CHEN Yanzhou SUN Guangai CHEN Bo. Simulation on reducing pseudo shift by using oscillating radial collimators in neutron stress measurement[J]. Nuclear techniques, 2012, 35(2): 117-120.
CHEN Yanzhou SUN Guangai CHEN Bo. Simulation on reducing pseudo shift by using oscillating radial collimators in neutron stress measurement[J]. Nuclear techniques, 2012, 35(2): 117-120.DOI:
If stress-free sample is measured near surface by residual stress neutron diffractometer
shift of diffraction peak position(pseudo shift) will be introduced due to intrinsic properties of diffractometer.In order to improve accuracy of stress measurement
suitable methods to reduce the pseudo shift are necessary.In this paper
methods for reducing the pseudo shift are systematically investigated by ray-tracing program SIMRES.The results indicate that wavelength and peak clipping effects can be depressed by primary and secondary radial collimators
respectively.In this way the pseudo shift is effectively reduced.