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 2.2 x 10^5; 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.
GIUNCHI G, AGLIOLO GALLITTO A, BONSIGNORE G, BONURA M, LI VIGNI M (2007). A superconducting microwave cavity made of bulk MgB2. SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 20(4), L16-L19 [10.1088/0953-2048/20/4/L03].
A superconducting microwave cavity made of bulk MgB2
AGLIOLO GALLITTO, Aurelio;BONSIGNORE, Gaetano;BONURA, Marco;LI VIGNI, Maria
2007-01-01
Abstract
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 2.2 x 10^5; 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.
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