Preliminary results from the heavy ions in space experiment

Details Preliminary results from the heavy ions in space experiment Preliminary results from the heavy ions in space experiment

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ldef.symp..377a&link_type=abstract

In NASA. Langley Research Center, LDEF: 69 Months in Space. First Post-Retrieval Symposium, Part 1 p 377-391 (SEE N92-23280 14-9

Astronomy and Astrophysics

Astrophysics

Extraterrestrial Radiation, Galactic Cosmic Rays, Heavy Ions, Ionizing Radiation, Long Duration Exposure Facility, Microelectronics, Radiation Effects, Spaceborne Experiments, Anomalies, Atomic Structure, Chemical Composition, Electrons, Geomagnetism, Interplanetary Space, Spacecraft Components

Scientific paper

The Heavy Ions In Space (HIIS) experiment has two primary objectives: (1) to measure the elemental composition of ultraheavy galactic cosmic rays, beginning in the tin-barium region of the periodic table; and (2) to study heavy ions which arrive at LDEF below the geomagnetic cutoff, either because they are not fully stripped of electrons or because their source is within the magnetosphere. Both of these objectives have practical as well as astrophysical consequences. In particular, the high atomic number of the ultraheavy galactic cosmic rays puts them among the most intensely ionizing particles in Nature. They are therefore capable of upsetting electronic components normally considered immune to such effects. The below cutoff heavy ions are intensely ionizing because of their low velocity. They can be a significant source of microelectronic anomalies in low inclination orbits, where Earth's magnetic field protects satellites from most particles from interplanetary space. The HIIS results will lead to significantly improved estimates of the intensely ionizing radiation environment.

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