Magnesium diboride (MgB₂) is considered a potential material for superconducting radio frequency cavities. MgB₂-coated Cu cavity will allow for a higher operational temperature than a bulk Nb cavity because of the higher transition temperature of MgB₂ and the high thermal conductivity of Cu. Using the hybrid physical chemical vapor deposition technique, MgB₂ coatings were successfully achieved on the inner wall of 3-GHz Cu cavities. The surface and superconducting properties of the coatings were characterized using small samples on Cu plugs mounted at different locations of mock cavities. RF measurement of a MgB₂-coated single-cell 3-GHz test cavity was carried out, and it showed superconducting transition at 36 K. The quality factor of this test cavity was lower than expected due to poor connectivity and inclusion of Mg–Cu alloy in the MgB₂ coating.

二硼化镁（MgB ₂）被认为是超导射频腔的潜在材料。的MgB ₂涂层的Cu空腔将允许比因为硼化镁的较高转变温度的体积的Nb空腔的较高的操作温度₂和Cu的高热导率。使用混合物理化学气相沉积技术，在3 GHz Cu腔的内壁上成功实现了MgB ₂涂层。使用安装在模拟腔体不同位置的铜塞上的小样品来表征涂层的表面和超导性能。MgB _2的射频测量进行了单层3 GHz镀膜单腔测试，在36 K时显示出超导转变。由于连接性差以及MgB ₂涂层中含有Mg-Cu合金，该测试腔的品质因数低于预期。