Abstract
As part of the development for the magnet system for the NET (Next European Torus) Tokamak machine (Next European Torus) for fusion research, 40 kA cable-in-conduit type Nb/sub 3/Sn superconductors are being manufactured and tested. A model has been developed for the behavior of strands randomly oriented in a superconducting cable. The model predicts that frictional heating in such cables, due to either transverse magnetic loading or applied longitudinal strain or both combined, is not a significant heat source compared to AC losses. Under typical operational conditions in the ABB cable, with epsilon /sub leff/=0.0015, sigma /sub teff/=6.4 MPa, and an applied external transverse strain to the jacket of -0.0015, the maximum strains predicted in the strands are (with c=4 mm); due to the transverse stress (longitudinal bending) +or-0.3%, due to the longitudinal strain (direct) 0.15%.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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