Dr. Dennis Ebbets Profile

Dr. Dennis Ebbets

Staff Consultant at BAE Systems Inc

SPIE Involvement:

Author

Publications (24)

Proceedings Article | 27 July 2016 Paper

Characterization of an ultraviolet imaging detector with high event rate ROIC (HEROIC) readout

Nicholas Nell, Kevin France, Alex Harwit, Scott Bradley, Steve Franka, Ed Freymiller, Dennis Ebbets

Proceedings Volume 9915, 99152L (2016) https://doi.org/10.1117/12.2233816

KEYWORDS: Readout integrated circuits, Microchannel plates, Sensors, Image sensors, Photon counting, Aerospace engineering, Ultraviolet radiation, Opacity, Sensors, Photodiodes, Lamps

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Proceedings Article | 23 July 2014 Paper

High event rate ROICs (HEROICs) for astronomical UV photon counting detectors

Alex Harwit, Kevin France, Vic Argabright, Steve Franka, Ed Freymiller, Dennis Ebbets

Proceedings Volume 9154, 91541N (2014) https://doi.org/10.1117/12.2055010

KEYWORDS: Readout integrated circuits, Electrons, Sensors, Microchannel plates, Astronomy, Photon counting, Amplifiers, Ultraviolet radiation, Clouds, CCD image sensors

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Proceedings Article | 18 September 2013 Paper

A conceptual design for a Cassegrain-mounted high-resolution optical spectrograph for large-aperture telescopes

Cynthia Froning, Steven Osterman, Eric Burgh, Matthew Beasley, Paul Scowen, Todd Veach, Steven Jordan, Dennis Ebbets, Michael Lieber, James deCino, Bruno Vaz Castilho, Clemens Gneiding, Antonio César de Oliveira

Proceedings Volume 8836, 88360Y (2013) https://doi.org/10.1117/12.2024056

KEYWORDS: Spectrographs, Telescopes, Optical benches, Sensors, Optical instrument design, Calibration, Cameras, Charge-coupled devices, Gemini Observatory, Thermal modeling

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SPIE Journal Paper | 15 July 2013 Open Access

New paradigm for rapid production of large precision optics: frozen membrane mirror technology

Michael Lieber, Stephen Kendrick, Sarah Lipscy, Dennis Ebbets, Scott Acton, Scott Knight

OE, Vol. 52, Issue 09, 091810, (July 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.9.091810

KEYWORDS: Mirrors, Optics manufacturing, Precision optics, Manufacturing, Actuators, Wavefront sensors, Space telescopes, Control systems, Adaptive optics, Reflectivity

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SPIE Journal Paper | 22 May 2013 Open Access

Telescope with 100 square degree field-of-view for NASA’s Kepler mission

Dennis Ebbets, Chris Stewart, Peter Spuhler, Paul Atcheson, Jeffrey Van Cleve, Stephen Bryson, Andrew Clarkson, John Barentine

OE, Vol. 52, Issue 09, 091808, (May 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.9.091808

KEYWORDS: Stars, Telescopes, Space telescopes, Sensors, Planets, Mirrors, Aerospace engineering, Photometry, Integrated optics, System integration

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Proceedings Article | 13 September 2012 Paper

Silicon immersion gratings and their spectroscopic applications

Jian Ge, Bo Zhao, Scott Powell, Adam Fletcher, Xiaoke Wan, Liang Chang, Hali Jakeman, Dimitrios Koukis, David Tanner, Dennis Ebbets, Jonathan Weinberg, Sarah Lipscy, Rich Nyquist, John Bally

Proceedings Volume 8450, 84502U (2012) https://doi.org/10.1117/12.925803

KEYWORDS: Infrared spectroscopy, Silicon, Spectroscopy, Spectrographs, Stars, Near infrared, Diffraction gratings, Infrared telescopes, Coating, Spectral resolution

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Silicon immersion gratings (SIGs) offer several advantages over the commercial echelle gratings for high resolution infrared (IR) spectroscopy: 3.4 times the gain in dispersion or ~10 times the reduction in the instrument volume, a multiplex gain for a large continuous wavelength coverage and low cost. We present results from lab characterization of a large format SIG of astronomical observation quality. This SIG, with a 54.74 degree blaze angle (R1.4), 16.1 l/mm groove density, and 50x86 mm² grating area, was developed for high resolution IR spectroscopy (R~70,000) in the near IR (1.1-2.5 μm). Its entrance surface was coated with a single layer of silicon nitride antireflection (AR) coating and its grating surface was coated with a thin layer of gold to increase its throughput at 1.1-2.5 m. The lab measurements have shown that the SIG delivered a spectral resolution of R=114,000 at 1.55 m with a lab testing spectrograph with a 20 mm diameter pupil. The measured peak grating efficiency is 72% at 1.55 m, which is consistent with the measurements in the optical wavelengths from the grating surface at the air side. This SIG is being implemented in a new generation cryogenic IR spectrograph, called the Florida IR Silicon immersion grating spectrometer (FIRST), to offer broad-band high resolution IR spectroscopy with R=72,000 at 1.4-1.8 um under a typical seeing condition in a single exposure with a 2kx2k H2RG IR array at the robotically controlled Tennessee State University 2-meter Automatic Spectroscopic Telescope (AST) at Fairborn Observatory in Arizona. FIRST is designed to provide high precision Doppler measurements (~4 m/s) for the identification and characterization of extrasolar planets, especially rocky planets in habitable zones, orbiting low mass M dwarf stars. It will also be used for other high resolution IR spectroscopic observations of such as young stars, brown dwarfs, magnetic fields, star formation and interstellar mediums. An optimally designed SIG of the similar size can be used in the Silicon Immersion Grating Spectrometer (SIGS) to fill the need for high resolution spectroscopy at mid IR to far IR (~25-300 μm) for the NASA SOFIA airborne mission in the future.

Proceedings Article | 15 September 2011 Paper

In-flight photometric performance of the 96Mpx focal plane array assembly for NASA's Kepler exoplanet mission

D. Ebbets, V. Argabright, J. Stober, J. VanCleve, D. Caldwell, J. Kolodziejczak

Proceedings Volume 8146, 81460H (2011) https://doi.org/10.1117/12.897443

KEYWORDS: Stars, Sensors, Charge-coupled devices, Exoplanets, Space operations, Planets, Space telescopes, Telescopes, Photometry, Aerospace engineering

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Proceedings Article | 15 September 2011 Paper

Optical performance of the 100-sq deg field-of-view telescope for NASA's Kepler exoplanet mission

D. Ebbets, P. Atcheson, C. Stewart, P. Spuhler, J. Van Cleve, S. Bryson

Proceedings Volume 8146, 81460G (2011) https://doi.org/10.1117/12.897445

KEYWORDS: Stars, Space telescopes, Telescopes, Photometry, Mirrors, Aerospace engineering, Planets, Exoplanets, Sensors, Point spread functions

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Proceedings Article | 6 August 2010 Paper

ATLAST-9.2m: a large-aperture deployable space telescope

William Oegerle, Lee Feinberg, Lloyd Purves, T. Tupper Hyde, Harley Thronson, Jacqueline Townsend, Marc Postman, Matthew Bolcar, Jason Budinoff, Bruce Dean, Mark Clampin, Dennis Ebbets, Qian Gong, Theodore Gull, Joseph Howard, Andrew Jones, Richard Lyon, Bert Pasquale, Charles Perrygo, Jeffrey Smith, Patrick Thompson, Bruce Woodgate

Proceedings Volume 7731, 77312M (2010) https://doi.org/10.1117/12.857622

KEYWORDS: Mirrors, Space telescopes, Telescopes, James Webb Space Telescope, Sensors, Sun, Observatories, Ultraviolet radiation, Stray light, Stars

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Proceedings Article | 14 June 2006 Paper

Characterization of a star/planet simulator for evaluating extrasolar planet detection techniques

Stephen Kendrick, Christopher Robb, Dennis Ebbets, Paul Atcheson

Proceedings Volume 6265, 62651Q (2006) https://doi.org/10.1117/12.669065

KEYWORDS: Stars, Planets, Surface plasmons, Coronagraphy, Mirrors, Device simulation, Optical simulations, Light, Xenon, Lamps

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Proceedings Article | 14 June 2006 Paper

Architecture concept for a 10m UV-optical space telescope

Dennis Ebbets, James DeCino, James Green

Proceedings Volume 6265, 62651S (2006) https://doi.org/10.1117/12.670466

KEYWORDS: Space telescopes, Mirrors, Observatories, Telescopes, Robotics, Space operations, Stars, Ultraviolet radiation, Astronomy, Astronomical imaging

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Proceedings Article | 13 June 2006 Paper

Mission and instrumentation concept for the Baryonic Structure Probe

Dennis Ebbets, James DeCino, Jennifer Turner-Valle, Kenneth Sembach

Proceedings Volume 6266, 62660I (2006) https://doi.org/10.1117/12.670488

KEYWORDS: Absorption, Imaging spectroscopy, Sensors, Spectroscopy, Mirrors, Diffraction gratings, Space telescopes, Ultraviolet radiation, Space operations, Galactic astronomy

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Proceedings Article | 1 November 2004 Paper

Spaceborne optical coronagraph requirements including exo-solar planet and star testbed simulation

Stephen Kendrick, Jennifer Turner-Valle, Dennis Ebbets, Robert Bates

Proceedings Volume 5555, (2004) https://doi.org/10.1117/12.557847

KEYWORDS: Mirrors, Coronagraphy, Stars, Planets, Coating, Reflectivity, Optics manufacturing, Polarization, Phase modulation, Telescopes

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Proceedings Article | 12 October 2004 Paper

Optical coronagraph testbed requirements and design for exoplanet and star simulation

Stephen Kendrick, Jennifer Turner-Valle, Dennis Ebbets, Robert Bates, David Chaney

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.549465

KEYWORDS: Mirrors, Stars, Planets, Coronagraphy, Device simulation, Wavefronts, Spatial frequencies, James Webb Space Telescope, Telescopes, Relays

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Proceedings Article | 8 December 2003 Paper

Preliminary calibration results for the HST/cosmic origins spectrograph

Erik Wilkinson, Stephane Beland, Cynthia Froning, James Green, Steven Osterman, Steven Penton, Thomas Delker, Dennis Ebbets, Adrian Martin, Jason McPhate, John Vallerga, Scott Friedman, George Hartig, Charles Keyes, Claus Leitherer, Kenneth Sembach, David Sahnow

Proceedings Volume 5164, (2003) https://doi.org/10.1117/12.505870

KEYWORDS: Calibration, Sensors, Spectrographs, Cadmium sulfide, Spectral resolution, Lamps, Spatial resolution, Mirrors, Spectral calibration, Carbon monoxide

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Proceedings Article | 8 December 2003 Paper

Radiation-induced phosphorescence in UV window materials

Steve Osterman, Dennis Ebbets

Proceedings Volume 5164, (2003) https://doi.org/10.1117/12.506415

KEYWORDS: Phosphorescence, Ultraviolet radiation, Sensors, Spectroscopy, Visible radiation, Signal detection, Aerospace engineering, Strontium, Detector development, Absorption

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Proceedings Article | 3 March 2003 Paper

Phenomenology of extra-solar planets in reflected light and system level requirements for detection and characterization

Dennis Ebbets, Steven Kilston, Roger Linfield

Proceedings Volume 4860, (2003) https://doi.org/10.1117/12.457641

KEYWORDS: Planets, Stars, Earth's atmosphere, Telescopes, Coronagraphy, Planetary systems, Sun, Atmospheric modeling, Exoplanets, Spectroscopy

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Proceedings Article | 24 February 2003 Paper

The 4-m space telescope for investigating extrasolar Earthlike planets in starlight:TPF is HST2

Robert Brown, Christopher Burrows, Stefano Casertano, Mark Clampin, Dennis Ebbets, Eric Ford, Kenneth Jucks, N. Jeremy Kasdin, Steven Kilston, Marc Kuchner, Sara Seager, Alessandro Sozzetti, David Spergel, Wesley Traub, John Trauger, Edwin Turner

Proceedings Volume 4854, (2003) https://doi.org/10.1117/12.459819

KEYWORDS: Planets, Stars, Signal to noise ratio, Space telescopes, Hubble Space Telescope, Coronagraphy, Wavefronts, Exoplanets, Telescopes, Point spread functions

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Proceedings Article | 28 July 2000 Paper

TRW/Ball: Next Generation Space Telescope (NGST)

James Crocker, Charles Atkinson, Dennis Ebbets, Larry Gilman, Paul Lightsey, Douglas Neam, Scott Texter

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.394044

KEYWORDS: Space telescopes, Telescopes, Mirrors, Sensors, Observatories, Point spread functions, Aerospace engineering, Imaging spectroscopy, Reflectivity, Gold

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Proceedings Article | 28 August 1998 Paper

Performance overview and science goals of the Cosmic Origins Spectrograph for the Hubble Space Telescope

Jon Morse, James Green, Dennis Ebbets, John Andrews, Sara Heap, Claus Leitherer, J. Linsky, Blair Savage, J. Shull, Theodore Snow, S. Alan Stern, John Stocke, Erik Wilkinson

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324537

KEYWORDS: Carbon monoxide, Ultraviolet radiation, Stars, Spectroscopy, Spectrographs, Galactic astronomy, Sensors, Hubble Space Telescope, Spectral resolution, Channel projecting optics

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Proceedings Article | 28 August 1998 Paper

On-orbit optical performance of the Space Telescope Imaging Spectrograph

Charles Bowers, Bruce Woodgate, Randy Kimble, M. Kaiser, Theodore Gull, Steven Kraemer, George Hartig, David Content, Dennis Ebbets, David Michika, Joseph Sullivan, Robert Woodruff, M. Bottema, Don Lindler, P. Plait, Clive Standley, Nicholas Collins, R. Cornett, Wayne Landsman, Eliot Malumuth, R. Robinson

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324541

KEYWORDS: Sensors, Ultraviolet radiation, Cameras, Spectral resolution, Image resolution, Spectroscopy, Mirrors, Space telescopes, Lamps, Spectrographs

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Proceedings Article | 2 June 1995 Paper

Plans for the prelaunch calibration of the Space Telescope Imaging Spectrograph

Dennis Ebbets, Mary Elizabeth Kaiser, Bruce Woodgate, Randy Kimble, Don Lindler

Proceedings Volume 2478, (1995) https://doi.org/10.1117/12.210946

KEYWORDS: Calibration, Sensors, Lamps, Spectrographs, Data acquisition, Ultraviolet radiation, Spectral resolution, Light scattering, Monochromators, Space telescopes

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Proceedings Article | 1 November 1993 Paper

Instrumental artifacts: stray and scattered light in the Goddard High-Resolution Spectrograph aboard the Hubble Space Telescope

Dennis Ebbets

Proceedings Volume 1945, (1993) https://doi.org/10.1117/12.158766

KEYWORDS: Sensors, Calibration, Diodes, Light scattering, Spectral resolution, Stray light, Diffraction gratings, Optical components, Reflection, Vignetting

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