Abstract
Neutron reflectometry is a very powerful and essential technique for structural studies on material interface with high depth resolution. Currently, a neutron reflectometer with horizontal sample geometry is being constructed on one of the neutron beam lines at a high-intensity pulsed-neutron source of Material and Life Science Facility, the Japan Proton Accelerator Research Complex (J-PARC), though it is not fully funded yet. The large gain in neutron flux at the J-PARC makes time-resolved reflectivity measurements of the order of minutes or even shorter, and also weak off-specular scattering measurements possible. The reflectometer will be equipped with state-of-the-art neutron optics, a position-sensitive detector with high counting rate and high spatial resolution, and a polarized neutron handling system. It will also have a grazingincidence small-angle scattering option to observe non-layered structures, and a neutron spin-echo option to directly probe interfacial dynamics in the order of neV. Much progress is expected in understanding the interfacial phenomena or interfacial functions by using the J-PARC neutron reflectometer.
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