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Roach 1 DEVELOPMENT AND CHARACTERIZATION OF THIN FILM SUPERCONDUCTING RADIO FREQUENCY SURFACES FOR ACCELERATOR CAVITIES

Superconducting thin films have the potential to improve the performance of particle accelerators. Before these thin films can be implemented, a systematic study on structureproperty correlations is necessary. Here, we present the characterization of niobium thin films deposited onto both ceramic and metallic substrates. In particular, the film microstructure and superconducting properties are examined. Our findings show that the strain and crystallographic orientation of niobium films can adversely impact the transition between the superconducting and normal state as well as the lower critical field.