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1)  liquid helium four
液氦 4
2)   ̄4He mass spectrum
氦-4质谱
3)  Liquid helium
液氦
1.
Theoretical research on shock compression properties of liquid helium at high temperature and density;
高温高密度液氦冲击压缩特性理论研究
2.
Influence factors on separate two-stage pulse tube cooler working at liquid helium temperature;
液氦温区分离型脉管制冷机性能影响因素
3.
Comparison of calculation methods of limit of superheat temperature of liquid helium;
液氦极限过热度计算方法比较
4)  Helium-3 and Helium-4 Mixtures
氦-3/氦-4混合工质
1.
Thermodynamic Property of Helium-3 and Pulse Tube Refrigeration with Helium-3 and Helium-4 Mixtures;
氦-3热力学性质和氦-3/氦-4混合工质脉管制冷性质研究
5)  3He-4He dilution refrigeration
氦3-氦4稀释制冷
6)  helium purification
液氦纯化
1.
Taking helium purification as an example,filtration and regeneration methods of metal mesh were put forward based on the technologies at home and aboard,and several filtration models were compared.
并以液氦纯化为例,在总结国内外技术的基础上提出了金属丝网过滤及再生方案,并比较了现有的过滤模型,指出应用于液氦纯化时需要改进随机函数并考虑沉积的不稳定性的影响。
2.
Taking helium purification in aerospace as an example,the filtration and regeneration methods of metal wiremesh filter were put forward.
以太空条件下的液氦纯化为例,详细介绍了采用金属丝网过滤技术的液氦纯化系统,提出了过滤及再生方案,探讨了各过滤参数对过滤效率的影响,为进一步的试验论证提供参考。
补充资料:氦质谱检漏仪
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性质:用氦气作示漏气体,以气体分析仪检测氦气而进行检漏的质谱仪。氦气的本底噪声低,分子量及黏滞系数小,因而易通过漏孔并易扩散;另外,氦系惰性气体,不腐蚀设备,故常用氦作示漏气体。将这种气体喷到接有气体分析仪(调整到仅对氦起反应的工作状态)的被检容器上,若容器有漏孔,则分析仪即有所反应,从而可知漏孔所在及漏气量大小。

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