CAL2: Project update of the NRC Canada facility-class focal plane wavefront sensor for the Gemini Planet Imager 2 upgrade

Christian Marois*, Olivier Lardière, Joeleff Fitzsimmons, Mathieu Demers, Adam B. Johnson, Saugata Dutt, Patrick Nkwari, Benjamin Gerard, Jennifer Dunn, Duan Li, Qiang Fu, Denis Brousseau, Suresh Sivanandam, William Thompson, Christopher Mann, Garima Singh, Marc André Boucher, Tim Hardy, Krzysztof Caputa, Simon ThibaultDmitry Savransky, Wolfgang Heidrich, Maaike van Kooten, Jean Pierre Véran, Rebecca Jensen-Clem, Darryl Gamroth, Colin Bradley, Sanjana Rawat, Öykü S. Galvan, Glen Herriot, Jean Thomas Landry

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The imaging search for exoplanets is mainly limited by quasi-static speckle noise that have lifetimes between milliseconds and hours. Attempts to remove this noise using post-processing by building a point spread function (PSF) model from diversity in time, wavelength, and so-forth are limited to a small improvement due to the evolution of the noise along these same axes. The Calibration 2 (CAL2) system, being built by an international team, is a National Research Council of Canada (NRC) funded facility-class focal plane wavefront sensor for the Gemini Planet Imager 2 (GPI2) upgrade. The project consists of a complete rebuild of the GPI calibration (CAL) system. Based on the self-coherent camera concept and the FAST focal plane mask, a fraction of the near-infrared (NIR) science bandpass is extracted using a new dichroic wheel to perform focal plane wavefront sensing, with the goal to do science while also improving the contrast for the GPI2 IFS, up to a factor of 100x on bright stars. The project is at the final design review stage, and construction is expected to start summer/fall 2024, with assembly late fall 2024, and shipping to the Gemini North observatory middle of 2025.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems IX
EditorsKathryn J. Jackson, Dirk Schmidt, Elise Vernet
PublisherSPIE
ISBN (Electronic)9781510675179
DOIs
StatePublished - 2024
EventAdaptive Optics Systems IX 2024 - Yokohama, Japan
Duration: Jun 16 2024Jun 22 2024

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume13097
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAdaptive Optics Systems IX 2024
Country/TerritoryJapan
CityYokohama
Period06/16/2406/22/24

Bibliographical note

Publisher Copyright:
© 2024 SPIE.

Keywords

  • Adaptive Optics
  • Exoplanets
  • High-Contrast
  • Imaging
  • Near-Infrared
  • Nearby Stars
  • Spectroscopy

ASJC Scopus subject areas

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

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