基于莱曼阿尔法日冕仪应用的121.6nm窄带反射干涉滤光片研制及其空间适应性研究

太阳是地球能量的来源，对太阳的观测研究是天文学研究的重点。太阳莱曼阿尔法波段成像和日冕观测研究是太阳研究的一个全新的手段，此项研究有创新，有望观测到未知现象，发现新的太阳活动机制。.121.6nm窄带反射干涉滤光片(NRIF)是莱曼阿尔法日冕仪的关键光学元件。本项目拟开展121.6nm NRIF设计和膜系优化工作；开展Al/MgF2, LaF3/MgF2, BaF2/MgF2等多种材料对镀膜工艺研究，制备121.6nm NRIF；研究不同材料对镀制的NRIF的光谱性能（反射率，带宽）、材料特性（非均质性，应力）、空间适应性（高能粒子及紫外辐照，高温）；研制出光谱性能优良（反射率>20%,带宽±2nm）、带外抑制效果好、稳定、抗高能粒子及紫外辐照、耐高温、适合空间应用的121.6nm NRIF。为我国早日实现在空间环境下莱曼阿尔法日冕成像观测打下坚实的基础。

The Sun is the source of energy for Earth, and observational study of the Sun is a key part in astronomy research. Study on imaging of solar Lyman-alpha line and corona observation is a new method for the Sun research, this research is innovative, and it will hopefully contribute most to observing unknown phenomenon and finding new mechanism of solar activity variation. . 121.6nm narrow-band reflectance interference filter (NRIF) is a key optical component in Lyman-alpha coronagraph. We plan to carry out the design and optimization of 121.6nm NRIF; We plan to study on deposition process of Al/MgF2, LaF3/MgF2, and BaF2/MgF2 material pairs, and prepare three kinds of 121.6nm NRIF; We plan to conduct research on three kinds of prepared 121.6nm NRIF from several aspects, such as spectral performances (reflectance, band width), material properties (inhomogeneity, stress), and space adaptability (irradiation of high-energy particles and ultraviolet lines, high temperature). The obtained 121.6nm NRIF has excellent spectral performances (reflectance>20%, band width ±2nm), high out-off-band suppression and stability, good resistance to irradiation of high-energy particles and ultraviolet lines, and it withstands high heat, and it suits for space application. This research will lay a solid foundation for early achievement of imaging detection of Lyman-alpha corona in space for our country.