The iLocater cryostat and thermal control system: enabling extremely precise radial velocity measurements for diffraction-limited spectrographs
The iLocater cryostat and thermal control system: enabling extremely precise radial velocity measurements for diffraction-limited spectrographs
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iLocater 低温恒温器和热控制系统:为衍射极限光谱仪提供极其精确的径向速度测量
DOI:
10.1117/12.2630199
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Fantano, Louis G.
中科院分区:
文献类型:
--
作者:
Crass, Jonathan;Sadagopan, Nandini;Misch, Matthew;Rizika, Alexa;Sands, Brian;Engstrom, Matthew;Crepp, Justin R.;Smous, James;Chilcote, Jeffrey;Fantano, Louis G.
Extremely precise radial velocity (EPRV) measurements are critical for characterizing nearby terrestrial worlds. EPRV instrument precisions of σRV = 1−10 cm/s are required to study Earth-analog systems, imposing stringent, sub-mK, thermo-mechanical stability requirements on Doppler spectrograph designs. iLocater is a new, high resolution (R = 190, 500 median) near infrared (NIR) EPRV spectrograph under construction for the dual 8.4 m diameter Large Binocular Telescope (LBT). The instrument is one of the first to operate in the diffraction-limited regime enabled by the use of adaptive optics and single-mode fibers. This facilitates affordable optomechanical fabrication of the spectrograph using intrinsically stable materials. We present the final design and performance of the iLocater cryostat and thermal control system which houses the instrument spectrograph. The spectrograph is situated inside an actively temperature-controlled radiation shield mounted inside a multi-layer-insulation (MLI) lined vacuum chamber. The radiation shield provides sub-mK thermal stability, building on the existing heritage of the Habitable-zone Planet Finder (HPF) and NEID instruments. The instrument operating temperature (T = 80−100 K) is driven by the requirement to minimize detector background and instantaneous coefficient of thermal expansion (CTE) of the materials used for spectrograph fabrication. This combination allows for a reduced thermomechanical impact on measurement precision, improving the scientific capabilities of the instrument.
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影响因子:
0.2
作者:
J. Crass;L. Fantano;F. Hearty;J. Crepp;M. Nelson;S. Wall;D. Cavalieri;C. Koca;D. King;R. Reynolds;K. Stapelfeldt
通讯作者:
K. Stapelfeldt
DOI:
10.1117/1.jatis.5.1.015003
发表时间:
2019
期刊:
Journal of Astronomical Telescopes, Instruments, and Systems
影响因子:
--
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
通讯作者:
J. Wright
DOI:
10.1007/978-3-662-53120-4_300233
发表时间:
2019
期刊:
CIRP Encyclopedia of Production Engineering
影响因子:
--
作者:
J. Crass;L. Fantano;F. Hearty;J. Crepp;M. Nelson;S. Wall;D. Cavalieri;C. Koca;D. King;R. Reynolds;K. Stapelfeldt
通讯作者:
K. Stapelfeldt
DOI:
10.48550/arxiv.2107.14291
发表时间:
2021
期刊:
arXiv e-prints
影响因子:
--
作者:
Crass Jonathan
通讯作者:
Crass Jonathan