Study of Slitless Imaging Technique of Solar Extreme Ultraviolet Spectrometer
-
摘要: 传统极紫外成像光谱仪无法实时观测大范围的太阳活动.无缝成像技术使得光谱仪能够获得大视场范围内的太阳空间信息和光谱信息.通过无缝成像光谱仪成果分析,提出了一种改进的光学设计思路,并通过模拟数据重建证明其能够大幅提高多普勒速度反演的准确性,从而极大提高了观测数据的可信度.Abstract: Solar imaging spectrometer in the extreme ultraviolet band is an important kind of instrument for solar observation. But traditional solar imaging spectrometer cannot observe the Sun in a large field of view simultaneously. Slitless imaging spectrometer allows imaging spectroscopy with high spatial and temporal resolution. Slitless imaging technique is a revolutionary technique for solar research in the extreme ultraviolet band. In this paper, a reconstruction algorithm is studied which has been used in a slitless imaging spectrometer, but it is found that there is a systematic error in the reconstruction result. A new optical design is proposed to solve this problem. By reconstructing the simulated data, the effectiveness of this design is proved. The reconstruction of new design shows better measurement accuracy in Doppler velocity. It will provide more accurate data for space weather studies.
-
Key words:
- Extreme Ultraviolet (EUV) /
- Spectrometer /
- Slitless imaging /
- Space weather
-
[1] PENG Jilong, ZHU Guangwu, WEI Fei, et al. Solar extreme ultraviolet multichannel imager[J]. Chin. J. Space Sci., 2009, 29(4):417-421(彭吉龙, 朱光武, 韦飞, 等. 太阳极紫外多波段成像仪[J]. 空间科学学报, 2009, 29(4):417-421) [2] LI Baoquan, ZHU Guangwu, Wang Shijin, et al. The solar X-EUV imaging telescope[J]. Chin. J. Geophys., 2005, 48(2):235-242(李保权, 朱光武, 王世金, 等. 太阳X-EUV成像望远镜[J]. 地球物理学报, 2005, 48(2):235-242) [3] MOSES D, CLETTE F, DELABOUDINIÈRE J P, et al. EIT observations of the extreme ultraviolet Sun[M]//The First Results from SOHO. Berlin: Springer Netherlands, 1997:571-599 [4] CULHANE J L, HARRA L K, JAMES A M, et al. The EUV imaging spectrometer for Hinode[J]. Solar Phys., 2007, 243(1):19-61 [5] YOUNG P R, ZANNA D G, MASON H E, et al. EUV emission lines and diagnostics observed with Hinode/EIS[J]. Publ. Astron. Soc. Jpn., 2007, 59(sp3): S857-S864 [6] SETTELE A, CARROLL T A, NICKELT I, et al. Systematic errors in measuring solar magnetic fields with a FPI spectrometer and MDI[J]. Astron. Astrophys., 2002, 386(3):1123-1128 [7] KANKELBORG C C, THOMAS R J. Simultaneous imaging and spectroscopy of the solar atmosphere: advantages and challenges of a 3-order slitless spectrograph[J]. Proc. SPIE, 2001, 4498:16-26 [8] FOX J L, KANKELBORG C C, THOMAS R J. A transition region explosive event observed in He Ⅱ with the MOSES sounding rocket[J]. Astrophys. J., 2010, 719(2):1132-1143 [9] FOX J L, KANKELBORG C C, METCALF T R. Data inversion for the multi-order solar extreme-ultraviolet spectrograph[J]. Proc. SPIE, 2003, 5157:124-132 [10] FOX J L. Snapshot Imaging Spectroscopy of the Solar Transition Region: the Multi-Order Solar EUV Spectrograph (MOSES) Sounding Rocket Mission[D]. Bozeman, Montana: Montana State University, 2013 [11] KIRKPATRICK S, GELATT C D, VECCHI M P. Optimization by simulated annealing[J]. Science, 1983, 220(4598):671-680 [12] BARANIUK R G. A lecture on compressive sensing[J]. IEEE Sign. Proc. Mag., 2007, 24(4):1-9
点击查看大图
计量
- 文章访问数: 1151
- HTML全文浏览量: 78
- PDF下载量: 2502
- 被引次数: 0