Focal plane instruments onboard SPICA
Focal plane instruments onboard SPICA
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SPICA 上的焦平面仪器
DOI：
10.1117/12.788654
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
H. Kataza
中科院分区：
文献类型：
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作者：
H. Matsuhara;H. Kataza
SPICA是日本下一代红外太空望远镜，配备3.5 m冷却主镜，将成为中远红外领域非常独特的天文台，具有前所未有的灵敏度和空间分辨能力。在这里，我们基于其独特的设计理念，简要描述了只能通过 SPICA 实现的关键科学目标。然后，我们描述了焦平面仪器的科学要求，并总结了从航天器系统设计中得出的焦平面仪器可用的各种资源的限制。我们还概述了计划中的焦平面仪器的概念以及未来的发展计划。在焦平面仪器空间（直径2.5m，高0.5m）内，目前计划配备两种主要仪器：一种是中红外仪器，由中红外相机、中红外光谱仪和中红外日冕仪组成，另一种是远红外相机和光谱仪。中红外相机将由覆盖5-38μm、大约25-40平方弧分的四个通道组成，而中红外光谱仪将在4-18μm处具有高色散（R=30000）通道和在16-38μm处具有中色散（R=3000）通道。中红外日冕仪将同时具有5-27μm的成像和光谱能力，对比度高于10-6。对于远红外相机和光谱仪，欧洲联盟（SAFARI联盟）提出并广泛研究了覆盖30-210μm的傅里叶型成像光谱仪。美国SPICA团队也在考虑远红外和亚毫米光栅光谱仪仪器。
The SPICA, Japanese next generation infrared space telescope with a cooled 3.5 m primary mirror, will be a quite unique observatory in the mid and far-infrared with unprecedented sensitivity and the spatial resolving power. Here we briefly describe the key scientific objectives which can be performed only with SPICA, based on its unique design concepts. We then describe the scientific requirements for the focal plane instruments, and summarize the constraints on the various resources available for the focal plane instruments, derived from the spacecraft system design. We also outline the concept of the planned focal plane instruments, and the future development plan. Within the focal-plane instrument space (2.5m diameter, 0.5m height), two major instruments are so far planned to be equipped: one is a mid-infrared instrument, consisting of a mid-infrared camera, mid-infrared spectrometers, and a midinfrared coronagraph, while the another is a far-infrared camera and spectrometer. The mid-infrared camera will consist of four channels covering 5-38 μm with approximately 25-40 square arcminutes, while the mid-infrared spectrometer will have high-dispersion (R=30000) channels at 4-18 μm and moderate-dispersion (R=3000) channels at 16-38 μm. The mid-infrared coronagraph will have both imaging and spectroscopic capability at 5-27 μm, with the contrast higher than 10-6. As for the far-infrared camera and spectrometer, a Fourier-type imaging spectrometer covering 30-210 μm is proposed and extensively studied by the European consortium (SAFARI consortium). A far-infrared and sub-millimeter grating spectrometer instrument is also under consideration by the US SPICA team.