We report the successful manufacture and characterization of a microwave resonant cylindrical cavity made of bulk MgB2 superconductor (Tc = 38.5 K), which has been produced by the Reactive Liquid Mg Infiltration technique. The quality factor of the cavity for the TE011 mode, resonating at 9.79 GHz, has been measured as a function of the temperature. At T = 4.2 K, the unloaded quality factor is 2.2x10^5; it remains of the order of 10^5 up to T ~ 30 K. We discuss the potential performance improvements of microwave cavities built from bulk MgB2 materials produced by reactive liquid Mg infiltration.
@article{arxiv.cond-mat/0612159,
title = {Superconducting Microwave Cavity Made of Bulk MgB2},
author = {G. Giunchi and A. Agliolo Gallitto and G. Bonsignore and M. Bonura and M. Li Vigni},
journal= {arXiv preprint arXiv:cond-mat/0612159},
year = {2007}
}
Comments
7 pages, 2 embedded figures, accepted for publication in Supercond. Sci. Technol