Sarenac D, Pushin D A, Huber M G, Hussey D S, Miao H, Arif M, Cory D G, Cronin A D, Heacock B, Jacobson D L, LaManna J M, Wen H
Department of Physics, University of Waterloo, Waterloo, Ontario, Canada N2L3G1.
Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, Canada N2L3G1.
Phys Rev Lett. 2018 Mar 16;120(11):113201. doi: 10.1103/PhysRevLett.120.113201.
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.
我们展示了一种在高强度中子束中的三相光栅莫尔中子干涉仪，它是大面积干涉测量应用和材料表征的有力候选者。这种新颖的远场莫尔技术允许宽波长接受范围，并放宽了与制造和对准相关的要求，从而规避了与完美晶体中子干涉测量相关的主要障碍。我们用长度为4米的干涉仪观察到了干涉条纹，并研究了6061铝合金样品对系统相干性的影响。还提出并讨论了测量样品自相关长度和万有引力常数的实验。
