Abstract
Residual stress instrument STRESS at 8 MW research reactor IR-8 at National Research Center “Kurchatov Institute” is described. Using double-crystal monochromator PG002(flat)/Si220(horizontal focusing perfect crystal), providing fixed neutron wavelength λ = 1.56 Å, resulted in compact arrangement of the instrument, high intensity and low background. The experiments showed that in maximal available path length (76 mm in ferritic steel) the difractometer is comparable with other modern stress-difractometers at more powerful reactors.
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