LSST Instrument Concept
LSST Instrument Concept
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LSST 仪器概念
DOI：
10.1117/12.457331
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
G. Muller
中科院分区：
文献类型：
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作者：
B. Starr;C. Claver;S. Wolff;J. Tyson;M. Lesser;L. Daggert;R. Dominguez;R. Gomez;G. Muller
LSST仪器是一种宽视场光学（0.3至1um）成像仪，旨在提供优于0.2弧秒采样的三度视场。LSST的图像表面直径约为55厘米，曲率半径为25米。探测器格式目前被定义为568个2k × 2k设备的圆形马赛克，这些设备在LSST的f/1.25焦比的约束下合成该表面。该相机将提供超过2.2千兆像素的每一个图像与2秒的读出时间。在预期的典型曝光时间短至10秒的情况下，这将产生大约3万亿像素的夜间数据集。LSST仪器的比例相当于47 k × 47 k的正方形马赛克。LSST仪器还将提供过滤机制以及光学快门功能。这种尺寸的成像仪在许多设计领域提出了有趣的挑战，包括探测器，接口电子，数据采集和处理管道，杜瓦瓶的建设，过滤器和快门机制。此外，LSST 3镜光学系统将该仪器置于高度受限的体积中，这些挑战是复杂的。具体的重点是应用于满足定义的科学性能要求，着眼于总成本，系统复杂性，功耗，可靠性和风险。本文将介绍目前的努力，在LSST仪器概念设计。
The LSST Instrument is a wide-field optical (0.3 to 1um) imager designed to provide a three degree field-of-view with better than 0.2 arcsecond sampling. The image surface of the LSST is approximately 55cm in diameter with a curvature radius of 25 meters to flat. The detector format is currently defined to be a circular mosaic of 568 2k × 2k devices faceted to synthesize this surface within the constraints of LSST's f/1.25 focal ratio. This camera will provide over 2.2 Gigapixels per image with a 2 second readout time. With an expected typical exposure time of as short as 10s, this will yield a nightly data set on order of 3 terapixels. The scale of the LSST Instrument is equivalent to a square mosaic of 47k × 47k. The LSST Instrument will also provide a filter mechanism, as well as optical shuttering capability. Imagers of this size pose interesting challenges in many design areas including detectors, interface electronics, data acquisition and processing pipelines, dewar construction, filter and shutter mechanisms. Further more, the LSST 3 mirror optical system places this instrument in a highly constrained volume where these challenges are compounded. Specific focus is being applied to meeting defined scientific performance requirements with an eye to total cost, system complexity, power consumption, reliability, and risk. This paper will describe the current efforts in the LSST Instrument Concept Design.