 7 mK and 30 K and magnetic fields up to 12 T. We shall describe the effects of AC loss heating in such systems on the pulse tube refrigerator when the field is ramped and also the effects of eddy current heating on the mixing chamber in sweeping fields. (C) 2009 Elsevier Ltd. All rights reserved.