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Proceedings Paper

Experimental comparison of next-generation XDi topologies
Author(s): G. Harding; D. Kosciesza; S. Olesinski; H. Strecker
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Paper Abstract

SALOME (an acronym for Small Angle Lab Operation Measuring Equipment) is a versatile, energy-dispersive x-ray diffraction imaging (XDi) test-bed facility; commissioned, funded and supported by the Transportation Security Laboratory, Atlantic City, USA. In work presented here, SALOME has been used to investigate the photon collection efficiency of three beam topologies that have been proposed for Next-Generation XDi, namely: Direct Fan-beam (DFB); Parallel Beam (PB); and Inverse Fan-beam (IFB). The single channel replication unit for each of the three topologies was implemented on SALOME. The apertures defining each topology were varied in width, influencing both the detector scatter signal and the momentum resolution. A small powder graphite sample was used as reference object for these measurements, as it provided simultaneous data on counting rate as well as peak resolution for the selected Bragg peak. The photon collection efficiencies at constant momentum peak width for the DFB, PB and IFB topologies were found to follow the trend (from lowest to highest, respectively) conjectured elsewhere in the scientific literature.

Paper Details

Date Published: 2 September 2010
PDF: 9 pages
Proc. SPIE 7806, Penetrating Radiation Systems and Applications XI, 78060I (2 September 2010); doi: 10.1117/12.864143
Show Author Affiliations
G. Harding, Morpho Detection GmbH (Germany)
D. Kosciesza, Morpho Detection GmbH (Germany)
S. Olesinski, Morpho Detection GmbH (Germany)
H. Strecker, Morpho Detection GmbH (Germany)

Published in SPIE Proceedings Vol. 7806:
Penetrating Radiation Systems and Applications XI
F. Patrick Doty; H. Bradford Barber; Hans Roehrig; Richard C. Schirato, Editor(s)

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