Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Andrew S. Keys"'
Publikováno v:
AIAA SPACE 2009 Conference & Exposition.
NASA's newly named Advanced Avionics and Processor Systems (AAPS) project, formerly known as the Radiation Hardened Electronics for Space Environments (RHESE) project, endeavors to mature and develop the avionic and processor technologies required to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::315045dae5fdc0ca66f14205b0b3dd48
https://doi.org/10.2514/6.2009-6783
https://doi.org/10.2514/6.2009-6783
Autor:
Andrew S. Keys, Richard L. Fork
Publikováno v:
Optics express. 7(9)
We present a customized multilayered dielectric stack employed as a broadband phase modulator with 6.3 THz optical bandwidth. The bandpass modulator provides up to a full-cycle of near-uniform phase modulation across a defined signal spectrum with ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::342ea7bad6039f3e17e54203245309f2
https://pubmed.ncbi.nlm.nih.gov/19407881
https://pubmed.ncbi.nlm.nih.gov/19407881
Publikováno v:
AIAA SPACE 2008 Conference & Exposition.
NASA's Radiation Hardened Electronics for Space Exploration (RHESE) project develops the advanced technologies required to produce radiation hardened electronics, processors, and devices in support of the requirements of NASA's Constellation program.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31a6c06c6e0905daa47e7d5050504b32
https://doi.org/10.2514/6.2008-7673
https://doi.org/10.2514/6.2008-7673
Autor:
Andrew S. Keys, James H. Adams, John D. Cressler, Ronald C. Darty, Michael A. Johnson, Marshall C. Patrick, Mohamed S. El-Genk
Publikováno v:
AIP Conference Proceedings.
The Radiation Hardened Electronics for Space Environments (RHESE) project develops advanced technologies needed for high performance electronic devices that will be capable of operating within the demanding radiation and thermal extremes of the space
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e55b622c44481fca4ae901c0e9a00e44
https://doi.org/10.1063/1.2845040
https://doi.org/10.1063/1.2845040
Publikováno v:
42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit.
Aerocapture System Technology for Planetary Missions is being proposed to NASA's New Millennium Program for flight aboard the Space Technology 9 (ST9) flight opportunity. The proposed ST9 aerocapture mission is a system-level flight validation of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11326e9826bf9762d981bb9a58c838d3
https://doi.org/10.2514/6.2006-4518
https://doi.org/10.2514/6.2006-4518
Autor:
Marc T. Jacoby, William A. Goodman, William Hogue, Harlan Haight, Ron Eng, James B. Hadaway, Andrew S. Keys, Jack C. Reily, Jeffrey R. Kegley, H. Philip Stahl, John M. Tucker, Richard Siler, James R. Carpenter, Jeff McCracken, Ernest R. Wright
Publikováno v:
SPIE Proceedings.
SLMS athermal technology has been demonstrated in the small 4-foot helium cryogenic test chamber located at the NASA/MSFC X-Ray Calibration Facility (XRCF). A SLMS Ultraviolet Demonstrator Mirror (UVDM) produced by Schafer under a NASA/MSFC Phase I S
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd8ebe3ae15136c84939caa6702b0e46
https://doi.org/10.1117/12.508378
https://doi.org/10.1117/12.508378
Autor:
Paul R. Ashley, Robert W. Crow, Thomas R. Nelson, Jack H. Parker, Andrew S. Keys, Elizabeth A. Beecher
Publikováno v:
Frontiers in Optics 2004/Laser Science XXII/Diffractive Optics and Micro-Optics/Optical Fabrication and Testing.
This effort describes the fabrication and testing of binary-phase Fourier gratings designed to generate an incoherent array of output source points with nonuniform user-defined intensities, symmetric about the zeroth order. Like Dammann fanout gratin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7da8a83cb9c77118a0e07f8ad1e05024
https://doi.org/10.1364/domo.2004.dmc8
https://doi.org/10.1364/domo.2004.dmc8
Publikováno v:
Gradient Index, Miniature, and Diffractive Optical Systems III.
This effort describes a design method used to develop a binary-phase Fourier grating that generates an incoherent array of output source points with nonuniform user-defined intensities, symmetric about the zeroth order. Like the Dammann fanout gratin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b701de3f47c7fc65fafbc567631ccbe
https://doi.org/10.1117/12.507360
https://doi.org/10.1117/12.507360
Publikováno v:
SPIE Proceedings.
We describe a multilayered dielectric stack configuration designed specifically for use as a transmissive phase modulator for broadband optical signals. Applications for this device range from full aperture wavefront correction to nonmechanical beam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95465919feccbdbc0410339bfb23b0b0
https://doi.org/10.1117/12.451482
https://doi.org/10.1117/12.451482
Autor:
Darryl K. Jones, Richard L. Fork, J.E. Ehret, John P. Loehr, Thomas R. Nelson, Andrew S. Keys, Rebecca H. Trimm, Lisa J. Gamble, Qianghua Xie, Spencer T. Cole, William M. Diffey, Joseph E. Van Nostrand
Publikováno v:
SPIE Proceedings.
There is a growing interest in the fabrication of semiconductor optical group delay lines for the development of phased arrays of Vertical-Cavity Surface-Emitting Lasers (VCSELs). We present a novel structure incorporating In(x)GA(1-x)As quantum well
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f973a70051d55de4919214f9b4a999e
https://doi.org/10.1117/12.354675
https://doi.org/10.1117/12.354675