Inorganic and Hybrid Insulation Materials for ITER
Insulation systems are a critical component in superconducting fusion magnet systems, such as the International Thermonuclear Experimental Reactor (ITER). Past cryogenic magnet systems have often relied on organic composite (e.g., glass/epoxy) materials for insulation. Concerns regarding reliability, radiation resistance, and electrical properties of organic systems have prompted the search for alternate materials, particularly hybrids which incorporate an inorganic barrier. Fabricability, mechanical, and electrical performance of various inorganic and hybrid materials are investigated. Materials include mica based sheets, plasma-sprayed and porcelain-enamel ceramic coatings, polyimide films and coatings, reinforced cement, and polymer conversion ceramic prepregs. Radiation resistance of selected candidate material systems will be evaluated in subsequent investigations.
KeywordsShear Strength Ceramic Coating Glass Fabric Polyimide Film International Thermonuclear Experimental Reactor
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