The Lyman-alpha Imager onboard Solar Polar Orbit Telescope
The Lyman-alpha Imager onboard Solar Polar Orbit Telescope
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DOI：
10.1117/12.2035494
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
Baoquan Li;Haitao Li;S. Zhou;Bo Jiang
中科院分区：
文献类型：
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作者：
Baoquan Li;Haitao Li;S. Zhou;Bo Jiang
太阳极轨道望远镜（SPORT）最初由中国科学院国家空间科学中心于2004年提出，目前国内正处于背景工程研究阶段。 SPORT将携带一套遥感和现场仪器来观测日冕物质抛射（CME）、太阳高纬度磁力以及来自绕太阳极地轨道的快速太阳风。 Lyman-alpha 成像仪 (LMI) 是 SPORT 上的关键遥感仪器之一，具有 45 弧分视场、2000 毫米有效焦距和 1.4 弧秒/像素空间分辨率。 LMI尺寸为φ150×1000mm，重量小于10kg，包括7kg望远镜筒和3kg电子盒。 LMI光路中使用了三个121.6nm滤光片，因此可以实现121.6nm光谱纯度为98%的图像。 121.6nm 太阳莱曼-α 线在色球层中产生，对色球层中的等离子体温度、等离子体速度和磁力变化非常敏感。太阳莱曼阿尔法圆盘图像是日冕磁力变化的理想跟踪器。
Solar Polar ORbit Telescope (SPORT) was originally proposed in 2004 by the National Space Science Center, Chinese Academy of Sciences, which is currently being under background engineering study phase in China. SPORT will carry a suite of remote-sensing and in-situ instruments to observe coronal mass ejections (CMEs), solar high-latitude magnetism, and the fast solar wind from a polar orbit around the Sun. The Lyman-alpha Imager (LMI) is one of the key remotesensing instruments onboard SPORT with 45arcmin FOV, 2000mm effective focal length and 1.4arcsec/pixel spatial resolution . The size of LMI is φ150×1000mm, and the weight is less than10kg, including the 7kg telescope tube and 3kg electronic box. There are three 121.6nm filters used in the LMI optical path, so the 98% spectral purity image of 121.6nm can be achieved. The 121.6nm solar Lyman-alpha line is produced in the chromosphere and very sensitive to plasma temperature, plasma velocity and magnetism variation in the chromosphere. Solar Lyman-alpha disk image is an ideal tracker for corona magnetism variation.