作者: Andre´ Anders,
期刊: Applied Physics Letters (AIP Available online 1998) 卷期: Volume 73, issue 22
页码: 3199-3201
ISSN:0003-6951
年代: 1998
DOI:10.1063/1.122717
出版商: AIP
数据来源: AIP
摘要:
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.
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