Development of high precision joints in particle accelerator components performed by vacuum brazing

This paper resumes the study of the development of high precision joints performed by vacuum brazing as part of the fabrication of accelerating structures and other parts of particle accelerators. The study is focused on the selection of the most suitable parameters for carrying out high quality copper/copper and copper/stainless steel joints such as thermal cycle, filler material, filler grooves design, surface preparation, thickness of Ni plating and joint clearance. The joint characterization was carried out by means of microstructural (OM, SEM) and compositional (EDS) techniques and by leaking test.