Simulation of one-dimensionally polarized x-ray semiconductor detectors

Klaus J. Engel; Christoph Herrmann

doi:10.1117/12.878110

16 March 2011 Simulation of one-dimensionally polarized x-ray semiconductor detectors

Klaus J. Engel, Christoph Herrmann

Proceedings Volume 7961, Medical Imaging 2011: Physics of Medical Imaging; 79610W (2011) https://doi.org/10.1117/12.878110
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States

Abstract

A pixelated X-ray semiconductor detector (="direct converter") is studied which contains an inhomogeneous electric field parallel to the depth axis caused by different concentrations of ionized dopants. X-ray energy depositions and charge movements within the detector are modeled in Monte-Carlo simulations giving access to a statistical analysis of electron drift times and current pulse widths for various degrees of static polarization. Charges induced on the pixel electrodes and pulse heights are evaluated and put to histograms of spectral detector responses and pulse height spectra, respectively, considering energy measurements before and after electronic pulse shaping. For n-doped semiconductors, the detector performance degrades due to pulse broadening. In contrast, a moderate p-doping can improve the detector performance in terms of shorter electron pulses, as long as the detector is not limited by dynamic polarization.

Citation Download Citation

Klaus J. Engel and Christoph Herrmann "Simulation of one-dimensionally polarized x-ray semiconductor detectors", Proc. SPIE 7961, Medical Imaging 2011: Physics of Medical Imaging, 79610W (16 March 2011); https://doi.org/10.1117/12.878110

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available