Thermal design of the Solar-C (EUVST) telescope
Thermal design of the Solar-C (EUVST) telescope
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Solar-C (EUVST) 望远镜的热设计
DOI：
10.1117/12.2560941
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Hattori Tomoya
中科院分区：
文献类型：
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作者：
Suematsu Yoshinori;Shimizu Toshifumi;Hara Hirohisa;Kawate Tomoko;Katsukawa Yukio;Ichimoto Kiyoshi;Imada Shinsuke;Nagae Kazuhiro;Yamazaki Atsumu;Hattori Tomoya
Solar-C任务的极紫外高通量光谱望远镜(EUVST)只由两个成像光学部件组成：一个28厘米口径的离轴抛物面主镜和一个在主镜前没有可见光阻挡滤光器的两分裂椭球光栅，在EUV-UV成像光谱观测中实现了前所未有的高空间和时间分辨率。为此，反射镜上的多层膜吸收了约60W的太阳光。我们报道了一种望远镜的热设计，其中主镜粘合部分和底层倾斜和狭缝扫描机构的温度远低于胶粘剂的玻璃化转变温度(约60℃)，主镜的热变形很小，尽管它是不可忽略的小。
The EUV High-Throughput Spectroscopic Telescope (EUVST) of Solar-C mission consists of only two imaging optical components; a 28-cm clear aperture off-axis parabolic primary mirror and a two-split ellipsoidal grating without a blocking filter for visible light before the primary mirror to achieve unprecedented high spatial and temporal resolution in EUV-UV imaging spectroscopic observations. For this reason, about 60 W of sunlight is absorbed by the multilayer coating on the mirror. We report a thermal design of telescope in which the temperature of the primary mirror bonding part and underlying tip-tilt and slit-scanning mechanisms is well lower than a glass transition temperature of adhesive (about 60°C) and thermal deformation of the primary mirror is small, although it is non-negligibly small.