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Proceedings Article

The Gemini Planet Imager coronagraph testbed

[+] Author Affiliations
Rémi Soummer

Space Telescope Science Institute (USA) and American Museum of Natural History (USA)

Anand Sivaramakrishnan, Ben R. Oppenheimer, Robin Roberts, Douglas Brenner, Emily Griffiths, Jacob Mey

American Museum of Natural History (USA)

Alexis Carlotti

Univ. de Nice Sophia Antipolis (France)

Laurent Pueyo, Kent Wallace

Jet Propulsion Lab. (USA)

Bruce Macintosh, Brian Bauman, David Palmer

Lawrence Livermore National Lab. (USA)

Les Saddlemyer, Darren Erickson, Kris Caputa, Christian Marois

Herzberg Institute of Astrophysics, National Research Council Canada (Canada)

Christophe Dorrer

Aktiwave LLC (USA)

Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400R (August 19, 2009); doi:10.1117/12.826700
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From Conference Volume 7440

  • Techniques and Instrumentation for Detection of Exoplanets IV
  • Stuart B. Shaklan
  • San Diego, CA | August 02, 2009

abstract

The Gemini Planet Imager (GPI) is a new facility instrument to be commissioned at the 8-m Gemini South telescope in early 2011. It combines of several subsystems including a 1500 subaperture Extreme Adaptive Optics system, an Apodized Pupil Lyot Coronagraph, a near-infrared high-accuracy interferometric wavefront sensor, and an Integral Field Unit Spectrograph, which serves as the science instrument. GPI's main scientific goal is to detect and characterize relatively young (<2GYr), self luminous planets with planet-star brightness ratios of ≤ 10-7 in the near infrared. Here we present an overview of the coronagraph subsystem, which includes a pupil apodization, a hard-edged focal plane mask and a Lyot stop. We discuss designs optimization, masks fabrication and testing. We describe a near infrared testbed, which achieved broadband contrast (H-band) below 10-6 at separations > 5λ/D, without active wavefront control (no deformable mirror). We use Fresnel propagation modeling to analyze the testbed results.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Rémi Soummer ; Anand Sivaramakrishnan ; Ben R. Oppenheimer ; Robin Roberts ; Douglas Brenner, et al.
"The Gemini Planet Imager coronagraph testbed", Proc. SPIE 7440, Techniques and Instrumentation for Detection of Exoplanets IV, 74400R (August 19, 2009); doi:10.1117/12.826700; http://dx.doi.org/10.1117/12.826700


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