Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21323405s&link_type=abstract
American Astronomical Society, AAS Meeting #213, #234.05; Bulletin of the American Astronomical Society, Vol. 41, p.506
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The motivation for DAVINCI was originally to make use of the technology developed for space interferometers like SIM to build a coronagraph from four 1.1m telescopes that was dramatically lower in cost than a 4 5m filled aperture offaxis coronagraph. Our initial studies through team X have shown this cost savings to be real. But a more careful analysis showed that DAVINCI would have an inner working angle of 35mas a factor of 2 smaller than a 2 lambda/D 4 meter coronagraph or 70m external occulter, resulting in a 10X increase in the number of potential Earth-Clone targets. DAVINCI uses a nulling interferometer as a coronagraph, a nulling interferometer is one the few coronagraph architectures that are compatible with segmented and dilute aperture telescopes. Combined with a post coronagraph wavefront sensor several ultra-demanding tolerances of conventional coronagraphs can be relaxed by factors of 100. The post coronagraph wavefront sensor is also much less affected by local and exozodi background than wavefront sensors that use the science camera as the wavefront sensor. The post coronagraph interferometer is also used on ground based extreme AO coronagraphs, GPI, and P1640.
No associations
LandOfFree
DAVINCI a Dilute Aperture Coronagraph does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with DAVINCI a Dilute Aperture Coronagraph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DAVINCI a Dilute Aperture Coronagraph will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1696739