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

Autor: Heacock B; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA., Arif M; National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Cory DG; Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada., Gnaeupel-Herold T; National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Haun R; Department of Physics, Tulane University, New Orleans, Louisiana 70118, USA., Huber MG; National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Jamer ME; National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA., Nsofini J; Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada., Pushin DA; Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada., Sarenac D; Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L3G1, Canada., Taminiau I; Quantum Valley Investments, Waterloo, Ontario N2L 0A9, Canada., Young AR; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
Jazyk: angličtina
Zdroj: The Review of scientific instruments [Rev Sci Instrum] 2018 Feb; Vol. 89 (2), pp. 023502.
DOI: 10.1063/1.5008273
Abstrakt: 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.
Databáze: MEDLINE
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