title: Heavy ion results from different locations on LDEF.
abstract: Heavy ions (Z = 8-26) with energies far below the geomagnetic cutoff energy were measured in three different plastic nuclear track detector experiments on the 28.5 degrees inclination orbit of the NASA satellite Long Duration Exposure Facility (LDEF) at 460 km mean altitude. The results of the three experiments M0002 (Kiel University, Germany), A0015 (Deutsche Gesellschaft fur Luft- und Raumfahrt (= DLR) Koln, Germany) and HIIS (Naval Research Laboratory (= NRL) Washington, DC, U.S.A.), which were exposed at different satellite locations, agree with each other. At E < or = 70 MeV/nuc all particle groups showed a steeply falling energy spectrum and an anisotropic arrival direction distribution. The results were consistent with magnetically trapped particles registered in the South Atlantic. The detected particles originated from the anomalous cosmic rays (O, Ne, Ar) and from an unknown source (Mg, Si, Fe). At E > or = 70 MeV/nuc measured particles of the Fe-group showed a flattening energy spectrum.
authors.affiliation: Institut fur Kernphysik, Universitat Kiel, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Barz
authors.forename: T
authors.initials: T
authors.lastname: Kleis
authors.forename: R
authors.initials: R
authors.lastname: Beaujean
authors.forename: W
authors.initials: W
authors.lastname: Enge
mesh_terms: D016880:Anisotropy; D001128:Argon; D001267:Atlantic Ocean; D003359:Cosmic Radiation; D005118:Extraterrestrial Environment; D007477:Ions; D007501:Iron; D008274:Magnesium; D009356:Neon; D010100:Oxygen; D011834:Radiation Monitoring / Q000295:instrumentation*; D011874:Radiometry; D012825:Silicon; D019445:Solar Activity; D013020:South America; D013026:Space Flight; D018531:Spacecraft
chemical_list: D007477:Ions; D009356:Neon; D001128:Argon; D007501:Iron; D008274:Magnesium; D010100:Oxygen; D012825:Silicon