Development of a portable gamma camera for environmental radiation monitoring

Author

Shimazoe, Kenji ; Takahashi, Hiroki ; Kamada, K. ; Itoh, Shintaro ; Sato, Hikaru ; Usuki, Y.

fYear

2013

fDate

Oct. 27 2013-Nov. 2 2013

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2013 IEEE

Conference_Location

Seoul

Print_ISBN

978-1-4799-0533-1

Type

conf

DOI

10.1109/NSSMIC.2013.6829632

Filename

6829632