A COMPACT DILUTION REFRIGERATOR WITH VERTICAL HEAT-EXCHANGERS FOR OPERATION TO 2 MK
A COMPACT DILUTION REFRIGERATOR WITH VERTICAL HEAT-EXCHANGERS FOR OPERATION TO 2 MK
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DOI：
10.1007/bf00683626
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发表时间：
1991-06-01
影响因子：
2
通讯作者：
WARD, MG
中科院分区：
文献类型：
--
作者：
BUNKOV, YM;GUENAULT, AM;WARD, MG
我们描述了一个紧凑的设计稀释冰箱紧密包装，垂直热交换器。冰箱达到2mK的温度，很容易构造，因为烧结热交换器是直单元。在混合室中使用振动丝谐振器作为诊断工具，它既可以作为温度计，也可以作为相界液位指示器。在垂直布置上存在一个设计问题，即浓相侧的贮槽会慢慢被稀相填满，降低性能。通过超泄漏将任何收集的稀相中的超流体He-4组分排入混合室，即可解决该问题。
We describe a compactly designed dilution refrigerator with closely packed, vertical heat exchangers. The refrigerator reaches a temperature of 2mK and is easily constructed, since the sintered heat exchangers are straight units. Vibrating wire resonators are employed in the mixing chamber as diagnostic tools, which may act as both thermometers and phase-boundary level indicators. There is a design problem in the vertical arrangement, namely, the sumps on the concentrated phase side that can slowly fill with dilute phase and degrade the performance. The problem is solved by draining the superfluid He-4 component in any collected dilute phase through superleaks into the mixing chamber.