DEVELOPMENT OF RADIATION-RESISTANT MAGNET COILS FOR HIGH-INTENSITY BEAM LINES .2. COMPLETELY INORGANIC INSULATED COILS

We report here on R/D work concerning two types of radiation-resistant magnet coils, which were insulated using completely inorganic materia ls. Regarding the first coil, the electric insulator employed was a al umina long fiber and a ceramic binder. A new combination of adhesive a gent, inorganic filler and alumina long fiber was found, which enabled us to form a strong insulation layer which does not peel off from a c opper conductor. The magnet coil for 2000A excitation current was prod uced using this insulation method. The second coil is a mineral insula ted cable (MIC) with a 3000A excitation current. This 3000A-class MIC has been manufactured as a short sample, and was tested concerning its electric insulation both before and after bending.