Subjects: Astronomy >> Astrophysical processes submitted time 2017-10-20 Cooperative journals: 《天文研究与技术》
Abstract：地基太阳望远镜及周边设施在观测运行时被太阳辐射加热，发热表面加热望远镜光路附近的空气形成近表面空气湍流，进而引起像质衰减。改善近表面大气湍流的主要方法是抑制太阳望远镜及周边设施表面与空气的温差。根据辐射涂层表面与空气的温度实测，对辐射涂层抑制太阳望远镜及周边设施发热进行了可行性研究，研究表明所选的辐射涂层具有一定的抑制物体表面与空气温差的能力，辐射涂层相对水冷具有控温效果好、适用范围广等优势，可用于地基太阳望远镜及周边设施表面的温度控制
Subjects: Astronomy >> Astrophysical processes submitted time 2020-05-06 Cooperative journals: 《天文研究与技术》
Abstract： 帕克太阳探测器（Parker Solar Probe，简称PSP）是以现代太阳风和磁重联理论的奠基人——尤金•纽曼•帕克(Eugene Newman Parker) 命名的航天器，将穿过太阳的日冕层，探索航天器从未探测过的区域，对日冕和太阳风的起源和动力学特征进行直接探测，有望破解日冕高温之谜和太阳风速度奇高这两大谜团，其热防护系统遇到的困难和挑战远超目前所有航天器。本文首先介绍了探测太阳的意义和PSP的科学目标，然后简述了PSP轨道和轨道热环境并指出了热防护的难点。分析了PSP热防护系统的结构，然后详细阐述了热防护系统的热盾及迎日涂层、太阳能电池板及冷却系统设计，最后给出了PSP热防护系统对我国抵近太阳探测器热防护系统设计方面的启示。
Subjects: Astronomy >> Astrophysical processes submitted time 2020-05-06 Cooperative journals: 《天文研究与技术》
Abstract： 中国科学院云南天文台首次提出了太阳爆发过程及相应磁场结构抵近探测的科学项目，该项目将对太阳大气及其发生在其中的剧烈活动进行前所未有的近距离测量。项目研制的探测器近日区域运行的时间将超过帕克太阳探测器（Parker Solar Probe，简称PSP）和Solar Orbiter太阳探测器，其热防护系统遇到的困难也远超后两者。本文首先分析了抵近探测器的轨道环境特点，提出了热防护的设计思路，然后给出了具体热防护系统设计、仿真和地面实验方案。初步研究显示，热防护系统的设计方案具有辐射散热好、耐高温、稳定可靠性高等优点。
Subjects: Astronomy submitted time 2024-12-31 Cooperative journals: 《天文学进展》
Abstract： The degradation of telescope image quality caused by atmospheric turbulence is currently an important factor restricting the high-resolution observation capability of ground-based astronomical telescopes. Measuring and calculating the effect of the atmosphere on telescope image quality is an important research direction in the field of astronomical technology. Firstly, the theoretical basis for measuring the effect of the atmosphere on image quality using optical and non-optical methods was elaborated, and representative technical routes, measurement results, and research progress of the two measurement methods were presented. The advantages and disadvantages of these measurement methods were analyzed in depth. Then, the basic principles and applicable ranges of three methods for calculating the effect of the telescope's internal airflow on the image quality of telescopes were summarized, and the advantages and disadvantages of these calculation methods were analyzed in depth. Finally, the technical characteristics of optical and non-optical measurement methods and computational methods were summarized, and an outlook on the future development direction of calculation methods was provided.
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