LAPCAT: The Large Antarctic Plateau Clear-Aperture Telescope

John Storey, J Roger P Angel, Jon Lawrence, Philip M Hinz, Michael Ashley, Michael Burton

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

6 Citations (Scopus)

Abstract

We present a proposal for an 8.4 metre off-axis optical/IR telescope to be located at Dome C, Antarctica. LAPCAT will use a mirror identical to the offset segment recently cast for the Giant Magellan Telescope (GMT) as a completely unobscured f/2.1 primary. With a cooled deformable Gregorian secondary in a dewar following prime focus, LAPCAT will allow for diffraction-limited imaging with only a single reflecting surface at ∼ 220K, and thus the lowest possible thermal background obtainable on earth. The exceptionally low atmospheric turbulence above Dome C enables very high contrast imaging in the thermal infrared, and diffraction limited imaging extending to optical wavelengths (20 mas at 800 nm, where Strehl ratios > 60% are projected). As an example, a deep 5 μm exoplanet imaging survey to complement current radial velocity methods could take advantage of both the low background and pupil remapping methods for apodization enabled by the clear aperture. Many new, young, giant planets (≥ 3Mj at 1 Gyr) would be detected in orbits ≥ 5 AU out to 20 pc. By providing a test bed for many of the GMT technologies in an Antarctic environment, LAPCAT also paves the way for the eventual construction of a second GMT at Dome C. Such a telescope would have unparalleled capabilities compared both to other ELTs in temperate sites and to JWST.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6267 I
DOIs
StatePublished - 2006
EventGround-based and Airborne Telescopes - Orlando, FL, United States
Duration: May 24 2006May 31 2006

Other

OtherGround-based and Airborne Telescopes
CountryUnited States
CityOrlando, FL
Period5/24/065/31/06

Fingerprint

Telescopes
plateaus
apertures
telescopes
Domes
domes
Imaging techniques
ice environments
Diffraction
low turbulence
Dewars
James Webb Space Telescope
apodization
Atmospheric turbulence
test stands
atmospheric turbulence
Antarctic regions
Planets
extrasolar planets
pupils

Keywords

  • Adaptive optics
  • Antarctica
  • Exoplanets
  • Infrared
  • Off-axis
  • Telescopes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Storey, J., Angel, J. R. P., Lawrence, J., Hinz, P. M., Ashley, M., & Burton, M. (2006). LAPCAT: The Large Antarctic Plateau Clear-Aperture Telescope. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6267 I). [62671E] https://doi.org/10.1117/12.672159

LAPCAT : The Large Antarctic Plateau Clear-Aperture Telescope. / Storey, John; Angel, J Roger P; Lawrence, Jon; Hinz, Philip M; Ashley, Michael; Burton, Michael.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6267 I 2006. 62671E.

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

Storey, J, Angel, JRP, Lawrence, J, Hinz, PM, Ashley, M & Burton, M 2006, LAPCAT: The Large Antarctic Plateau Clear-Aperture Telescope. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6267 I, 62671E, Ground-based and Airborne Telescopes, Orlando, FL, United States, 5/24/06. https://doi.org/10.1117/12.672159
Storey J, Angel JRP, Lawrence J, Hinz PM, Ashley M, Burton M. LAPCAT: The Large Antarctic Plateau Clear-Aperture Telescope. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6267 I. 2006. 62671E https://doi.org/10.1117/12.672159
Storey, John ; Angel, J Roger P ; Lawrence, Jon ; Hinz, Philip M ; Ashley, Michael ; Burton, Michael. / LAPCAT : The Large Antarctic Plateau Clear-Aperture Telescope. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6267 I 2006.
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