TPF Coronagraph and Interferometer Approaches -- A Current View of Their Comparative Technology Challenges

Details TPF Coronagraph and Interferometer Approaches -- A Current View of Their Comparative Technology Challenges TPF Coronagraph and Interferometer Approaches -- A Current View of Their Comparative Technology Challenges

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.1902k&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #19.02; Bulletin of the American Astronomical Society, Vol. 34, p.1132

Physics

Optics

Scientific paper

The next few years will see development of Terrestrial Planet Finder (TPF) technology elements, preparatory to selecting either an infrared interferometer or a visible-light coronagraph for the TPF operational concept. For it to detect and characterize extrasolar planets TPF must suppress the effects of direct light from a planet's star. Key TPF performance parameters include inner working angle, required integration time, and spectral range, both for initial searches of nearby potential planetary systems and for subsequent detection of identified planets' spectral features. Critical TPF technology capabilities include optics and wavefront control needed for adequate nulling or coronagraphic starlight-suppression, large-optics manufacturability, uniformity of optical coatings, thermal and vibrational disturbance control, attitude control, system testability on the ground and validation with space precursors, and deployment and operational reliability beyond Earth orbit. We present here our views of the current status of technologies and their potential improvements over the time frame projected for developing an eventual flight system capable of performing the full TPF mission.

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