短稳标准高Q值超导腔的研究

Design of A Superconducting Microwave Cavity with High Quality Factor for Frequency Standard

针对频率标准用超导腔的设计，通过理论分析及编程计算得到了影响微波腔指标的参数，并对不同温度下微波腔的品质因数（Q值）进行计算得到了温度变化曲线，通过此曲线可以确定达到指标所需要的温度。所设计的微波腔参数为：工作模式为TM010模式，直径D为60mm，高度1为50mm，频率为4．4GHz，Q值在液氦温度4．2K时达到3．9×10^7，在减压降温到2K时达到1．9×10^9，实验结果与计算结果吻合。

To design a superconducting cavity with high quality factor for frequency standard, the parameters that affect the ability of the cavity are all achieved through theory analysis and computer program. A curve through which the temperature can be achieved for the aim is got through calculating the quality factor in different temperature. The parameters of cavity are as follows ： the mode is TM010, the diameter is 60 mm, the height is 50 mm, the frequency is 4. 4 GHz, the quality factor is 3.9×10^7 and 1.9×10^9 when the temperature is 4. 2 K and 2 K, respectively, which is close to the calculation.