Coherent vortical structures in two-dimensional plasma turbulence

H.L. Pécseli; E.A. Coutsias; T. Huld; Jens-Peter Lynov; A.H. Nielsen; J. Juul Rasmussen

doi:10.1088/0741-3335/34/13/041

Coherent vortical structures in two-dimensional plasma turbulence

H.L. Pécseli, E.A. Coutsias, T. Huld, Jens-Peter Lynov, A.H. Nielsen, J. Juul Rasmussen

Research output: Contribution to journal › Conference article › Research

Abstract

A laboratory experiment was carried out in order to study the nonlinear saturated stage of the cross-field electrostatic Kelvin-Helmholtz instability in a strongly magnetized plasma. The presence of large vortex-like structures in a background of wide-band turbulent fluctuations was demonstrated by a conditional sampling technique. The formation of the structures was interpreted in terms of an inverse cascade, i.e. as the combined result of small scale structures generated by the instability and a subsequent coalescence of small vortices into larger ones. This interpretation was supported by numerical simulations. The importance of the large scale structures for the turbulent plasma transport across magnetic field lines was analyzed in detail.

Original language	English
Article number	041
Journal	Plasma Physics and Controlled Fusion
Volume	34
Issue number	13
Pages (from-to)	2065-2070
ISSN	0741-3335
DOIs	https://doi.org/10.1088/0741-3335/34/13/041
Publication status	Published - Dec 1992
Event	9th Kiev International Conference on Plasma Theory; 9th International Conference on Waves and Instabilities in Plasmas; 19th EPS Conference on Controlled Fusion and Plasma Physics - Innsbruck, Austria Duration: 29 Jun 1992 → 3 Jul 1992

Conference

Conference	9th Kiev International Conference on Plasma Theory; 9th International Conference on Waves and Instabilities in Plasmas; 19th EPS Conference on Controlled Fusion and Plasma Physics
Country/Territory	Austria
City	Innsbruck
Period	29/06/1992 → 03/07/1992

Access to Document

10.1088/0741-3335/34/13/041

OpenUrl availability

Full text

Cite this

@inproceedings{3f61d44c74ef4884a2b46df39a2b7177,

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

abstract = "A laboratory experiment was carried out in order to study the nonlinear saturated stage of the cross-field electrostatic Kelvin-Helmholtz instability in a strongly magnetized plasma. The presence of large vortex-like structures in a background of wide-band turbulent fluctuations was demonstrated by a conditional sampling technique. The formation of the structures was interpreted in terms of an inverse cascade, i.e. as the combined result of small scale structures generated by the instability and a subsequent coalescence of small vortices into larger ones. This interpretation was supported by numerical simulations. The importance of the large scale structures for the turbulent plasma transport across magnetic field lines was analyzed in detail. ",

keywords = "Optik og fluid dynamik",

author = "H.L. P{\'e}cseli and E.A. Coutsias and T. Huld and Jens-Peter Lynov and A.H. Nielsen and {Juul Rasmussen}, J.",

year = "1992",

month = dec,

doi = "10.1088/0741-3335/34/13/041",

language = "English",

volume = "34",

pages = "2065--2070",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing",

number = "13",

note = "9th Kiev International Conference on Plasma Theory; 9th International Conference on Waves and Instabilities in Plasmas; 19th EPS Conference on Controlled Fusion and Plasma Physics ; Conference date: 29-06-1992 Through 03-07-1992",

}

TY - GEN

T1 - Coherent vortical structures in two-dimensional plasma turbulence

AU - Pécseli, H.L.

AU - Coutsias, E.A.

AU - Huld, T.

AU - Lynov, Jens-Peter

AU - Nielsen, A.H.

AU - Juul Rasmussen, J.

PY - 1992/12

Y1 - 1992/12

N2 - A laboratory experiment was carried out in order to study the nonlinear saturated stage of the cross-field electrostatic Kelvin-Helmholtz instability in a strongly magnetized plasma. The presence of large vortex-like structures in a background of wide-band turbulent fluctuations was demonstrated by a conditional sampling technique. The formation of the structures was interpreted in terms of an inverse cascade, i.e. as the combined result of small scale structures generated by the instability and a subsequent coalescence of small vortices into larger ones. This interpretation was supported by numerical simulations. The importance of the large scale structures for the turbulent plasma transport across magnetic field lines was analyzed in detail.

AB - A laboratory experiment was carried out in order to study the nonlinear saturated stage of the cross-field electrostatic Kelvin-Helmholtz instability in a strongly magnetized plasma. The presence of large vortex-like structures in a background of wide-band turbulent fluctuations was demonstrated by a conditional sampling technique. The formation of the structures was interpreted in terms of an inverse cascade, i.e. as the combined result of small scale structures generated by the instability and a subsequent coalescence of small vortices into larger ones. This interpretation was supported by numerical simulations. The importance of the large scale structures for the turbulent plasma transport across magnetic field lines was analyzed in detail.

KW - Optik og fluid dynamik

U2 - 10.1088/0741-3335/34/13/041

DO - 10.1088/0741-3335/34/13/041

M3 - Conference article

SN - 0741-3335

VL - 34

SP - 2065

EP - 2070

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 13

M1 - 041

T2 - 9th Kiev International Conference on Plasma Theory; 9th International Conference on Waves and Instabilities in Plasmas; 19th EPS Conference on Controlled Fusion and Plasma Physics

Y2 - 29 June 1992 through 3 July 1992

ER -

Coherent vortical structures in two-dimensional plasma turbulence

Abstract

Conference

Access to Document

OpenUrl availability

Fingerprint

Cite this