The GMT-Consortium Large Earth Finder (G-CLEF): An optical Echelle spectrograph for the Giant Magellan Telescope (GMT)

Andrew Szentgyorgyi, Daniel Baldwin, Stuart Barnes, Jacob Bean, Sagi Ben-Ami, Patricia Brennan, Jamie Budynkiewicz, Moo Young Chun, Charlie Conroy, Jeffrey D. Crane, Harland Epps, Ian Evans, Janet Evans, Jeff Foster, Anna Frebel, Thomas Gauron, Dani Guzmán, Tyson Hare, Bi Ho Jang, Jeong Gyun JangAndres Jordan, Jihun Kim, Kang Miin Kim, Claudia Mendes Mendes De Oliveira, Mercedes Lopez-Morales, Kenneth McCracken, Stuart McMuldroch, Joseph Miller, Mark Mueller, Jae Sok Oh, Cem Onyuksel, Mark Ordway, Byeong Gon Park, Chan Park, Sung Joon Park, Charles Paxson, David Phillips, David Plummer, William Podgorski, Andreas Seifahrt, Daniel P Stark, Joao Steiner, Alan Uomoto, Ronald Walsworth, Young Sam Yu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

26 Scopus citations

Abstract

The GMT-Consortium Large Earth Finder (G-CLEF) will be a cross-dispersed, optical band echelle spectrograph to be delivered as the first light scientific instrument for the Giant Magellan Telescope (GMT) in 2022. G-CLEF is vacuum enclosed and fiber-fed to enable precision radial velocity (PRV) measurements, especially for the detection and characterization of low-mass exoplanets orbiting solar-type stars. The passband of G-CLEF is broad, extending from 3500Å to 9500Å. This passband provides good sensitivity at blue wavelengths for stellar abundance studies and deep red response for observations of high-redshift phenomena. The design of G-CLEF incorporates several novel technical innovations. We give an overview of the innovative features of the current design. G-CLEF will be the first PRV spectrograph to have a composite optical bench so as to exploit that material's extremely low coefficient of thermal expansion, high in-plane thermal conductivity and high stiffness-to-mass ratio. The spectrograph camera subsystem is divided into a red and a blue channel, split by a dichroic, so there are two independent refractive spectrograph cameras. The control system software is being developed in model-driven software context that has been adopted globally by the GMT. G-CLEF has been conceived and designed within a strict systems engineering framework. As a part of this process, we have developed a analytical toolset to assess the predicted performance of G-CLEF as it has evolved through design phases.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy VI
PublisherSPIE
Volume9908
ISBN (Electronic)9781510601956
DOIs
StatePublished - 2016
EventGround-Based and Airborne Instrumentation for Astronomy VI - Edinburgh, United Kingdom
Duration: Jun 26 2016Jun 30 2016

Other

OtherGround-Based and Airborne Instrumentation for Astronomy VI
CountryUnited Kingdom
CityEdinburgh
Period6/26/166/30/16

Keywords

  • Echelle spectrograph
  • ELTs
  • G-CLEF
  • GMT
  • High dispersion spectroscopy
  • Precision radial velocity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'The GMT-Consortium Large Earth Finder (G-CLEF): An optical Echelle spectrograph for the Giant Magellan Telescope (GMT)'. Together they form a unique fingerprint.

  • Cite this

    Szentgyorgyi, A., Baldwin, D., Barnes, S., Bean, J., Ben-Ami, S., Brennan, P., Budynkiewicz, J., Chun, M. Y., Conroy, C., Crane, J. D., Epps, H., Evans, I., Evans, J., Foster, J., Frebel, A., Gauron, T., Guzmán, D., Hare, T., Jang, B. H., ... Yu, Y. S. (2016). The GMT-Consortium Large Earth Finder (G-CLEF): An optical Echelle spectrograph for the Giant Magellan Telescope (GMT). In Ground-Based and Airborne Instrumentation for Astronomy VI (Vol. 9908). [990822] SPIE. https://doi.org/10.1117/12.2233506