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  • 1
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    Upper limits to the quiet-time solar neutron flux from 10 to 100 MeV (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The UCR large area solid-angle double scatter neutron telescope was flown to search for solar neutrons on 3 balloon flights on September 26, 1971, May 14, 1972 and September 19, 1972. The first two flights were launched from Palestine, Texas and the third from Cape Girardeau, Missouri. The float altitude on each flight was at about 5 g/sq cm residual atmosphere. Neutrons from 10 to 100 MeV were measured. No solar flares occurred during the flights. Upper limits to the quiet time solar neutron fluxes at the 95% confidence level are .00028, .00046, .00096 and .00090 neutrons/sq cm-sec in the energy intervals of 10-30, 30-50, 50-100 and 10-100 MeV, respectively.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-146331 , AD-A015672 , IGPP-UCR-75-15
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Large area double scattering telescope for balloon-borne studies of neutrons and gamma rays (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A large area double scattering telescope for balloon-borne research is described. It measures the flux, energy and direction of 2-100 MeV neutrons and 0.5-30 MeV gamma rays. These measurements are made using time-of-flight and pulse height analysis techniques with two large tanks of mineral oil liquid scintillator. Results from Monte Carlo calculations of the efficiency, energy resolution and angular resolution are presented and the electronics implementation for the processing of 80 photomultiplier tubes signals will be discussed. The detector weighs 800 kg with a large part of this weight being the liquid scintillator (320 kg). It will be flown at 3 mbars for flight durations up to 40 hours. The first flight is planned for Spring, 1975.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Unknown
    Upper limits to the quiet-time solar neutron flux from 10 to 100 MeV (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A large-area solid-angle double-scatter neutron telescope was flown to search for solar neutrons on three balloon flights in 1971 and 1972. The first two flights were launched from Palestine, Texas, and the third from Cape Girardeau, Missouri. The float altitude on each flight was at about 5 g/sq cm residual atmosphere. Neutrons from 10 to 100 MeV were measured. No solar flares occurred during the flights. Upper limits to the quiet-time solar neutron fluxes at the 95-per cent confidence level are 2.8, 4.6, 9.6, and 9.0 x 10 to the -4th power neutron/sq cm/sec in the energy intervals of 10-30, 30-50, 50-100, and 10-100 MeV, respectively.
    Keywords: SOLAR PHYSICS
    Type: Astrophysical Journal; 207; July 15
    Format: text
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    NASA TECHNICAL REPORTS
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