Coherent structures in two-dimensional plasma turbulence

T. Huld; A.H. Nielsen; H.L. Pécseli; J. Juul Rasmussen

doi:10.1063/1.859680

Coherent structures in two-dimensional plasma turbulence

T. Huld, A.H. Nielsen, H.L. Pécseli, J. Juul Rasmussen

Research output: Contribution to journal › Journal article › Research

Abstract

Low-frequency, flute-type electrostatic fluctuations propagating across a strong, homogeneous magnetic field are studied experimentally. The fluctuations are generated by the Kelvin-Helmholtz instability. The presence of relatively long-lived vortexlike structures in a background of wide-band turbulent fluctuations is demonstrated by a conditional sampling technique. Depending on plasma parameters, the dominant structures can appear as monopole or multipole vortices, dipole vortices in particular. The importance of large structures for the turbulent plasma diffusion is discussed. A statistical analysis of the randomly varying plasma flux is presented.

Original language	English
Journal	Physics of Fluids B: Plasma Physics
Volume	3
Issue number	7
Pages (from-to)	1609-1625
ISSN	0899-8221
DOIs	https://doi.org/10.1063/1.859680
Publication status	Published - 1991

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title = "Coherent structures in two-dimensional plasma turbulence",

abstract = "Low-frequency, flute-type electrostatic fluctuations propagating across a strong, homogeneous magnetic field are studied experimentally. The fluctuations are generated by the Kelvin-Helmholtz instability. The presence of relatively long-lived vortexlike structures in a background of wide-band turbulent fluctuations is demonstrated by a conditional sampling technique. Depending on plasma parameters, the dominant structures can appear as monopole or multipole vortices, dipole vortices in particular. The importance of large structures for the turbulent plasma diffusion is discussed. A statistical analysis of the randomly varying plasma flux is presented. ",

keywords = "Optik og fluid dynamik",

author = "T. Huld and A.H. Nielsen and H.L. P{\'e}cseli and {Juul Rasmussen}, J.",

year = "1991",

doi = "10.1063/1.859680",

language = "English",

volume = "3",

pages = "1609--1625",

journal = "Physics of Fluids B: Plasma Physics",

issn = "0899-8221",

publisher = "American Institute of Physics",

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T1 - Coherent structures in two-dimensional plasma turbulence

AU - Huld, T.

AU - Nielsen, A.H.

AU - Pécseli, H.L.

AU - Juul Rasmussen, J.

PY - 1991

Y1 - 1991

N2 - Low-frequency, flute-type electrostatic fluctuations propagating across a strong, homogeneous magnetic field are studied experimentally. The fluctuations are generated by the Kelvin-Helmholtz instability. The presence of relatively long-lived vortexlike structures in a background of wide-band turbulent fluctuations is demonstrated by a conditional sampling technique. Depending on plasma parameters, the dominant structures can appear as monopole or multipole vortices, dipole vortices in particular. The importance of large structures for the turbulent plasma diffusion is discussed. A statistical analysis of the randomly varying plasma flux is presented.

AB - Low-frequency, flute-type electrostatic fluctuations propagating across a strong, homogeneous magnetic field are studied experimentally. The fluctuations are generated by the Kelvin-Helmholtz instability. The presence of relatively long-lived vortexlike structures in a background of wide-band turbulent fluctuations is demonstrated by a conditional sampling technique. Depending on plasma parameters, the dominant structures can appear as monopole or multipole vortices, dipole vortices in particular. The importance of large structures for the turbulent plasma diffusion is discussed. A statistical analysis of the randomly varying plasma flux is presented.

KW - Optik og fluid dynamik

U2 - 10.1063/1.859680

DO - 10.1063/1.859680

M3 - Journal article

VL - 3

SP - 1609

EP - 1625

JO - Physics of Fluids B: Plasma Physics

JF - Physics of Fluids B: Plasma Physics

SN - 0899-8221

IS - 7

ER -