Low Energy Characterization of Caliste HD, a Fine Pitch CdTe-Based Imaging Spectrometer

Dubos, S.; Limousin, O.; Blondel, C.; Chipaux, R.; Dolgorouky, Y.; Gevin, O.; Ménesguen, Y.; Meuris, A.; Orduna, Thierry; Tourette, Thierry; Sauvageon, A.

doi:10.1109/tns.2013.2281572

Cited by 14 publications

(7 citation statements)

References 19 publications

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“…The camera was connected to a FPGA board enabling a 14-bit ADC, used for slow-control and to extract signal For the entire matrix, we found an average gain value of 51.47 eV/ADU. It is approximately 4 times larger than that measured in [14] using the minimum dynamic range, as expected. The gain standard deviation is found to be only 0.39 eV/ADU.…”

Section: Methodssupporting

confidence: 82%

“…Due to the thickness of the detector, we observe a progressive decrease of the detection efficiency (below 50% after 143 keV), with the Compton effect becoming predominant. Major energy peaks are indicated and also listed in [14].…”

Section: Energy Response For Single Eventsmentioning

confidence: 99%

“…Moreover, a low-level detection threshold of 1.3 keV was recently reached with this device. This value gives the ability to perform imaging and spectrometry measurement of low energy photons starting from 2 keV, with a minimal detection efficiency as high as 40% [14].…”

Section: Baseline: Caliste Technologymentioning

confidence: 99%

“…Additional parts such as high-voltage filters, refrigerators, interface boards and data connections resulted in a large and heavy setup (example in Fig. 2 from [14]).…”

Section: First Demonstratormentioning

confidence: 99%

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ORIGAMIX, a CdTe-based spectro-imager development for nuclear applications

Dubos

Lemaire

Schanne

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tThe Astrophysics Division of CEA Saclay has a long history in the development of CdTe based pixelated detection planes for X and gamma-ray astronomy, with time-resolved imaging and spectrometric capabilities. The last generation, named Caliste HD, is an all-in-one modular instrument that fulfills requirements for space applications. Its full-custom front-end electronics is designed to work over a large energy range from 2 keV to 1 MeV with excellent spectroscopic performances, in particular between 10 and 100 keV (0.56 keV FWHM and 0.67 keV FWHM at 13.9 and 59.5 keV).In the frame of the ORIGAMIX project, a consortium based on research laboratories and industrials has been settled in order to develop a new generation of gamma camera. The aim is to develop a system based on the Caliste architecture for post-accidental interventions or homeland security, but integrating new properties (advanced spectrometry, hybrid working mode) and suitable for industry. A first prototype was designed and tested to acquire feedback for further developments.The main difference between astronomy and nuclear applications is the radiation flux and energyranges involved. In this study, we particularly focused on spectrometric performances with high energies and high fluxes. Therefore, our device was exposed to energies up to 700 keV ( 133 Ba, 137 Cs) and we measured the evolution of energy resolution (0.96 keV at 80 keV, 2.18 keV at 356 keV, 3.33 keV at 662 keV). Detection efficiency decreases after 150 keV, as Compton effect becomes dominant. However, CALISTE is also designed to handle multiple events, enabling Compton scattering reconstruction, which can drastically improve detection efficiencies and dynamic range for higher energies up to 1408 keV ( 22 Na, 60 Co, 152 Eu) within a 1-mm thick detector. In particular, such spectrometric performances obtained with 152 Eu and 60 Co were never measured before with this kind of detector.

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Section: Methodssupporting

confidence: 82%

Section: Energy Response For Single Eventsmentioning

confidence: 99%

Section: Baseline: Caliste Technologymentioning

confidence: 99%

“…Additional parts such as high-voltage filters, refrigerators, interface boards and data connections resulted in a large and heavy setup (example in Fig. 2 from [14]).…”

Section: First Demonstratormentioning

confidence: 99%

See 2 more Smart Citations

ORIGAMIX, a CdTe-based spectro-imager development for nuclear applications

Dubos

Lemaire

Schanne

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…Caliste is a hybrid CdTe detector module, initially developed for high-energy astronomy in space, declined in different versions depending on its applications. The version used for this study is Caliste-HD [11], [12].…”

Section: Caliste: a Miniature Cdte Spectro-imagermentioning

confidence: 99%

Compton imaging reconstruction methods: a comparative performance study of direct back-projection, SOE, a new Bayesian algorithm and a new Compton inversion method applied to real data with Caliste

et al. 2020

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Compton imaging is one of the main methods to localize radioactive hotspots, which emit high-energy gamma-ray photons, above 200 keV. Most of the Compton imaging systems are composed by at least two detection layers or one 3D position sensitive detector. In this study, we demonstrate the application of a new miniature pixelated single plane detector to Compton imaging. In this configuration, we do not have the information on interaction depth but we successfully test its ability to perform Compton localization by means of comparing different Compton reconstruction algorithms applied to real data measured with our single plane detection system.

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