Losses in 23 strands NbTi and Nb<inf>3</inf>Sn flat cables

Abstract

Losses in different samples made of 23 strands multifilamentary NbTi and Nb <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> Sn Rutheford type superconducting cables in pulsed magnetic fields were measured using the magnetization technique. Two technologies were used for sample preparation. One reason for this was to simulate the different winding structure of the pulsed magnets. Another reason was to obtain the samples with different average transverse resistivity across the unsoldered cable. For comparison, one sample, having the extremely low average transverse resistivity, was made of the soldered cable. The influence of the cable pieces length, used for samples, on the rate dependend losses is demonstrated. Some problems concerning the measurement of the time constent of the rate dependend magnetization are discussed.