MgB2超导体圆柱腔体的微波响应
Microwave response of a cylindrical cavity made of bulk MgB2 superconductor
摘要：
我们报告的谐振圆柱形腔的微波特性的大块MgB 2超导体，由反应液体Mg渗透过程中产生的。在5- 13 GHz范围内测量了谐振腔的频率响应。在各种模式中，TE 011，谐振频率为9.79 GHz，具有最高的品质因数。对于这种模式，我们已经确定了品质因数的温度依赖性，在4.2- 30 K的温度范围内获得了10^5数量级的值。从测量的品质因数推导出的表面电阻的值同意相当好的那些独立测量的小样品的MgB 2提取从同一标本的腔已经获得。
英文摘要：
We report on the microwave properties of a resonant cylindrical cavity made of bulk MgB2 superconductor, produced by the reactive liquid Mg infiltration process. The frequency response of the cavity has been measured in the range 5-13GHz. Among the various modes, the TE011, resonating at 9.79GHz, exhibits the highest quality factor. For this mode, we have determined the temperature dependence of the quality factor, obtaining values of the order of 10^5 in the temperature range 4.2-30K. The values of the surface resistance deduced from the measurements of the quality factor agree quite well with those independently measured in a small sample of MgB2 extracted from the same specimen from which the cavity has been obtained.
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