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  • LAUNCH VEHICLES AND SPACE VEHICLES  (6)
  • PLASMA PHYSICS  (6)
  • 1975-1979  (12)
  • 1935-1939
  • 1
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    Structural alignment sensor (1978)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: Comparative Michelson interferometers are discussed as well as the operating range potential of a structural alignment sensor (SAS) which requires only one laser mode. Schematics are presented for the distance measurement logic, the basic SAS system, the SAS optical layout, the coarse measurement signal processor, and the measured range resolution.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA. Langley Res. Center Large Space Systems Technol., Vol. 1; p 491-505
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Measurement techniques for analysis of fission fragment excited gases (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Spectroscopic analysis of fission fragment excited He, Ar, Xe, N2, Ne, Ar-N2, and Ne-N2 have been conducted. Boltzmann plot analysis of He, Ar and Xe have indicated a nonequilibrium, recombining plasma, and population inversions have been found in these gases. The observed radiating species in helium have been adequately described by a simple kinetic model. A more extensive model for argon, nitrogen and Ar-N2 mixtures was developed which adequately describes the energy flow in the system and compares favorably with experimental measurements. The kinetic processes involved in these systems are discussed.
    Keywords: PLASMA PHYSICS
    Type: Princeton Univ. Partially Ionized Plasmas, Including the 3rd Symp. on Uranium Plasmas; p 80-90
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Oxygen impurity radiation from Tokamak-like plasmas (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: We have constructed a nonhydrodynamic coronal model for calculating radiation from impurity atoms in a heated plasma. Some recent developments in the calculation of dielectronic recombination rate coefficients and collisional excitation rate coefficients are included. The model is applied to oxygen impurity radiation during the first few milliseconds of a TFR Tokamak plasma discharge, and good agreement with experimental results is obtained. Estimates of total line and continuum radiation from the oxygen impurity are given. It is shown that impurity radiation represents a considerable energy loss.
    Keywords: PLASMA PHYSICS
    Type: Journal of Quantitative Spectroscopy and Radiative Transfer; 17; Mar. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Laboratory observations of RF emission at plasma electron frequency and n + 1/2 times the electron cyclotron frequency in electron beam-plasma and beam-beam interactions (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Electric field emissions at frequencies of (n + 1/2) times the electron cyclotron frequency have been generated in a large-scale electron beam experiment in a vacuum facility. These emissions arise when a contrastreaming beam configuration exists, the primary beam consisting of monoenergetic electrons (50 eV to 5 keV) and the other beam of lower-energy backscattered secondary electrons. It is suggested that the same mechanism could also be the source of the observed 3/2 times the electron cyclotron frequency emissions at auroral latitudes. In the absence of the beam-beam instability, weak oscillations were observed at the plasma frequency. In the latter case no significant modifications of the primary beam velocity distribution occurred, and the beam configuration is adequately described by single-particle motion in the ambient magnetic field.
    Keywords: PLASMA PHYSICS
    Type: Journal of Geophysical Research; 80; Nov. 1
    Format: text
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  • 5
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    The Stark broadening mechanism in an unstable plasma (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The electron beam - driven instability of a plasma is considered, with particular emphasis on the turbulent electric fields excited by the beam. The Stark broadening in the plasma lines, due to such fields, is estimated. The broadening of H Beta lines in a 10,000 K plasma is used as an example. It is shown that it is possible to have appreciable Stark broadening at plasma densities much lower than normally predicted.
    Keywords: PLASMA PHYSICS
    Type: Solar Physics; 43; July 197
    Format: text
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  • 6
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    Space solar power - The transportation challenge (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The status of space transportation systems analyses referable to the SPS (solar power satellite) is reviewed briefly. Propulsion systems (including magnetoplasmadynamic) and booster arrangements for the SPS mission and variants in recovery arrangements (including winged recovery) are summarized, along with proposals for production of SPS components in space from lunar and asteroidal materials. Transportation of the pilot plant into low circumterrestrial orbit or high geosynchronous orbit, transfers between those orbits, and construction of a large work bench structure (orbital construction demonstration article - OCDA) in low earth orbit are discussed.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: AIAA PAPER 77-529 , Conference on Space Manufacturing Facilities; May 09, 1977 - May 12, 1977; Princeton, NJ; US
    Format: text
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  • 7
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    Solar power satellite (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The solar power satellite (SPS) concept, under evaluation by NASA since 1974, is discussed. A typical system providing a total of 10,000 MW of electrical power to the ground receiving stations is considered. Energy conversion systems, including the photovoltaic device category using single-crystal silicon cells, are taken into account, as are the 2.45-GHz microwave power-transmission link and the ground receiver (or rectenna). Concepts involving space construction of the satellite's large structures (5 x 25 km) are described, noting that a process similar to the familiar roll-forming of light sheet metal parts has been adapted to the space environment. Transportation vehicles are discussed, including the Space Shuttle planned to reach 60 flights per year by the mid 1980's. Electrical power forecasts and advanced systems cost projections are analyzed, together with a description of costs estimates. The indirect economics of energy research and development, and the present NASA/DOE SPS program are noted.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: American Institute of Chemical Engineers, Annual Meeting; Nov 13, 1978; Miami Beach, FL
    Format: text
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  • 8
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    Transportation options for solar power satellites (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Advantages of solar power satellites compared to ground-based solar power installations are related to an almost continuous exposure to sunlight and to a much smaller collector area. An investigation of the transportation cost problem is conducted. Transportation systems based on presently understood technology are considered for the deployment of solar power satellites at potentially competitive costs. It is found that the cost of placement in a geosynchronous orbit is reducible to the range from $500 to $1000/kW. Approaches for achieving dramatic cost reductions are discussed.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: Conference on Intersociety Energy Conversion Engineering; Sep 12, 1976 - Sep 17, 1976; State Line, NV
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Improved space radiation shielding methods (1976)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The computing software that was used to perform the charged particle radiation transport analysis and shielding design for the Mariner Jupiter/Saturn 1977 spacecraft is described. Electron fluences, energy spectra and dose rates obtained with this software are presented and compared with independent computer calculations.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA-CR-146581 , JPL-TM-33-765 , Winter Meeting of Am. Nucl. Soc.; Nov 16, 1975 - Nov 21, 1975; San Francisco, CA; United States
    Format: application/pdf
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  • 10
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    Solar power satellite system definition study. Part 2, volume 5: Space operations (construction and transportation) (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Construction and transportation systems and operations are described for the following combinations: (1) silicon photovoltaic CR=1 satellite constructed primarily in low earth orbit (LEO); (2) silicon photovoltaic CR=1 satellite constructed in geosynchronous earth orbit (GEO); (3) Rankine thermal engine satellite constructed primarily in LEO; and (4) Rankine thermal engine satellite constructed in GEO.
    Keywords: LAUNCH VEHICLES AND SPACE VEHICLES
    Type: NASA-CR-151669 , D180-22876-5-PT-2-VOL-5
    Format: application/pdf
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