Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer.

The Review of Scientific Instruments
B HeacockA R Young

Abstract

We find that annealing a previously chemically etched interferometer at 800 °C dramatically increased the interference fringe visibility from 23% to 90%. The Bragg plane misalignments were also measured before and after annealing using neutron rocking curves, showing that Bragg plane alignment was improved across the interferometer after annealing. This suggests that current interferometers with low fringe visibility may be salvageable and that annealing may become an important step in the fabrication process of future neutron interferometers, leading to less need for chemical etching and larger more exotic neutron interferometers.

References

Nov 1, 1985·Physical Review. B, Condensed Matter·J ArthurA Zeilinger
Sep 5, 2003·Nature·Yuji HasegawaHelmut Rauch
Jun 29, 2006·Physical Review Letters·F PfeifferC David
Sep 1, 2015·Acta Crystallographica. Section A, Foundations and Advances·T PotocarM Suda
Sep 25, 2015·Nature·Charles W ClarkDmitry A Pushin
Jan 1, 2005·Journal of Research of the National Institute of Standards and Technology·J S NicoA K Thompson
Nov 10, 2016·Optics Express·Dusan SarenacDmitry A Pushin

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Citations

Nov 7, 2019·Acta Crystallographica. Section A, Foundations and Advances·Benjamin HeacockAlbert R Young

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