A Neutron Dark-field Imaging Experiment with a Neutron Grating Interferometer at a Thermal Neutron Beam Line at HANARO

A neutron grating interferometer has been developed and implemented for phase-contrast and dark-field imaging experiments on a thermal neutron beamline at the Ex-core Neutron irradiation Facility (ENF) at High-flux Advanced Neutron Application Reactor (HANARO), a 30 MW multipurpose research reactor. The gratings were designed and fabricated to function optimally at a neutron wavelength of 4.4 Å while Beryllium filters were used to shape the beam spectrum by cutting off wavelengths below 4 Å. The average visibility over the grating area was measured at 10%. Neutron dark-field imaging experiments were performed to visualize magnetic domains in a Fe-3% Si sheet in a variety of orientations. KCI Citation Count: 18