Demonstration of broadband contrast at 1.2 λ / D and greater for the EXCEDE starlight suppression system

Dan Sirbu, Sandrine J. Thomas, Ruslan Belikov, Julien Lozi, Eduardo Bendek, Eugene Pluzhnik, Dana H. Lynch, Troy Hix, Peter Zell, Olivier Guyon, Glenn Schneider

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE) science mission concept uses a visible-wavelength phase-induced amplitude apodization (PIAA) coronagraph to enable high-contrast imaging of circumstellar debris systems and some giant planets at angular separations reaching into the habitable zones of some of the nearest stars. We report on the experimental results obtained in the vacuum chamber at the Lockheed Martin Advanced Technology Center in 10% broadband light centered about 650 nm, with a median contrast of 1×10-5 between 1.2 and 2.0λ/D simultaneously with 3×10-7 contrast between 2 and 11λ/D for a single-sided dark hole using a deformable mirror (DM) upstream of the PIAA coronagraph. These results are stable and repeatable as demonstrated by three measurement runs with DM settings set from scratch and maintained on the best 90% out of the 1000 collected frames. We compare the reduced experimental data with simulation results from modeling observed experimental limits. The observed performance is consistent with uncorrected low-order modes not estimated by the low-order wavefront sensor. Modeled sensitivity to bandwidth and residual tip/tilt modes is well matched to the experiment.

Original languageEnglish (US)
Article number025002
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Volume2
Issue number2
DOIs
StatePublished - Apr 1 2016

Fingerprint

apodization
Mirrors
Demonstrations
coronagraphs
deformable mirrors
retarding
broadband
advanced technology
Planets
Wavefronts
Debris
tilt
Stars
planet
Vacuum
vacuum chambers
sensor
wavelength
Bandwidth
Imaging techniques

Keywords

  • Broadband
  • Circumstellar debris systems
  • Coronagraph
  • EXoplanetary Circumstellar Environments and Disk Explorer
  • Exoplanets
  • High-contrast imaging
  • Inner working angle
  • Phase-induced amplitude apodization

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science

Cite this

Demonstration of broadband contrast at 1.2 λ / D and greater for the EXCEDE starlight suppression system. / Sirbu, Dan; Thomas, Sandrine J.; Belikov, Ruslan; Lozi, Julien; Bendek, Eduardo; Pluzhnik, Eugene; Lynch, Dana H.; Hix, Troy; Zell, Peter; Guyon, Olivier; Schneider, Glenn.

In: Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 2, No. 2, 025002, 01.04.2016.

Research output: Contribution to journalArticle

Sirbu, Dan ; Thomas, Sandrine J. ; Belikov, Ruslan ; Lozi, Julien ; Bendek, Eduardo ; Pluzhnik, Eugene ; Lynch, Dana H. ; Hix, Troy ; Zell, Peter ; Guyon, Olivier ; Schneider, Glenn. / Demonstration of broadband contrast at 1.2 λ / D and greater for the EXCEDE starlight suppression system. In: Journal of Astronomical Telescopes, Instruments, and Systems. 2016 ; Vol. 2, No. 2.
@article{0ed0c412e7ae48ba85ddabe2561a3f68,
title = "Demonstration of broadband contrast at 1.2 λ / D and greater for the EXCEDE starlight suppression system",
abstract = "The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE) science mission concept uses a visible-wavelength phase-induced amplitude apodization (PIAA) coronagraph to enable high-contrast imaging of circumstellar debris systems and some giant planets at angular separations reaching into the habitable zones of some of the nearest stars. We report on the experimental results obtained in the vacuum chamber at the Lockheed Martin Advanced Technology Center in 10{\%} broadband light centered about 650 nm, with a median contrast of 1×10-5 between 1.2 and 2.0λ/D simultaneously with 3×10-7 contrast between 2 and 11λ/D for a single-sided dark hole using a deformable mirror (DM) upstream of the PIAA coronagraph. These results are stable and repeatable as demonstrated by three measurement runs with DM settings set from scratch and maintained on the best 90{\%} out of the 1000 collected frames. We compare the reduced experimental data with simulation results from modeling observed experimental limits. The observed performance is consistent with uncorrected low-order modes not estimated by the low-order wavefront sensor. Modeled sensitivity to bandwidth and residual tip/tilt modes is well matched to the experiment.",
keywords = "Broadband, Circumstellar debris systems, Coronagraph, EXoplanetary Circumstellar Environments and Disk Explorer, Exoplanets, High-contrast imaging, Inner working angle, Phase-induced amplitude apodization",
author = "Dan Sirbu and Thomas, {Sandrine J.} and Ruslan Belikov and Julien Lozi and Eduardo Bendek and Eugene Pluzhnik and Lynch, {Dana H.} and Troy Hix and Peter Zell and Olivier Guyon and Glenn Schneider",
year = "2016",
month = "4",
day = "1",
doi = "10.1117/1.JATIS.2.2.025002",
language = "English (US)",
volume = "2",
journal = "Journal of Astronomical Telescopes, Instruments, and Systems",
issn = "2329-4124",
publisher = "SPIE",
number = "2",

}

TY - JOUR

T1 - Demonstration of broadband contrast at 1.2 λ / D and greater for the EXCEDE starlight suppression system

AU - Sirbu, Dan

AU - Thomas, Sandrine J.

AU - Belikov, Ruslan

AU - Lozi, Julien

AU - Bendek, Eduardo

AU - Pluzhnik, Eugene

AU - Lynch, Dana H.

AU - Hix, Troy

AU - Zell, Peter

AU - Guyon, Olivier

AU - Schneider, Glenn

PY - 2016/4/1

Y1 - 2016/4/1

N2 - The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE) science mission concept uses a visible-wavelength phase-induced amplitude apodization (PIAA) coronagraph to enable high-contrast imaging of circumstellar debris systems and some giant planets at angular separations reaching into the habitable zones of some of the nearest stars. We report on the experimental results obtained in the vacuum chamber at the Lockheed Martin Advanced Technology Center in 10% broadband light centered about 650 nm, with a median contrast of 1×10-5 between 1.2 and 2.0λ/D simultaneously with 3×10-7 contrast between 2 and 11λ/D for a single-sided dark hole using a deformable mirror (DM) upstream of the PIAA coronagraph. These results are stable and repeatable as demonstrated by three measurement runs with DM settings set from scratch and maintained on the best 90% out of the 1000 collected frames. We compare the reduced experimental data with simulation results from modeling observed experimental limits. The observed performance is consistent with uncorrected low-order modes not estimated by the low-order wavefront sensor. Modeled sensitivity to bandwidth and residual tip/tilt modes is well matched to the experiment.

AB - The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE) science mission concept uses a visible-wavelength phase-induced amplitude apodization (PIAA) coronagraph to enable high-contrast imaging of circumstellar debris systems and some giant planets at angular separations reaching into the habitable zones of some of the nearest stars. We report on the experimental results obtained in the vacuum chamber at the Lockheed Martin Advanced Technology Center in 10% broadband light centered about 650 nm, with a median contrast of 1×10-5 between 1.2 and 2.0λ/D simultaneously with 3×10-7 contrast between 2 and 11λ/D for a single-sided dark hole using a deformable mirror (DM) upstream of the PIAA coronagraph. These results are stable and repeatable as demonstrated by three measurement runs with DM settings set from scratch and maintained on the best 90% out of the 1000 collected frames. We compare the reduced experimental data with simulation results from modeling observed experimental limits. The observed performance is consistent with uncorrected low-order modes not estimated by the low-order wavefront sensor. Modeled sensitivity to bandwidth and residual tip/tilt modes is well matched to the experiment.

KW - Broadband

KW - Circumstellar debris systems

KW - Coronagraph

KW - EXoplanetary Circumstellar Environments and Disk Explorer

KW - Exoplanets

KW - High-contrast imaging

KW - Inner working angle

KW - Phase-induced amplitude apodization

UR - http://www.scopus.com/inward/record.url?scp=84977490892&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84977490892&partnerID=8YFLogxK

U2 - 10.1117/1.JATIS.2.2.025002

DO - 10.1117/1.JATIS.2.2.025002

M3 - Article

AN - SCOPUS:84977490892

VL - 2

JO - Journal of Astronomical Telescopes, Instruments, and Systems

JF - Journal of Astronomical Telescopes, Instruments, and Systems

SN - 2329-4124

IS - 2

M1 - 025002

ER -