Low-Temperature Thermal Properties from the EU Testing Program for Potential ITER Insulation
Insulation systems will be a key element in the future construction and impregnation of the coils for the ITER device. The thermal contraction and thermal conductivity of ten different electrical insulation systems are measured at temperatures from 4 K to 300 K. Several insulation systems incorporate an electrical barrier layer. The insulation systems are all based on identical S2-glass with various epoxy resins, some of which are not believed to have been previously used in superconducting coils. In particular resins with a high functionality are investigated, some of which are suitable for Vacuum Pressure Impregnation (VPI). The final results of this program are presented and compared to the results from a benchmark testing program (insulation system based on anhydride cured DGEBA resin and S2 glass).
This work is financed by the EU under NET contract ERB 5000 940023 (NET 93–857) within the framwork of ITER
KeywordsAromatic Amine Acid Anhydride Thermal Contraction Insulation System Resin Functionality
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