Development status of the mid-infrared two-field camera and spectrograph MIMIZUKU for the TAO 6.5-m Telescope
Development status of the mid-infrared two-field camera and spectrograph MIMIZUKU for the TAO 6.5-m Telescope
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TAO 6.5米望远镜中红外两视场相机和光谱仪MIMIZUKU的开发现状
DOI：
10.1117/12.2231565
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
T. et al.
中科院分区：
文献类型：
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作者：
Kamizuka;T. et al.
MIMIZUKU是东京大学阿塔卡马天文台(TAO)6.5米望远镜的第一代中红外仪器。MIMIZUKU在2至38μm的宽波长范围内提供成像和光谱监控功能，包括2.7-μm和30-μm等独特波段。最近，我们决定增加光谱功能，KL波段模式(λ=2.1-4.0μm；R=λ/Δλ~2 10)和2.7-μm波段模式(λ=2.4-2.95μm；R~620)，通过这次更新实现了从2.1到26μm的连续光谱覆盖。它们的光学设计已经完成，光学元件的制造正在进行中。作为最新的进展，我们还报告了低温系统和光学的完成。通过改变热连接的材料和结构更新了低温系统，光学工作台和探测器安装阶段的温度最终达到了所需的温度。倾角试验也证实了它们对仪器姿态的稳定性。在光学方面，其镀金镜已通过重新制造和改造从电偶腐蚀中恢复过来。通过常温测试，证实了系统具有足够的图像质量和稳定性。MIMIZUKU计划在今年秋天完成，斯巴鲁望远镜的调试和TAO望远镜的科学作业计划分别在2017年和2019年左右完成。本文报道了咪咪祖库的这些开发活动和未来的展望。
MIMIZUKU is the first-generation mid-infrared instrument for the university of Tokyo Atacama Observatory (TAO) 6.5-m telescope. MIMIZUKU provides imaging and spectroscopic monitoring capabilities in a wide wavelength range from 2 to 38 μm, including unique bands like 2.7-μm and 30-μm band. Recently, we decided to add spectroscopic functions, KL-band mode (λ= 2.1-4.0 μm; R =λ/Δλ ~ 210) and 2.7-μm band mode ( λ= 2.4-2.95 μm; R ~ 620), and continuous spectroscopic coverage from 2.1 to 26 μm is realized by this update. Their optical designing is completed, and fabrications of optical elements are ongoing. As recent progress, we also report the completion of the cryogenic system and optics. The cryogenic system has been updated by changing materials and structures of thermal links, and the temperatures of the optical bench and detector mounting stages finally achieved required temperatures. Their stability against instrument attitude is also confirmed through an inclination test. As for the optics, its gold-plated mirrors have been recovered from galvanic corrosion by refabrication and reconstruction. Enough image quality and stability are confirmed by room-temperature tests. MIMIZUKU is intended to be completed in this autumn, and commissioning at the Subaru telescope and scientific operations on the TAO telescope are planned in 2017 and around 2019, respectively. In this paper, these development activities and future prospects of MIMIZUKU are reported.