Approximating the near-edge mass absorption coefficients for Ni using an ultra-thin bimetal foil
Abstract
In an effort to improve the characteristics of a fluorescing metal-foil-based beam position monitor, a new bimetal ultra-thin (0.98/0.67 µm) Ti–Ni foil was introduced to replace an existing single-element ultra-thin 0.5 µm thick Cr foil. During characterization it was determined that absorption measurements on the bimetal foil could be used to fit the Ni mass absorption coefficients accurately in the vicinity of the NiKedge. Comparison with experimental results from the literature demonstrated that the fitting procedure produced coefficients with uncertainties of the order of ±1%. Once determined, these fit coefficients allowed the thickness of an independently mounted 8 µm thick Ni foil to be computed from absorption measurements instead of relying on a tool-based measurement of the foil thickness. Using the 8 µm thick foil, a continuous map of Ni mass absorption coefficients was produced at 1 eV resolution throughout the near-edge region. Lastly, this high-resolution map marks a significant improvement over the existing NIST XCOM or FFAST database mass absorption coefficients, which have estimated errors of 10–20% for the near-edge region.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1339625
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Applied Crystallography (Online)
- Additional Journal Information:
- Journal Volume: 50; Journal Issue: 1; Journal ID: ISSN 1600-5767
- Publisher:
- International Union of Crystallography
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; mass absorption coefficients; nickel; titanium; absorption; ultra-thin foils; Ni K edge
Citation Formats
Alkire, Randall W. Approximating the near-edge mass absorption coefficients for Ni using an ultra-thin bimetal foil. United States: N. p., 2016.
Web. doi:10.1107/S1600576716017544.
Alkire, Randall W. Approximating the near-edge mass absorption coefficients for Ni using an ultra-thin bimetal foil. United States. https://doi.org/10.1107/S1600576716017544
Alkire, Randall W. 2016.
"Approximating the near-edge mass absorption coefficients for Ni using an ultra-thin bimetal foil". United States. https://doi.org/10.1107/S1600576716017544. https://www.osti.gov/servlets/purl/1339625.
@article{osti_1339625,
title = {Approximating the near-edge mass absorption coefficients for Ni using an ultra-thin bimetal foil},
author = {Alkire, Randall W.},
abstractNote = {In an effort to improve the characteristics of a fluorescing metal-foil-based beam position monitor, a new bimetal ultra-thin (0.98/0.67 µm) Ti–Ni foil was introduced to replace an existing single-element ultra-thin 0.5 µm thick Cr foil. During characterization it was determined that absorption measurements on the bimetal foil could be used to fit the Ni mass absorption coefficients accurately in the vicinity of the NiKedge. Comparison with experimental results from the literature demonstrated that the fitting procedure produced coefficients with uncertainties of the order of ±1%. Once determined, these fit coefficients allowed the thickness of an independently mounted 8 µm thick Ni foil to be computed from absorption measurements instead of relying on a tool-based measurement of the foil thickness. Using the 8 µm thick foil, a continuous map of Ni mass absorption coefficients was produced at 1 eV resolution throughout the near-edge region. Lastly, this high-resolution map marks a significant improvement over the existing NIST XCOM or FFAST database mass absorption coefficients, which have estimated errors of 10–20% for the near-edge region.},
doi = {10.1107/S1600576716017544},
url = {https://www.osti.gov/biblio/1339625},
journal = {Journal of Applied Crystallography (Online)},
issn = {1600-5767},
number = 1,
volume = 50,
place = {United States},
year = {Tue Nov 01 00:00:00 EDT 2016},
month = {Tue Nov 01 00:00:00 EDT 2016}
}
Web of Science
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