Interaction of Dust Particles with Electrons and Ions

  • S. Pintér
  • J. Svestka
  • E. Grün
Conference paper
Part of the Astrophysics and Space Science Library book series (ASSL, volume 165)


Submicron sized dust particles (SiO2 and tungsten) were levitated in an electrodynamic quadrupole field and charged by ions and electrons. The electric particle surface potential is limited, when charged with ions, at field strength of approx. 1×109 V/m by a temperature dependent discharge mechanism. The particle interaction with 2 to 20 keV electrons always leads to positive surface potentials. The particle potential is determined by the absorption i.e. transmission and backscattering of electrons and by the secondary electrons emission. The dependences of the surface potentials and of the absorption on the electron energy were measured.


Dust Particle Glass Particle Field Ionization Tungsten Particle Secondary Electron Emission 
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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • S. Pintér
    • 1
  • J. Svestka
    • 2
  • E. Grün
    • 1
  1. 1.Max-Planck-Institut für KernphysikHeidelbergGermany
  2. 2.Prague ObservatoryCzechoslovakia

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