Manufacture of FFS Superconducting Quadrupole

The HED@FAIR channel of the FAIR accelerator complex in Darmstadt, Germany, should have a focusing system (FFS) whose main components are four superconducting (SC) quadrupole magnets providing a beam size of approximately 1 mm. These magnets should have a unique combination of the internal diameter of the SC winding 260 mm and the magnetic field gradient 37.5 T/m. The National Research Centre Kurchatov Institute–IHEP has developed the design of a quadrupole, the technology of manufacturing of SC winding and its collaring, the production of a magnetic core, and their assembly into a quadrupole cold mass. The results of the study of parts of the cold mass of the FFS quadrupole during their manufacture and after assembly are presented in this article.