Ruggedization of CdZnTe detectors and detector assemblies for radiation detection applications

Lu, P. H.; Gomolchuk, P.; Chen, H.; Beitz, D.; Grosser, Adam

doi:10.1016/j.nima.2015.01.022

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Our front-end electronics are designed to work with this type of detector assembly, and the readout boards are plugged into the side faces of the detector assembly (see figure 22) so a stacked system with arbitrary depth, as required for the evaluation of the Compton camera, can be easily constructed. Further investigations on ruggedization of CZT detectors and detector assemblies have been presented in [19].…”

Section: Basic Design Considerations 21 Czt Detector Assemblymentioning

confidence: 99%

Charge-sensitive front-end electronics with operational amplifiers for CdZnTe detectors

et al. 2016

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Cadmium zinc telluride (CdZnTe, CZT) radiation detectors are suitable for a variety of applications, due to their high spatial resolution and spectroscopic energy performance at room temperature. However, state-of-the-art detector systems require high-performance readout electronics. Though an application-specific integrated circuit (ASIC) is an adequate solution for the readout, requirements of high dynamic range and high throughput are not available in any commercial circuit. Consequently, the present study develops the analog front-end electronics with operational amplifiers for an 8 × 8 pixelated CZT detector. For this purpose, we modeled an electrical equivalent circuit of the CZT detector with the associated charge-sensitive amplifier (CSA). Based on a detailed network analysis, the circuit design is completed by numerical values for various features such as ballistic deficit, charge-to-voltage gain, rise time, and noise level. A verification of the performance is carried out by synthetic detector signals and a pixel detector. The experimental results with the pixel detector assembly and a 22 Na radioactive source emphasize the depth dependence of the measured energy. After pulse processing with depth correction based on the fit of the weighting potential, the energy resolution is 2.2 % (FWHM) for the 511 keV photopeak.

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Section: Basic Design Considerations 21 Czt Detector Assemblymentioning

confidence: 99%