The ion-composition of the plasma produced by impacts of fast dust particles
作者： B-K Dalmann , E Grün , J Kissel , H Dietzel , None
DOI: 10.1016/0032-0633(77)90017-4
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摘要: Abstract The composition of the impact plasma produced by fast dust particles (v > 1 km/sec) hitting an Au or W target was measured both with a model HELIOS micrometeoroid experiment (low electric field at target) and high detector. total charge depend strongly on velocity strength target. Spectra 9 different projectile-target combinations were analysed. Two types spectra could be observed, depending projectile material. (1) metals hard dielectrics (Mohs' hardness ⩾ 5). Particle constituents low ionisation energy (e · u 7eV, e.g. Na, K, Al) dominate these materials velocities below 10 km/sec. At higher speed relative intensities change new ions energies appear. (2) soft
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