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Design of a race-track coil for measurements of AC power losses in high-temperature superconducting tapes

Trojanowski S., Ciszek M., Maievskyi E.

Metrology and Measurement Systems

2014

Vol. 21, nr 2

293--304

One of the most important parameters, crucial to applications of superconductors in cryo-electrotechnique, is power loss. Measurements of losses in superconducting long sample wires require AC magnetic fields of a special geometry and appropriate high homogeneity. In the paper part of the theoretical basis for calculations and a simple design method for a race-track coil set are presented. An example of such home-made coils, with a magnetic field uniformity of about 0.2 % over the range of about 8 cm, is given. Also a simple electronic measurement system for the determination of AC magnetization loss in samples of superconducting tapes is presented.