Improving the Performance of Quasi-Hemispherical CdZnTe Detectors Using Infrared Stimulation

Dorogov, P.; Иванов, В. И.; Loutchanski, A.; Grigorjeva, L.; Millers, D.

doi:10.1109/tns.2012.2212460

Cited by 14 publications

(6 citation statements)

References 27 publications

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Among all the electrode geometries, the quasi-hemispherical [11][12][13][14] configuration allows to collect charges over large detector volumes (up to 4 cm 3 ) with a single readout channel. Quasi Hemispherical Detectors (QHDs) do not need Pulse Shaping Analysis algorithm, as opposed to coplanar and VFG, and their state-of-the-art performances are achieved by using the raw spectrum only.

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mentioning

confidence: 99%

Optimization of quasi-hemispherical CdZnTe detectors by means of first principles simulation

Vicini

Zanettini²,

Amadé³

et al. 2023

Sci Rep

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In this paper we present the development of quasi-hemispherical gamma-ray detectors based on CdZnTe. Among the possible single-polarity electrode configurations, such as coplanar, pixelated, or virtual Frisch-grid geometries, quasi-hemispherical detectors are the most cost-effective alternative with comparable raw energy resolution in the high and low energy range. The optimal configuration of the sensor in terms of dimension of the crystals and electrode specifications has been first determined by simulations, and successively validated with experimental measures. Spectra from different sources have been acquired to evaluate the detectors performances. Three types of detectors with different CZT volumes have been fabricated, namely 10 × 10 × 5 mm3, 15 × 15 × 10 mm3 and 20 × 20 × 10 mm3. In the case of 10 × 10 × 5 mm3 crystals, the optimum pixel size determined by our simulation tool was confirmed by experiments: the best spectroscopic resolution of 1.3% at 662 keV has been found for a 750 μm diameter pixel detector. The best energy resolution values obtained for the 15 × 15 × 10 mm3 and 20 × 20 × 10 mm3 detectors were respectively 1.7% and 2.7% at 662 keV.

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“…

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mentioning

confidence: 99%

Optimization of quasi-hemispherical CdZnTe detectors by means of first principles simulation

Vicini

Zanettini²,

Amadé³

et al. 2023

Sci Rep

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“…The CZT detector, manufactured by the BSI company [6,7], has been used for research. The detector has pseudo spherical geometry [8] (figure 1) and size 15 × 15 × 7 mm 3 .…”

Section: Structure and Characteristics Of Czt Detectormentioning

confidence: 99%

Study of characteristics of CdZnTe detector

et al. 2019

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“…Attempts to use IR illumination to improve the characteristics of different types of CZT detectors have been described in [14][15][16][17]. In [18,19], it was shown that the correctly chosen intensity and wavelength of IR illumination could significantly affect the characteristics of CZT quasi-hemispherical detectors operating at high-radiation fluxes.…”

Section: Introductionmentioning

confidence: 99%

“…It was previously shown that the use of IR illumination positively affects the characteristics of quasi-hemispherical detectors when operating at low temperatures [18]. IR illumination is a low-energy consumption means being able to stabilize the characteristics of detectors at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

Use of CdZnTe Quasi-Hemispherical Detectors under the Impact of Low Temperatures and High-Gamma Radiation Fluxes

Ivanov,

Fjodorovs,

Loutchanski

et al. 2023

Sensors

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This article discusses the possibilities and limitations of CdZnTe (CZT) quasi-hemispherical detectors operating over a wide temperature range and at high-gamma radiation fluxes. The results of the negative influence of low- and high-operating temperatures, as well as high-radiation fluxes on spectrometric characteristics of CZT detectors and possible ways to eliminate performance deterioration, are presented. The impact of infrared (IR) illumination parameters, such as wavelength and irradiation intensity on the spectroscopy performance of detectors, was investigated. A correctly chosen IR illumination wavelength and intensity were shown to significantly improve the energy resolution of CZT quasi-hemispherical detectors, allowing their stable operation in high-gamma radiation fluxes and extend the operating temperature range toward low temperatures. The influences of bias voltage values and temperatures on the quasi-hemispherical CZT detectors’ operating ability at high-gamma radiation fluxes were studied.

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Improving the Performance of Quasi-Hemispherical CdZnTe Detectors Using Infrared Stimulation

Cited by 14 publications

References 27 publications

Optimization of quasi-hemispherical CdZnTe detectors by means of first principles simulation

Optimization of quasi-hemispherical CdZnTe detectors by means of first principles simulation

Study of characteristics of CdZnTe detector

Use of CdZnTe Quasi-Hemispherical Detectors under the Impact of Low Temperatures and High-Gamma Radiation Fluxes

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