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Conductivity tensor for anisotropic plasma in gyrokinetic theory

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4983318· OSTI ID:1367353
 [1];  [2]
  1. Princeton Univ., Princeton, NJ (United States). Princeton Plasma, Physics Lab.
  2. Princeton Univ., Princeton, NJ (United States). Princeton Plasma, Physics Lab.; Andrews Univ., Berrien Springs, MI (United States)

Comprehensive non-invasive spectroscopic techniques and electrical measurements of the carbon arc revealed two distinguishable plasma synthesis regions in the radial direction normal to the arc axis. These regions, which are defined as the arc core and the arc periphery, are shown to have very different compositions of carbon species with different densities and temperatures. The colder arc periphery is dominated by carbon diatomic molecules (C-2), which are in the minority in the composition of the hot arc core. These differences are due to a highly non-uniform distribution of the arc current, which is mainly conducted through the arc core populated with carbon atoms and ions. Therefore, the ablation of the graphite anode is governed by the arc core, while the formation of carbon molecules occurs in the colder arc periphery. This result is consistent with previous predictions that the plasma environment in the arc periphery is suitable for synthesis of carbon nanotubes.

Research Organization:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Grant/Contract Number:
AC02-09CH11466
OSTI ID:
1367353
Alternate ID(s):
OSTI ID: 1361888
Report Number(s):
PPPL--5368
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 24; ISSN PHPAEN; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Astrophysical gyrokinetics: turbulence in pressure-anisotropic plasmas at ion scales and beyond journal April 2018

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