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 (TM010, 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.
@article{arxiv.2002.08769,
title = {Superconducting cavity in a high magnetic field},
author = {Danho Ahn and Ohjoon Kwon and Woohyun Chung and Wonjun Jang and Doyu Lee and Jhinhwan Lee and Sung Woo Youn and Dojun Youm and Yannis K. Semertzidis},
journal= {arXiv preprint arXiv:2002.08769},
year = {2020}
}
Comments
5 pages, 6 figures. arXiv admin note: text overlap with arXiv:1904.05111