Error budgets for the Exoplanet Starshade (Exo-S) probe-class mission study

Shaklan, Stuart; Marchen, Luis; Cady, Eric; Ames, William E.; Lisman, P. Douglas; Martin, Stefan; Thomson, Mark; Regehr, M. W.

doi:10.1117/12.2190384

Cited by 15 publications

(19 citation statements)

References 5 publications

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“…To reduce reflected glint, the optical edges must achieve razor sharpness, with an edge radius of curvature ≤1 μm. 31 The edges must also maintain a precision shape when deployed, and remain optically dark, with low reflectivity. Machined graphite and chemically etched metal edges are both close to meeting the necessary performance, with the former lacking a small enough edge radius and the latter lacking the deployed shape tolerance.…”

Section: Optical Edgesmentioning

confidence: 99%

Technology gap assessment for a future large-aperture ultraviolet-optical-infrared space telescope

Bolcar

Balasubramanian

Crooke

et al. 2016

J. Astron. Telesc. Instrum. Syst

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The Advanced Technology Large Aperture Space Telescope (ATLAST) team identified five key technology areas to enable candidate architectures for a future large-aperture ultraviolet/optical/ infrared (LUVOIR) space observatory envisioned by the NASA Astrophysics 30-year roadmap, "Enduring Quests, Daring Visions." The science goals of ATLAST address a broad range of astrophysical questions from early galaxy and star formation to the processes that contributed to the formation of life on Earth, combining general astrophysics with direct-imaging and spectroscopy of habitable exoplanets. The key technology areas are internal coronagraphs, starshades (or external occulters), ultra-stable large-aperture telescope systems, detectors, and mirror coatings. For each technology area, we define best estimates of required capabilities, current state-of-the-art performance, and current technology readiness level (TRL), thus identifying the current technology gap. We also report on current, planned, or recommended efforts to develop each technology to TRL 5.

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Section: Optical Edgesmentioning

confidence: 99%

Technology gap assessment for a future large-aperture ultraviolet-optical-infrared space telescope

Bolcar

Balasubramanian

Crooke

et al. 2016

J. Astron. Telesc. Instrum. Syst

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“…Even at a distance of tens of thousands of kilometers, solar glint from the metallic, razor-sharp edges is the brightest source of instrument background. 15 For the SRM starshade, roughly 130 m of edge contributes to the glint, of which ∼10 m has a strong specular component that samples the region θ ∼ 0 in Figs. 4 and 8.…”

Section: Modeling Solar Glint Lobesmentioning

confidence: 94%

“…In fact, it is several times larger than any other instrument-related background contributor including stellar diffraction due to starshade shape errors, stellar and solar leakage through micrometeoroid holes in the optical shield, and reflection of the Milky Way and other astrophysical objects from the telescope-facing surface. 15 The SRM's focus on the closest stars, with planets appearing well beyond the IWA, gives ample habitable zone access with minimal interference from the glint lobes. Nonetheless, it is desirable to significantly reduce solar glint to provide the best possible SNR.…”

Section: Mission Performance Assessmentmentioning

confidence: 99%

Solar glint from uncoated starshade optical edges

Shaklan

Hilgemann

McKeithen

et al. 2021

J. Astron. Telesc. Instrum. Syst.

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“…To be a viable starshade occulter, it must fit within the launch vehicle and achieve positioning accuracy of ≤20 cm [60]. The starshade must have low scattering at its edges, so as to not generate stray light problems, creating the requirement that the edge radius of curvature (RoC) should be ≤10 μm [64] and an edge specular reflectivity ≤10%.…”

Section: Uv/optical/ir Sciencementioning

confidence: 99%

Optics technology for large-aperture space telescopes: from fabrication to final acceptance tests

et al. 2018

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This review paper addresses topics of fabrication, testing, alignment, and as-built performance of reflective space optics for the next generation of telescopes across the x-ray to far-infrared spectrum. The technology presented in the manuscript represents the most promising methods to enable a next level of astronomical observation capabilities for space-based telescopes as motivated by the science community. While the technology to produce the proposed telescopes does not exist in its final form, the optics industry is making steady and impressive progress toward these goals across all disciplines. We hope that through sharing these developments in context of the science objectives, further connections and improvements are enabled to push the envelope of the technology.

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Error budgets for the Exoplanet Starshade (Exo-S) probe-class mission study

Cited by 15 publications

References 5 publications

Technology gap assessment for a future large-aperture ultraviolet-optical-infrared space telescope

Technology gap assessment for a future large-aperture ultraviolet-optical-infrared space telescope

Solar glint from uncoated starshade optical edges

Optics technology for large-aperture space telescopes: from fabrication to final acceptance tests

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