强磁场中的超导腔
Superconducting cavity in a high magnetic field
摘要：
高Q值微波谐振腔在强磁场中有着广泛的应用前景，特别是在轴子暗物质研究中，可以提高扫描速度。在这封信中，我们介绍了一个与商业YBCO磁带覆盖整个内壁的形谐振腔。我们证明了超导YBCO腔的最大Q因子（TM $_{010}$，6.93 GHz）比铜腔的高约6倍，并且在4 K下直到8 T没有明显的退化。这是高温超导技术在高射频、强磁场中要求低损耗的研究领域的可能应用的第一个迹象。
英文摘要：
A high Q-factor microwave resonator in a high magnetic field could be used in a wide range of applications, especially for enhancing the scanning speed in axion dark matter research. In this letter, we introduce a polygon-shaped resonant cavity with commercial YBCO tapes covering the entire inner wall. We demonstrated that the maximum Q-factor (TM$_{010}$, 6.93 GHz) of the superconducting YBCO cavity was about 6 times higher than that of a copper cavity and showed no significant degradation up to 8 T at 4 K. This is the first indication of the possible applications of HTS technology to the research areas requiring low loss in a strong magnetic field at high radio frequencies.
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