The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - II. design of LST

doi:10.1088/1674-4527/19/11/159

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	The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - II. design of LST
	B.Chen; H.Li; K.F.Song; Q.F.Guo; P.J.Zhang; L.P.He; S.Dai
	2019
发表期刊	Research in Astronomy and Astrophysics
ISSN	1674-4527
卷号	19 期号:11 页码:16
摘要	As one of the three payloads for the Advanced Space-based Solar Observatory (ASO-S) mission, the Lyman-alpha (Ly alpha) Solar Telescope (LST) is composed of three instruments: a Solar Corona Imager (SCI), a Ly alpha Solar Disk Imager (SDI) and a full-disk White-light Solar Telescope (WST). When working in-orbit, LST will simultaneously perform high-resolution imaging observations of all regions from the solar disk to the inner corona up to 2.5R(circle dot) (R-circle dot stands for the mean solar radius) with a spatial resolution of 4.8 '' and 1.2 '' for coronal and disk observations, respectively, and a temporal resolution of 30-120 s and 1-120 s for coronal and disk observations, respectively. The maximum exposure time can be up to 20 s due to precise pointing and image stabilization function. Among the three telescopes of LST, SCI is a dual-waveband coronagraph simultaneously and independently observing the inner corona in the HI Ly alpha (121.6 +/- 10nm) line and white light (WL) (700 +/- 40 nm) wavebands by using a narrowband Ly alpha beam splitter and has a field of view (FOV) from 1.1 to 2.5R(circle dot). The stray-light suppression level can attain <10(-6) B-circle dot (B-circle dot is the mean brightness of the solar disk) at 1.1R(circle dot) and <= 5x10(-8) B-circle dot at 2.5R(circle dot). SDI and WST are solar disk imagers working in the Ly alpha line and 360.0 nm wavebands, respectively, which adopt an off-axis two-mirror reflective structure with an FOV up to 1.2R(circle dot), covering the inner coronal edge area and relating to coronal imaging. We present the up-to-date design for the LST payload.
关键词	telescopes,instrumentation: high angular resolution
DOI	10.1088/1674-4527/19/11/159
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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/181722/63463
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	B.Chen,H.Li,K.F.Song,et al. The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - II. design of LST[J]. Research in Astronomy and Astrophysics,2019,19(11):16.
APA	B.Chen.,H.Li.,K.F.Song.,Q.F.Guo.,P.J.Zhang.,...&S.Dai.(2019).The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - II. design of LST.Research in Astronomy and Astrophysics,19(11),16.
MLA	B.Chen,et al."The Lyman-alpha Solar Telescope (LST) for the ASO-S mission - II. design of LST".Research in Astronomy and Astrophysics 19.11(2019):16.

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