Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985iraj...17...40o&link_type=abstract
Irish Astronomical Journal (ISSN 0021-1052), vol. 17, March 1985, p. 40-47.
Astronomy and Astrophysics
Astronomy
Galactic Cosmic Rays, Long Duration Exposure Facility, Challenger (Orbiter), Energy Spectra, Heao 3, Nuclear Fusion, Radiation Detectors
Scientific paper
The cosmic-ray experiment flown on the Long Duration Exposure Facility (LDEF) launched by the Space Shuttle in April 1984 to a circular 250-n.m. 28.5-deg-inclination orbit for a 1-yr mission is characterized and illustrated with photographs, drawings, and graphs. The experiment comprises a set of 16 multiple-layer (polycarbonate/lead) nuclear-track-detector trays occupying 20 sq m of the 100-sq-m LDEF exposure area and is designed to measure the relative abundances of nuclei with Z greater than 65 in cosmic radiation and hence to investigate the processes involved in the synthesis and acceleration of cosmic rays in the Galaxy. The range of heavy-nucleus cosmic-ray experiments prior to LDEF is indicated; the LDEF recovery and analysis procedures are explained; the temperature-dependence of track-detector response is discussed; and plans for a second flight of LDEF with a larger detector area (50 sq m), a 55-deg-inclination orbit, and a 2-yr exposure are outlined.
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