Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 49, Issue 34, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/49/34/345201
Keywords
plasma instabilities; arc discharge; arc instabilities; atmospheric pressure arc; nano materials; nanotubes; arc synthesis
Categories
Funding
- US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
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A short carbon arc operating with a high ablation rate of the graphite anode exhibits a combined motion of the arc and the arc attachment to the anode. A characteristic time scale of this motion is in a 10(-3) s range. The arc exhibits a negative differential resistance before the arc motion occurs. Thermal processes in the arc plasma region interacting with the ablating anode are considered as possible causes of this unstable arc behavior. It is also hypothesized that the arc motion could potentially cause mixing of the various nanoparticles synthesized in the arc in the high ablation regime.
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