Computer Science
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1242..306l&link_type=abstract
PLASMAS IN THE LABORATORY AND THE UNIVERSE: Interactions, Patterns, and Turbulence. AIP Conference Proceedings, Volume 1242, pp
Computer Science
Plasma Turbulence, Plasma Density, Poisson Equation, Vortices, Plasma Turbulence, Thermodynamics Of Plasmas, Electrostatics, Poisson And Laplace Equations, Boundary-Value Problems, Plasma Vorticity
Scientific paper
The free-decaying two-dimensional (2D) turbulence in a pure electron plasma confined in the Malmberg-Penning trap ELTRAP is investigated experimentally and analyzed through the Proper Orthogonal Decomposition (POD). POD is used to extract coherent structures of the flow from a sequence of plasma density measurements, which represent the vorticity of the 2D fluid. The coherent structures that are energetically dominant are identified and their spatio-temporal dynamics is studied over the time evolution of turbulence. The results suggests the the dominant POD modes can be identified with diocotron modes which appear to be active during both the onset and relaxation phases of turbulence.
Carbone Vincenzo
Lepreti Fabio
Maero Giancarlo
Paroli B.
Pozzoli Roberto
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