中国物理B ›› 2020, Vol. 29 ›› Issue (7): 74208-074208.doi: 10.1088/1674-1056/ab8c40
• SPECIAL TOPIC—Ultracold atom and its application in precision measurement • 上一篇 下一篇
Irradiation study of liquid crystal variable retarder for Full-disk Magneto-Graph payload onboard ASO-S mission
Jun-Feng Hou(侯俊峰), Hai-Feng Wang(王海峰), Gang Wang(王刚), Yong-Quan Luo(骆永全), Hong-Wei Li(李宏伟), Zhen-Long Zhang(张振龙), Dong-Guang Wang(王东光), Yuan-Yong Deng(邓元勇)
- 1 Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
2 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;
3 National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;
4 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China
Irradiation study of liquid crystal variable retarder for Full-disk Magneto-Graph payload onboard ASO-S mission
Jun-Feng Hou(侯俊峰)1,4, Hai-Feng Wang(王海峰)2, Gang Wang(王刚)1,4, Yong-Quan Luo(骆永全)2, Hong-Wei Li(李宏伟)3, Zhen-Long Zhang(张振龙)3, Dong-Guang Wang(王东光)1, Yuan-Yong Deng(邓元勇)1,4
- 1 Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
2 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;
3 National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;
4 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China
摘要： The Advanced Space-based Solar Observatory (ASO-S) is a mission proposed by the Chinese Solar Physics Community. As one of the three payloads of ASO-S, the Full-disc Magneto-Graph (FMG) will measure the photospheric magnetic fields of the entire solar disk with high spatial and temporal resolution, and high magnetic sensitivity, where liquid crystal variable retarder (LCVR) is the key to whether FMG can achieve its scientific goal. So far, there is no space flight experience for LCVR. Therefore, irradiation study for LCVRs becomes more important and urgent in order to make sure their safety and reliability in space application. In this paper, γ irradiation, proton irradiation, and ultra-violet (UV) irradiation are tested for LCVRs respectively. The optical and chemical properties during irradiation tests are measured and analyzed. For optical properties, there is no significant change in those parameters FMG payload concerned except the retardation. Although there is no drastic degradation in the retardation versus voltage during irradiations, the amount of retardation variation is much higher than the instrument requirements. Thus, an in-flight retardation versus voltage should be added in FMG payload, reducing or even avoiding the impact of retardation change. For chemical properties, the clearing point and birefringence of the LC materials almost have no change; the ion density dose not change below 60 krad[Si], but begin to increase dramatically above 60 krad[Si].
中图分类号: (Environmental and radiation effects on optical elements, devices, and systems)
- 42.88.+h