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Toward real-time charged-particle image reconstruction using polar onion-peeling.

Roberts, G. M. and Nixon, J. L. and Lecointre, J. and Wrede, E. and Verlet, J. R. R. (2009) 'Toward real-time charged-particle image reconstruction using polar onion-peeling.', Review of scientific instruments., 80 (5). 053104.

Abstract

A method to reconstruct full three-dimensional photofragment distributions from their two-dimensional (2D) projection onto a detection plane is presented, for processes in which the expanding Newton sphere has cylindrical symmetry around an axis parallel to the projection plane. The method is based on: (1) onion-peeling in polar coordinates [ Zhao et al., Rev. Sci. Instrum. 73, 3044 (2002) ] in which the contribution to the 2D projection from events outside the plane bisecting the Newton sphere are subtracted in polar coordinates at incrementally decreasing radii; and (2) ideas borrowed from the basis set expansion (pBASEX) method in polar coordinates [ Garcia et al., Rev. Sci. Instrum. 75, 4989 (2004) ], which we use to generate 2D projections at each incremental radius for the subtraction. Our method is as good as the pBASEX method in terms of accuracy, is devoid of centerline noise common to reconstruction methods employing Cartesian coordinates; and it is computationally cheap allowing images to be reconstructed as they are being acquired in a typical imaging experiment.

Item Type:Article
Keywords:Image reconstruction, Molecule-photon collisions, Particle detectors.
Full text:PDF - Published Version (486Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1063/1.3126527
Publisher statement:Copyright (2009) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Roberts, G. M. and Nixon, J. L. and Lecointre, J. and Wrede, E. and Verlet, J. R. R. (2009) 'Toward real-time charged-particle image reconstruction using polar onion-peeling.', Review of scientific instruments., 80 (5). 053104 and may be found at http://dx.doi.org/10.1063/1.3126527
Record Created:26 Oct 2012 10:20
Last Modified:22 Apr 2014 10:10

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