Ultrastable environment control for the NEID spectrometer: design and performance demonstration
Ultrastable environment control for the NEID spectrometer: design and performance demonstration
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NEID 光谱仪的超稳定环境控制：设计和性能演示
DOI：
10.1117/1.jatis.5.1.015003
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
J. Wright
中科院分区：
文献类型：
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作者：
Paul Robertson;T. Anderson;G. Stefansson;F. Hearty;A. Monson;S. Mahadevan;Scott Blakeslee;C. Bender;J. Ninan;David Conran;Eric I. Levi;Emily Lubar;A. Cole;Adam Dykhouse;S. Kanodia;Colin Nitroy;J. Smolsky;D. Tuggle;B. Blank;M. Nelson;C. Blake;S. Halverson;C. Henderson;K. Kaplan;Dan Li;S. Logsdon;M. McElwain;J. Rajagopal;L. Ramsey;Arpita Roy;C. Schwab;R. Terrien;J. Wright
抽象的。当代实验系外行星科学的两个关键重点领域是凌日类地行星的详细特征和寻找未来成像飞行任务要瞄准的类地行星。这两种追求都依赖于恒星径向速度(RV)测量的数量级改进，这对单次测量仪器的不确定度提出了10 cm / S的要求。在高分辨率光谱仪上实现如此非凡的精度需要将仪器的热机械稳定到前所未有的水平。我们介绍了NEID光谱仪的环境控制系统，该光谱仪将于2019年在基特峰国家天文台的3.5m WIYN望远镜上投入使用，其性能指标为星载RV精度<；50 cm / S。由于NeID的光学台面和支架是由铝制成的，具有高热膨胀系数，亚开尔文温度控制尤为关键。NEID继承了可居住区域行星发现者(HPF)的ECS，但对其进行了改进，提高了性能，并在室温附近操作。我们的全系统稳定性测试表明，NEID系统超过了HPF已经令人印象深刻的性能，在30天内将真空压力保持在10 − 6 Torr以下，均方根(RMS)温度稳定性好于0.4MK。我们的ECS设计是完全开源的；我们的温控真空室的设计已经公开，在这里我们发布了我们定制的温度监控系统的电气原理图。
Abstract. Two key areas of emphasis in contemporary experimental exoplanet science are the detailed characterization of transiting terrestrial planets and the search for Earth analog planets to be targeted by future imaging missions. Both of these pursuits are dependent on an order-of-magnitude improvement in the measurement of stellar radial velocities (RV), setting a requirement on single-measurement instrumental uncertainty of order 10 cm / s. Achieving such extraordinary precision on a high-resolution spectrometer requires thermomechanically stabilizing the instrument to unprecedented levels. We describe the environment control system (ECS) of the NEID spectrometer, which will be commissioned on the 3.5-m WIYN Telescope at Kitt Peak National Observatory in 2019, and has a performance specification of on-sky RV precision <50 cm / s. Because NEID’s optical table and mounts are made from aluminum, which has a high coefficient of thermal expansion, sub-milliKelvin temperature control is especially critical. NEID inherits its ECS from that of the Habitable-Zone Planet Finder (HPF), but with modifications for improved performance and operation near room temperature. Our full-system stability test shows the NEID system exceeds the already impressive performance of HPF, maintaining vacuum pressures below 10 − 6 Torr and a root mean square (RMS) temperature stability better than 0.4 mK over 30 days. Our ECS design is fully open-source; the design of our temperature-controlled vacuum chamber has already been made public, and here we release the electrical schematics for our custom temperature monitoring and control system.