A method of qualifying niobium and/or other super conducting materials for reliable fabrication of superconducting radio frequency (SCRF) cavities

摘要

A method of qualifying Niobium and/or other super conducting materials for the reliable fabrication of SCRF cavities, which will invariably deliver high accelerating fields comprising:
identification of the best superconducting lower critical field (H C1 ) based on subjecting a sample of the superconducting material selectively to mechanical stress, annealing at various temperatures, various chemical treatments, post-chemical treatment baking/annealing; and
identification of the best possible thermal conductivity of the material at said best superconducting lower critical field (H C1 ) to thereby qualify the superconducting material for the reliable fabrication of SCRF cavities adapted to deliver high accelerating fields.