GMT integral-field spectrograph (GMTIFS) conceptual design
GMT integral-field spectrograph (GMTIFS) conceptual design
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GMT 积分场摄谱仪 (GMTIFS) 概念设计
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
Peter C. Young
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文献类型：
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作者：
P. Mcgregor;G. Bloxham;R. Boz;John Davies;Matthew C. Doolan;Michael Ellis;J. Hart;Damian Jones;Lance Luvaul;Jon Nielsen;S. Parcell;R. Sharp;D. Stevanovic;Peter C. Young
巨型麦哲伦望远镜(GMT)积分场光谱仪是直径25米的巨型麦哲伦望远镜六种潜在的第一光仪器之一。澳大利亚国立大学已经完成了GMTIF的概念设计研究。总结了GMTIF的科学案例，并描述了其仪器能力和设计挑战。GMTIFS将成为GMT的主要自适应光学仪器。它包括一个积分场光谱仪(IFS)和进入科学领域的成像仪，以及一个在90弧秒半径导向场巡逻的仪器上的波前传感器(OIWFS)。GMTIF将涉及从再电离研究的时代到形成高红移星系以及我们银河系中恒星和行星形成的广泛科学。它将充分利用望远镜上的激光层析自适应光学(LTAO)系统。这带来了严格的图像质量和定位稳定性要求，增加了设计的复杂性。工业装置中的某些低温装置必须设置为~1μm精度。OIWFS中的光束操纵机构必须在导向场上设置为毫弧秒精度，对应于f/8焦平面上的~1μm精度。差动大气色散也必须修正到毫角秒精度。提出并讨论了解决这些问题和其他问题的概念设计解决方案。
The Giant Magellan Telescope (GMT) Integral-Field Spectrograph (GMTIFS)c is one of six potential first-light instruments for the 25m-diameter Giant Magellan Telescope. The Australian National University has completed a Conceptual Design Study for GMTIFS. The science cases for GMTIFS are summarized, and the instrument capabilities and design challenges are described. GMTIFS will be the work-horse adaptive-optics instrument for GMT. It contains an integral-field spectrograph (IFS) and Imager accessing the science field, and an On-Instrument Wave-Front Sensor (OIWFS) that patrols the 90 arcsec radius guide field. GMTIFS will address a wide range of science from epoch of reionization studies to forming galaxies at high redshifts and star and planet formation in our Galaxy. It will fully exploit the Laser Tomography Adaptive Optics (LTAO) system on the telescope. The tight image quality and positioning stability requirements that this imposes drive the design complexity. Some cryogenic mechanisms in the IFS must set to ~ 1 μm precision. The Beam-Steering mechanism in the OIWFS must set to milli-arcsecond precision over the guide field, corresponding to ~ 1 μm precision in the f/8 focal plane. Differential atmospheric dispersion must also be corrected to milli-arcsecond precision. Conceptual design solutions addressing these and other issues are presented and discussed.