The MOAO system of the IRMOS near-infrared multi-object spectrograph for TMT
The MOAO system of the IRMOS near-infrared multi-object spectrograph for TMT
复制标题
TMT用IRMOS近红外多目标光谱仪MOAO系统
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
W. Rambold
中科院分区：
文献类型：
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作者：
D. Andersen;S. Eikenberry;M. Fletcher;W. Gardhouse;B. Leckie;J. Véran;D. Gavel;R. Clare;R. Guzmán;L. Jolissaint;Roger E. Julian;W. Rambold
用于 TMT 的近红外多目标光谱仪 (IRMOS) 是迄今为止最强大的天文仪器之一。 TMT 的采集区域、多目标自适应光学 (MOAO) 系统独特的图像锐化功能以及 IRMOS 后端提供的多目标积分场光谱的多重优势相结合，使其能够解决未来几十年的一些领先科学挑战。在这里，我们概述了一种潜在的 IRMOS 概念，然后重点关注 MOAO 系统。我们将特别描述我们的激光和自然导星波前传感器、可变形镜和 MOAO 校准系统的概念。对于每个设计元素，我们描述了有助于定义每个子系统的关键权衡研究。根据我们的研究结果，我们编制了 MOAO ensquared 能源预算。我们发现，对于 1.65μm 波长，50% 的能量集中在 IRMOS 积分场单元的 50 毫角秒空间像素内。考虑到 MOAO 系统实现此性能的要求，对于大于 1.5μm 的波长，可以使用更精细的板尺度来实现大平方能量。
The near-Infrared Multi-Object Spectrograph (IRMOS) for TMT is one of the most powerful astronomical instruments ever envisioned. The combination of the collecting area of TMT, the unique image-sharpening capabilities of the Multi-Object Adaptive Optics (MOAO) system, and the multiplexing advantage of the multi-object integral-field spectra provided by the IRMOS back-end make it capable of addressing some of the leading scientific challenges of the coming decades. Here we present an overview of one potential IRMOS concept and then focus on the MOAO system. In particular we will describe our concept for the laser and natural guide star wavefront sensors, deformable mirrors and the calibration system of MOAO. For each of these design elements, we describe the key trade studies which help define each subsystem. From results of our studies, we assemble a MOAO ensquared energy budget. We find that 50% of the energy is ensquared within the 50 milli-arcsecond spatial pixel of the IRMOS integral field units for a wavelength of 1.65μm. Given the requirements placed on the MOAO system to achieve this performance, large ensquared energies can be achieved with even finer plate scales for wavelengths longer than 1.5μm.