Accurate Determination of Conversion Gains of SVOM VT CCDs Based on a Signal-Dependent Charge-Sharing Mechanism | |
Pan, Yue1,2; Fan, Xuewu1; Wang, Hu1; Zhao, Hui1; Qiu, Yulei3; Gao, Wei1; Zhang, Jian1 | |
作者部门 | 空间光学技术研究室 |
2021-04 | |
发表期刊 | ELECTRONICS |
ISSN | 2079-9292 |
卷号 | 10期号:8 |
产权排序 | 1 |
摘要 | The signal-variance method and the photon transfer curve method are the most valuable tools for calculating the conversion gains of charge-coupled device (CCD) detectors. This paper describes the phenomena that arise in the conversion gain measurements of space multi-band variable object monitor (SVOM) visible telescope (VT) CCDs, where the results of the signal-variance method increase with the image gray level, and the results of the photon transfer curve method appear with nonlinearity, which is caused by the signal-dependent charge sharing mechanism of back-illuminated CCDs. A numerical simulation model based on random variables was adopted to analyze the influence of the mechanism on the gain determination. The model simulates all the signals and noise in the flat field image, including the photon signal and photon-shot noise, readout noise, fixed pattern noise, and the signal-dependent charge-sharing signal, and it demonstrated agreement with the experimental data. Then, we proposed a quadratic polynomial curve-fitting formula for the photon transfer curve, and we quantitatively analyzed the relationship between the fitting coefficients and the gain, the signal-dependent charge sharing coefficient, and the full well capacity using the control variable method. Finally, the formula was used to accurately determine the conversion gains of SVOM VT CCDs. |
关键词 | photon transfer curve charge coupled device (CCD) CCD characterization conversion gain SVOM VT |
DOI | 10.3390/electronics10080931 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000644013000001 |
出版者 | MDPI |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.opt.ac.cn/handle/181661/94724 |
专题 | 空间光学技术研究室 |
通讯作者 | Fan, Xuewu |
作者单位 | 1.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China |
推荐引用方式 GB/T 7714 | Pan, Yue,Fan, Xuewu,Wang, Hu,et al. Accurate Determination of Conversion Gains of SVOM VT CCDs Based on a Signal-Dependent Charge-Sharing Mechanism[J]. ELECTRONICS,2021,10(8). |
APA | Pan, Yue.,Fan, Xuewu.,Wang, Hu.,Zhao, Hui.,Qiu, Yulei.,...&Zhang, Jian.(2021).Accurate Determination of Conversion Gains of SVOM VT CCDs Based on a Signal-Dependent Charge-Sharing Mechanism.ELECTRONICS,10(8). |
MLA | Pan, Yue,et al."Accurate Determination of Conversion Gains of SVOM VT CCDs Based on a Signal-Dependent Charge-Sharing Mechanism".ELECTRONICS 10.8(2021). |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Accurate Determinati(2280KB) | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 请求全文 |
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