The convergent-beam method for time-of-flight neutron crystallography using capillary optics can give expected integrated intensity gains of ∼100 for a Bragg peak for samples as small as the focal spot (∼100 µm). The diffracted beam intensities have expected gains greater than 500 for powder samples of similar dimensions.

A polycapillary focusing optic has been tested both on a monochromatic and a polychromatic beam of neutrons. An intensity gain of as much as 5.8 ± 0.9 was observed.