Transcript The Installation & Characterization of the Coronagraphic

The Installation & Characterization of the Coronagraphic Upgrade to
the Extreme Adaptive Optics Test Bed
Darrius Robinson
Extra Solar Planets
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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
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
Intensity
Star Vs YJP
YJP
Star
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
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Camera Plane
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H
Focal Plane
Pupil Plane
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Coronagraph Input & Lyot Stop
Various Lyot Stop Sizes
5 Pixels
10 Pixels
25 Pixels
30 Pixels
15 Pixels
35 Pixels
20 Pixels
40 Pixels
Simulated VS Actual
Contrast Plot with Cat’s Eye (Pre Coronagraph)
Intensity
Contrast Plot with & without Coronagraph Input
Distance From Center (λ/D)
Acknowledgements
Scott Severson
Katie M
Darren Dillon
Don Gavel