High-resolution neutron Fourier diffractometer with wide-aperture detector Sergey V. Sumnikov, Bekarys Yerzhanov, Roman N. Vasin, Dmitry A. Balagurov, Vasil M. Milkov, et al. Journal of Applied Crystallography, 2026 The high-resolution neutron Fourier diffractometer (HRFD), implementing the correlation method of diffraction data acquisition, has been successfully operated at the IBR-2 pulsed reactor in the Frank Laboratory of Neutron Physics of the Joint Institute for Nuclear Research for more than 30 years. This paper summarizes the results of upgrading the main units of the HRFD (the Fourier chopper, neutron guide and data acquisition electronics have been replaced with new, modern counterparts) and presents the first results of commissioning a new wide-aperture scintillation detector with a total sensitive-elements area of about 13 m 2 and a total solid angle of about 2.0 sr. The newly emerged opportunities for studying the atomic and magnetic structures of crystalline materials and their evolution in real time are discussed.
