Development and status of MAPS, the MMT AO exoPlanet characterization system
Development and status of MAPS, the MMT AO exoPlanet characterization system
复制标题
MAPS（MMT AO 系外行星表征系统）的发展和现状
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
B. Jannuzi
中科院分区：
文献类型：
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作者：
K. Morzinski;M. Montoya;C. Fellows;O. Durney;J. Ford;G. West;Andrew Gardner;A. Vaz;N. Anugu;Emily A. Mailhot;Jared Carlson;L. Harrison;Frank Gacon;E. Downey;P. Hinz;T. Jones;J. Patience;S. Sivanandam;Shaojie Chen;M. Lamb;A. Butko;Siqi Liu;T. Hardy;B. Jannuzi
我们正在升级和翻新亚利桑那州6.5米MMT上基于自适应次镜（ASM）的第一代AO系统，这是NSF MSIP资助的项目，将创建一个专门用于系外行星表征的独特设施。此次更新包括第三代ASM，其嵌入式电子器件可实现低功耗，两个金字塔波前传感器（光学和近红外），以及用于1-5 μm高分辨率光谱（HRS）的升级ARIES科学相机和用于敏感偏振映射的MMT-POL科学相机。336个执行器中的每一个都集成了数字电子设备，简化了集线器级电子设备，并将总功率从传统系统的1800 W降至300 W-将冷却要求从主动冷却降低到被动环境冷却。改进的内部控制律允许电子阻尼和更快的响应。双金字塔波前传感器允许根据引导星星的大小、颜色和消光在光学或IR波前感测之间进行选择。HRS升级为ARIES，使分子模板的互相关能够提取系外行星的大气参数。这些升级的结合创造了一个通过AO和HRS进行系外行星表征的主力仪器，以将行星与其宿主恒星分离，具有宽波长覆盖范围和偏振，以探测系外行星大气中的一系列分子物种。
We are upgrading and refurbishing the first-generation adaptive-secondary mirror (ASM)-based AO system on the 6.5-m MMT in Arizona, in an NSF MSIP-funded program that will create a unique facility specialized for exoplanet characterization. This update includes a third-generation ASM with embedded electronics for low power consumption, two pyramid wavefront sensors (optical and near-IR), and an upgraded ARIES science camera for high-resolution spectroscopy (HRS) from 1-5 μm and MMT-POL science camera for sensitive polarization mapping. Digital electronics have been incorporated into each of the 336 actuators, simplifying hub-level electronics and reducing the total power to 300 W, down from 1800 W in the legacy system — reducing cooling requirements from active coolant to passive ambient cooling. An improved internal control law allows for electronic damping and a faster response. The dual pyramid wavefront sensors allow for a choice between optical or IR wavefront sensing depending on guide star magnitude, color, and extinction. The HRS upgrade to ARIES enables crosscorrelation of molecular templates to extract atmospheric parameters of exoplanets. The combination of these upgrades creates a workhorse instrument for exoplanet characterization via AO and HRS to separate planets from their host stars, with broad wavelength coverage and polarization to probe a range of molecular species in exoplanet atmospheres.
升级版MMT自适应副镜的实验室测试和标定
DOI：
10.1117/12.2576352
发表时间：
2020
期刊：
Proceedings of the SPIE
影响因子：
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作者：
Vaz, Amali;Morzinski, Katie M.;Montoya, Manny;Fellows, Chuck;Ford, John;Gardner, Andrew;Durney, Olivier;West, Grant;Harrison, Lori;Gacon, Frank
通讯作者：
Gacon, Frank