Losses of multifilamentary superconductors with ordinary and alternating twist

As has been shown in previous papers the twist of multifilamentary superconductors gives rise to new coupling losses when the conductor is exposed to pulsed longitudinal magnetic fields. These losses can increase the total conductor losses considerably. For a loss reduction an alternating twist has been proposed by the authors. First conductor samples with alternating twist have been manufactured and magnetization experiments have been performed. The losses of such samples in longitudinal fields show reduced values compared to samples with ordinary twist, in good agreement with the theoretical predictions.