Coherent structures in ion temperature gradient turbulence-zonal flow
- Laboratoire de Physique des Plasmas, Ecole Polytechnique, Route de Saclay, 91128 Palaiseau Cedex (France)
- Institute for Plasma Research, Bhat, Gandhinagar 382 428 (India)
- WCI Center for Fusion Theory, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of)
Nonlinear stationary structure formation in the coupled ion temperature gradient (ITG)-zonal flow system is investigated. The ITG turbulence is described by a wave-kinetic equation for the action density of the ITG mode, and the longer scale zonal mode is described by a dynamic equation for the m = n = 0 component of the potential. Two populations of trapped and untrapped drift wave trajectories are shown to exist in a moving frame of reference. This novel effect leads to the formation of nonlinear stationary structures. It is shown that the ITG turbulence can self-consistently sustain coherent, radially propagating modulation envelope structures such as solitons, shocks, and nonlinear wave trains.
- OSTI ID:
- 22299665
- Journal Information:
- Physics of Plasmas, Vol. 21, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structures and Zonal Flows in Magnetized Plasmas
Radial Spreading of Drift-Wave-Zonal-Flow Turbulence via Soliton Formation
Radial Spreading of Drift-Wave–Zonal-Flow Turbulence via Soliton Formation
Journal Article
·
Tue Dec 14 00:00:00 EST 2010
· AIP Conference Proceedings
·
OSTI ID:22299665
Radial Spreading of Drift-Wave-Zonal-Flow Turbulence via Soliton Formation
Journal Article
·
Fri Jul 31 00:00:00 EDT 2009
· Physical Review Letters
·
OSTI ID:22299665
Radial Spreading of Drift-Wave–Zonal-Flow Turbulence via Soliton Formation
Journal Article
·
Thu Jul 30 00:00:00 EDT 2009
· Physical Review Letters
·
OSTI ID:22299665