Abstract
Coronagraph technology is advancing and promises to enable space telescopes capable of directly detecting low surface brightness circumstellar debris disks as well as giant planets as close as in the habitable zones of their host stars. One mission capable of doing this is called EXCEDE (EXoplanetary Circumstellar Environments and Disk Explorer), which in 2011 was selected by NASA's Explorer program for technology development (Category III). EXCEDE is a 0.7m space telescope concept designed to achieve raw contrasts of 10 -6 at an inner working angle of 1.2 λ/D and 10-7 at 2 λ/D and beyond. In addition to doing fundamental science on debris disks, EXCEDE will also serve as a technological and scientific precursor for an exo-Earth imaging mission. EXCEDE uses a Starlight Suppression System (SSS) based on the Phase Induced Amplitude Apodization (PIAA) coronagraph to provide high throughput and high contrast close to the diffraction limit, enabling aggressive performance. We report on our continuing progress of developing the SSS for EXCEDE, including (a) high contrast performance demonstrations at 1.2 λ/D, which includes a lab demonstration of 2×10-7 median contrast between 1.2 and 2.0 λ/D simultaneously with 6.5×10 -8 median contrast between 2 and 4 λ/D in monochromatic light at 655nm, meeting a major milestone in our technology development program; (b) the installation of a new Low Order Wavefront Sensor (LOWFS) which enabled achieving deep contrasts at aggressive inner working angles; (c) implementation of more efficient model-based wavefront control algorithms; and (d) a preliminary broadband contrast result of 6×10-6 contrast at 1.2 λ/D in a 10% band.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 8864 |
| DOIs | |
| State | Published - 2013 |
| Event | Techniques and Instrumentation for Detection of Exoplanets VI - San Diego, CA, United States Duration: Aug 26 2013 → Aug 29 2013 |
Other
| Other | Techniques and Instrumentation for Detection of Exoplanets VI |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 8/26/13 → 8/29/13 |
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Keywords
- Coronagraph
- Debris disk
- Direct imaging
- EXCEDE
- Exoplanets
- Explorer
- High contrast
- IWA
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
EXCEDE Technology Development II : Demonstration of High Contrast at 1.2 λ/D and Preliminary Broadband Results. / Belikov, Ruslan; Bendek, Eduardo; Greene, Thomas P.; Guyon, Olivier; Lozi, Julien; Lynch, Dana H.; Newman, Kevin E.; Pluzhnik, Eugene; Schneider, Glenn; Tenerelli, Domenick; Thomas, Sandrine J.; Witteborn, Fred C.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8864 2013. 88640W.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - EXCEDE Technology Development II
T2 - Demonstration of High Contrast at 1.2 λ/D and Preliminary Broadband Results.
AU - Belikov, Ruslan
AU - Bendek, Eduardo
AU - Greene, Thomas P.
AU - Guyon, Olivier
AU - Lozi, Julien
AU - Lynch, Dana H.
AU - Newman, Kevin E.
AU - Pluzhnik, Eugene
AU - Schneider, Glenn
AU - Tenerelli, Domenick
AU - Thomas, Sandrine J.
AU - Witteborn, Fred C.
PY - 2013
Y1 - 2013
N2 - Coronagraph technology is advancing and promises to enable space telescopes capable of directly detecting low surface brightness circumstellar debris disks as well as giant planets as close as in the habitable zones of their host stars. One mission capable of doing this is called EXCEDE (EXoplanetary Circumstellar Environments and Disk Explorer), which in 2011 was selected by NASA's Explorer program for technology development (Category III). EXCEDE is a 0.7m space telescope concept designed to achieve raw contrasts of 10 -6 at an inner working angle of 1.2 λ/D and 10-7 at 2 λ/D and beyond. In addition to doing fundamental science on debris disks, EXCEDE will also serve as a technological and scientific precursor for an exo-Earth imaging mission. EXCEDE uses a Starlight Suppression System (SSS) based on the Phase Induced Amplitude Apodization (PIAA) coronagraph to provide high throughput and high contrast close to the diffraction limit, enabling aggressive performance. We report on our continuing progress of developing the SSS for EXCEDE, including (a) high contrast performance demonstrations at 1.2 λ/D, which includes a lab demonstration of 2×10-7 median contrast between 1.2 and 2.0 λ/D simultaneously with 6.5×10 -8 median contrast between 2 and 4 λ/D in monochromatic light at 655nm, meeting a major milestone in our technology development program; (b) the installation of a new Low Order Wavefront Sensor (LOWFS) which enabled achieving deep contrasts at aggressive inner working angles; (c) implementation of more efficient model-based wavefront control algorithms; and (d) a preliminary broadband contrast result of 6×10-6 contrast at 1.2 λ/D in a 10% band.
AB - Coronagraph technology is advancing and promises to enable space telescopes capable of directly detecting low surface brightness circumstellar debris disks as well as giant planets as close as in the habitable zones of their host stars. One mission capable of doing this is called EXCEDE (EXoplanetary Circumstellar Environments and Disk Explorer), which in 2011 was selected by NASA's Explorer program for technology development (Category III). EXCEDE is a 0.7m space telescope concept designed to achieve raw contrasts of 10 -6 at an inner working angle of 1.2 λ/D and 10-7 at 2 λ/D and beyond. In addition to doing fundamental science on debris disks, EXCEDE will also serve as a technological and scientific precursor for an exo-Earth imaging mission. EXCEDE uses a Starlight Suppression System (SSS) based on the Phase Induced Amplitude Apodization (PIAA) coronagraph to provide high throughput and high contrast close to the diffraction limit, enabling aggressive performance. We report on our continuing progress of developing the SSS for EXCEDE, including (a) high contrast performance demonstrations at 1.2 λ/D, which includes a lab demonstration of 2×10-7 median contrast between 1.2 and 2.0 λ/D simultaneously with 6.5×10 -8 median contrast between 2 and 4 λ/D in monochromatic light at 655nm, meeting a major milestone in our technology development program; (b) the installation of a new Low Order Wavefront Sensor (LOWFS) which enabled achieving deep contrasts at aggressive inner working angles; (c) implementation of more efficient model-based wavefront control algorithms; and (d) a preliminary broadband contrast result of 6×10-6 contrast at 1.2 λ/D in a 10% band.
KW - Coronagraph
KW - Debris disk
KW - Direct imaging
KW - EXCEDE
KW - Exoplanets
KW - Explorer
KW - High contrast
KW - IWA
UR - http://www.scopus.com/inward/record.url?scp=84888988367&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84888988367&partnerID=8YFLogxK
U2 - 10.1117/12.2024569
DO - 10.1117/12.2024569
M3 - Conference contribution
SN - 9780819497147
VL - 8864
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -