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  • SPACE RADIATION  (726)
  • 1970-1974  (726)
  • 1974  (355)
  • 1971  (371)
  • 1
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    Solar electromagnetic radiation - Space vehicle design criteria /environment/ (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Values for solar constant and solar spectral irradiance based on air and spaceborne observations for use in design of spacecraft, space vehicles, subsystems, and experiments
    Keywords: SPACE RADIATION
    Type: NASA-SP-8005-REV
    Format: application/pdf
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  • 2
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    Internal Structure of the Geomagnetic Neutral Sheet (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Models for internal structure of geomagnetic tail neutral sheet deduced from Explorer 34 magnetic data
    Keywords: SPACE RADIATION
    Type: NASA-TM-X-67153
    Format: application/pdf
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  • 3
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    The X-ray corona and the photospheric magnetic field. (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Soft X-ray photographs of the solar corona have been obtained on four flights of a rocket-borne grazing incidence telescope having a resolution of a few arc sec. The configuration of the X-ray emitting structures in the corona has been compared to the magnetic field distribution measured by photospheric longitudinal magnetograms. The X-ray structures trace the three-dimensional configuration of the magnetic field through the lower corona. Active regions in the corona take the form of tubular structures connecting regions of opposite magnetic polarity within the same or adjacent chromospheric active regions. Higher, larger structures link widely separated active regions into complexes of activity covering substantial fractions of the disk. The complexes are separated by areas of low average field in the photosphere. Interconnections across the solar equator appear to originate over areas of preceding polarity.
    Keywords: SPACE RADIATION
    Format: text
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  • 4
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    Neutron and proton activation measurements from Skylab (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Radioactivity induced by high-energy protons and secondary neutrons (from nuclear interactions) in various samples returned from different locations in Skylab was measured directly by gamma-ray spectroscopy measurements of decay gamma rays from the samples. Incident fluxes were derived from the activation measurements, using known nuclear cross-section. Neutron and proton flux values were found to range from 0.2 to 5 particles/sq cm-sec, depending on the energy range and location in Skylab. The thermal neutron flux was less than 0.07 neutrons/sq cm-sec. The results are useful for data analysis and planning of future high-energy astronomy experiments.
    Keywords: SPACE RADIATION
    Type: AIAA PAPER 74-1227
    Format: text
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  • 5
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    Proton fluxes upstream from the earth's bow shock (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Keywords: SPACE RADIATION
    Type: Correlated interplanetary and magnetospheric observations; Seventh ESLAB Symposium; May 22, 1973 - May 25, 1973; Saulgau
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  • 6
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    Search for gamma ray lines from supernovae and supernova remnants (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A gamma ray monitor with a NaI crystal shielded with a cup-shaped CsI cover was contained in the rotating wheel compartment of the OSO-7 spacecraft for measuring the gamma ray spectra from 0.3 to 10 MeV in search for gamma ray lines from a possible remnant in the Gum Nebula and the apparent Type I supernovae in NGC5253. A brief analysis of data yielded no positive indications for X-rays, gamma ray lines, or continuum from these sources.
    Keywords: SPACE RADIATION
    Type: International Conference on Supernovae and Supernova Remnants; May 07, 1973 - May 11, 1973; Lecce; Italy
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  • 7
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    High energy galactic gamma radiation from cosmic rays concentrated in spiral arms (1974)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A model for the emission of high energy ( 100 MeV) gamma rays from the galactic disk was developed and compared to recent SAS-2 observations. In the calculation, it is assumed that (1) the high energy galactic gamma rays result primarily from the interaction of cosmic rays with galactic matter; (2) on the basis of theoretical and experimental arguments the cosmic ray density is proportional to the matter density on the scale of galactic arms; and (3) the matter in the galaxy, atomic and molecular, is distributed in a spiral pattern consistent with density wave theory and the experimental data on the matter distribution.
    Keywords: SPACE RADIATION
    Type: NASA-TM-X-70818 , X-662-75-2 , High energy galactic gamma radiation from commic rays concentrated in spiral arms; Dec 01, 1974; Greenbelt, MD; United States
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  • 8
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    Search for celestial X-ray bursts (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Progress in two experimental programs is reported. One program involves the search through satellite data for existing evidence for fast photon intensity bursts with energies exceeding 80 keV. The second program is concerned with the development of very sensitive instrumentation to make possible studies of X-ray and gamma ray bursts in the region from 0.1 to 15 MeV with angular resolution, energy resolution, and time resolution, taking into account the complete dynamic range from several nanoseconds to several hours.
    Keywords: SPACE RADIATION
    Type: International Conference on Supernovae and Supernova Remnants; May 07, 1973 - May 11, 1973; Lecce; Italy
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  • 9
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    Determination of the radial gradient in the region 0.81-1.0 AU using both high- and low-energy /more than 10-GeV and more than 52-MeV/ detectors for the 1-AU monitor (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A determination of the radial gradient for alpha particles (31-46 MeV/nuc) and protons with energies above 7.5 MeV and 44-77 MeV in the region 1.0-0.81 AU is presented for the solar-quiet year 1966. The determinations are based on data from the Pioneer 6 space probe. Two different detectors are used: the Deep River neutron monitor and measurements of low energy protons made on the IMP-C satellite. The average energy response of the Deep River monitor is 16 GeV, whereas the IMP-C data is for protons with energies above 50 MeV. The resulting radial gradient is found to be nearly zero for the alpha particles and slightly negative for the protons. The same qualitative results were found using the IMP-C data and the Deep River neutron monitor to measure the temporal variation in the cosmic ray intensity. The present analysis indicates that detectors over a wide range of energies are suitable for measuring the radial gradient, providing sufficient statistical precision is obtained to evaluate short-term modulation and the azimuthal separation of the detectors is not great.
    Keywords: SPACE RADIATION
    Type: International Symposium on Solar-Terrestrial Physics; Jun 17, 1974 - Jun 22, 1974; Sao Paulo; Brazil
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  • 10
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    Simulation of pitch angle diffusion of charged particles in a disordered magnetic field (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Results are reported for computer simulation experiments in which a statistical ensemble of random magnetic field realizations is generated, orbits of charged particles in the random fields are followed, and a pitch-angle diffusion coefficient is derived from the temporal evolution of the orbits. Diffusion coefficients predicted by three nonlinear theories are compared with the derived coefficients for the standard quasilinear theory of velocity diffusion, and the goals of future simulations are outlined.
    Keywords: SPACE RADIATION
    Type: Solar wind three; Third Conference; Mar 25, 1974 - Mar 29, 1974; Pacific Grove, CA
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