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Method for Deriving Telescope Specifications for Earth-Detecting Coronagraphs and Its Use in Prioritizing Technology Development Investments
Different potential exoplanet mission concepts require different enabling and enhancing technologies. Decisions regarding prioritizing the development of these technologies can be made using a Science-Driven Systems-Engineering framework. The white paper makes the following specific recommendations. (1) Any potential telescope/coronagraph combination should develop a wavefront stability error budget using the method described in this white paper. That error budget will inform discussions about what technology development will be needed to enable the mission. (2) Enhancing and enabling technologies requiring investment include: low noise reaction wheels or control moment gyros; micro-thruster technology; active vibration isolation; materials and design practice for making lightweight stiff structures and optical components; 200-hertz wavefront sensing and control; 500-hertz sub-picometer-precision edge sensor and position actuators; non-destructive process to quantify CTE (Coefficient of Thermal Expansion) homogeneity of 4-meter class mirrors to an uncertainty of plus or minus 1 parts per billion per degree Kelvin over a 100 by 100 sampling; laser gauge positional metrology system; and predictive active thermal control.
Coronagraph Science Studies by the WFIRST Preparatory Science Teams
No abstract available
Theoretical Performance Limits for Coronagraphs on Obstructed and Unobstructed Apertures: How Much Can Current Designs Be Improved?
No abstract available
The Effect of Radiation-Induced Traps on the WFIRST Coronagraph Detectors
No abstract available
WFIRST Coronagraph Starlight Suppression Technology Progress
No abstract available
Phase Retrieval Implementation for the WFIRST Coronagraph Development Testbed
No abstract available
Milestone 7: EMCCD status - WFIRST Coronagraph Stanford Meeting No. 9
No abstract available
Deriving Telescope Wavefront Error (WFE) Stability Error Budget from Coronagraph Performance
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Performance and Sensitivity of PIAA Coronagraphs for Future Segmented Space Telescopes
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Coronagraphic Observations of the Lunar Sodium Exosphere January - June, 2017
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High contrast imaging testbed for the Terrestrial Planet Finder Coronagraph
. . .viability. This paper describes the current testbed design and preliminary experimental results.