Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility
Abstract
The recent development of phase-grating moiré neutron interferometry promises a wide range of impactful experiments from dark-field imaging of material microstructure to precise measurements of fundamental constants. However, the contrast of 3% obtained using this moiré interferometer was well below the theoretical prediction of 30% using ideal gratings. It is suspected that non-ideal aspects of the phase-gratings was a leading contributor to this deficiency and that phase-gratings needed to be quantitatively assessed and optimized. Here we characterize neutron diffraction from phase-gratings using Bragg diffraction crystals to determine the optimal phase-grating orientations. We show well-defined diffraction peaks and explore perturbations to the diffraction peaks and the effects on interferometer contrast as a function of grating alignment. This technique promises to improve the contrast of the grating interferometers by providing in-situ aides to grating alignment.
- Authors:
-
- North Carolina State Univ., Raleigh, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
- Univ. of Waterloo, ON (Canada)
- Univ. of Waterloo, ON (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
- National Inst. of Health (NIH), Bethesda, MD (United States)
- Publication Date:
- Research Org.:
- North Carolina State University, Raleigh, NC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)
- OSTI Identifier:
- 1610387
- Alternate Identifier(s):
- OSTI ID: 1557880
- Grant/Contract Number:
- FG02-97ER41042; PHY-1307426
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 8; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Science & Technology - Other Topics; Materials Science; Physics
Citation Formats
Heacock, B., Sarenac, D., Cory, D. G., Huber, M. G., Hussey, D. S., Kapahi, C., Miao, H., Wen, H., and Pushin, D. A. Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility. United States: N. p., 2019.
Web. doi:10.1063/1.5099341.
Heacock, B., Sarenac, D., Cory, D. G., Huber, M. G., Hussey, D. S., Kapahi, C., Miao, H., Wen, H., & Pushin, D. A. Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility. United States. https://doi.org/10.1063/1.5099341
Heacock, B., Sarenac, D., Cory, D. G., Huber, M. G., Hussey, D. S., Kapahi, C., Miao, H., Wen, H., and Pushin, D. A. Mon .
"Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility". United States. https://doi.org/10.1063/1.5099341. https://www.osti.gov/servlets/purl/1610387.
@article{osti_1610387,
title = {Angular alignment and fidelity of neutron phase-gratings for improved interferometer fringe visibility},
author = {Heacock, B. and Sarenac, D. and Cory, D. G. and Huber, M. G. and Hussey, D. S. and Kapahi, C. and Miao, H. and Wen, H. and Pushin, D. A.},
abstractNote = {The recent development of phase-grating moiré neutron interferometry promises a wide range of impactful experiments from dark-field imaging of material microstructure to precise measurements of fundamental constants. However, the contrast of 3% obtained using this moiré interferometer was well below the theoretical prediction of 30% using ideal gratings. It is suspected that non-ideal aspects of the phase-gratings was a leading contributor to this deficiency and that phase-gratings needed to be quantitatively assessed and optimized. Here we characterize neutron diffraction from phase-gratings using Bragg diffraction crystals to determine the optimal phase-grating orientations. We show well-defined diffraction peaks and explore perturbations to the diffraction peaks and the effects on interferometer contrast as a function of grating alignment. This technique promises to improve the contrast of the grating interferometers by providing in-situ aides to grating alignment.},
doi = {10.1063/1.5099341},
journal = {AIP Advances},
number = 8,
volume = 9,
place = {United States},
year = {Mon Aug 19 00:00:00 EDT 2019},
month = {Mon Aug 19 00:00:00 EDT 2019}
}
Web of Science
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