Investigation of the Mechanical and Electrical Properties of Superconducting Coils
Measurement of elastic(Young’s) modulus of the superconducting coil and electrical punch-through test have been performed at LBL1 to understand the mechanical and electrical properties of the superconducting coils. We have investigated the elastic modulus of the superconducting coils with six kinds of insulators (made with polyimide-fiberglass-epoxy and all polyimide insulation with epoxy/polyimide adhesive) at room and liquid nitrogen temperatures using samples made of 10 stack of superconducting cables. The samples are cured under varying compression to investigate the curing pressure dependence of Young’s modulus of the coils with six kinds of the insulation system. The electrical punch-through test has also performed under compression at room and liquid nitrogen temperatures to investigate electrical integrity of the insulated coils. The tensile strength test of four kinds of polyimide films has been performed at various temperatures (between cryogenic and coil curing temperatures) to understand the mechanical properties of the films.
KeywordsLiquid Nitrogen Temperature Tensile Elongation Liquid Helium Temperature Polyimide Film Insulation System
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