Study of material uniformity in high-resistivity Cd<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll" id="d1e177" altimg="si5.gif"><mml:msub><mml:mrow/><mml:mrow><mml:mi mathvariant="normal">1−x</mml:mi></mml:mrow></mml:msub></mml:math>Zn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll" id="d1e185" altimg="si25.gif"><mml:msub><mml:mrow/><mml:mrow><mml:mi mathvariant="normal">x</mml:mi></mml:mrow></mml:msub></mml:math>Te and

Brovko, A.; Ruzin, A.

doi:10.1016/j.nima.2019.03.051

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…Trapping is caused by crystal defects such as Te precipitates (e.g. Bolke et al, 2017;Winkler et al, 2019;Kim et al, 2019;Yakimov et al, 2019;Brovko and Ruzin, 2020;McCoy et al, 2020).…”

Section: Trappingmentioning

confidence: 99%

Cadmium Zinc Telluride Detectors for a Next-Generation Hard X-ray Telescope

Tang,

Kislat,

Krawczynski

2021

Preprint

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We are currently developing Cadmium Zinc Telluride (CZT) detectors for a next-generation space-borne hard X-ray telescope which can follow up on the highly successful NuSTAR (Nuclear Spectroscopic Telescope Array) mission. Since the launch of NuSTAR in 2012, there have been major advances in the area of X-ray mirrors, and state-of-the-art X-ray mirrors can improve on NuSTAR's angular resolution of ∼1 arcmin Half Power Diameter (HPD) to 15 or even 5 HPD. Consequently, the size of the detector pixels must be reduced to match this resolution. This paper presents detailed simulations of relatively thin (1 mm thick) CZT detectors with hexagonal pixels at a next-neighbor distance of 150 µm. The simulations account for the non-negligible spatial extent of the deposition of the energy of the incident photon, and include detailed modeling of the spreading of the free charge carriers as they move toward the detector electrodes. We discuss methods to reconstruct the energies of the incident photons, and the locations where the photons hit the detector. We show that the charge recorded in the brightest pixel and six adjacent pixels suffices to obtain excellent energy and spatial resolutions. The simulation results are being used to guide the design of a hybrid application-specific integrated circuit (ASIC)-CZT detector package.

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“…Trapping is caused by crystal defects such as Te precipitates (e.g. Bolke et al, 2017;Winkler et al, 2019;Kim et al, 2019;Yakimov et al, 2019;Brovko and Ruzin, 2020;McCoy et al, 2020).…”

Section: Trappingmentioning

confidence: 99%

Cadmium Zinc Telluride Detectors for a Next-Generation Hard X-ray Telescope

Tang,

Kislat,

Krawczynski

2021

Preprint

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Research Progress on Postgrowth Annealing of Cd₁₋_xMn_xTe Crystals

Jiang

Liu

et al. 2022

Crystal Research and Technology

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Cadmium manganese telluride (Cd1−xMnxTe, abbreviated CMT) crystals have high resistivity, wide bandgap and good carrier transport properties, as well as being superior to traditional CdZnTe crystals in some respects. Therefore, CMT crystals are promising materials for room‐temperature nuclear radiation detectors. However, as‐grown CMT crystals usually include many defects dominated by Te inclusions. These defects greatly affect the device performance. In this paper, main defects such as point defects, dislocations, and inclusions in CMT materials are summarized and discussed. Postgrowth annealing is used to reduce and eliminate defects. It is a great method to improve the properties of as‐grown crystals. Annealing process includes annealing method, atmosphere, temperature, and time. The research progress of annealing process on crystal quality, photoelectric properties, and detector performance is reviewed.

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