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Fast Dark Signal Measurements of SVOM VT CCDs Using the Vertical Gradient of Dark Field Images
Pan, Yue1,2; Fan, Xuewu1; Zhao, Hui1; Qiu, Yulei3; Gao, Wei1; Zhang, Jian1
2021-04-01
Source PublicationPHOTONICS
Volume8Issue:4Pages:9
AbstractThis paper describes a fast technique for estimating the dark signals of the charge coupled devices (CCDs) of the visible telescope (VT) onboard the space multi-band variable object monitor (SVOM). It is based on the vertical gradient in the dark field images of the frame transfer CCDs. During the process of frame clear, exposure, frame transfer and readout, the characteristic of dark signal accumulation is analyzed firstly. Next, the linear fitting method is used to fit the signal level of the dark field image in the vertical direction, and the slope of the fitting line represents the dark signal factor. This technique only needs one dark field image and can be used for simple and efficient dark signal measurements of frame transfer CCDs. Besides, an experiment of detecting dark signals as a function of temperature based on the fast technique has been carried out. Making use of the Shockley-Hall-Read theory, two curve fitting formulas are adopted to the experimental results for VT Advanced Inverted Mode Operation (AIMO) CCD and VT Non-Inverted Mode Operation (NIMO) CCD respectively. The experimental results and the formulas are used to determine the optimal on-orbit cooling temperature of VT CCDs.
Keywordcharge coupled device (CCD) CCD characterization dark signal vertical gradient SVOM VT
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.3390/photonics8040132
Language英语
Funding ProjectNational Natural Science Foundation of China[61107008] ; National Natural Science Foundation of China[61105017]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaOptics
WOS SubjectOptics
WOS IDWOS:000643501200001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/78144
Collection中国科学院国家天文台
Corresponding AuthorFan, Xuewu
Affiliation1.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
Recommended Citation
GB/T 7714
Pan, Yue,Fan, Xuewu,Zhao, Hui,et al. Fast Dark Signal Measurements of SVOM VT CCDs Using the Vertical Gradient of Dark Field Images[J]. PHOTONICS,2021,8(4):9.
APA Pan, Yue,Fan, Xuewu,Zhao, Hui,Qiu, Yulei,Gao, Wei,&Zhang, Jian.(2021).Fast Dark Signal Measurements of SVOM VT CCDs Using the Vertical Gradient of Dark Field Images.PHOTONICS,8(4),9.
MLA Pan, Yue,et al."Fast Dark Signal Measurements of SVOM VT CCDs Using the Vertical Gradient of Dark Field Images".PHOTONICS 8.4(2021):9.
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