Title :
Development of a portable gamma camera for environmental radiation monitoring
Author :
Shimazoe, Kenji ; Takahashi, Hiroki ; Kamada, K. ; Itoh, Shintaro ; Sato, Hikaru ; Usuki, Y.
fDate :
Oct. 27 2013-Nov. 2 2013
Abstract :
The continuous environmental radiation monitoring is very important after Fukushima accident especially for the evaluation of the decontamination. A portable gamma camera system is designed and fabricated with a compact digital front-end detector. A front-end detector consists of an 12 × 12 GAGG-APD (pixel size = 2 × 2 × 5 mm3) array combined with 144 channel Time over Threshold based ASIC. All the channel is digitized in this front-end detector without ADC. The whole system is composed of a front-end detector, a pin hole lead collimator and FPGA based DAQ system. The total power consumption is about 600 mW and its operating voltage is 3.3 V. The point source(137Cs) was measured and successfully reconstructed with different source positions.
Keywords :
application specific integrated circuits; avalanche photodiodes; collimators; data acquisition; field programmable gate arrays; gamma-ray apparatus; nuclear electronics; portable instruments; power consumption; radiation monitoring; semiconductor counters; solid scintillation detectors; 144-channel time over threshold based ASIC; 137Cs; FPGA based DAQ system; Fukushima accident; GAGG-APD array; compact digital front-end detector; continuous environmental radiation monitoring; decontamination; front-end detector; operating voltage; pin hole lead collimator; pixel size; point source; portable gamma camera system; source positions; total power consumption; Application specific integrated circuits; Arrays; Cameras; Data acquisition; Detectors; Field programmable gate arrays; Radiation monitoring;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2013 IEEE
Conference_Location :
Seoul
Print_ISBN :
978-1-4799-0533-1
DOI :
10.1109/NSSMIC.2013.6829632
