中国巨型太阳望远镜热光栏光学分析

Heat stop optical analysis for Chinese giant solar telescope

中国巨型太阳望远镜(CGST)采用共轴格里高利光学系统,主镜直径8m,焦比为1。热光栏是中国巨型太阳望远镜(CGST)的一个核心结构,安装在主焦点位置,热光栏反射掉大部分热量(约为29kW),但是本身也会吸收一小部分热量。对热光栏结构进行设计,运用TracePro软件模拟分析太阳中心观测,太阳边缘观测,内冕观测和超出范围观测4种情况下太阳的辐照度分布,并计算得出了热光栏各部分的辐射分布,为设计后续的冷却系统提供了数据参考。

Chinese giant solar telescope（CGST） is an on-axis Gregorian telescope, equipped with a 8 m diameter primary mirror and focal ratio of 1. The heat stop is a key component for the 8 m CGST, positioned at the primary focus, able to remove a heat load of 29 kW, while it ab-sorbs a small portion of the heat at the same time. The geometry of the heat stop was de-signed, and four cases of sun-centered observations, limb observations, extreme coronal obser-vations, out of range observations were emphatically simulated and analyzed with TracePro, calculating the irradiance distribution on elements of the heat stop, which provided data for the design of follow-up cooling system.