Abstract
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.
Highlights
We demonstrate a three phase-grating moireneutron 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 moiretechnique allows for broad wavelength acceptance and relaxed requirements related to fabrication and alignment, circumventing the main obstacles associated with perfect crystal neutron interferometry
The main differences between the three phase-grating moire interferometer (PGMI) and the neutron Talbot-Lau grating interferometer [27,28] are that only phase gratings are used, a broader wavelength distribution is accepted, and the fringes are observed in the far field
Summary
Three Phase-Grating Moire Neutron Interferometer for Large Interferometer Area Applications We demonstrate a three phase-grating moireneutron interferometer in a highly intense neutron beam as a robust candidate for large area interferometry applications and for the characterization of materials.
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