Irradiation study of liquid crystal variable retarder for Full-disk Magneto-Graph payload onboard ASO-S mission
Irradiation study of liquid crystal variable retarder for Full-disk Magneto-Graph payload onboard ASO-S mission
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ASO-S 任务中全盘磁图有效载荷液晶可变延迟器的辐照研究
DOI：
10.1088/1674-1056/ab8c40
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发表时间：
2020-07
影响因子：
1.7
通讯作者：
Deng Yuan-Yong
中科院分区：
文献类型：
--
作者：
Hou Jun-Feng;Wang Hai-Feng;Wang Gang;Luo Yong-Quan;Li Hong-Wei;Zhang Zhen-Long;Wang Dong-Guang;Deng Yuan-Yong
高级天基太阳观测站（ASO-S）是中国太阳物理学界提出的一项使命。作为ASO-S的三大有效载荷之一，FMG将以高时空分辨率、高磁灵敏度测量整个太阳盘面的光球磁场，其中液晶可变延迟器（LCVR）是FMG能否实现其科学目标的关键。到目前为止，LCVR还没有太空飞行经验。因此，为确保其在空间应用中的安全性和可靠性，对其进行辐照研究就显得尤为重要和迫切。本文分别对λ辐照、质子辐照和紫外辐照等三种辐照方式进行了实验研究。对辐照过程中的光学和化学性质进行了测量和分析。在光学特性方面，除了延迟量外，FMG有效载荷的其他参数没有明显变化。虽然在辐照期间延迟与电压的关系没有急剧退化，但延迟变化的量远高于仪器要求。因此，飞行中的延迟与电压的关系应该被添加到FMG有效载荷中，以减少或甚至避免延迟变化的影响。在化学性质方面，液晶材料的清亮点和双折射几乎没有变化，离子密度在60 krad [Si]以下没有变化，但在60 krad [Si]以上开始急剧增加。（文件）
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, λ 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].(paper)
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DOI：
10.1117/12.857817
发表时间：
2010-05
期刊：
--
影响因子：
--
作者：
F. Bettonvil;M. Collados;A. Feller;B. Gelly;C. Keller;T. Kentischer;A. Ariste;O. Pleier;F. Snik;H. Socas-Navarro
通讯作者：
F. Bettonvil;M. Collados;A. Feller;B. Gelly;C. Keller;T. Kentischer;A. Ariste;O. Pleier;F. Snik;H. Socas-Navarro
影响因子：
0.9
作者：
S. Keil;T. Rimmele;C. Keller
通讯作者：
S. Keil;T. Rimmele;C. Keller
影响因子：
2.4
作者：
Oton, Eva;Perez-Fernandez, Javier;Geday, Morten A.
通讯作者：
Geday, Morten A.
影响因子：
4.2
作者：
C. Woehrle;D. Doyle;S. Lane;C. Christodoulou
通讯作者：
C. Woehrle;D. Doyle;S. Lane;C. Christodoulou
影响因子：
1.3
作者：
S. Lane;Jacob E. Brown;M. Tremer;C. Uber;Elizabeth E. Gallagher;S. Collins;Michael R. Benoit
通讯作者：
S. Lane;Jacob E. Brown;M. Tremer;C. Uber;Elizabeth E. Gallagher;S. Collins;Michael R. Benoit