Performance improvements of wavelength-shifting-fiber neutron detectors using high-resolution positioning algorithms
Abstract
On the basis of FluoroBancroft linear-algebraic method [S.B. Andersson, Opt. Exp. 16, 18714 (2008)] three highly-resolved positioning methods were proposed for wavelength-shifting fiber (WLSF) neutron detectors. Using a Gaussian or exponential-decay light-response function (LRF), the non-linear relation of photon-number profiles vs. x-pixels was linearized and neutron positions were determined. The proposed algorithms give an average 0.03-0.08 pixel position error, much smaller than that (0.29 pixel) from a traditional maximum photon algorithm (MPA). The new algorithms result in better detector uniformity, less position misassignment (ghosting), better spatial resolution, and an equivalent or better instrument resolution in powder diffraction than the MPA. Moreover, these characters will facilitate broader applications of WLSF detectors at time-of-flight neutron powder diffraction beamlines, including single-crystal diffraction and texture analysis.
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1286957
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 87; Journal Issue: 5; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Citation Formats
Wang, C. L. Performance improvements of wavelength-shifting-fiber neutron detectors using high-resolution positioning algorithms. United States: N. p., 2016.
Web. doi:10.1063/1.4949496.
Wang, C. L. Performance improvements of wavelength-shifting-fiber neutron detectors using high-resolution positioning algorithms. United States. https://doi.org/10.1063/1.4949496
Wang, C. L. Tue .
"Performance improvements of wavelength-shifting-fiber neutron detectors using high-resolution positioning algorithms". United States. https://doi.org/10.1063/1.4949496. https://www.osti.gov/servlets/purl/1286957.
@article{osti_1286957,
title = {Performance improvements of wavelength-shifting-fiber neutron detectors using high-resolution positioning algorithms},
author = {Wang, C. L.},
abstractNote = {On the basis of FluoroBancroft linear-algebraic method [S.B. Andersson, Opt. Exp. 16, 18714 (2008)] three highly-resolved positioning methods were proposed for wavelength-shifting fiber (WLSF) neutron detectors. Using a Gaussian or exponential-decay light-response function (LRF), the non-linear relation of photon-number profiles vs. x-pixels was linearized and neutron positions were determined. The proposed algorithms give an average 0.03-0.08 pixel position error, much smaller than that (0.29 pixel) from a traditional maximum photon algorithm (MPA). The new algorithms result in better detector uniformity, less position misassignment (ghosting), better spatial resolution, and an equivalent or better instrument resolution in powder diffraction than the MPA. Moreover, these characters will facilitate broader applications of WLSF detectors at time-of-flight neutron powder diffraction beamlines, including single-crystal diffraction and texture analysis.},
doi = {10.1063/1.4949496},
journal = {Review of Scientific Instruments},
number = 5,
volume = 87,
place = {United States},
year = {Tue May 17 00:00:00 EDT 2016},
month = {Tue May 17 00:00:00 EDT 2016}
}
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