The Installation & Characterization of the Coronagraphic Upgrade to the Extreme Adaptive Optics Test Bed Darrius Robinson.

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Presentation transcript:

The Installation & Characterization of the Coronagraphic Upgrade to the Extreme Adaptive Optics Test Bed Darrius Robinson

Extra Solar Planets Orbit stars other than the sun Belong of planetary system As of Aug 2006, over 200 known exo-planets First published detection in 1988 Referred to as Young Jupiter Planets STAR

Current Methods Of Detection Astrometry Radial Velocity Pulsar Timing Transit Method Gravitational micro-lensing Circumstellar disks

Current Problem: Direct Imaging Technique Lack of consistent Direct Imaging Detection Technique Light from stars prevent us from viewing planets Large contrast difference between stars and planets

Coronagraphs

Visible VS Infrared

Ultimate Goal

My Contribution Measuring & Cutting Optical Fiber Cables Installation of Components on LAO Testbed Adding Shifts to IDL Code Adding of Various Apertures to Code Actual Testing & Collection of Data

Current Adaptive Optics Testbed Setup

Light & Diffraction Suppression Pupil Plane Focal Plane P O S T - C R N A G H P R E - C O N A G H Camera Plane Pupil Plane

Coronagraph Input & Lyot Stop

Various Lyot Stop Sizes 5 Pixels 10 Pixels 15 Pixels 20 Pixels 25 Pixels 30 Pixels 35 Pixels 40 Pixels

Simulated VS Actual

Contrast Plot with Cat’s Eye (Pre Coronagraph)

Contrast Plot with & without Coronagraph Input Intensity Distance From Center (λ/D)

Acknowledgements Scott Severson Darren Dillon Don Gavel Katie M

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