Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3655201
Keywords
filamentation instability; glow discharges; plasma diagnostics; plasma solitons
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Funding
- National Natural Science Foundation [10875048, 51077063]
- Research Fund for the Doctoral Program of Higher Education of China [20100142110005]
- Ministry of Education, People's Republic of China
- Australian Research Council
- CSIRO
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Nanosecond dynamics of two separated discharge cycles in an asymmetric dielectric barrier discharge is studied using time-resolved current and voltage measurements synchronized with high-speed (similar to 5 ns) optical imaging. Nanosecond dc pulses with tailored raise and fall times are used to generate solitary filamentary structures (SFSs) during the first cycle and a uniform glow during the second. The SFSs feature similar to 1.5 mm thickness, similar to 1.9 A peak current, and a lifetime of several hundred nanoseconds, at least an order of magnitude larger than in common microdischarges. This can be used in alternating localized and uniform high-current plasma treatments in various applications. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3655201]
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