news IEEE C57.12.90 Dielectric Verification of Retardant Catalyst 1028 in Superconducting Magnet Insulation Layer IEEE C57.12.90 Dielectric Verification of Retardant Catalyst 1028 in Superconducting Magnet Insulat... 03/1913IEEE C57.12.90 Dielectric Verification of Retardant Catalyst 1028 in Superconducting Magnet Insulation Layer