First neutron Bragg-edge imaging experimental results at CSNS* *Project supported by the National Key Research and Development Program of China (Grant Nos. 2017YFB0701903 and 2016YFA0401502), the National Natural Science Foundation of China (Grant No. 12041202), the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2017023), the Guangdong Natural Science Foundation, China (Grant No. 2016A030313129), and the Department

Abstract

The neutron Bragg-edge imaging is expected to be a new non-destructive energy-resolved neutron imaging technique for quantitatively two-dimensional or three-dimensional visualizing crystallographic information in a bulk material, which could be benefited from pulsed neutron source. Here we build a Bragg-edge imaging system on the General Purpose Powder Diffractometer at the China Spallation Neutron Source. The residual strain mapping of a bent Q235 ferrite steel sample has been achieved with a spectral resolution of 0.15% by the time-of-flight neutron Bragg-edge imaging on this system. The results show its great potential applications in materials science and engineering.