Title :
A photon counting pixel chip with energy windowing
Author :
Fischer, P. ; Helmich, A. ; Lindner, M. ; Wermes, N. ; Blanquart, L.
Author_Institution :
Phys. Inst., Bonn Univ., Germany
Abstract :
A method allowing single photon counting with additional energy information without increasing the radiation dose is presented. On a pixel chip an energy window has been realised by introducing a second discriminator with a separate counter in every pixel. Both discriminators have an independent threshold voltage and can be adjusted individually. Measurements on the noise behavior, threshold variation and threshold settings are presented
Keywords :
discriminators; nuclear electronics; photon counting; semiconductor counters; discriminator; energy windowing; noise; photon counting; pixel chip; single photon counting; threshold settings; threshold variation; threshold voltage; Biological materials; Biomedical imaging; Bones; CMOS technology; Noise measurement; Radiation detectors; Semiconductor device measurement; Silicon radiation detectors; Threshold voltage; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.842523
