Other
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ldef.symp...32m&link_type=abstract
In NASA. Langley Research Center, Second LDEF Post-Retrieval Symposium Abstracts p 32 (SEE N92-27218 18-99)
Other
Chemical Analysis, Hypervelocity Impact, Long Duration Exposure Facility, Micrometeoroids, Microparticles, Space Debris, Craters, Dust, Foils (Materials), Fragmentation, Glass, Impactors, Residues, Size Distribution, Thick Plates
Scientific paper
Part of the LDEF tray allocated to French Experiments (FRECOPA) was devoted to the study of dust particles. The tray was located on the face of LDEF directly opposed to the velocity vector. Two passive experiments were flown: a set of glass and metallic samples; and multilayer thin foil detectors. Crater size distribution made possible the evaluation of the incident microparticle flux in the near environment. Comparisons are made with measurements obtained on the other faces of LDEF and with results from similar experiments on the MIR. Of interest was the study of impact features on stacked thin foil detectors. The top foil acted as a shield, fragmenting the projectiles and spreading the fragments over the surface of the thick plate located underneath. EDS analysis has provided evidence of impactor fragments. Detectors consisting of a thin shield and thick bottom plate appear to offer a significantly higher return of data concerning chemical analysis of impactor residues than single plate detectors. The samples of various materials offer a unique opportunity for the study of the many processes involved upon hypervelocity impact phenomena.
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