Full-field X-ray fluorescence imaging with a straight polycapillary X-ray collimator
(2020) In Journal of Instrumentation 15(12).- Abstract
Due to the availability of X-ray imaging detectors, full-field X-ray fluorescence (FF-XRF) imaging technique has become achievable, which provides an alternative to scanning X-ray fluorescence imaging with a micro-focus X-ray beamline. In this paper, we present a setup based on straight capillary optics and an energy-dispersive hybrid pixel detector, which can perform simultaneous mapping of several chemical elements. The photon transmission efficiency and spatial resolution are compared between two X-ray collimation setups: one using pinhole optics and one using straight polycapillary optics. There is a tradeoff between the spatial resolution and transmission efficiency when considering X-ray optics. When optimizing the spatial... (More)
Due to the availability of X-ray imaging detectors, full-field X-ray fluorescence (FF-XRF) imaging technique has become achievable, which provides an alternative to scanning X-ray fluorescence imaging with a micro-focus X-ray beamline. In this paper, we present a setup based on straight capillary optics and an energy-dispersive hybrid pixel detector, which can perform simultaneous mapping of several chemical elements. The photon transmission efficiency and spatial resolution are compared between two X-ray collimation setups: one using pinhole optics and one using straight polycapillary optics. There is a tradeoff between the spatial resolution and transmission efficiency when considering X-ray optics. When optimizing the spatial resolution, using straight capillary optics achieved a higher intensity gain when comparing with the pinhole setup. Characterization of the polycapillary imaging setup is performed through analyzing various samples in order to investigate the spatial frequency response and the energy sensitivity. This developed setup is capable of FF-XRF imaging in characteristic energies below 20 keV, while for higher energies the spatial resolution is affected by photon transmission through the collimator. This work shows the potential of the FF-XRF instrument in the monitoring of toxic metal distributions in environmental mapping measurements.
(Less)
- author
- An, S. LU ; Krapohl, D. ; Norlin, B. and Thungström, G.
- publishing date
- 2020-12
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Hybrid detectors, Inspection with x-rays, X-ray fluorescence (XRF) systems, X-ray transport and focusing
- in
- Journal of Instrumentation
- volume
- 15
- issue
- 12
- article number
- P12033
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85099099203
- ISSN
- 1748-0221
- DOI
- 10.1088/1748-0221/15/12/P12033
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2020 IOP Publishing Ltd and Sissa Medialab.
- id
- b795e027-6dad-4f42-a081-ebeddfb4e097
- date added to LUP
- 2023-01-26 17:10:08
- date last changed
- 2023-01-27 13:07:11
@article{b795e027-6dad-4f42-a081-ebeddfb4e097,
abstract = {{<p>Due to the availability of X-ray imaging detectors, full-field X-ray fluorescence (FF-XRF) imaging technique has become achievable, which provides an alternative to scanning X-ray fluorescence imaging with a micro-focus X-ray beamline. In this paper, we present a setup based on straight capillary optics and an energy-dispersive hybrid pixel detector, which can perform simultaneous mapping of several chemical elements. The photon transmission efficiency and spatial resolution are compared between two X-ray collimation setups: one using pinhole optics and one using straight polycapillary optics. There is a tradeoff between the spatial resolution and transmission efficiency when considering X-ray optics. When optimizing the spatial resolution, using straight capillary optics achieved a higher intensity gain when comparing with the pinhole setup. Characterization of the polycapillary imaging setup is performed through analyzing various samples in order to investigate the spatial frequency response and the energy sensitivity. This developed setup is capable of FF-XRF imaging in characteristic energies below 20 keV, while for higher energies the spatial resolution is affected by photon transmission through the collimator. This work shows the potential of the FF-XRF instrument in the monitoring of toxic metal distributions in environmental mapping measurements.</p>}},
author = {{An, S. and Krapohl, D. and Norlin, B. and Thungström, G.}},
issn = {{1748-0221}},
keywords = {{Hybrid detectors; Inspection with x-rays; X-ray fluorescence (XRF) systems; X-ray transport and focusing}},
language = {{eng}},
number = {{12}},
publisher = {{IOP Publishing}},
series = {{Journal of Instrumentation}},
title = {{Full-field X-ray fluorescence imaging with a straight polycapillary X-ray collimator}},
url = {{http://dx.doi.org/10.1088/1748-0221/15/12/P12033}},
doi = {{10.1088/1748-0221/15/12/P12033}},
volume = {{15}},
year = {{2020}},
}