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Simulation study of a highly efficient, high resolution X-ray sensor based on self-organizing aluminum oxide

: Muehlbauer, J.; Sukowski, F.; Reims, N.; Krueger, P.; Schreiber, J.; Mukhurov, I.; Uhlmann, N.

Volltext ()

Journal of Instrumentation 7 (2012), Nr.1, Art. C01095, 9 S.
ISSN: 1748-0221
International Workshop on Radiation Imaging Detectors (IWORID) <13, 2011, Zurich>
Zeitschriftenaufsatz, Konferenzbeitrag, Elektronische Publikation
Fraunhofer IIS ()
Fraunhofer IZFP, Institutsteil Dresden ( Fraunhofer IZFP-D) ()

State of the art X-ray imaging sensors comprise a trade-off between the achievable efficiency and the spatial resolution. To overcome such limitations, the use of structured and scintillator filled aluminum oxide (AlOx) matrices has been investigated. We used Monte-Carlo (MC) X-ray simulations to determine the X-ray imaging quality of these AlOx matrices. Important factors which influence the behavior of the matrices are: filling factor (surface ratio between channels and 'closed' AlOx), channel diameter, aspect ratio, filling material etc. Therefore we modeled the porous AlOx matrix in several different ways with the MC X-ray simulation tool ROSI [1] and evaluated its properties to investigate the achievable performance at different X-ray spectra, with different filling materials (i.e. scintillators) and varying channel height and pixel readout. In this paper we focus on the quantum efficiency, the spatial resolution and image homogeneity.