Development of a Vector Magnet Based on High-Temperature Superconductors for Working with Polarized Neutrons

Polarized neutron reflectometry is an experimental method for studying metallic thin heterophase layered materials, polymer films, biological systems, free liquide surfaces, and magnetic fluids. It requires experimental equipment that includes a special magnetic system. The described magnetic system, a vector magnet, will allow one to change the direction of the magnetic field in three directions, to place a temperature-control device inside at low and ultra-low temperatures, and will have an aperture that allows one to place a system for detecting neutrons and gamma radiation outside. According to calculations, the cryomagnet will allow the application of a maximum field of up to 3 T in the vertical plane, and of up to 1 T in the horizontal plane. It is proposed to use a 4 mm wide high-temperature superconductor tape to manufacture the vector magnet. A cryostat with a vector magnet will be installed on the REMUR reflectometer on the eighth channel of the IBR-2 reactor.