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6 results on '"GAMPIX"'

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

Author

Lemaire, Hermine, Amgarou, Khalil, Khalil, Roger Abou, Angelique, Jean-Claude, Bonnet, Florent, De Toro, Daniel, Carrel, Frederick, Giarmana, Olivier, Gmar, Mehdi, Menaa, Nabil, Menesguen, Yves, Normand, Stephane, Patoz, Audrey, Schoepff, Vincent, Talent, Philippe, and Timi, Tebug

Abstract

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 is the lack of spectrometric information, preventing radioactive materials identification. 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 readout 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 proved the superiority of the ToT approach that will consequently be further explored. Energy calibration, tests of several pixel sizes and use of the Medipix3 readout chip are tracks to improve performances of the newly implemented imaging spectrometer. [ABSTRACT FROM PUBLISHER]

Published
2013
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2. GAMPIX: A new gamma imaging system for radiological safety and Homeland Security Purposes.

Author

Carrel, Frederick, Khalil, Roger Abou, Colas, Sébastien, de Toro, Daniel, Ferrand, Gilles, Gaillard-Lecanu, Emmanuelle, Gmar, Mehdi, Hameau, Daniel, Jahan, Sylvie, Laine, Frederic, Lalleman, Anne-Sophie, Lemasle, Francois, Mahe, Charly, Maurer, Jean-Eric, Menaa, Nabil, Normand, Stephane, Onillon, Herve, Saurel, Nicolas, Schoepff, Vincent, and Toubon, Herve

Abstract

Localization of radioactive sources is a major issue for many applications in the nuclear industry. Gamma imaging is a powerful non-destructive technique, enabling to locate radioactive hot spots contained in a given area and well-adapted to this topic. Industrial gamma cameras have been commercialized by various companies for several years but present some limitations in terms of sensitivity, weight and ease of use in comparison with the requirements of end-users. [ABSTRACT FROM PUBLISHER]

Published
2011
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3. Implementation of an imaging spectrometer for localization and identification of radioactive sources.

Author

Lemaire, H., Khalil, R. Abou, Amgarou, K., Angélique, J.-C., Bonnet, F., De Toro, D., Carrel, F., Giarmana, O., Gmar, M., Menaa, N., Menesguen, Y., Normand, S., Patoz, A., Schoepff, V., Talent, P., and Timi, T.

Subjects
*SPECTROMETERS, *RADIOACTIVE tracers, *SPECTROMETRY, *NUCLEAR industry, *PERFORMANCE evaluation
Abstract

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. [ABSTRACT FROM AUTHOR]

Published
2014
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4. Metrological characterization of the GAMPIX gamma camera

Author

T. Branger, D. Lacour, Frederick Carrel, Vincent Schoepff, V. Lourenco, Guillaume Amoyal, Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire National Henri Becquerel (LNHB), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département d'instrumentation Numérique (DIN (CEA-LIST)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)

Subjects
Ionizing radiation, Nuclear and High Energy Physics, gamma imaging, GAMPIX, Real-time computing, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, 7. Clean energy, Nuclear decommissioning, 030218 nuclear medicine & medical imaging, law.invention, spectrometry, 03 medical and health sciences, 0302 clinical medicine, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, law, Calibration, Coded aperture, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], nuclear instrumentation, Gamma camera, Physics, instrumentation, Electronic architecture, business.industry, 010401 analytical chemistry, radioactive source, Radioactive waste, gamma camera, gamma-rays, 0104 chemical sciences, Metrology, Radioactivity, Radiation protection, business, Energy (signal processing)
Abstract

International audience; Gamma imaging is a technique that allows the spatial localization of radioactive sources in decommissioning phases of nuclear facilities, nuclear waste management applications, radiation protection, and Homeland Security. One asset of this technique is the possibility to quickly localize radioactive sources associated with a quantitative information on their intensity. Using gamma camera diminishes the dose received by operators and consequently respects the ALARA principle (“As Low As Reasonably Achievable”).For several years, CEA LIST has been designing a coded aperture gamma camera, called GAMPIX. This imager was industrialized by MIRION Technologies (CANBERRA) under the commercial name of iPIX. An extensive study was initiated to validate the GAMPIX quantitative performances for evaluation of dose rate and associated uncertainties. The validation was performed with single and multiple radioactive sources covering an energy range from 60 keV to 1.3 MeV. This article presents experimental results obtained with the GAMPIX gamma camera in the framework of the EMRP ENV54 METRODECOM project.

Published
2019

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

Author

Olivier Giarmana, Audrey Patoz, Daniel De Toro, Stephane Normand, Yves Menesguen, Philippe Talent, N. Menaa, Jean-Claude Angelique, Hermine Lemaire, Mehdi Gmar, Tebug Timi, Roger Abou Khalil, Florent Bonnet, Frederick Carrel, K. Amgarou, Vincent Schoepff, Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Université Paris-Saclay-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), CANBERRA France, Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire National Henri Becquerel (LNHB), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département d'instrumentation Numérique (DIN (CEA-LIST))

Subjects
Time over Threshold, energy resolution, Imaging spectrometer, readout electronics, nuclear industry, homeland security applications, impact size, detection matrix, 01 natural sciences, 7. Clean energy, nuclear electronics, 030218 nuclear medicine & medical imaging, law.invention, Sensitivity, pixel size tests, 0302 clinical medicine, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, law, GAMPIX technology, energy sensitivity, Instrumentation, Gamma camera, CALIBRATION, Physics, preamplifiers, spectrometers, radioactive sources, Detector, imaging spectrometer development, PIXEL DETECTOR, Detectors, Dispersion, Cameras, Chip, GAMPIX gamma camera, TIME, pulse time spent, GAMMA-CAMERA, user-specified threshold, imaging spectrometer implementation, national security, Computer hardware, system design, Nuclear and High Energy Physics, Medipix3 readout chip, GAMPIX, spectrometric information limitation, Preamplifier, energy calibration, Gamma imaging, radioactive materials identification, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.PHYS.PHYS-COMP-PH]Physics [physics]/Physics [physics]/Computational Physics [physics.comp-ph], 03 medical and health sciences, Software portability, Timepix, Nuclear electronics, 0103 physical sciences, radioactive source localization, Calibration, ToT approach superiority, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, gamma-ray energy deposition, pixelated Timepix readout chip, Spectrometer, Pixel, 010308 nuclear & particles physics, business.industry, ToT mode, experimental tests, time over threshold mode, radioactive source identification, radioactive sources spatial localization, spectrometric methods, charge preamplifiers, RESOLUTION, newly implemented imaging spectrometer improve performances, CEA LIST, business, Energy (signal processing)
Abstract

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.

Published
2014

6. GAMPIX: A new generation of gamma camera.

Author

Carrel, Frederick, Gmar, Mehdi, Lemaire, Hermine, Schoepff, Vincent, and Thevenin, Mathieu

Abstract

The prototype of the GAMPIX gamma camera will be presented during the DASIP demo night. This system combines the Timepix pixellated chip, hybridized to a 1 mm CdTe substrate, a coded mask and a USB module dedicated to the interface between the gamma camera and a standard PC. [ABSTRACT FROM PUBLISHER]

Published
2012

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