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Photo-ionization and residual electron effects in guided streamers (2014)

S. Wu, X. Lu, D. Liu, Y. Yang, Y. Pan and K. Ostrikov

American Institute of Physics (AIP)

In: Physics of Plasmas

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Publication Date: 2014-10-10

Description: Complementary experiments and numerical modeling reveal the important role of photo-ionization in the guided streamer propagation in helium-air gas mixtures. It is shown that the minimum electron concentration ∼10 8 cm −3 is required for the regular, repeated propagation of the plasma bullets, while the streamers propagate in the stochastic mode below this threshold. The stochastic-to-regular mode transition is related to the higher background electron density in front of the propagating streamers. These findings help improving control of guided streamer propagation in applications from health care to nanotechnology and improve understanding of generic pre-breakdown phenomena.

Print ISSN: 1070-664X

Electronic ISSN: 1089-7674

Topics: Physics

Published by American Institute of Physics (AIP)

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