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  • 1990-1994  (5)
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  • 1
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    Multimegawatt electric propulsion system design considerations (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Piloted Mars mission requirements of relatively short trip times and low initial mass in earth orbit as identified by the NASA Space Exploration Initiative, indicate the need for multimegawatt electric propulsion systems. The design considerations and results for two thruster types, the argon ion and hydrogen magnetoplasmadynamic thrusters, are addressed in terms of configuration, performance, and mass projections. Preliminary estimates of Power Management and Distribution for these systems are given. Some assessment of these systems' performance in a reference Space Exploration Initiative piloted mission are discussed. Research and development requirements of these systems are also described.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 90-2552
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Early Track NEP system options for SEI missions (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A development option for nuclear electric propulsion, the 'Early Track' option, is considered from system and mission application viewpoints. The intent of this development option is to address demanding missions of the future, such as robotic outer planet exploration or the Space Exploration Initiative. The 'Early Track' scheme utilizes existing technologies, such as the SP-100 space reactor and radiator components, as well as subsystems scalable from existing programs, such as 50 to 100 kWe ion thrusters. Up to 1.5 MWe of powder can be generated by the existing 2.4 MWt SP-100 reactor through the use of dynamic Rankine or Brayton power conversion. The performance characteristics of these systems are projected, and assessed for SEI missions currently under consideration.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 92-3200
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Evolutionary use of nuclear electric propulsion (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Evolving new propulsion technologies through a rational and conscious effort to minimize development costs and program risks while maximizing the performance benefits is intuitively practical. A phased approach to the evolution of nuclear electric propulsion from use on planetary probes, to lunar cargo vehicles, and finally to manned Mars missions with a concomitant growth in technology is considered. Technology levels and system component makeup are discussed for nuclear power systems and both ion and magnetoplasmadynamic thrusters. Mission scenarios are described, which include analysis of a probe to Pluto, a lunar cargo mission, Martian split, all-up, and quick-trip mission options. Evolutionary progression of the use of NEP in such missions is discussed.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 90-3821
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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    Solar electric propulsion for Mars transport vehicles (1990)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Solar electric propulsion (SEP) is an alternative to chemical and nuclear powered propulsion systems for both piloted and unpiloted Mars transport vehicles. Photovoltaic solar cell and array technologies were evaluated as components of SEP power systems. Of the systems considered, the SEP power system composed of multijunction solar cells in an ENTECH domed fresnel concentrator array had the least array mass and area. Trip times to Mars optimized for minimum propellant mass were calculated. Additionally, a preliminary vehicle concept was designed.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-TM-103234 , E-5654 , NAS 1.15:103234
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 5
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    Unknown
    Multimegawatt electric propulsion system design considerations (1991)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Piloted Mars Mission Requirements of relatively short trip times and low initial mass in Earth orbit as identified by the NASA Space Exploration Initiative, indicate the need for multimegawatt electric propulsion systems. The design considerations and results for two thruster types, the argon ion, and hydrogen magnetoplasmadynamic thrusters, are addressed in terms of configuration, performance, and mass projections. Preliminary estimates of power management and distribution for these systems are given. Some assessment of these systems' performance in a reference Space Exploration Initiative piloted mission are discussed. Research and development requirements of these systems are also described.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-TM-105152 , E-6437 , NAS 1.15:105152 , AIAA PAPER 90-2552 , International Electric Propulsion Conference; Jul 18, 1990 - Jul 20, 1990; Orlando, FL; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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