โ Scribed by G.T. Mallick Jr; W.J. Carr Jr; J.M. Toms; V.T. Kovachev
No coin nor oath required. For personal study only.
Eddy currents induced in magnet cables have long been recognized as contributing to the quench performance of superconducting accelerator magnets, and are thought to be a major contributor to degraded performance in the superconducting super collider (SSC) dipole magnets. There are several major paths which these currents might follow, however, and each path has an effect. We have experimentally isolated these several contributions and estimated their relative importance. The experimental observations support the recent theoretical predictions of Carr and Kovachev. The well known 'crossover resistance' is the most important component. In samples with very low crossover resistance, a quench was observed in the absence of transport current. A long time constant of the order of several seconds was observed for the build-up of eddy currents on cable samples which had very low crossover resistances and were only slightly longer than two twist-pitch lengths.
๐ SIMILAR VOLUMES
A continuum model is used to calculate the interstrand eddy current loss in the Superconducting Supercollider (SSC) magnets, and expressions are derived for the conductivities. An advantage of the model is that three contributions to the loss can be investigated separately: (1) the contribution of c
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