Preparation of AO-related observations and post-processing recipes for E-ELT HARMONI-SCAO
Preparation of AO-related observations and post-processing recipes for E-ELT HARMONI-SCAO
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为 E-ELT HARMONI-SCAO 准备 AO 相关观测结果和后处理配方
DOI：
10.1117/12.2231291
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
H. Schnetler
中科院分区：
文献类型：
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作者：
N. Schwartz;J. Sauvage;C. Correia;B. Neichel;L. Blanco;T. Fusco;A. Pécontal;A. Jarno;L. Piquéras;K. Dohlen;K. El Hadi;N. Thatte;I. Bryson;F. Clarke;H. Schnetler
HARMONI是一个可见光和近红外积分场摄谱仪，被设计成欧洲极大望远镜上的第一个光仪器。它将使用单共轭和激光断层自适应光学，以充分利用高性能和天空覆盖。使用一个快速AO建模工具箱，我们模拟的点扩散函数的单共轭自适应光学的HARMONI的非等晕效应。我们调查的退化的校正性能相对于离轴距离的斯特列尔比和能量。此外，我们分析了自然引导源的大小，AO采样频率和子孔径的数量对性能的影响。我们表明，除了预期的PSF退化的字段方向，PSF保留一个相干的核心，即使在大的离轴距离。我们证明了大的性能改善微调的采样频率为二聚体自然指南星和改善约。SR可达到标称情况以上的50%。我们表明，使用一个较小的AO系统，只有20 × 20的子孔径，它是可能的，以进一步提高性能，并保持相当的性能，即使是大的离轴角。
HARMONI is a visible and near-infrared integral field spectrograph designed to be a first-light instrument on the European extremely large telescope. It will use both single-conjugate and laser tomographic adaptive optics to fully exploit high-performance and sky coverage. Using a fast AO modelling toolbox, we simulate anisoplanatism effects on the point spread function of the single-conjugate adaptive optics of HARMONI. We investigate the degradation of the correction performance with respect to the off-axis distance in terms of Strehl ratio and ensquared energy. In addition, we analyse what impact the natural guide source magnitude, AO sampling frequency and number of sub-apertures have on performance. We show, in addition to the expected PSF degradation with the field direction, that the PSF retains a coherent core even at large off-axis distances. We demonstrated the large performance improvement of fine tuning the sampling frequency for dimer natural guide stars and an improvement of approx. 50% in SR can be reached above the nominal case. We show that using a smaller AO system with only 20x20 sub-apertures it is possible to further increase performance and maintain equivalent performance even for large off-axis angles.
HARMONI 的自适应光学系统：E-ELT 的可见光和近红外积分场光谱仪
DOI：
10.1117/12.857507
发表时间：
2010
期刊：
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影响因子：
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作者：
Fusco T
通讯作者：
Fusco T