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Review of hybrid pixel detector readout ASICs for spectroscopic X-ray imaging

Ballabriga, R.; Alozy, J.; Campbell, M.; Frojdh, E.; Heijne, E.H.M.; Koenig, T.; Llopart, X.; Marchal, J.; Pennicard, D.; Poikela, T.; Tlustos, L.; Valerio, P.; Wong, W.; Zuber, M.

Abstract (englisch):
Semiconductor detector readout chips with pulse processing electronics have made possible spectroscopic X-ray imaging, bringing an improvement in the overall image quality and, in the case of medical imaging, a reduction in the X-ray dose delivered to the patient. In this contribution we review the state of the art in semiconductor-detector readout ASICs for spectroscopic X-ray imaging with emphasis on hybrid pixel detector technology. We discuss how some of the key challenges of the technology (such as dealing with high fluxes, maintaining spectral fidelity, power consumption density) are addressed by the various ASICs. In order to understand the fundamental limits of the technology, the physics of the interaction of radiation with the semiconductor detector and the process of signal induction in the input electrodes of the readout circuit are described. Simulations of the process of signal induction are presented that reveal the importance of making use of the small pixel effect to minimize the impact of the slow motion of holes and hole trapping in the induced signal in high-Z sensor materials. This can contribute to preserve fidelity in the measured spectrum with relatively short values of the shaper peaking time. ... mehr

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Volltext §
DOI: 10.5445/IR/1000057806
DOI: 10.1088/1748-0221/11/01/P01007
Zitationen: 78
Web of Science
Zitationen: 69
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Photonenforschung und Synchrotronstrahlung (IPS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1748-0221
KITopen-ID: 1000057806
HGF-Programm 56.03.20 (POF III, LK 01)
Nanoscience a.Material f.Inform.Technol.
Erschienen in Journal of Instrumentation
Band 11
Heft 1
Seiten P01007
Nachgewiesen in Scopus
Web of Science
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