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  • SPACECRAFT PROPULSION AND POWER  (3)
  • LASERS AND MASERS  (2)
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  • 1
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    Lasers from fission (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: The feasibility of the nuclear pumping of lasers was demonstrated in three experiments conducted independently at three different laboratories. In this context nuclear pumping of lasers is understood to be the excitation of a laser by the kinetic energy of the fission fragments only. A description is given of research concerned with the use of nuclear energy for the excitation of gas lasers. Experimental work was supplemented by theoretical research. Attention is given to a nuclear pumped He-Xe laser, a nuclear pumped CO laser, and a neon-nitrogen laser pumped by alpha particles. Studies involving uranium hexafluoride admixture to laser media are discussed along with research on uranium hexafluoride-fueled reactors.
    Keywords: LASERS AND MASERS
    Type: IAF PAPER 75-015 , International Astronautical Federation, International Astronautical Congress; Sept. 21-27, 1975; Lisbon; Portugal
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Physics and potentials of fissioning plasmas for space power and propulsion (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Fissioning uranium plasmas are the nuclear fuel in conceptual high-temperature gaseous-core reactors for advanced rocket propulsion in space. A gaseous-core nuclear rocket would be a thermal reactor in which an enriched uranium plasma at about 10,000 K is confined in a reflector-moderator cavity where it is nuclear critical and transfers its fission power to a confining propellant flow for the production of thrust at a specific impulse up to 5000 sec. With a thrust-to-engine weight ratio approaching unity, the gaseous-core nuclear rocket could provide for propulsion capabilities needed for manned missions to the nearby planets and for economical cislunar ferry services. Fueled with enriched uranium hexafluoride and operated at temperatures lower than needed for propulsion, the gaseous-core reactor scheme also offers significant benefits in applications for space and terrestrial power. They include high-efficiency power generation at low specific mass, the burnup of certain fission products and actinides, the breeding of U-233 from thorium with short doubling times, and improved convenience of fuel handling and processing in the gaseous phase.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Acta Astronautica; 3; July-Aug
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Physics and potentials of fissioning plasmas for space power and propulsion (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: A brief description of two gas core reactor concepts devised for propulsion applications is presented and recent research on the emission of radiation from nonequilibrium fissioning gases is considered. The principles of UF6 and plasma core reactor experiments are discussed. It is expected that the program of nuclear gas core reactor experiments can lead in several years to reactor operation at pressures, temperatures, and power levels of technological significance to terrestrial applications.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IAF PAPER 74-087
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Gaseous-fuel nuclear reactor research for multimegawatt power in space (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: In the gaseous-fuel reactor concept, the fissile material is contained in a moderator-reflector cavity and exists in the form of a flowing gas or plasma separated from the cavity walls by means of fluid mechanical forces. Temperatures in excess of structural limitations are possible for low-specific-mass power and high-specific-impulse propulsion in space. Experiments have been conducted with a canister filled with enriched UF6 inserted into a beryllium-reflected cavity. A theoretically predicted critical mass of 6 kg was measured. The UF6 was also circulated through this cavity, demonstrating stable reactor operation with the fuel in motion. Because the flowing gaseous fuel can be continuously processed, the radioactive waste in this type of reactor can be kept small. Another potential of fissioning gases is the possibility of converting the kinetic energy of fission fragments directly into coherent electromagnetic radiation, the nuclear pumping of lasers. Numerous nuclear laser experiments indicate the possibility of transmitting power in space directly from fission energy. The estimated specific mass of a multimegawatt gaseous-fuel reactor power system is from 1 to 5 kg/kW while the companion laser-power receiver station would be much lower in specific mass.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IAF PAPER 77-140
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Nuclear pumped gas laser research (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Nuclear pumping of lasers by fission-fragments from nuclear chain reactions is discussed. Application of the newly developed lasers to spacecraft propulsion or onboard power, to lunar bases for industrial processing, and to earth for utilization of power without pollution and hazards is envisioned. Emphasis is placed on the process by which the fission-fragement kinetic energy is converted into laser light.
    Keywords: LASERS AND MASERS
    Type: 2d NASA Conf. on Laser Energy Conversion; p 127-132
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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