“…In standard neutron experiments, typical beam sizes are within the 0.1-10 mm range. To push down the available spatial resolution, to date specific optics have been developed using several approaches (Erko, 2008), e.g., Bragg diffraction (Mikula et al, 1986), reflection [in mirrors (Sears, 1989, Kumakhov lenses (Kumakhov and Sharov, 1992), or capillary optics (Chen et al, 1992)] and refraction, in compound refractive lens (Eskildsen et al, 1998;Beguiristain et al, 2002;Shimizu, 2006).…”