阿塔卡马望远镜（Atacama Telescope）
The Cornell Caltech Atacama Telescope
摘要：
康奈尔大学、加州理工学院和喷气推进实验室正在共同研究在智利北部的一座高山上建造一台25米直径的亚毫米天文望远镜。这台康奈尔加州理工学院阿塔卡马望远镜（CCAT）将结合高灵敏度，宽视场和宽波长范围，为深度，大面积，多色亚毫米测量提供前所未有的能力，以补充窄场，高分辨率的ALMA研究。CCAT观测将涉及当代天文学的基本主题，特别是星系的形成和演化、构成宇宙大部分内容的暗物质和暗能量的性质、恒星和行星的形成、星周盘的条件以及太阳系早期历史的条件。CCAT的候选站点位于智利北部5600米处，具有极好的观测条件。为了适应大幅面测辐射热计相机，CCAT设计有20弧分的视场。CCAT将采用其分段主镜的闭环主动控制，以保持10妈妈rms或less. Instrumentation半波前误差正在考虑包括短（650妈妈-200妈妈）和长（2毫米-750妈妈）波长测辐射热仪相机，直接检测光谱仪，和外差接收器阵列。科罗拉多大学，加拿大大学联盟，和英国天文技术中心代表英国社区正在寻求参与CCAT联盟。在下一个十年初完成时，CCAT将成为同类设施中最大和最敏感的设施，也是地球上海拔最高的天文设施。
英文摘要：
Cornell University, the California Institute for Technology, and the Jet Propulsion Laboratory are jointly studying the construction of a 25 m diameter telescope for submillimeter astronomy on a high mountain in northern Chile. This Cornell Caltech Atacama Telescope (CCAT) will combine high sensitivity, a wide field of view, and a broad wavelength range to provide an unprecedented capability for deep, large area, multi-color submillimeter surveys to complement narrow field, high resolution studies with ALMA. CCAT observations will address fundamental themes in contemporary astronomy, notably the formation and evolution of galaxies, the nature of the dark matter and dark energy that comprise most of the content of the universe, the formation of stars and planets, the conditions in circumstellar disks, and the conditions during the early history of the Solar system. The candidate CCAT site, at 5600 m in northern Chile, enjoys superb observing conditions. To accommodate large format bolometer cameras, CCAT is designed with a 20 arcmin field of view. CCAT will incorporate closed loop active control of its segmented primary mirror to maintain a half wavefront error of 10 mum rms or less. Instrumentation under consideration includes both short (650 mum-200 mum) and long (2 mm-750 mum) wavelength bolometer cameras, direct detection spectrometers, and heterodyne receiver arrays. The University of Colorado, a Canadian university consortium, and the UK Astronomy Technology Centre on behalf of the UK community are pursuing participation in the CCAT consortium. When complete early in the next decade, CCAT will be the largest and most sensitive facility of its class as well as the highest altitude astronomical facility on Earth.
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