ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • Karten
  • Weitere Quellen  (1.298)
  • SPACE RADIATION  (1.298)
  • 1995-1999  (61)
  • 1985-1989  (1.237)
Sammlung
  • Karten
  • Weitere Quellen  (1.298)
Datenquelle
Schlagwörter
Erscheinungszeitraum
Jahr
  • 1
    facet.materialart.
    Unbekannt
    Nuclear fragmentation parameters needed for interpretation of observed fluxes of UH cosmic ray nuclei (1995)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: Any study of the origin of the UH nuclei in the cosmic rays requires that their observed abundances be propagated back to the source. This demands a knowledge of the interaction cross sections in the materials of the detectors, any local overlying matter, and the interstellar medium. New measurements of interaction probabilities of 10.6 GeV/n gold nuclei show significant differences from previous measurements made at less than 1.0 GeV/n nuclei. These differences are particularly marked for a hydrogen target. Hence, those cross sections previously measured at low energies should not be applied to cosmic ray observations made at energies greater than or = 2 GeV/n. Without a measurement of the energy dependence of these cross sections it will be difficult to make reliable propagation calculations, since the differences between measured and predicted cross sections are still at the 20 to 30% level.
    Schlagwort(e): SPACE RADIATION
    Materialart: Advances in Space Research (ISSN 0273-1177); 15; 6; p. (6)39-(6)48
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unbekannt
    Cosmic ray heavy ion penetration deep into the magnetosphere: Results from S81-1 and CRRES (1995)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: In spite of strong magnetic shielding by the geomagnetic field, small fractions (1-10 %) of the total high energy, heavy ion intensities of solar and galactic cosmic rays have been observed at energies below theoretical cutoffs for direct entry into the earth's magnetosphere from interplanetary space. We report on measurements of these heavy ions at 10 to 500 MeV/nucleon by cosmic ray composition experiments on the S81-1 satellite in polar orbit during 1982 and on the Combined Release and Radiation Effects Satellite (CRRES) satellite in geosynchronous transfer orbit during 1990-1991.
    Schlagwort(e): SPACE RADIATION
    Materialart: Advances in Space Research (ISSN 0273-1177); 15; 1; p. (1)61-(1)64
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unbekannt
    Below-cutoff ions in the heavy ions in space experiment (1995)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: In January 1990, the Long Duration Exposure Facility (LDEF) spacecraft was retrieved after nearly 6 years in space in a 28.4 deg orbit at a mean altitude of 476 km. Onboard LDEF was NRL's Heavy Ions In Space (HIIS) experiment, comprising large thick stacks of plastic track detectors with a total collecting power of 2.0 sq m-sr. We report preliminary results on the observation of stopping Fe-group ions at energies far below the geomagnetic cutoff for fully-ionized galactic cosmic rays.
    Schlagwort(e): SPACE RADIATION
    Materialart: Advances in Space Research (ISSN 0273-1177); 15; 1; p. (1)57-(1)60
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unbekannt
    LET spectra of trapped anomalous cosmic rays in low-Earth orbit (1996)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: Observations aboard Cosmos satelites discovered trapped anomalous cosmic rays (ACRs), tracked the variation in their intensity in 1986-1988, and measured their fluence, spectrum, and composition at solar minimum in the previous solar cycle. The MAST instrument aboard the SAMPEX satellite has observed trapped anomalous cosmic rays in the present solar cycle, confirmed the general features of the Cosmos data, and provided the first detailed observations of trapped ACRs. In this paper we apply theoretical modeling of trapped ACRs, which is shown to provide a reasonably good description of both the Cosmos and SAMPEX data, to calculate the integral linear-energy-transfer (LET) spectra due to trapped ACRs in typical low-Earth orbits. We compare these calculations with the LET spectra produced by galactic cosmic rays (GCRs) and non-trapped ACRs in order to assess the relative radiation hazard posed by trapped ACRs.
    Schlagwort(e): SPACE RADIATION
    Materialart: Advances in Space Research (ISSN 0273-1177); 17; 2; p. (2)47-(2)51
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unbekannt
    Comparison of distributed acceleration and standard models of cosmic-ray transport (1995)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: Recent cosmic-ray abundance measurements for elements in the range 3 less than or equal to Z less than or equal to 28 and energies 10 MeV/n less than or equal to E less than or equal to 1 TeV/n have been analyzed with computer transport modeling. About 500 elemental and isotopic measurements have been explored in this analysis. The transport code includes the effects of ionization losses, nuclear spallation reactions (including those of secondaries), all nuclear decay modes, stripping and attachment of electrons, escape from the Galaxy, weak reacceleration and solar modulation. Four models of reacceleration (with several submodels of various reacceleration strengths) were explored. A chi (exp 2) analysis show that the reacceleration models yield at least equally good fits to the data as the standard propagation model. However, with reacceleration, the ad hoc assumptions of the standard model regarding discontinuities in the energy dependence of the mean path length traversed by cosmic rays, and in the momentum spectrum of the cosmic-ray source spectrum are eliminated. Futhermore, the difficulty between rigidity dependent leakage and energy independent anisotropy below energies of 10(exp 14) eV is alleviated.
    Schlagwort(e): SPACE RADIATION
    Materialart: Advances in Space Research (ISSN 0273-1177); 15; 1; p. (1)65-(1)68
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unbekannt
    The recovery phase of galactic cosmic ray modulation in the outer heliosphere (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: Energetic hydrogen and helium nuclei from the galaxy (cosmic rays) enter the solar system with varying degrees of difficulty during the 11-year solar magnetic cycle, resulting in spatial and temporal variations of particle intensities in the heliosophere. Observations of these variations from the ISEE-3, Voyager 1 and 2, and Pioneer 10 spacecraft during the period from early 1981 to early 1986 and for heliocentric distances ranging from 1 to 37 AU are reported. During this time the high energy intensities in the outer heliosphere have been increasing exponentially at a rate of approximately 20 percent/year with occasional interruptions due to enhanced solar activity. The radial intensity gradients measured in the ecliptic plane are observed to remain constant or to decrease at the time of the reversal of the solar magnetic poles in 1980.
    Schlagwort(e): SPACE RADIATION
    Materialart: Geophysical Research Letters (ISSN 0094-8276); 13; 785-788
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 7
    facet.materialart.
    Unbekannt
    Cosmic ray variations and turbulent flow systems - 0.3-1.0 AU; 1977-1980 (1986)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: Possible relationships among the cosmic ray intensity and magnetic fields and flows inside 1 AU are investigated using data gathered by instrumentation on the Helios 1 spacecraft during 1977-80. The data included nearly continuous simultaneous plasma and magnetic field measurements for periods of two months or more at heliocentric radii from 0.3-1 AU. Account was taken of fluctuations of the relative particle counting rates due to spacecraft motion. The passage of transient streams following solar wind shock waves was accompanied by Forbush decreases but not long term modulation. The extent and consistency of the data support a model of shell-like disturbances of diverse shapes and internal structures proceeding outward from the sun. Magnetic field fluctuation spectra (turbulence) calculated for the various types of flow observed permitted establishing power laws relationships between the variations observed and the frequency of the magnetic field. Transient flows were more turbulent than corotating flows. Turbulence was also present in mixed flows, possibly arising from shocks, and was usually confined to the spiral shaped structures of corotation.
    Schlagwort(e): SPACE RADIATION
    Materialart: Journal of Geophysical Research (ISSN 0148-0227); 91; 2917-292
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unbekannt
    Constraints on galaxy formation theories (1986)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The present theories of galaxy formation are reviewed. The relation between peculiar velocities, temperature fluctuations of the microwave background and the correlation function of galaxies point to the possibility that galaxies do not form uniformly everywhere. The velocity data provide strong constraints on the theories even in the case when light does not follow mass of the universe.
    Schlagwort(e): SPACE RADIATION
    Materialart: NASA. Goddard Space Flight Center Nineteenth International Cosmic Ray Conference. Conference Papers: Invited Rapporteur, Highlight, Miscellaneous, Volume 9; 11 p
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 9
    facet.materialart.
    Unbekannt
    The large scale dynamics of the outer heliosphere and the long-term modulation of galactic cosmic rays (1985)
    In:  CASI
    Details
    Publikationsdatum: 2019-08-28
    Beschreibung: The network of cosmic ray observatories reaching across the heliosphere has given new insight into the process of solar modulation, establishing that the decreases occur principally in the outer heliosphere and are produced by interplanetary flow systems; that the hysteresis effects appear to be produced by changes in the rigidity dependence of the diffusion coefficient and that the predicted effects on the cosmic ray gradients associated with the reversal of the solar magnetic field polarity are not observed.
    Schlagwort(e): SPACE RADIATION
    Materialart: SH-4.7-3 , 19th Intern. Cosmic Ray Conf - Vol. 5; p 193-196; NASA-CP-2376-VOL-5
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 10
    facet.materialart.
    Unbekannt
    Geomagnetic transmission disturbances and heavy-ion fluences observed in low Earth orbit during the solar energetic particle events of October 1989 (1996)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-08-27
    Beschreibung: The large solar energetic particle (SEP) events and simultaneous large geomagnetic disturbances observed during October 1989 posed a significant, rapidly evolving space radiation hazard. Using data from the GOES-7, NOAA-10, IMP-8 and LDEF satellites, we determined the geomagnetic transmission, heavy ion fluences, mean Fe ionic charge state, and effective radiation hazard observed in low Earth orbit (LEO) for these SEPs. We modeled the geomagneitc transmission by tracing particles through the combination to the internal International Geomagnetic Reference Field (IGRF) and the Tsyganenko (1989) magnetospheric field models, extending the modeling to large geomagnetic disturbances. We used our results to assess the radiation hazard such very large SEP events would pose in the anticipated 52 deg inclination space station orbit.
    Schlagwort(e): SPACE RADIATION
    Materialart: Advances in Space Research (ISSN 0273-1177); 17; 2; p. (2)121-(2)125
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...