Title :
Monolithic array of semi-insulating GaAs detectors: technology, performance and application in digital X-ray scanner
Author :
F. Dubecky;P. Scepko;B. Zat´ko;V. Sekerka;V. Necas;M. Sekacova;M. Hudec;A. Perd´ochova;P. Bohacek
Author_Institution :
Inst. of Electr. Eng., Slovak Acad. of Sci., Bratislava, Slovakia
fDate :
6/27/1905 12:00:00 AM
Abstract :
In the present work developed X-ray digital portable scanner operating in "quantum" imaging mode with improved dynamic range in contrast of the observed X-ray images is demonstrated. Detection unit is based on semi-insulating GaAs strip line detectors with pitch 0.25 mm and absorption length of strip 1.25 mm with detection efficiency over 60 %for detection of 60 keV photons at a bias of 200 V. Readout electronics consists of 480 channels dc coupled with detectors. Scanned area has dimensions 12/spl times/15 cm/sup 2/. Collected data are used for creation of X-ray "quantum´´ images of selected test objects using the developed imaging software.
Keywords :
"Sensor arrays","Gallium arsenide","X-ray detection","X-ray detectors","X-ray imaging","Optical imaging","Dynamic range","Electromagnetic wave absorption","Strips","Readout electronics"
Conference_Titel :
Semiconducting and Insulating Materials, 2004. SIMC-XIII-2004. 13th International Conference on
Print_ISBN :
0-7803-8668-X
DOI :
10.1109/SIM.2005.1511431
