An Engineering Concept and Enabling Technologies for a Large Single Aperture Far-Infrared Observatory (SAFIR)
An Engineering Concept and Enabling Technologies for a Large Single Aperture Far-Infrared Observatory (SAFIR)
复制标题
大型单孔径远红外天文台（SAFIR）的工程概念和实现技术
DOI：
10.1117/12.461943
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
J. Roman
中科院分区：
文献类型：
--
作者：
M. Amato;D. Benford;H. Moseley;J. Roman
“为了进一步探索光谱的这一重要部分 [30-300μm]，委员会建议使用单孔径远红外天文台 (SAFIR)。” - 新千年的天文学和天体物理学，2001 年。为了响应这一建议，我们对大型单孔径远红外望远镜（如 SAFIR）的实现技术进行了研究。制定了一份广泛的科学调查清单，并用于生成明确的科学要求清单，从中得出顶级工程要求。根据这些要求，我们根据 NGST 当前的设计开发了 SAFIR 天文台的概念设计。对生产 SAFIR 所需的变革和技术进行了详细分析。需要创新的关键技术包括轻型可部署光学器件、光学元件和仪器的低温冷却以及大型灵敏探测器阵列。无冷冻剂制冷技术对于 SAFIR 的长任务寿命是必要的，并且必须在 4K 下提供显着的 (~100mW) 冷却功率来冷却镜子，同时为探测器阵列提供非常低的温度 (~50mK)。探测器阵列需要宽波长覆盖范围、数千个连续元件以及与宽带和光谱仪器的兼容性。
"To take the next step in exploring this important part of the spectrum [30-300μm], the committee recommends the Single Aperture Far-Infrared Observatory (SAFIR)." - Astronomy and Astrophysics in the New Millennium, 2001. In response to this recommendation, we have undertaken a study of the enabling technologies for a large single aperture far-infrared telescope such as SAFIR. A broad list of science investigations was produced and used to generate an explicit list of science requirements, from which top-level engineering requirements were derived. From these requirements, we developed a conceptual design for the SAFIR observatory based on NGST's current designs. A detailed analysis has been made of the changes and technologies necessary to produce SAFIR. Crucial technologies requiring innovation include lightweight deployable optics, cryogenic cooling of optical elements and instruments, and large arrays of sensitive detectors. Cryogen-free refrigeration technologies are necessary for SAFIR's long mission lifetime, and will have to provide significant (~100mW) cooling power at 4K to cool the mirrors while providing very low temperatures (~50mK) for detector arrays. The detector arrays require wide wavelength coverage, thousands of continuum elements, and compatibility with broadband and spectroscopic instruments.