Energy Dissipation in Superconducting Materials

The use of superconducting materials in many motors, machines, and power transmission lines has led to great increases in efficiency, reduction in the use of materials, and therefore of cost. The design of such machinery is dependent on certain physical properties peculiar to superconducting materials. One major area of engineering interest is the problem of energy dissipation in AC fields, the subject of this book. After a brief description of the types of machine and materials, Dr Kovachev discusses the properties of so-called "Type II Superconductors", experimental techniques for measuring energy dissipation, surface conditions, surface barriers, temperature and field dependence, and finishes with a discussion of some real systems.Table of ContentSome aspects of the mixed state of type II superconductors; Experimental techniques for the study of dissipation; Measurement techniques; Investigated samples; The surface of the superconductor and dissipation; Surface shielding field; Temperature dependence of the dissipation; Dissipation under superposed ac and dc magnetic fields; Dissipation and critical current in technical tapes based on Nb 3 Sn tapes; Dissipation in superconducting laves phase compounds, niobium nitride. and a new high Tc material; Energy dissipation in advanced composite superconductors.