Testing an Energy-Dispersive Counting-Mode Detector With Hard X-Rays From a Synchrotron Source

A counting-mode line detector has been evaluated at a synchrotron radiation source in order to assess its performance for imaging applications. The x-ray detector is based on 3 mm thick CdZnTe arrays with 1 mm pixel pitch and multi-threshold counting electronics. Data readout has been performed in threshold scan mode to provide maximum energy dispersion. The acquired energy spectra are interpreted regarding the characteristics of a periodic source and pulse pile-up in the detector. In particular, energy response and rate behavior of single-photon and double-photon events are investigated. Count rate dynamics are studied up to incident rates of . A further subject of the investigation is the variance of the observed counting rate. Linearity in the energy domain is tested between 40 keV and 140 keV.

[1]  G. Knoll.  Radiation detection and measurement , 1979 .

[2]  R. Horisberger,et al.  A pixel detector for the protein crystallography beamline at the SLS , 2002 .

[3]  S. Kishimoto.  BEHAVIOR OF A FAST COUNTING SYSTEM WITH AN AVALANCHE PHOTODIODE DETECTOR FOR SYNCHROTRON X-RAYS , 1997 .

[4]  T. Tumer,et al.  Multi-energy X-ray imaging with linear CZT pixel arrays and integrated electronics , 2004, IEEE Symposium Conference Record Nuclear Science 2004..

[5]  M. Bordessoule,et al.  High-rate counters versus integrating devices in synchrotron experiments , 2002 .

[6]  H. Graafsma,et al.  Characterization of a pixellated CdTe detector with single-photon processing readout , 2006 .

[8]  Alexander Volkovskii,et al.  High-resolution imaging 1D and 2D solid state detector systems , 2006, SPIE Optics + Photonics.

[9]  L. Blanquart,et al.  A pixel detector with large dynamic range for high photon counting rates , 2002 .

[10]  P. Delpierre,et al.  XPAD: A photons counting pixel detector for material sciences and small-animal imaging , 2007 .

[11]  G. Anton,et al.  The energy weighting technique: measurements and simulations , 2005 .

[12]  Bernd Schmitt,et al.  PILATUS: a two-dimensional X-ray detector for macromolecular crystallography , 2003 .

[13]  E. Heijne,et al.  X-ray imaging using single photon processing with semiconductor pixel detectors , 2003 .

[14]  J. Bateman.  The effect of beam time structure on counting detectors in SRS experiments. , 2000, Journal of synchrotron radiation.

[15]  Giovanni Mettivier,et al.  Evaluation of a photon-counting hybrid pixel detector array with a synchrotron X-ray source , 2002 .

[16]  Gisela Anton,et al.  Material reconstruction with spectroscopic pixel X-ray detectors , 2005 .

[17]  G. Materlik,et al.  Monolithic crystal monochromators for synchrotron radiation with order sorting and polarizing properties , 1980 .

[18]  S. Riederer,et al.  Selective iodine imaging using K-edge energies in computerized x-ray tomography. , 1977, Medical physics.

[19]  E. Roessl,et al.  K-edge imaging in x-ray computed tomography using multi-bin photon counting detectors , 2007, Physics in medicine and biology.

[20]  A. Macovski,et al.  Energy-selective reconstructions in X-ray computerised tomography , 1976, Physics in medicine and biology.

[21]  M Danielsson,et al.  Detective quantum efficiency dependence on x-ray energy weighting in mammography. , 1999, Medical physics.