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A cryogenic high pressure cell for inelastic neutron scattering measurements of quantum fluids and solids

机译:一种低温高压电池,用于量子流体和固体的非弹性中子散射测量

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We present our new development of a high pressure cell for inelastic neutron scattering measurements of helium at ultra-low temperatures. The cell has a large sample volume of ∼140 cm3 and a working pressure of ∼7 MPa, with a relatively thin wall-thickness (1.1 mm)—thanks to the high yield strength aluminum used in the design. Two variants of this cell have been developed. The first cell is permanently joined components using electron-beam welding and explosion welding, methods that have little or no impact on the global heat treatment of the cell. The second cell discussed has modular and interchangeable components, which includes a capacitance pressure gauge, that can be sealed using the traditional indium wire technique. The performance of the cells have been tested in recent measurements on superfluid liquid helium near the solidification line.
机译:我们介绍了高压电池的最新进展,该高压电池用于在超低温下对氦进行非弹性中子散射测量。该样品池的样品体积约为140 cm 3 ,工作压力约为7 MPa,壁厚相对较薄(1.1 mm),这要归功于电解槽中使用的高屈服强度铝。设计。已经开发出该细胞的两种变体。第一个电池是使用电子束焊接和爆炸焊接永久连接的组件,这些方法对电池的整体热处理几乎没有影响。讨论的第二个电池具有模块化和可互换的组件,其中包括一个电容压力表,可以使用传统的铟丝技术将其密封。在最近对凝固线附近的超流体液氦进行的测量中,已经测试了电池的性能。

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