Cryogenics最新文献

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IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2026-01-01

引用次数: 0

Measurement of the thermal conductivity of high-purity aluminum and OFHC copper for the CUPID pulse tube cryocoolers thermal links 用于丘比特脉冲管制冷机热链路的高纯度铝和OFHC铜导热系数的测量

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2025-12-29 DOI: 10.1016/j.cryogenics.2025.104276

F. Agresti , A. Benato , C. Bucci , I. Calliari , A. D’Addabbo , S. D’Eramo , S. Di Lorenzo , S. Fu , P. Gorla , L. Marini , M. Olmi , L. Pezzato , M. Pigato , A. Puiu , S. Quitadamo , A. Zambon

We present a campaign of thermal conductivity measurements of Oxygen Free High Conductivity (OFHC) copper (

>

99.9% purity) and high-purity 5N and 6N aluminum. High-purity aluminum is devoted to replace the current OFHC copper thermal links of the Pulse Tube Cryocoolers (PTC) installed in the

^{3} He

^{4} He

dilution cryostat of the CUORE (Cryogenic Underground Observatory for Rare Events) experiment, in view of the future commissioning of the CUPID (CUORE Upgrade with Particle IDentification) experiment, both dedicated to the search of neutrinoless double beta decay. We perform thermal conductivity measurements on high-purity aluminum (

Al

-5N and

Al

-6N) and OFHC copper samples across the temperature range from 12 K to 45 K, and then extrapolate them down to 3.5 K, namely the minimum temperature achieved by the second stage of the CUORE PTC. We estimated that the thermal conductivity of high-purity aluminum at 3.5 K is up to

≃

17 times higher than that of OFHC copper. However, the measured thermal conductivity of high-purity aluminum has been found to be limited by the boundary thermal resistance ascribed to the oxidation of the aluminum surface. By quantifying and accounting for such contribution, we estimated the actual thermal conductivity of

Al

-6N to be

≃

61 times higher value than that of OFHC copper. These findings suggest that high-purity aluminum thermal links offer a promising solution to meet the stringent requirements of the successor of CUORE, the CUPID experiment, in terms of cooling power enhancement and vibration suppression.

我们提出了一项无氧高导电性（OFHC）铜（纯度>；99.9%）和高纯5N和6N铝的热导率测量运动。高纯铝专门用于取代目前安装在CUORE（低温地下罕见事件观测站）实验3He-4He稀释低温恒温器（PTC）中的脉冲管制冷机（PTC）的OFHC铜热链接，以考虑到丘比特（CUORE升级与粒子识别）实验的未来调试，这两个实验都致力于寻找中微子双β衰变。我们在12 K至45 K的温度范围内对高纯度铝（Al-5N和Al-6N）和OFHC铜样品进行导热系数测量，然后将其外推至3.5 K，即CUORE PTC第二阶段达到的最低温度。我们估计在3.5 K时，高纯度铝的导热系数比OFHC铜的导热系数高17倍。然而，高纯度铝的热导率被发现受到铝表面氧化引起的边界热阻的限制。通过量化和计算这一贡献，我们估计Al-6N的实际导热系数比OFHC铜高61倍。这些发现表明，高纯度铝热链接提供了一个有希望的解决方案，以满足CUORE的继任者丘比特实验在冷却功率增强和振动抑制方面的严格要求。

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引用次数: 0

Design and characterization of an alumina coated helium gas gap heat switch with adjustable gap width 间隙宽度可调的氧化铝包覆氦气间隙热开关的设计与表征

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2025-12-25 DOI: 10.1016/j.cryogenics.2025.104275

Kun Wang , Shuai Ma , Kuifan Zha , Liming Han , Yi Liao , Changzhao Pan

Gas gap heat switches, with the advantages of simple operation, no moving parts, and large switching ratios, are widely applied in helium evaporation refrigerator, adiabatic demagnetization refrigerator, and dilution refrigerator. In this study, a sintered alumina (Al₂O₃) coated helium gas gap heat switch (GGHS) was successfully developed, adopting a concentric copper block structure, where the gap width was precisely controlled by adjusting the thickness of the sintered alumina coating. In the constructed 4 K test system, the thermal conductance, switching temperature, and switching time of the switch were systematically tested, and the results show that when the average temperature of the switch is 30 K, the peak thermal conductance reaches 255 mW/K; at a cold end temperature of 3 K, the OFF and ON state thermal conductance are 0.27 mW/K and 35 mW/K, respectively. Further verification of the switching temperature shows that the theoretical prediction agrees well with the experimental data, confirming the reliability of the theoretical model. In addition, the switch exhibits good dynamic response characteristics, with a switching time of 70 s from OFF state to ON state, and only 17 min required for the adsorption pump to cool during the ON to OFF transition. Finally, to evaluate its practical performance, the heat switch was implemented in a custom-built dilution refrigerator, where the system successfully cooled to 10 mK within 32.5 h. The above study confirms that the sintered alumina coating helium gas gap heat switch provides reliable performance, offering an effective solution for thermal management in cryogenic systems.

气隙热开关具有操作简单、无运动部件、开关比大等优点，广泛应用于氦气蒸发制冷机、绝热退磁制冷机、稀释制冷机等。本研究成功研制了一种烧结氧化铝（Al2O3）涂层氦气间隙热开关（GGHS），采用同心铜块结构，通过调整烧结氧化铝涂层的厚度来精确控制间隙宽度。在搭建的4 K测试系统中，对开关的热导率、开关温度、开关时间进行了系统测试，结果表明：当开关的平均温度为30 K时，热导率峰值达到255 mW/K；冷端温度为3 K时，关闭和打开状态的热导率分别为0.27 mW/K和35 mW/K。对开关温度的进一步验证表明，理论预测与实验数据吻合较好，证实了理论模型的可靠性。此外，该开关具有良好的动态响应特性，从OFF状态切换到ON状态的切换时间为70 s，从ON到OFF过渡过程中吸附泵的冷却时间仅为17 min。最后，为了评估其实际性能，将热开关应用于定制的稀释冰箱中，系统在32.5 h内成功冷却到10 mK。上述研究证实了烧结氧化铝涂层氦气间隙热开关具有可靠的性能，为低温系统的热管理提供了有效的解决方案。

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引用次数: 0

A gravity independent hydrogen heat pipe 一种不依赖重力的氢热管

IF 2.1 3区工程技术 Q3 PHYSICS, APPLIED

Cryogenics

Pub Date : 2025-12-23 DOI: 10.1016/j.cryogenics.2025.104270

Ziyang Hang, John Pfotenhauer, Franklin Miller

A new type of heat pipe called Hybrid Conventional Pulsating Heat Pipe (HCPHP), which works similarly to a conventional heat pipe but retains the advantageous geometry of a pulsating heat pipe, is experimentally verified within the saturated hydrogen temperature range and under horizontal working orientation. The Hydrogen HCPHP shows up to 1.625 W of heat transfer with thermal conductance up to 6.15 W/K and effective thermal conductivity up to 54,621 W/m-K over a 250 mm heat transfer distance. Experimental investigations of the hydrogen HCPHP focus on the condenser temperature, fluid fill ratio, and applied heat load. Thermohydraulic behavior of the Hydrogen HCPHP is analyzed, providing insights into its performance and behavior.

混合常规脉动热管（HCPHP）是一种新型热管，它的工作原理与传统热管相似，但保留了脉动热管的优势几何形状，在饱和氢温度范围内和水平工作方向下进行了实验验证。在250mm的传热距离上，HCPHP的换热量为1.625 W，导热系数为6.15 W/K，有效导热系数为54,621 W/m-K。实验研究主要集中在凝汽器温度、充液比和外加热负荷方面。分析了氢气HCPHP的热液行为，为其性能和行为提供了见解。

引用次数: 0

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