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30 Nov 1998

Volume 73, Issue 22, pp. 3181-3305

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Interaction of vacuum-arc-generated macroparticles with a liquid surface

André Anders

Appl. Phys. Lett. 73, 3199 (1998); http://dx.doi.org/10.1063/1.122717 (3 pages) | Cited 3 times

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The concept of trapping vacuum-arc-generated macroparticles by a liquid is introduced. Experiments have been performed using a pulsed vacuum arc plasma source operating with a carbon cathode. Vacuum pump oil was used as the trapping liquid in vacuum. It was experimentally shown that trapping did not work as anticipated: a substantial number of particles experienced elastic reflection from the liquid surface. With simplified energy and momentum balances it is shown that the liquid behaves increasingly like a solid when the approaching particle is fast. A significant portion of its kinetic energy is transformed into deformation energy which can reappear as kinetic energy of the reflected particle. Particle reflection is likely to be additionally supported by a Leidenfrost-type effect: a thin oil vapor layer of relatively high pressure can be formed between the liquid surface and the macroparticle caused by the macroparticle’s high temperature. © 1998 American Institute of Physics.
Show PACS
68.03.Fg Evaporation and condensation of liquids
61.46.-w Structure of nanoscale materials
79.20.Rf Atomic, molecular, and ion beam impact and interactions with surfaces
52.50.Dg Plasma sources
52.25.Vy Impurities in plasmas
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