Performance of the Giant Magellan Telescope phasing system
Performance of the Giant Magellan Telescope phasing system
复制标题
巨型麦哲伦望远镜定相系统的性能
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
B. McLeod
中科院分区：
文献类型：
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作者：
F. Quirós;R. Conan;A. Bouchez;B. McLeod
25.4米的巨型麦哲伦望远镜由七个8.4米的主镜（M1）组成，与格里高利次镜（M2）相匹配。当望远镜在衍射极限自适应光学（AO）观测模式下工作时，M1-M2对段必须被定相到观测波长的一小部分。为了实现这种校正水平，定相系统使用跨视场部署的多个自然导星定相传感器，以向桥接段之间的间隙的边缘传感器提供绝对定相参考。我们将在本文中提出的GMT定相系统的性能表征的端到端的数值模拟的基础上进行的动态光学仿真（DOS）工具，它集成了光学和机械动力学模型的GMT与傅立叶光学模型的AO和定相传感器。在不同的观测条件下，预期的相位性能。
The 25.4m Giant Magellan Telescope consists of seven 8.4 m primary mirror (M1) segments with matching segmentation of the Gregorian secondary mirror (M2). When operating the telescope in the diffraction-limited Adaptive Optics (AO) observing modes, the M1-M2 pairs of segments must be phased to a small fraction of the observing wavelength. To achieve this level of correction, the phasing system uses multiple natural guidestar phasing sensors deployed across the field of view to provide an absolute phasing references to edge sensors bridging the gaps between segments. We will present in this paper the performance characterization of the GMT phasing system based on end-to-end numerical simulations performed with the Dynamic Optical Simulation (DOS) tool, which integrates the optical and mechanical dynamics models of the GMT with the Fourier optics models of AO and phasing sensors. The expected phasing performance under different observing conditions will be presented.