GAMPIX: A new gamma imaging system for radiological safety and Homeland Security Purposes

Carrel, F.; Khalil, Roger Abou; Colas, Sébastien; Toro, D. De; Ferrand, Gilles; Gaillard-Lecanu, E.; Gmar, M.; Hameau, Daniel; Jahan, S.; Lainé, Frédéric; Lalleman, A. S.; Lemasle, Francois; Mahe, C.; Maurer, Jean-Eric; Menaa, N.; Normand, S.; Onillon, H.; Saurel, N.; Schoepff, Vincent; Toubon, H.

doi:10.1109/nssmic.2011.6154706

Cited by 35 publications

(27 citation statements)

References 11 publications

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“…Spatial localization of radioactive sources is currently a main issue interesting nuclear industry (nuclear power plants security, decommissioning of nuclear facilities, radiationprotection) as well as homeland security applications (controls, post-accidental interventions) [1] [2]. Gamma imaging is a very interesting technique to achieve this spatial localization by enabling superimposition of visible and gamma pictures using dedicated devices called gamma cameras.…”

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

“…In this context, CEA LIST designed a second generation system, named GAMPIX [1,18,19]. GAMPIX's body integrates three main building blocks: The detection system is a 1 mm thick CdTe substrate bump-bonded to a pixelated readout chip called Timepix [17] and developed by the CERN.…”

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

“…For this reason, 20 s are needed to detect a 137 Cs radioactive source with 2.5 µSv.h -1 dose rate and 60 s for a 60 Co source giving a dose rate of 3.8 µSv.h -1 . However, it is important to emphasize that, by adapting the characteristics of the coded mask, GAMPIX is able to cover an energy range from 241 Am to 60 Co with better performances than CARTOGAM even at high energy (see [1] for results obtained in Nuclear Power Plants). The second point is the portability facilitated by the reduction of the weight.…”

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

“…Finally, for post-accidental interventions, GAMPIX can help the first responders to quickly identify dangerous areas in Fukushima type environments. Experimental results illustrating these applications can be found in the Reference [1].…”

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

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Implementation of an imaging spectrometer for localization and identification of radioactive sources

Lemaire

Khalil

Amgarou

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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Spatial localization of radioactive sources is currently a main issue interesting nuclear industry as well as homeland security applications and can be achieved using gamma cameras. For several years, CEA LIST has been designing a new system, called GAMPIX, with improved sensitivity, portability and ease of use. The main remaining limitation of this system is the lack of spectrometric information, preventing the identification of radioactive materials. This article describes the development of an imaging spectrometer based on the GAMPIX technology. Experimental tests have been carried out according to both spectrometric methods enabled by the pixelated Timepix chip used in the GAMPIX gamma camera. The first method is based on the size of the impacts produced by a gamma-ray energy deposition in the detection matrix. The second one uses the Time over Threshold (ToT) mode of the Timepix chip and deals with time spent by pulses generated by charge preamplifiers over a user-specified threshold. Both energy resolution and sensitivity studies demonstrated the superiority of the ToT approach which will consequently be further explored. Energy calibration, tests of different pixel sizes for the Timepix chip and use of the Medipix3 chip are future milestones to improve performances of the newly implemented imaging spectrometer

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Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

Section: Implementation Of An Imaging Spectrometer For Localization Amentioning

confidence: 99%

See 2 more Smart Citations

Implementation of an imaging spectrometer for localization and identification of radioactive sources

Lemaire

Khalil

Amgarou

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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“…The gamma cameras can be classified into three types: a pinhole type [2][3][4] and a coded aperture type [5][6][7][8][9], each of which has a collimator, and a Compton type camera [10][11][12][13][14] which does not need the collimator. Each type has different characteristics due to the different imaging principles.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic gamma camera for use in high dose environments

Ueno

Takahashi

Ishitsu

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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We developed a pinhole gamma camera to measure distributions of radioactive material contaminants and to identify radionuclides in extraordinarily high dose regions (1,000 mSv/h). The developed gamma camera is characterized by: (1) tolerance for high dose rate environments; (2) high spatial and spectral resolution for identifying unknown contaminating sources; and (3) good usability for being carried on a robot and remotely controlled. These are achieved by using a compact pixelated detector module with CdTe semiconductors, efficient shielding, and a fine resolution pinhole collimator. The gamma camera weighs less than 100 kg, and its field of view is an 8 m square in the case of a distance of 10 m and its image is divided into 256 (16 x 16) pixels. From the laboratory test, we found the energy resolution at the 662 keV photopeak was 2.3% FWHM, which is enough to identify the radionuclides. We found that the count rate per background dose rate was 220 cps h/mSv and the maximum count rate was 300 kcps, so the maximum dose rate of the environment where the gamma camera can be operated was calculated as 1,400 mSv/h. We investigated the reactor building of Unit 1 at the Fukushima Dai-ichi Nuclear Power Plant using the gamma camera and could identify the unknown contaminating source in the dose rate environment that was as high as 659 mSv/h.

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Radioactive Source Localization Method for the Partially Coded Field-of-View of Coded-Aperture Imaging in Nuclear Security Applications

Liu

Cheng

Tuo

et al. 2022

Advanced X-Ray Radiation Detection:

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GAMPIX: A new gamma imaging system for radiological safety and Homeland Security Purposes

Cited by 35 publications

References 11 publications

Implementation of an imaging spectrometer for localization and identification of radioactive sources

Implementation of an imaging spectrometer for localization and identification of radioactive sources

Spectroscopic gamma camera for use in high dose environments

Radioactive Source Localization Method for the Partially Coded Field-of-View of Coded-Aperture Imaging in Nuclear Security Applications

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