Effect of low temperature irradiation on the mechanical strength of organic insulators for superconducting magnets

✍ Scribed by S. Takamura; T. Kato

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 310 KB
• Volume: 20
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(80)90074-0

✦ Synopsis

Organic insulators, such as polyimide, epoxy resins and fibre reinforced epoxies, are irradiated in the fission reactor at about 5 K and the mechanical properties are measured in liquid helium and in liquid nitrogen without warm up. At very low temperatures, the materials are completely brittle.

After irradiation of the absorbed dose of 1. lx 109 rad at about 5 K, the breaking stress of epoxy resins reduces by 30 ~ 40% and FRP and polyimide exhibit a slight decrease in the mechanical strength. FRP and polyimide have good radiation resistance with respect to the mechanical behaviour after a dose of ~lx 109 rad as compared with other selected organic materials.