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, the free surfaces of liquids, and magnetic fluids. It requires experimental equipment that includes a special magnetic system. The magnetic system described in this work, 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 rays outside. According to calculations, the cryomagnet will allow the application of a maximum field in the vertical plane of up to 3 T, and in the horizontal plane of up to 1 T. To manufacture a vector magnet, in this work, it is proposed to use a tape made of a high-temperature superconductor with a width of 4 mm. A cryostat with a vector magnet will be installed at the REMUR reflectometer on the eighth channel of the IBR-2 reactor.