JET divertor coils, manufacture, assembly and testing

Four coils have been built and installed in the JET vacuum vessel to produce divertor plasmas. The coils are copper with glass epoxy insulation and are enclosed in vacuum tight Inconel cases. At the coil contractor's factory, the coil parts were manufactured and process techniques qualified. In the JET vacuum vessel the conductors bars were brazed to form the coils, which were inserted in the casings and impregnated and cured with epoxy resin.<>