Advances in Cryogenic Engineering Materials : Part A by K. Tachikawa (auth.), R. P. Reed, F. R. Fickett (eds.)

By K. Tachikawa (auth.), R. P. Reed, F. R. Fickett (eds.)

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Each of width A. Since the summation width has been reduced from that of the whole sample to A, the variance of the sets of critical currents will increase. If the sample is homogeneous on a scale larger than A. then in the definition of A. we have already accounted for all current exchange. and so the current flow is completely described by an appropriate distribution of series arrays of the form described. Thus the dynamic response of the WLN is determined by a summation of range A over the global critical current distribution.

So far we have presented a qualitative argument for the existence. for a pinning array In the resistive or dynamic state. of regions within which the electric field is zero (phase-locked regions) separated by channels or paths along which vortex motion occurs. Treatments of weak link networks (WLN) are usually based on consideration of the static energy Hamiltonian of an array of coupled loops containing two or more weak links. The derivation of the dynamic characteristics of such networks has proved intractable.

S. Department of Energy Advances in Cryogenic Engineering (Materials), Vol. 36 Edited by R. P. Reed and F. R. Fickett Plenum Press, New York, 1990 27 the Collider operation. S There are now other published reports that record similar behavior in Superconducting Super Collider SSC model dipole magnets 9 and Hadron-Electron Ring Accelerator HERA magnets 10. Kuchnir11 et al. have recently reported on flux creep measurements on the TEVATRON dipole cable. 3%. In this paper, we report on magnetization measurements as a function of time for NbTi and NbaSn multifilamentary wires in transverse applied fields.

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