A miniature dilution refrigerator for sub-Kelvin detector arrays
A miniature dilution refrigerator for sub-Kelvin detector arrays
复制标题
用于亚开尔文探测器阵列的微型稀释制冷机
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
L. Piccirillo
中科院分区：
文献类型：
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作者：
G. Teleberg;S. Chase;L. Piccirillo
我们描述了一种微型稀释冰箱（MDR），在连续模式下运行，适用于温度低至50 mK的许多探测器应用。它与其他冰箱的区别在于它是独立的，并受益于3He气体的内部循环。因此，不需要外部气体处理系统，因此大大降低了系统的尺寸、重量和复杂性。该系统没有精细的毛细血管、活动部件或冷却的o形环。因此，它在机械上非常可靠，没有堵塞的风险，也不太可能发生低温泄漏。一个直接的应用是利用大型探测器阵列在气球上或地面上对CMB进行观测。当这些实验在平台上或在基础设施和维护支持有限的地点远程操作时，一个紧凑可靠的稀释冰箱变得必不可少。我们描述了一个包含MDR的完整系统，我们已经构建并集成了一个脉管制冷机，以实现100 mK时几微瓦的冷却功率。该系统正在开发用于CMB偏振实验（CLOVER），该实验需要三个独立的低温恒温器来冷却大型TES探测器阵列。
We describe a miniature dilution refrigerator (MDR), operated in continuous mode and suitable for many detector applications at temperatures down to 50 mK. It distinguishes itself from other refrigerators in that it is self-contained and benefits from an internal cycle of the 3He gas. As a result, no external gas handling system is required so size, weight and complexity of the system is dramatically decreased. The system has no fine capillaries, moving parts or cooled O-rings. It is therefore mechanically very reliable, has no risk of blockages and is unlikely to develop cryogenic leaks. One direct application is balloon-borne or ground-based observations of the CMB using large detector arrays. When these experiments are operated remotely on platforms or at sites with limited infrastructure and maintenance support, a compact and reliable dilution refrigerator becomes essential. We describe a complete system incorporating an MDR which we have built and integrated with a pulse-tube refrigerator to achieve a cooling power of several micro Watt at 100 mK. This system is being developed for a CMB polarization experiment (CLOVER) which requires three independent cryostats to cool large TES detector arrays.