Abstract
A super radiation-resistant motor was developed for ITER, consisting of high radiation-durable organic insulation materials, such as poly(benzimidazole), poly-liquid-crystal (VECRUS/spl reg/, VECTRA/spl reg/), and poly(phenyl ether)/urea grease. The motor was subjected to irradiation tests carried out by /sup 60/Co /spl gamma/-ray at room temperature, and its radiation resistance was confirmed to be more than 100 MGy, which is 50 times of that of an ordinary radiation durable motor. The key factor for attaining high radiation resistance was the application of aluminum (Al) thin leaves (thickness: 0.2 /spl mu/m) mainly having <100> faces. In a /sup 60/Co /spl gamma/-rays irradiation test conducted on VECRUS/spl reg/ paper containing Al leaves and overcoated by a silicon layer, an average absorption cross section for the Compton effect was found to decrease by 20% from the theoretical value calculated by the formula of Klein and Nishina. These results show that a secondary electron beam generated from a /spl gamma/-ray can easily pass through VECRUS/spl reg/ paper coated by a silicon layer including the dispersing Al leaf, by means of the channeling effect through the crystal lattice, thereby avoiding a close single collision and reducing serious damage.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
