探測Axion(軸子)是需要在低溫(30mk)及強磁場(9T)的環境中量測，而量測的方式是藉由共振腔來讀取訊號源。因為在強磁場的環境下量測，我們必須要避免材料產生相對應的磁力來保護降溫設備不會在磁鐵失超時受到損害，所以在材料的選擇上必須要去避免使用大體積的銅，因此選擇使用不鏽鋼316來製作共振腔。但因為不鏽鋼的熱傳導比銅差非常多，導致降溫時間大幅增加，其解決辦法是在表面鍍上一層薄銅來增加熱傳導率。這篇論文主要是去探討在低溫環境下不鏽鋼鍍上銅後的熱傳導率提升了多少，用以協助了解在未來需要鍍上多厚的銅能滿足實驗需求，及利用鍍銅讓共振腔能夠達到更低溫的實驗環境來協助軸子量測。

Detecting Axions requires measurements in an environment with low temperatures (30 mK) and strong magnetic fields (9T). The detection method uses a resonant cavity to read the signal source. In such a strong magnetic field, it is important to avoid using materials that create magnetic forces, which could damage the cooling system if the magnet fails. Therefore, stainless steel 316 was chosen to build the resonant cavity instead of using large amounts of copper. However, stainless steel has much lower thermal conductivity compared to copper, which makes the cooling process take much longer. To solve this problem, a thin layer of copper was coated on the surface to improve thermal conductivity. This study focuses on how much the thermal conductivity of stainless steel improves after copper coating in low-temperature environments. It also aims to find out how thick the copper layer needs to be to meet experimental requirements and to help the resonant cavity reach lower temperatures for better Axion detection.

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