28 July 2014 A preliminary design for the GMT-Consortium Large Earth Finder (G-CLEF)
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Abstract
The GMT-Consortium Large Earth Finder (G-CLEF) is an optical-band echelle spectrograph that has been selected as the first light instrument for the Giant Magellan Telescope (GMT). G-CLEF is a general-purpose, high dispersion spectrograph that is fiber fed and capable of extremely precise radial velocity measurements. The G-CLEF Concept Design (CoD) was selected in Spring 2013. Since then, G-CLEF has undergone science requirements and instrument requirements reviews and will be the subject of a preliminary design review (PDR) in March 2015. Since CoD review (CoDR), the overall G-CLEF design has evolved significantly as we have optimized the constituent designs of the major subsystems, i.e. the fiber system, the telescope interface, the calibration system and the spectrograph itself. These modifications have been made to enhance G-CLEF’s capability to address frontier science problems, as well as to respond to the evolution of the GMT itself and developments in the technical landscape. G-CLEF has been designed by applying rigorous systems engineering methodology to flow Level 1 Scientific Objectives to Level 2 Observational Requirements and thence to Level 3 and Level 4. The rigorous systems approach applied to G-CLEF establishes a well defined science requirements framework for the engineering design. By adopting this formalism, we may flexibly update and analyze the capability of G-CLEF to respond to new scientific discoveries as we move toward first light. G-CLEF will exploit numerous technological advances and features of the GMT itself to deliver an efficient, high performance instrument, e.g. exploiting the adaptive optics secondary system to increase both throughput and radial velocity measurement precision.
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Andrew Szentgyorgyi, Andrew Szentgyorgyi, Stuart Barnes, Stuart Barnes, Jacob Bean, Jacob Bean, Bruce Bigelow, Bruce Bigelow, Antonin Bouchez, Antonin Bouchez, Moo-Young Chun, Moo-Young Chun, Jeffrey D. Crane, Jeffrey D. Crane, Harland Epps, Harland Epps, Ian Evans, Ian Evans, Janet Evans, Janet Evans, Anna Frebel, Anna Frebel, Gabor Furesz, Gabor Furesz, Alex Glenday, Alex Glenday, Dani Guzman, Dani Guzman, Tyson Hare, Tyson Hare, Bi-Ho Jang, Bi-Ho Jang, Jeong-Gyun Jang, Jeong-Gyun Jang, Ueejong Jeong, Ueejong Jeong, Andres Jordan, Andres Jordan, Kang-Min Kim, Kang-Min Kim, Jihun Kim, Jihun Kim, Chih-Hao Li, Chih-Hao Li, Mercedes Lopez-Morales, Mercedes Lopez-Morales, Kenneth McCracken, Kenneth McCracken, Brian McLeod, Brian McLeod, Mark Mueller, Mark Mueller, Jakyung Nah, Jakyung Nah, Timothy Norton, Timothy Norton, Heeyoung Oh, Heeyoung Oh, Jae Sok Oh, Jae Sok Oh, Mark Ordway, Mark Ordway, Byeong-Gon Park, Byeong-Gon Park, Chan Park, Chan Park, Sung-Joon Park, Sung-Joon Park, David Phillips, David Phillips, David Plummer, David Plummer, William Podgorski, William Podgorski, Florian Rodler, Florian Rodler, Andreas Seifahrt, Andreas Seifahrt, Kyung-Mo Tak, Kyung-Mo Tak, Alan Uomoto, Alan Uomoto, Marcos A. Van Dam, Marcos A. Van Dam, Ronald Walsworth, Ronald Walsworth, Young Sam Yu, Young Sam Yu, In-Soo Yuk, In-Soo Yuk, } "A preliminary design for the GMT-Consortium Large Earth Finder (G-CLEF)", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914726 (28 July 2014); doi: 10.1117/12.2056741; https://doi.org/10.1117/12.2056741
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