Dr. Joseph D. Adams Profile

Dr. Joseph D. Adams

Research Associate at Cornell Univ

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 19 August 2014 Paper

Paper

SWCam: the short wavelength camera for the CCAT Observatory

Gordon Stacey, Stephen Parshley, Thomas Nikola, German Cortes-Medellin, Justin Schoenwald, Ganesh Rajagopalan, Michael Niemack, Tim Jenness, Patricio Gallardo, Brian Koopman, Charles Dowell, Peter Day, Matthew Hollister, Attila Kovacs, Henry LeDuc, Christopher McKenney, Ryan Monroe, Hiroshige Yoshida, Jonas Zmuidzinas, Loren Swenson, Simon Radford, Hien Trong Nguyen, Anthony Mroczkowski, Jason Glenn, Jordan Wheeler, Philip Maloney, Spencer Brugger, Joseph Adams, Frank Bertoldi, Reinhold Schaaf, Mark Halpern, Douglas Scott, Galen Marsden, Jack Sayers, Scott Chapman, Joaquin Vieira

Proceedings Volume 9153, 91530L (2014) https://doi.org/10.1117/12.2057101

KEYWORDS: Cameras, Galactic astronomy, Sensors, Silicon, Stars, Thin film coatings, Telescopes, Deep reactive ion etching, Surface conduction electron emitter displays, Observatories

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We describe the Short Wavelength Camera (SWCam) for the CCAT observatory including the primary science drivers, the coupling of the science drivers to the instrument requirements, the resulting implementation of the design, and its performance expectations at first light. CCAT is a 25 m submillimeter telescope planned to operate at 5600 meters, near the summit of Cerro Chajnantor in the Atacama Desert in northern Chile. CCAT is designed to give a total wave front error of 12.5 μm rms, so that combined with its high and exceptionally dry site, the facility will provide unsurpassed point source sensitivity deep into the short submillimeter bands to wavelengths as short as the 200 μm telluric window. The SWCam system consists of 7 sub-cameras that address 4 different telluric windows: 4 subcameras at 350 μm, 1 at 450 μm, 1 at 850 μm, and 1 at 2 mm wavelength. Each sub-camera has a 6’ diameter field of view, so that the total instantaneous field of view for SWCam is equivalent to a 16’ diameter circle. Each focal plane is populated with near unit filling factor arrays of Lumped Element Kinetic Inductance Detectors (LEKIDs) with pixels scaled to subtend an solid angle of (λ/D)2 on the sky. The total pixel count is 57,160. We expect background limited performance at each wavelength, and to be able to map < 35(°)2 of sky to 5 σ on the confusion noise at each wavelength per year with this first light instrument. Our primary science goal is to resolve the Cosmic Far-IR Background (CIRB) in our four colors so that we may explore the star and galaxy formation history of the Universe extending to within 500 million years of the Big Bang. CCAT's large and high-accuracy aperture, its fast slewing speed, use of instruments with large format arrays, and being located at a superb site enables mapping speeds of up to three orders of magnitude larger than contemporary or near future facilities and makes it uniquely sensitive, especially in the short submm bands.

Proceedings Article | 28 July 2014 Paper

Paper

Design updates and status of the fourth generation TripleSpec spectrograph

E. Schlawin, T. Herter, C. Henderson, J. Wilson, R. Probst, D. Sprayberry, M. Bonati, P. Schurter, D. James, M. Warner, R. Tighe, J. Adams, M. Martínez

Proceedings Volume 9147, 91472H (2014) https://doi.org/10.1117/12.2055233

KEYWORDS: Spectrographs, Sensors, Telescopes, Stars, Space telescopes, Prisms, Asteroids, Observatories, Electroluminescent displays, Calibration

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Proceedings Article | 23 July 2014 Paper

Paper

The opto-cryo-mechanical design of the short wavelength camera for the CCAT Observatory

Stephen Parshley, Joseph Adams, Thomas Nikola, Gordon Stacey

Proceedings Volume 9153, 91532A (2014) https://doi.org/10.1117/12.2056984

KEYWORDS: Cameras, Silicon, Telescopes, Lenses, Observatories, Cryogenics, Cryocoolers, Aluminum, Sensors, Optical design

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Proceedings Article | 24 September 2012 Paper

Paper

The FORCAST mid-infrared facility instrument and in-flight performance on SOFIA

Joseph Adams, Terry Herter, George Gull, Justin Schoenwald, Charles Henderson, Luke Keller, James De Buizer, Gordon Stacey, Thomas Nikola, William Vacca, Lea Hirsch, Jason Wang, L. Andrew Helton

Proceedings Volume 8446, 844616 (2012) https://doi.org/10.1117/12.926600

KEYWORDS: Sensors, Calibration, Telescopes, Mirrors, Spectroscopes, Optical filters, Quantum efficiency, Signal to noise ratio, Stars, Spectroscopy

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Proceedings Article | 21 July 2010 Paper

Paper

Quick-look reduction software for FORCAST grism mode on SOFIA

Casey Deen, Luke Keller, Nirbhik Chitrakar, Kimberly Ennico, Daniel Jaffe, Joseph Adams, Thomas Greene, Terry Herter, Gregory Sloan

Proceedings Volume 7735, 773570 (2010) https://doi.org/10.1117/12.856608

KEYWORDS: Calibration, Cameras, Telescopes, Sensors, Silicon, Optical filters, Spectral resolution, Spectroscopes, Software development, Image processing

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Proceedings Article | 21 July 2010 Paper

Paper

Progress report on FORCAST grism spectroscopy as a future general observer instrument mode on SOFIA

Luke Keller, Casey Deen, Daniel Jaffe, Kimberly Ennico, Thomas Greene, Joseph Adams, Terry Herter, Gregory Sloan

Proceedings Volume 7735, 77356N (2010) https://doi.org/10.1117/12.857127

KEYWORDS: Calibration, Spectroscopes, Spectroscopy, Data acquisition, Software development, Spectral calibration, Imaging spectroscopy, Mid-IR, Optical filters, Astronomy

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Proceedings Article | 15 July 2010 Paper

Paper

FORCAST: a first light facility instrument for SOFIA

Joseph Adams, Terry Herter, George Gull, Justin Schoenwald, Charles Henderson, Luke Keller, James De Buizer, Gordon Stacey, Thomas Nikola

Proceedings Volume 7735, 77351U (2010) https://doi.org/10.1117/12.857049

KEYWORDS: Mirrors, Telescopes, Sensors, Calibration, Optical filters, Stars, Quantum efficiency, Signal to noise ratio, Jupiter, Infrared imaging

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Proceedings Article | 9 July 2008 Paper

Paper

FORCAST: the first light instrument for SOFIA

Joseph Adams, Terry Herter, George Gull, Justin Schoenwald, Luke Keller, Marc Berthoud, Gordon Stacy, Thomas Nikola, Charles Henderson

Proceedings Volume 7014, 70142F (2008) https://doi.org/10.1117/12.789510

KEYWORDS: Telescopes, Mirrors, Optical filters, Sensors, Cameras, Calibration, Image quality, Beam splitters, Point spread functions, Astronomy

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Proceedings Article | 9 July 2008 Paper

Paper

The performance of TripleSpec at Palomar

Terry Herter, Charles Henderson, John Wilson, Keith Matthews, Gustavo Rahmer, Marco Bonati, Philip Muirhead, Joseph Adams, James Lloyd, Michael Skrutskie, Dae-Sik Moon, Stephen Parshley, Matthew Nelson, Frantz Martinache, George Gull

Proceedings Volume 7014, 70140X (2008) https://doi.org/10.1117/12.789660

KEYWORDS: Telescopes, Spectrographs, Mirrors, Prisms, Space telescopes, Stars, Sensors, Cameras, Spectral resolution, Observatories

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Proceedings Article | 9 July 2008 Paper

Paper

A silicon and KRS-5 grism suite for FORCAST on SOFIA

Casey Deen, Luke Keller, Kimberly Ennico, Daniel Jaffe, Jasmina Marsh, Joseph Adams, Nirbhik Chitrakar, Thomas Greene, Douglas Mar, Terry Herter

Proceedings Volume 7014, 70142C (2008) https://doi.org/10.1117/12.788565

KEYWORDS: Silicon, Spectral resolution, Cameras, Optical filters, Space telescopes, Stars, Absorption, Calibration, Spectroscopes, Telescopes

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Proceedings Article | 29 June 2006 Paper

Paper

Grism performance for mid-IR (5-40 micron) spectroscopy

K. Ennico, L. Keller, D. Mar, T. Herter, D. Jaffe, J. Adams, T. Greene

Proceedings Volume 6269, 62691Q (2006) https://doi.org/10.1117/12.672256

KEYWORDS: Silicon, Spectroscopes, Mid-IR, Spectroscopy, Molecules, Spectral resolution, Stars, Infrared spectroscopy, Infrared radiation, Astronomy

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Proceedings Article | 28 June 2006 Paper

Paper

FORCAST: the facility mid-IR camera for SOFIA

Joseph Adams, Terry Herter, Luke Keller, George Gull, Bruce Pirger, Justin Schoenwald, Marc Berthoud, Gordon Stacy, Thomas Nikola

Proceedings Volume 6269, 626911 (2006) https://doi.org/10.1117/12.671414

KEYWORDS: Cameras, Mirrors, Telescopes, Sensors, Optical filters, Electronics, Space telescopes, Staring arrays, Distortion, Silicon

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Proceedings Article | 15 June 2006 Paper

Paper

High-speed highly flexible reconfigurable data acquisition system for astronomy

Bruce Pirger, Justin Schoenwald, Terry Herter, George Gull, Joseph Adams, Luke Keller, Marc Berthoud, Charles Henderson, Gordon Stacy, Thomas Nikola

Proceedings Volume 6276, 62760X (2006) https://doi.org/10.1117/12.672249

KEYWORDS: Field programmable gate arrays, Sensors, Analog electronics, Data acquisition, Electronics, Mirrors, Clocks, Digital signal processing, Connectors, Staring arrays

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We have developed a high speed, flexible, data acquisition system and targeted it to astronomical imaging. The system is based on Field Programmable Gate Arrays (FPGAs) and provides a gigabit/sec fiber optic link between the electronics located on the instrument and the host computer. The FPGAs are reconfigurable over the fiber optic link for maximum flexibility. The system has initially been targeted at DRS Technologies' 256x256 Si:As and Si:Sb detectors used in FORCAST¹, a mid-IR camera/spectrograph built by Cornell University for SOFIA. The initial configuration provides sixteen parallel channels of six Msamples/second 14-bit analog to digital converters. The system can coadd 256x256 images at over 1000 frames per second in up to 64 different memory positions. Array clocking and sampling is generated from uploaded clocking patterns in two independent memories. This configuration allows the user to quickly create, on the fly, any form of array clocking and sampling (destructive, non-destructive, sample up the ramp, additional reset frames, Fowler, single frames, co-added frames, multi-position chop, throw away frames, etc.) The electronics were designed in a modular fashion so that any number of analog channels from arrays or mosaics of arrays can be accommodated by using the appropriate number of FPGA boards and preamps. The preamp/analog to digital converter boards can be replaced as needed to operate any focal plane array or other sensor. The system also provides analog drive capability for controlling an X-Y chopping secondary mirror, nominal two position chopping, and can also synchronize to an externally driven chop source. Multiple array controllers can be synchronized together, allowing multi-channel systems to share a single chopping secondary, yet clock the focal planes differently from each other. Due to the flexibility of the FPGAs, it is possible to develop highly customized operating modes to maximize system performance or to enable novel observations and applications.

Proceedings Article | 30 September 2004 Paper

Paper

First test results from FORCAST: the facility mid-IR camera for SOFIA

Luke Keller, Terry Herter, Gordon Stacey, George Gull, Justin Schoenwald, Bruce Pirger, Joseph Adams, Marc Berthoud, Thomas Nikola

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.552333

KEYWORDS: Cameras, Optical filters, Telescopes, Mirrors, Detector arrays, Staring arrays, Sensors, Space telescopes, Distortion, Image filtering

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Proceedings Article | 30 September 2004 Paper

Paper

Mass producing an efficient NIR spectrograph

John Wilson, Charles Henderson, Terry Herter, Keith Matthews, Michael Skrutskie, Joseph Adams, Dae-Sik Moon, Roger Smith, Nick Gautier, Michael Ressler, B. T. Soifer, Sean Lin, James Howard, John LaMarr, Todd Stolberg, Jeff Zink

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.550925

KEYWORDS: Spectrographs, Telescopes, Sensors, Cameras, Space telescopes, Prisms, Near infrared, Collimation, Reflectivity, Mercury cadmium telluride

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Proceedings Article | 29 September 2004 Paper

Paper

Testing of mid-infrared detector arrays for FORCAST

Joseph Adams, Terry Herter, Luke Keller, George Gull, Bruce Pirger, Justin Schoenwald, Marc Berthoud

Proceedings Volume 5499, (2004) https://doi.org/10.1117/12.551490

KEYWORDS: Sensors, Detector arrays, Electronics, Multiplexers, Telescopes, Cameras, Mid-IR, Optical filters, Infrared sensors, Infrared cameras

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Proceedings Article | 7 March 2003 Paper

Paper

MIRSI: a mid-infrared spectrometer and imager

Lynne Deutsch, Joseph Hora, Joseph Adams, Marc Kassis

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461436

KEYWORDS: Digital signal processing, Telescopes, Cameras, Imaging systems, Spectroscopy, Human-machine interfaces, Mid-IR, Optical filters, Sensors, Clocks

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Showing 5 of 17 publications

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