Stray-Light Suppression of the Internally Occulted Reflecting Solar Corona Imager

doi:10.3389/fphy.2022.890197

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	Stray-Light Suppression of the Internally Occulted Reflecting Solar Corona Imager
	G. Zhang; Y. Q. Wang; L. P. He; X. D. Wang; S. Ren; Y. B. Xuan; F. Liu and B. Chen
	2022
发表期刊	Frontiers in Physics
ISSN	2296-424X
卷号	10 页码:11
摘要	In order to achieve a clear observation of the ultra-low brightness solar corona and provide a physical basis for forecasting space weather that seriously affects the human living environment, the stray-light suppression level becomes the key factor affecting the development of the coronagraph. In this study, a stray-light suppression method is adopted for Solar Corona Imager (SCI) which is a dual-waveband internally occulted reflecting coronagraph simultaneously and independently observing the inner corona in the HI Lyman-alpha (121.6 +/- 10 nm) line and white-light (700.0 +/- 40 nm) wavebands with a field-of-view (FOV) from 1.1 to 2.5 R-circle dot (R-circle dot stands for the mean solar radius). The scattered stray-light from the primary mirror, including the surface errors, cosmetic defects, and particulate contamination, is analyzed and suppressed, and the corresponding scattering models are established for simulation based on the laboratory testing. The stray-light measurement results for SCI in the laboratory show that the stray-light level can be suppressed to the order of 10(-8) B-circle dot at 2.5 R-circle dot (B-circle dot is the mean brightness of the solar disk) in the white-light (WL) band, which is consistent with the stray-light level obtained by simulation and verifies the modeling and simulation.
DOI	10.3389/fphy.2022.890197
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收录类别	sci
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67115
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	G. Zhang,Y. Q. Wang,L. P. He,et al. Stray-Light Suppression of the Internally Occulted Reflecting Solar Corona Imager[J]. Frontiers in Physics,2022,10:11.
APA	G. Zhang.,Y. Q. Wang.,L. P. He.,X. D. Wang.,S. Ren.,...&F. Liu and B. Chen.(2022).Stray-Light Suppression of the Internally Occulted Reflecting Solar Corona Imager.Frontiers in Physics,10,11.
MLA	G. Zhang,et al."Stray-Light Suppression of the Internally Occulted Reflecting Solar Corona Imager".Frontiers in Physics 10(2022):11.

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