利用三维集总元件微波腔表征3D打印超导铌的低温材料特性
Characterisation of Cryogenic Material Properties of 3D-Printed Superconducting Niobium using a 3D Lumped Element Microwave Cavity
AI总结：
本研究通过将3D打印铌柱插入铝腔构成重入式微波谐振器，测量其低温品质因数并结合有限元分析，提取出表面电阻为3.1×10⁻⁴ Ω，验证了3D打印铌的超导性能与传统机加工铌相当，并提出了一种适用于小尺寸超导样品材料特性表征的简便新方法。
摘要：
我们展示了对3D打印铌电学特性的实验表征。该研究通过将一个3D打印的铌柱插入铝制圆柱腔中，形成一个三维集总元件重入式微波腔谐振器。将该谐振器冷却至铌的临界温度（9.25K）以下，随后冷却至铝的临界温度（1.2K）以下，同时测量电磁谐振的品质因数。随后将其与腔体的有限元分析结果，以及对具有相似尺寸和频率的铝柱在同一腔体中的测量结果进行比较，以提取铌柱的表面电阻。该3D打印铌在与其常规铌相似的温度下表现出向超导态的转变，并且表面电阻为$3.1\ imes10^{-4}$ $Ω$。该值与许多先前研究的、未经专门表面处理的传统机械加工铌样品相当。此外，本研究展示了一种简单的新方法，用于表征相对较小且几何形状简单的超导体样品的材料特性，该方法可轻松应用于其他材料，尤其是3D打印材料。增材制造领域的进一步研究与开发，可能会使3D打印铌不仅应用于超导腔设计中，而且应用于未来的创新技术中。
英文摘要：
We present an experimental characterisation of the electrical properties of 3D-printed Niobium. The study was performed by inserting a 3D-printed Nb post inside an Aluminium cylindrical cavity, forming a 3D lumped element re-entrant microwave cavity resonator. The resonator was cooled to temperatures below the critical temperature of Niobium (9.25K) and then Aluminium (1.2K), while measuring the quality factors of the electromagnetic resonances. This was then compared with finite element analysis of the cavity and a measurement of the same cavity with an Aluminium post of similar dimensions and frequency, to extract the surface resistance of the Niobium post. The 3D-printed Niobium exhibited a transition to the superconducting state at a similar temperature to the regular Niobium, as well as a surface resistance of $3.1\times10^{-4}$ $Ω$. This value was comparable to many samples of traditionally machined Niobium previously studied without specialised surface treatment. Furthermore, this study demonstrates a simple new method for characterizing the material properties of a relatively small and geometrically simple sample of superconductor, which could be easily applied to other materials, particularly 3D-printed materials. Further research and development in additive manufacturing may see the application of 3D-printed Niobium in not only superconducting cavity designs, but in the innovative technology of the future.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
