High-dynamic-range x-ray imager employing CdZnTe detector arrays

Richard C. Schirato; Raulf M. Polichar; John H. Reed; Scott T. Smith

doi:10.1117/12.164753

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16 December 1993 High-dynamic-range x-ray imager employing CdZnTe detector arrays

Richard C. Schirato; Raulf M. Polichar; John H. Reed; Scott T. Smith

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Proceedings Volume 2009, X-Ray Detector Physics and Applications II; (1993) https://doi.org/10.1117/12.164753
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

We have designed and fabricated an x-ray linear scanner based on monolithic CdZnTe arrays. The arrays are 1.0 inch long with 16 detectors each. To increase the x-ray stopping power of the arrays, they are operated with the x-ray photons incident normal to the E-field direction. A photon-counting pulse mode read-out is utilized to produce high dynamic range images at low incident flux rates. Our read-out electronics are composed of independent 16-channel modules including charge pre-amplification, pulse shaping discriminated scaler, and buffered I/O. The linear packing density for the electronics is 16 channels per inch, commensurate with the array pitch. Results from measurements of spatial response generated by scanning a fine beam of gamma rays across the arrays, and x-ray images produced in a linear-scan mode are presented.

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Richard C. Schirato, Raulf M. Polichar, John H. Reed, and Scott T. Smith "High-dynamic-range x-ray imager employing CdZnTe detector arrays", Proc. SPIE 2009, X-Ray Detector Physics and Applications II, (16 December 1993); https://doi.org/10.1117/12.164753