Abstract
We have experimentally observed dramatic reductions in the microwave surface resistance R s of superconducting aluminum thin films due to microwave pumping. For temperatures T > 0.97 T c , nearly complete suppression of the temperature-dependent component of R s occurred when the films were subjected to a microwave magnetic field s were observed before the transition to the normal state. The reduction of R s may provide stability against thermal breakdown in rf cavities currently limited by defect-nucleated quench.
Published Version
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