The device has been developed to allow XAFS spectra of good quality to be o
btained using conventional powder diffractometer. The device is based on th
e mechanical system which synchronize the changes of curvature radius of be
nt crystal-monochromator with the Bragg angle. Due to high resolution(1-10
eV depending on the wavelength) and photon flux only several hours are need
ed to perform quality XAFS experiment. The device is easy to operate and ca
n be successfully used both for XAFS investigations and for student's pract
ice.