Simulation of zonal flow excitation by drift mode turbulence: applications to tokamaks and the magnetopause

R M G M Trines, R Bingham, M W Dunlop, A Vaivads, J A Davies, L O Silva, J T Mendonça, P K Shukla

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Recently, we investigated the interaction between broadband drift mode turbulence and zonal flows near the edge of a region of magnetized plasma (Trines et al 2005 Phys. Rev. Lett. 94 165002). Our simulation results showed the development of a zonal flow through the modulational instability of the drift wave distribution, as well as the existence of solitary zonal flow structures about an ion gyroradius wide, drifting towards steeper relative density gradients. Both the growth rate of the turbulence and the particle/energy transport across the plasma boundary can be stabilized by adjusting the plasma density gradient. This spontaneous formation of solitary wave structures has also been found in Cluster satellite observations (Trines et al 2007 Phys. Rev. Lett. 99 205006), confirming our earlier theoretical predictions. We will discuss the consequences of our results for our understanding of the Earth's magnetopause, as well as for the study of zonal flows in tokamaks.
LanguageEnglish
Article number124048
Number of pages9
JournalPlasma Physics and Controlled Fusion
Volume50
Issue number12
DOIs
Publication statusPublished - 6 Nov 2008

Fingerprint

Magnetopause
magnetopause
Turbulence
turbulence
Plasmas
Plasma density
Flow structure
Solitons
excitation
simulation
Earth (planet)
Satellites
gradients
satellite observation
Ions
particle energy
plasma density
solitary waves
adjusting
broadband

Keywords

  • plasma turbulence
  • MHD waves
  • plasma waves
  • tokamaks
  • magnetopause
  • drift waves

Cite this

Trines, R M G M ; Bingham, R ; Dunlop, M W ; Vaivads, A ; Davies, J A ; Silva, L O ; Mendonça, J T ; Shukla, P K. / Simulation of zonal flow excitation by drift mode turbulence : applications to tokamaks and the magnetopause. In: Plasma Physics and Controlled Fusion. 2008 ; Vol. 50, No. 12.
@article{7cec63439cb743d28da748604c1c8c7c,
title = "Simulation of zonal flow excitation by drift mode turbulence: applications to tokamaks and the magnetopause",
abstract = "Recently, we investigated the interaction between broadband drift mode turbulence and zonal flows near the edge of a region of magnetized plasma (Trines et al 2005 Phys. Rev. Lett. 94 165002). Our simulation results showed the development of a zonal flow through the modulational instability of the drift wave distribution, as well as the existence of solitary zonal flow structures about an ion gyroradius wide, drifting towards steeper relative density gradients. Both the growth rate of the turbulence and the particle/energy transport across the plasma boundary can be stabilized by adjusting the plasma density gradient. This spontaneous formation of solitary wave structures has also been found in Cluster satellite observations (Trines et al 2007 Phys. Rev. Lett. 99 205006), confirming our earlier theoretical predictions. We will discuss the consequences of our results for our understanding of the Earth's magnetopause, as well as for the study of zonal flows in tokamaks.",
keywords = "plasma turbulence, MHD waves, plasma waves, tokamaks, magnetopause, drift waves",
author = "Trines, {R M G M} and R Bingham and Dunlop, {M W} and A Vaivads and Davies, {J A} and Silva, {L O} and Mendon{\cc}a, {J T} and Shukla, {P K}",
year = "2008",
month = "11",
day = "6",
doi = "10.1088/0741-3335/50/12/124048",
language = "English",
volume = "50",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
number = "12",

}

Simulation of zonal flow excitation by drift mode turbulence : applications to tokamaks and the magnetopause. / Trines, R M G M; Bingham, R; Dunlop, M W; Vaivads, A; Davies, J A; Silva, L O; Mendonça, J T; Shukla, P K.

In: Plasma Physics and Controlled Fusion, Vol. 50, No. 12, 124048, 06.11.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Simulation of zonal flow excitation by drift mode turbulence

T2 - Plasma Physics and Controlled Fusion

AU - Trines, R M G M

AU - Bingham, R

AU - Dunlop, M W

AU - Vaivads, A

AU - Davies, J A

AU - Silva, L O

AU - Mendonça, J T

AU - Shukla, P K

PY - 2008/11/6

Y1 - 2008/11/6

N2 - Recently, we investigated the interaction between broadband drift mode turbulence and zonal flows near the edge of a region of magnetized plasma (Trines et al 2005 Phys. Rev. Lett. 94 165002). Our simulation results showed the development of a zonal flow through the modulational instability of the drift wave distribution, as well as the existence of solitary zonal flow structures about an ion gyroradius wide, drifting towards steeper relative density gradients. Both the growth rate of the turbulence and the particle/energy transport across the plasma boundary can be stabilized by adjusting the plasma density gradient. This spontaneous formation of solitary wave structures has also been found in Cluster satellite observations (Trines et al 2007 Phys. Rev. Lett. 99 205006), confirming our earlier theoretical predictions. We will discuss the consequences of our results for our understanding of the Earth's magnetopause, as well as for the study of zonal flows in tokamaks.

AB - Recently, we investigated the interaction between broadband drift mode turbulence and zonal flows near the edge of a region of magnetized plasma (Trines et al 2005 Phys. Rev. Lett. 94 165002). Our simulation results showed the development of a zonal flow through the modulational instability of the drift wave distribution, as well as the existence of solitary zonal flow structures about an ion gyroradius wide, drifting towards steeper relative density gradients. Both the growth rate of the turbulence and the particle/energy transport across the plasma boundary can be stabilized by adjusting the plasma density gradient. This spontaneous formation of solitary wave structures has also been found in Cluster satellite observations (Trines et al 2007 Phys. Rev. Lett. 99 205006), confirming our earlier theoretical predictions. We will discuss the consequences of our results for our understanding of the Earth's magnetopause, as well as for the study of zonal flows in tokamaks.

KW - plasma turbulence

KW - MHD waves

KW - plasma waves

KW - tokamaks

KW - magnetopause

KW - drift waves

UR - http://iopscience.iop.org/0741-3335/

U2 - 10.1088/0741-3335/50/12/124048

DO - 10.1088/0741-3335/50/12/124048

M3 - Article

VL - 50

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 12

M1 - 124048

ER -