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Three Phase-Grating Moiré Neutron Interferometer for Large Interferometer Area Applications

D Sarenac^1,2, D A Pushin^1,2, M G Huber³

¹Department of Physics, University of Waterloo, Waterloo, Ontario, Canada N2L3G1.

Physical Review Letters

|March 31, 2018

Abstract

None:

We demonstrate a three phase-grating moiré neutron interferometer in a highly intense neutron beam as a robust candidate for large area interferometry applications and for the characterization of materials. This novel far-field moiré technique allows for broad wavelength acceptance and relaxed requirements related to fabrication and alignment, thus circumventing the main obstacles associated with perfect crystal neutron interferometry. We observed interference fringes with an interferometer length of 4 m and examined the effects of an aluminum 6061 alloy sample on the coherence of the system. Experiments to measure the autocorrelation length of samples and the universal gravitational constant are proposed and discussed.

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