The diffractive interfero coronagraph exoplanet resolver (DICER)

Heidi Jo Newberg; Leaf A. Swordy; Thomas D. Ditto; Richard K. Barry; L. Drake Deming; Frank Ravizza

doi:10.1117/12.2678557

5 October 2023 The diffractive interfero coronagraph exoplanet resolver (DICER)

Heidi Jo Newberg, Leaf A. Swordy, Thomas D. Ditto, Richard K. Barry, L. Drake Deming, Frank Ravizza

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 126802K (2023) https://doi.org/10.1117/12.2678557
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

Diffractive Interfero Coronagraph Exoplanet Resolver (DICER) is a notional infrared space observatory that would detect all habitable exoplanets within 10 pc of the Sun and determine whether there is ozone in their atmospheres. We are aiming at an approximate $1B target cost for a several year mission, and an observatory that easily fits in a Falcon heavy launch vehicle. Light (near 10 microns) is collected with two flat diffraction gratings that are each 10 meters long. Each grating feeds light into smaller focusing secondary optics that are 1 meter across. An achromatic interferometer (Dispersion Leverage Coronagraph, DLC) reduces the light from the host star by a factor of at least 10⁵. A second high resolution spectrograph separates exoplanet light from the background. The one-dimensional diffraction limit of this system (0.1") is sufficient to resolve an Earth-like planet orbiting a Sun-like star at a distance of 10 pc. The gratings can be tilted to scan through a small range of wavelengths around 10 microns so that the ozone absorption line can be detected.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Heidi Jo Newberg, Leaf A. Swordy, Thomas D. Ditto, Richard K. Barry, L. Drake Deming, and Frank Ravizza "The diffractive interfero coronagraph exoplanet resolver (DICER)", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 126802K (5 October 2023); https://doi.org/10.1117/12.2678557

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