Research on the proton-induced radiation damage of pixelated CdZnTe detectors for space applications

IF 2.2 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Experimental Astronomy Pub Date : 2025-04-22 DOI:10.1007/s10686-025-09998-4

Hao Chang, Ming Zeng, Di Wang, Hua Feng, Yang Tian, Ge Ma, Xiaofan Pan, Chen Li, Zhongming Wang, Xin Zhuo, Xutao Zheng, Yulan Li

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Abstract

High-performance pixelated CZT detectors that achieve 3D position sensitivity are promising candidates for use in Compton imaging telescopes. We proposed to use pixelated CZT detectors in the MeV Astrophysical Spectroscopic Surveyor (MASS), which is a large area Compton telescope. Nevertheless, the presence of high-energy protons in space can lead to radiation damage in pixelated CZT detectors, causing their performance to degrade gradually. Using non-ionizing energy loss (NIEL), this study develops a method that quantitatively evaluates the radiation damage of detectors in space. To verify the method, this study irradiated two \(2\times 2\times 1\text { cm}^3\) pixelated CZT detectors with 100 MeV protons at fluences ranging from \(3\times 10^7\text { p}^+/\text {cm}^2\) to \( 3\times 10^9\text { p}^+/\text {cm}^2\) under two bias sets. When the proton fluence reaches \(3 \times 10^9 \text { p}^+/\text {cm}^2\), the energy resolution of the detectors significantly deteriorates to \(3.8\%\) at 511 keV (FWHM/E), even after post-correction. Finally, this study provides engineering considerations for their application in space.

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空间应用像素化CdZnTe探测器质子辐射损伤研究

实现三维位置灵敏度的高性能像素化CZT探测器是康普顿成像望远镜中有希望使用的候选者。我们建议在MeV天体物理光谱测量者（MASS）中使用像素化CZT探测器，这是一个大面积的康普顿望远镜。然而，空间中高能质子的存在会导致像素化CZT探测器的辐射损伤，导致其性能逐渐下降。利用非电离能量损失（NIEL），提出了一种定量评估空间探测器辐射损伤的方法。为了验证该方法，本研究在两个偏置集下，用100 MeV质子照射两个\(2\times 2\times 1\text { cm}^3\)像素化CZT探测器，影响范围从\(3\times 10^7\text { p}^+/\text {cm}^2\)到\( 3\times 10^9\text { p}^+/\text {cm}^2\)。当质子通量达到\(3 \times 10^9 \text { p}^+/\text {cm}^2\)时，探测器的能量分辨率在511 keV （FWHM/E）时显著下降到\(3.8\%\)，即使在校正后也是如此。最后，本研究为其在空间中的应用提供了工程考虑。

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来源期刊

Experimental Astronomy 地学天文-天文与天体物理

CiteScore

5.30

自引率

3.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.