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Darrius Robinson

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

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Darrius Robinson

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

  2. 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

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

  4. 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

  5. Coronagraphs

  6. Visible VS Infrared

  7. Ultimate Goal

  8. 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

  9. Current Adaptive Optics Testbed Setup

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

  11. Coronagraph Input & Lyot Stop

  12. 25 Pixels 30 Pixels Various Lyot Stop Sizes 5 Pixels 10 Pixels 15 Pixels 20 Pixels 35 Pixels 40 Pixels

  13. Simulated VS Actual

  14. Contrast Plot with Cat’s Eye (Pre Coronagraph)

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

  16. Acknowledgements Scott Severson Darren Dillon Don Gavel Katie M

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