Evaluation of the cryogenic mechanical properties of the insulation material for ITER Feeder superconducting joint

[摘要] The Glass-fiber reinforced plastic (GFRP) fabricated by the vacuum bag process was selected as the high voltage electrical insulation and mechanical support for the superconducting joints and the current leads for the ITER Feeder system. To evaluate the cryogenic mechanical properties of the GFRP, the mechanical properties such as the short beam strength (SBS), the tensile strength and the fatigue fracture strength after 30,000 cycles, were measured at 77K in this study. The results demonstrated that the GFRP met the design requirements of ITER.

[发布机构] Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing; 100190, China^1;China Electric Power Research Institute, Beijing; 100192, China^2;Institute of Plasma Physics, Chinese Academy of Sciences, Hefei; 230031, China^3

[关键词] Current leads;Feeder system;High voltage;Insulation materials;Mechanical support;Short beam strengths;Superconducting joints;Vacuum bag process