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

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. Furthermore, 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.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [5];  [5];  [5];  [6];  [1]
  1. North Carolina State Univ., Raleigh, NC (United States); Triangle Univ. Nuclear Lab, Durham, NC (United States)
  2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  3. Univ. of Waterloo, Waterloo, ON (Canada); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
  4. Tulane Univ., New Orleans, LA (United States)
  5. Univ. of Waterloo, Waterloo, ON (Canada)
  6. Quantum Valley Investments, Waterloo, ON (Canada)
Publication Date:
Research Org.:
North Carolina State Univ., Raleigh, NC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1526027
Alternate Identifier(s):
OSTI ID: 1419910
Grant/Contract Number:  
FG02-97ER41042
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 2; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Heacock, B., Arif, M., Cory, D. G., Gnaeupel-Herold, T., Haun, R., Huber, M. G., Jamer, M. E., Nsofini, J., Pushin, D. A., Sarenac, D., Taminiau, I., and Young, A. R.. Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer. United States: N. p., 2018. Web. https://doi.org/10.1063/1.5008273.
Heacock, B., Arif, M., Cory, D. G., Gnaeupel-Herold, T., Haun, R., Huber, M. G., Jamer, M. E., Nsofini, J., Pushin, D. A., Sarenac, D., Taminiau, I., & Young, A. R.. Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer. United States. https://doi.org/10.1063/1.5008273
Heacock, B., Arif, M., Cory, D. G., Gnaeupel-Herold, T., Haun, R., Huber, M. G., Jamer, M. E., Nsofini, J., Pushin, D. A., Sarenac, D., Taminiau, I., and Young, A. R.. Thu . "Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer". United States. https://doi.org/10.1063/1.5008273. https://www.osti.gov/servlets/purl/1526027.
@article{osti_1526027,
title = {Increased interference fringe visibility from the post-fabrication heat treatment of a perfect crystal silicon neutron interferometer},
author = {Heacock, B. and Arif, M. and Cory, D. G. and Gnaeupel-Herold, T. and Haun, R. and Huber, M. G. and Jamer, M. E. and Nsofini, J. and Pushin, D. A. and Sarenac, D. and Taminiau, I. and Young, A. R.},
abstractNote = {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. Furthermore, 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.},
doi = {10.1063/1.5008273},
journal = {Review of Scientific Instruments},
number = 2,
volume = 89,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: The neutron interferometer annealed in this experiment. The base is roughly 10 cm × 10 cm. The blades are 3 cm tall.

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