darrius robinson
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
Darrius Robinson
The Installation & Characterization of the Coronagraphic Upgrade to the Extreme Adaptive
Optics Test Bed
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
Astrometry
Current Methods Of Detection
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
Star Vs YJ P
Intensity
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
Actual Testing & Collection of Data
Adding of Various Apertures to Code
Current Adaptive Optics Testbed Setup
Light & Diffraction Suppression
Pupil Plane
Camera Plane
Focal Plane
Pupil Plane
PRE -CORONAGRPAH
POST -CORONAGRPAH
Coronagraph Input & Lyot Stop
Various Lyot Stop Sizes
5 Pixels
10 Pixels
15 Pixels
20 Pixels
35 Pixels
40 Pixels
25 Pixels
30 Pixels
Simulated VS Actual
Contrast Plot with Cat’s Eye (Pre Coronagraph)
Inte
nsity
Distance From Center (λ/D)
Contrast Plot with & without Coronagraph Input
Acknowledgements
Darren Dillon Don Gavel
Katie M
Scott Severson