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首页> 外文期刊>Chinese science bulletin >A separate two-stage pulse tube cooler working at liquid helium temperature
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A separate two-stage pulse tube cooler working at liquid helium temperature

机译：在液氦温度下工作的独立的两级脉冲管冷却器

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摘要

A novel 4 K separate two-stage pulse tube cooler (PTC) was designed and tested. The cooler consists of two separate pulse tube coolers, in which the cold end of the first stage regenerator is thermally connected with the middle part of the second regenerator. Compared to the traditional coupled multi-stage pulse tube cooler, the mutual interference between stages cSn be significantly eliminated. The lowest refrigeration temperature obtained at the first stage pulse tube was 13.8 K. This is a new record for single stage PTC. With two compressors and two rotary valves driving mode, the separate two-stage PTC obtained a refrigeration temperature of 2.5 K at the second stage. Cooling capacities of 508 mW at 4.2 K and 15 W at 37.5 K were achieved simultaneously. A one-compressor and one-rotary valve driving mode has been proposed to further simplify the structure of separate type PTC.
机译：设计并测试了新颖的4 K分离式两级脉冲管冷却器（PTC）。该冷却器由两个单独的脉冲管冷却器组成，其中第一级蓄热室的冷端与第二蓄热室的中部热连接。与传统的耦合式多级脉冲管冷却器相比，级数cSn之间的相互干扰得以显着消除。在第一级脉冲管中获得的最低制冷温度为13.8K。这是单级PTC的新记录。在使用两个压缩机和两个旋转阀的驱动模式的情况下，独立的两级PTC在第二级的制冷温度为2.5K。同时实现了4.2 K时508 mW的制冷能力和37.5 K时的15 W的制冷能力。为了进一步简化分离型PTC的结构，提出了单压缩机单旋转阀的驱动方式。

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