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Title: The New Maia Detector System: Methods For High Definition Trace Element Imaging Of Natural Material

Abstract

Motivated by the need for megapixel high definition trace element imaging to capture intricate detail in natural material, together with faster acquisition and improved counting statistics in elemental imaging, a large energy-dispersive detector array called Maia has been developed by CSIRO and BNL for SXRF imaging on the XFM beamline at the Australian Synchrotron. A 96 detector prototype demonstrated the capacity of the system for real-time deconvolution of complex spectral data using an embedded implementation of the Dynamic Analysis method and acquiring highly detailed images up to 77 M pixels spanning large areas of complex mineral sample sections.

Authors:
 [1];  [2];  [2]; ;  [3]; ; ; ; ;  [1];  [1];  [2];  [4]; ; ;  [5];  [6]
  1. CSIRO, Bayview Avenue, Clayton VIC 3168 (Australia)
  2. (Australia)
  3. National Synchrotron Light Source, Brookhaven National Laboratory, NY (United States)
  4. Instrumentation Division, Brookhaven National Laboratory, Brookhaven NY (United States)
  5. Australian Synchrotron, Clayton VIC (Australia)
  6. Department of Physics, La Trobe University, VIC (Australia)
Publication Date:
OSTI Identifier:
21371776
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1221; Journal Issue: 1; Conference: 20. international congress on X-ray optics and microanalysis, Karlsruhe (Germany), 15-18 Sep 2009; Other Information: DOI: 10.1063/1.3399266; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; IMAGES; IMPLEMENTATION; MICROSCOPY; MINERALS; MULTI-ELEMENT ANALYSIS; QUANTITATIVE CHEMICAL ANALYSIS; SEMICONDUCTOR DETECTORS; TRACE AMOUNTS; X-RAY DETECTION; X-RAY FLUORESCENCE ANALYSIS; CHEMICAL ANALYSIS; DETECTION; MEASURING INSTRUMENTS; NONDESTRUCTIVE ANALYSIS; RADIATION DETECTION; RADIATION DETECTORS; X-RAY EMISSION ANALYSIS

Citation Formats

Ryan, C. G., School of Physics, University of Melbourne, Parkville VIC, CODES Centre of Excellence, University of Tasmania, Hobart TAS, Siddons, D. P., Kuczewski, A., Kirkham, R., Dunn, P. A., Hough, R. M., Lintern, M. J., Cleverley, J., Moorhead, G., School of Physics, University of Melbourne, Parkville VIC, De Geronimo, G., Paterson, D. J., Jonge, M. D. de, Howard, D. L., and Kappen, P.. The New Maia Detector System: Methods For High Definition Trace Element Imaging Of Natural Material. United States: N. p., 2010. Web. doi:10.1063/1.3399266.
Ryan, C. G., School of Physics, University of Melbourne, Parkville VIC, CODES Centre of Excellence, University of Tasmania, Hobart TAS, Siddons, D. P., Kuczewski, A., Kirkham, R., Dunn, P. A., Hough, R. M., Lintern, M. J., Cleverley, J., Moorhead, G., School of Physics, University of Melbourne, Parkville VIC, De Geronimo, G., Paterson, D. J., Jonge, M. D. de, Howard, D. L., & Kappen, P.. The New Maia Detector System: Methods For High Definition Trace Element Imaging Of Natural Material. United States. doi:10.1063/1.3399266.
Ryan, C. G., School of Physics, University of Melbourne, Parkville VIC, CODES Centre of Excellence, University of Tasmania, Hobart TAS, Siddons, D. P., Kuczewski, A., Kirkham, R., Dunn, P. A., Hough, R. M., Lintern, M. J., Cleverley, J., Moorhead, G., School of Physics, University of Melbourne, Parkville VIC, De Geronimo, G., Paterson, D. J., Jonge, M. D. de, Howard, D. L., and Kappen, P.. 2010. "The New Maia Detector System: Methods For High Definition Trace Element Imaging Of Natural Material". United States. doi:10.1063/1.3399266.
@article{osti_21371776,
title = {The New Maia Detector System: Methods For High Definition Trace Element Imaging Of Natural Material},
author = {Ryan, C. G. and School of Physics, University of Melbourne, Parkville VIC and CODES Centre of Excellence, University of Tasmania, Hobart TAS and Siddons, D. P. and Kuczewski, A. and Kirkham, R. and Dunn, P. A. and Hough, R. M. and Lintern, M. J. and Cleverley, J. and Moorhead, G. and School of Physics, University of Melbourne, Parkville VIC and De Geronimo, G. and Paterson, D. J. and Jonge, M. D. de and Howard, D. L. and Kappen, P.},
abstractNote = {Motivated by the need for megapixel high definition trace element imaging to capture intricate detail in natural material, together with faster acquisition and improved counting statistics in elemental imaging, a large energy-dispersive detector array called Maia has been developed by CSIRO and BNL for SXRF imaging on the XFM beamline at the Australian Synchrotron. A 96 detector prototype demonstrated the capacity of the system for real-time deconvolution of complex spectral data using an embedded implementation of the Dynamic Analysis method and acquiring highly detailed images up to 77 M pixels spanning large areas of complex mineral sample sections.},
doi = {10.1063/1.3399266},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1221,
place = {United States},
year = 2010,
month = 4
}
  • Motivated by the need for megapixel high definition trace element imaging to capture intricate detail in natural material, together with faster acquisition and improved counting statistics in elemental imaging, a large energy-dispersive detector array called Maia has been developed by CSIRO and BNL for SXRF imaging on the XFM beamline at the Australian Synchrotron. A 96 detector prototype demonstrated the capacity of the system for real-time deconvolution of complex spectral data using an embedded implementation of the Dynamic Analysis method and acquiring highly detailed images up to 77 M pixels spanning large areas of complex mineral sample sections.
  • The fundamental parameter method for quantitative SXRF and PIXE analysis and imaging using the dynamic analysis method is extended to model the changing X-ray yields and detector sensitivity with angle across large detector arrays. The method is implemented in the GeoPIXE software and applied to cope with the large solid-angle of the new Maia 384 detector array and its 96 detector prototype developed by CSIRO and BNL for SXRF imaging applications at the Australian and NSLS synchrotrons. Peak-to-background is controlled by mitigating charge-sharing between detectors through careful optimization of a patterned molybdenum absorber mask. A geological application demonstrates the capabilitymore » of the method to produce high definition elemental images up to {approx}100 M pixels in size.« less
  • Synchrotron X-ray fluorescence (SXRF) and X-ray absorption spectroscopy (XAS) have become standard tools to measure element concentration, distribution at micrometer- to nanometer-scale, and speciation (e.g., nature of host phase; oxidation state) in inhomogeneous geomaterials. The new Maia X-ray detector system provides a quantum leap for the method in terms of data acquisition rate. It is now possible to rapidly collect fully quantitative maps of the distribution of major and trace elements at micrometer spatial resolution over areas as large as 1 x 5 cm{sup 2}. Fast data acquisition rates also open the way to X-ray absorption near-edge structure (XANES) imaging,more » in which spectroscopic information is available at each pixel in the map. These capabilities are critical for studying inhomogeneous Earth materials. Using a 96-element prototype Maia detector, we imaged thin sections of an oxidized pisolitic regolith (2 x 4.5 mm{sup 2} at 2.5 x 2.5 {micro}m{sup 2} pixel size) and a metamorphosed, sedimentary exhalative Mn-Fe ore (3.3 x 4 mm{sup 2} at 1.25 x 5 {micro}m{sup 2}). In both cases, As K-edge XANES imaging reveals localized occurrence of reduced As in parts of these oxidized samples, which would have been difficult to recognize using traditional approaches.« less