Adaptive optics for MOSAIC: design and performance of the wide(st)-field AO system for the E-ELT
Adaptive optics for MOSAIC: design and performance of the wide(st)-field AO system for the E-ELT
复制标题
MOSAIC 的自适应光学器件：E-ELT 宽场 AO 系统的设计和性能
DOI：
10.1117/12.2232411
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发表时间：
2016
影响因子：
4.8
通讯作者：
G. Rousset
中科院分区：
文献类型：
--
作者：
Tim Morris;A. Basden;T. Buey;F. Chemla;J. Conan;E. Fitzsimons;T. Fusco;E. Gendron;F. Hammer;P. Jagourel;C. Morel;R. Myers;B. Neichel;C. Petit;M. Rodrigues;G. Rousset
MOSAIC是为E-ELT提出的多目标光谱仪，它将利用望远镜提供的尽可能广泛的视野。就自适应光学而言，有两种不同的工作模式需要满足顶级科学要求。MOSAIC高复用模式（HMM）需要在0.6 （NIR）和0.9 （VIS）弧秒的子视场范围内对几百个物体进行视觉限制或GLAO校正。为了实现有限的视觉操作，同时保持科学观测的最大无视场，将需要重新创建与E-ELT主动光学控制相关的预聚焦站中的一些功能。MOSAIC High Definition Mode Control （HDM）在h波段单元150mas内需要25%的Ensquared Energy (EE)，用于分布在整个E-ELT场的大约10个目标，这意味着使用多目标AO （MOAO）。最初的研究表明，为了满足EE要求，同时保持高天空覆盖率，将需要高阶NGS和LGS的波前信号结合起来，为应用于开环MOAO dm的校正提供层析估计。在本文中，我们介绍了当前的MOSAIC AO设计，并提供了基线仪器设计的第一个性能估计。然后，我们报告将在整个A阶段研究过程中进行的各种权衡，例如混合NGS和LGS信号层析成像的要求。最后，我们讨论了这些将如何影响AO架构，MOSAIC设计以及最终在E-ELT上这台宽视场主力机的科学性能。
MOSAIC is the proposed multiple-object spectrograph for the E-ELT that will utilise the widest possible field of view provided by the telescope. In terms of adaptive optics, there are two distinct operating modes required to meet the top-level science requirements. The MOSAIC High Multiplex Mode (HMM) requires either seeing-limited or GLAO correction within a 0.6 (NIR) and 0.9 (VIS) arcsecond sub-fields over the widest possible field for a few hundred objects. To achieve seeing limited operation whilst maintaining the maximum unvignetted field of view for scientific observation will require recreating some of the functionality present in the Pre-Focal Station relating to control of the E-ELT active optics. MOSAIC High Definition Mode Control (HDM) requires a 25% Ensquared Energy (EE) within 150mas in the H-band element for approximately 10 targets distributed across the full E-ELT field, implying the use of Multiple Object AO (MOAO). Initial studies have shown that to meet the EE requirements whilst maintaining high-sky coverage will require the combination of wavefront signals from both high-order NGS and LGS to provide a tomographic estimate for the correction to be applied to the open-loop MOAO DMs. In this paper we present the current MOSAIC AO design and provide the first performance estimates for the baseline instrument design. We then report on the various trade-offs that will be investigated throughout the course of the Phase A study, such as the requirement to mix NGS and LGS signals tomographically. Finally, we discuss how these will impact the AO architecture, the MOSAIC design and ultimately the scientific performance of this wide-field workhorse instrument at the E-ELT.
欧洲极大望远镜在宇宙深场多目标光谱中的宽视场自适应光学性能
影响因子：
4.8
作者：
Basden A
通讯作者：
Basden A
达勒姆极大望远镜自适应光学模拟平台。
影响因子：
1.9
作者：
Basden A
通讯作者：
Basden A
MOAO 首次与 CANARY 进行空中演示
影响因子：
6.5
作者：
Gendron E
通讯作者：
Gendron E