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  • AIRCRAFT PROPULSION AND POWER  (223)
  • SPACE RADIATION
  • 1975-1979  (360)
  • 1
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    Prediction of energetic particle disturbances (1979)
    In:  CASI
    Details
    Publication Date: 2006-01-16
    Description: The prediction of fluxes of energetic particles of solar or magnetospheric origin is addressed. Topics include the prediction of the properties of the particle populations generated by magnetospheric storms and substorms, and the prediction of long term variations in the populations of magnetospheric particles.
    Keywords: SPACE RADIATION
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 415-432
    Format: text
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  • 2
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    The possibility of using superconductive systems in the analysis of the composition of cosmic rays (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The experimental results on the use of superconductive systems onboard of spacecraft are described. To ensure low temperatures in the cryostat under weightlessness, helium was used at a pressure above the critical pressure. In flight, the temperature was controlled at six points, while the pressure and intensity of the magnetic field were controlled in the solenoids. The methodical test proved it possible to mount special installations on satellites, with extensive magnetic fields based on superconductive alloys, and particularly, low weights and low power consumption magnetic analyzers.
    Keywords: SPACE RADIATION
    Type: Cosmic Rays (; p 256-260
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  • 3
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    Cosmic ray antiproton and positron production in the interstellar medium (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: We have calculated the energy spectra of cosmic ray secondary antiprotons and positrons using the latest available data on inclusive reactions. Using the measured positron spectrum, we have found that the amount of matter traversed by the cosmic rays in the few GeV region to be 4.7 (+ or - 1.5) g/sq cm of interstellar hydrogen. The computed antiproton to proton ratio is about .0004 for energies 5-10 GeV. This is sufficient to make observations of antiprotons feasible from balloon flights. We have also pointed out the type of information that can be obtained if accurate information of the spectra of these two components becomes available.
    Keywords: SPACE RADIATION
    Type: Astrophysics and Space Science; 37; Oct. 197
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  • 4
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    A search for gamma-ray spectral lines from the Galactic Center by HEAO-1 (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Preliminary results are reported for a search by HEAO 1 for gamma-ray lines from the Galactic Center in the energy range from 1.5 to 8 MeV. The hard X-ray/low-energy gamma-ray instrument aboard HEAO 1 is briefly described, and results are examined which indicate no obvious statistically significant spectral lines from the Galactic Center. It is concluded that the present observations fail to confirm the previously reported 4.4-MeV flux from the Galactic Center but that the existence of the reported 4.4-MeV feature cannot be strongly rejected on the basis of these results.
    Keywords: SPACE RADIATION
    Type: X-ray astronomy; May 29, 1978 - Jun 10, 1978; Innsbruck; Austria
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  • 5
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    Full scale upper surface blown flap noise (1975)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A highly noise suppressed TF 34 engine was used to investigate the noise of several powered lift configurations involving upper surface blown (USB) flaps. The configuration variables were nozzle type (i.e. slot and circular with deflector), flap chord length, and flap angle. The results of velocity surveys at both the nozzle exit and the flap trailing edge are also presented and used for correlation of the noise data. Configurations using a long flap design were 4 db quieter than a short flap typical of current trends in USB flap design. The lower noise for the long flap is attributed primarily to the greater velocity decay of the jet at the flap trailing edge. The full-scale data revealed substantially more quadrupole noise in the region near the deflected jet than observed in previous sub-scale tests.
    Keywords: AIRCRAFT PROPULSION AND POWER
    Type: NASA-TM-X-71708 , E-8322 , Natl. Air Transportation Meeting; May 06, 1975 - May 08, 1975; Hartford, CT; United States
    Format: application/pdf
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  • 6
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    Crystal activation experiment MA-151 (1976)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: The crystal activation experiment consisted of two sample packages that were flown in the command module and returned to earth for analysis of the radioactivity induced in them during the flight. The objective of the experiment was to define the background caused by detector activation that interferes when gamma radiation is measured in the 0.02- to 10-megaelectronvolt range from earth orbit. Preliminary results show that the activation of the NaI(Tl) crystal was a factor of 3 below that from a similar measurement on Apollo 17. The identification of certain species and the level of activation observed show an important contribution from the interactions of thermal and energetic neutrons produced as secondaries in the spacecraft. That the activation was reduced by only a factor of 3 compared with the Apollo 17 experiment, despite the geomagnetically shielded orbit, possibly indicates more efficient secondary neutron production by the more energetic cosmic rays.
    Keywords: SPACE RADIATION
    Type: Apollo-Soyuz Test Project; 10 p
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  • 7
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    The cosmic-ray antiproton flux - An upper limit near that predicted for secondary production (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Data gathered from a balloon flight of a superconducting-magnet spectrometer have been examined for the presence of cosmic-ray antiprotons. The ratio of antiprotons to protons, p(-)/p, in cosmic rays was found to be (0.03 + or - 3.3) ten-thousandths in the rigidity interval from 4.2 to 12.5 GV. The 95%-confidence-level upper limit for p(-)/p is thus 0.00066. This upper limit is in strong contradiction to the prediction of the closed-galaxy model of Rasmussen and Peters (1975), but is not inconsistent with the prediction of the modified closed-galaxy model of Peters and Westergaard (1977). It is nearly equal to the predictions of conventional propagation models. This result provides an independent confirmation of the absence of primary antimatter in the cosmic rays at a level of approximately a few ten-thousandths.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; vol. 217
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  • 8
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    Study of cosmic ray motion in cosmic space near the earth (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Data are presented on experimental installations developed in the cosmic ray variations laboratory in Kazgu (Alma-Ata). Various experiments on modelling the interaction of plasma with the geomagnetic field as well as the plasma distribution in quiet and disturbed fields are described. The characteristics of the meson supertelescope using scintillators (effective area, 10 sq m) for vertical alignments designed to study microvariations of the cosmic rays and their interrelation with magnetospheric fluctuations and the study of solar wind parameters are given.
    Keywords: SPACE RADIATION
    Type: Cosmic Rays (NASA-TT-F-807); p 372-379
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  • 9
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    The study of cosmic rays on the proton artificial earth satellite (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Investigations were carried out with the space stations of the Proton series to study the physics of cosmic rays. The SEZ-13 device for the search of particles with a fractional electrical charge and the SEZ-11 device for the measurement of high energy electrons were mounted on the Proton-3 satellite. The mode of action of the SEZ-11 device differed from that of the SEZ-12 device used in the Proton-1 and Proton-2 satellites for similar purposes. Some of the results that were obtained are presented.
    Keywords: SPACE RADIATION
    Type: Cosmic Rays (; p 227-246
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  • 10
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    A study of cosmic rays on the artificial moon satellites Luna-11 and Luna-12 (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: In the period from the end of August 1966 to January 1967 the primary cosmic radiation fluxes beyond the terrestrial magnetosphere were measured by means of the equipment mounted on the satellites Luna-11 and Luna-12. The altitude dependence of cosmic rays near the lunar surface as well as the intensity of protons and electrons of solar origin in the moon's vicinity were determined. The correlation of proton intensity with the parameters characterizing the solar and geomagnetic activities and the specific features of the angular distribution of the proton flux as revealed during measurements are given. Data on electron fluxes studied on September 1 and 8, 1966, when short term increases in the electron intensity were observed are included.
    Keywords: SPACE RADIATION
    Type: Cosmic Rays (; p 206-226
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