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  • SPACECRAFT PROPULSION AND POWER  (6)
  • Populus deltoides
  • 1990-1994  (6)
  • 1985-1989
  • 1940-1944
  • 1991  (6)
  • 1
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    Performance and lifetime assessment of magnetoplasmadynamic arc thruster technology (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Journal of Propulsion and Power (ISSN 0748-4658); 7; 71-83
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Life cycle cost based program decisions (1991)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The following subject areas are covered: background (space propulsion facility assessment team final report); changes (Advanced Launch System, National Aerospace Plane, and space exploration initiative); life cycle cost analysis rationale; and recommendation to panel.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA, Washington, Space Transportation Propulsion Technology Symposium. Volume 3: Panel Session Summaries and Presentations; p 989-1023
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Ion beam sputtering in electric propulsion facilities (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Experiments were undertaken to determine sputter yields of potential ion beam target materials, to assess the impact of charge exchange on beam diagnostics in large facilities, and to examine material erosion and deposition after a 957-hour test of a 5 kW-class ion thruster. The xenon ion sputter yield of flexible graphite was lower than other graphite forms especialy at high angles of incidence. Ion beam charge exchange effects were found to hamper beam probe current collection diagnostics even at pressures from 0.7 to 1.7 mPa. Estimates of the xenon ion beam envelope were made and predictions of the thickness of sputter deposited coatings in the facility were compared with measurements.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 91-2117
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Electric propulsion - An evolutionary technology (1991)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The NASA Lewis Research Center conducts and directs an electric propulsion research and technology program aimed at providing high-performance electric propulsion system options for a broad range of near- and far-term missions. This evolutionary program emphasizes the development of propulsion systems for three classes of missions: (1) near-term auxiliary propulsion applications such as North-South Stationkeeping for next generation communications satellites and orbit maintenance for orbiting platforms such as Space Station Freedom; (2) advanced solar electric propulsion and SP-100-class nuclear electric propulsion (NEP) for earth-space orbit transfer and robotic planetary missions; and (3) very high power systems to support major space missions including the Space Exploration Initiative. To cover widely disparate mission requirements, the program includes research on electrothermal, electrostatic, and electromagnetic systems. This paper provides an overview of the program with a focus on recent progress.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IAF PAPER 91-241
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Ion beam sputtering in electric propulsion facilities (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Experiments were undertaken to determine sputter yields of potential ion beam target materials, to assess the impact of charge exchange on beam diagnostics in large facilities, and to examine material erosion and deposition after a 957 hr test of a 5 kW-class ion thruster. The xenon ion sputter yield of flexible graphite was lower than other graphite forms especially at high angles of incidence. Ion beam charge exchange effects were found to hamper beam probe current collection diagnostics even at pressures from 0.7 to 1.7 mPa. Estimates of the xenon ion beam envelope were made and predictions of the thickness of sputter deposited coatings in the facility were compared with measurements.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-TM-105145 , E-6420 , NAS 1.15:105145 , AIAA PAPER 91-2117 , Joint Propulsion Conference; Jun 24, 1991 - Jun 27, 1991; Sacramento, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Test facilities for high power electric propulsion (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Electric propulsion has applications for orbit raising, maneuvering of large space systems, and interplanetary missions. These missions involve propulsion power levels from tenths to tens of megawatts, depending upon the application. General facility requirements for testing high power electric propulsion at the component and thrust systems level are defined. The characteristics and pumping capabilities of many large vacuum chambers in the United States are reviewed and compared with the requirements for high power electric propulsion testing.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-TM-105247 , E-6576 , NAS 1.15:105247 , AIAA PAPER 91-3499 , Conference on Advanced Space Exploration Initiative Technologies; Sep 04, 1991 - Sep 06, 1991; Cleveland, OH; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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