Effect of substrate magnetism on the ac loss of high temperature superconductor tape-wound coils
作者： J H Claassen
DOI: 10.1088/0953-2048/20/1/006
关键词: Flux pumping 、 Magnetism 、 Magnetic core 、 Magnetic reactance 、 Electromagnet 、 Condensed matter physics 、 Flux pinning 、 Materials science 、 Diamagnetism 、 Magnetic energy
摘要: Magnetism can affect losses in superconducting coils two ways. First, there is magnetic loss ('core loss'). This be separately measured as a function of induction the material interest (usually substrate on which film grown). One then find fields coil when current applied and calculate loss. A second mechanism, has not been previously addressed, an enhancement ac superconductor itself due to increases local fields. contribution depends permeability material. Both contributions are calculated for specific geometry using properties NiW alloy. In this example it found that latter significantly larger than former.
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