Advanced Diagnostic Techniques for Superconductors in High Frequency Fields — Yesterday, Today, and Tomorrow

Diagnostic techniques to analyse the performance of superconducting surfaces in high-frequency fields were decisive for the development of superconducting particle accelerators. They also play an important role for the application of HTS films in emerging products. We describe experimental methods for the measurement of critical current, temperature, and microwave surface resistance of HTS films as used today, and give first results on the local analysis of these quantities using scanning hall and scanning laser probe techniques.

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