Mode Selective Control of Drift Wave Turbulence

Schröder, C.; Klinger, T.; Block, Dietmar; Piel, A.; Bonhomme, Gérard; Naulin, V.

doi:10.1103/physrevlett.86.5711

Cited by 77 publications

(72 citation statements)

References 18 publications

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“…More precisely we choose a square box of 256ρ s × 256ρ s , not too close to the source region (in Fig. 1 the selected square box is between x ∈ [100, 356] in the radial direction and y ∈ [1,256] in the poloidal direction). This allows one to avoid the complex analysis of diffusive transport in finite systems, namely where the sources and sinks play an important role.…”

Section: Turbulent Potential and Test Particle Dynamicsmentioning

confidence: 99%

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Control of test particle transport in a turbulent electrostatic model of the Scrape-Off-Layer

Ciraolo

Ghendrih

Sarazin

et al. 2007

Journal of Nuclear Materials

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The E × B drift motion of charged test particle dynamics in the Scrape Off Layer (SOL)is analyzed to investigate a transport control strategy based on Hamiltonian dynamics. We model SOL turbulence using a 2D non-linear fluid code based on interchange instability which was found to exhibit intermittent dynamics of the particle flux. The effect of a small and appropriate modification of the turbulent electric potential is studied with respect to the chaotic diffusion of test particle dynamics. Over a significant range in the magnitude of the turbulent electrostatic field, a three-fold reduction of the test particle diffusion coefficient is achieved.

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Section: Turbulent Potential and Test Particle Dynamicsmentioning

confidence: 99%

“…Several experiments [1,2] have been dedicated to the control of turbulence in magnetized plasmas. Although a modelling of some of the experiments has been achieved, there was to date no theoretical backing for such a procedure.…”

Section: Introductionmentioning

confidence: 99%

Control of test particle transport in a turbulent electrostatic model of the Scrape-Off-Layer

Ciraolo

Ghendrih

Sarazin

et al. 2007

Journal of Nuclear Materials

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“…Recently, there has been an advance in the study of the nonlinear interaction between drift wave turbulence and meso-scale structures such as zonal flows and streamers [1,2], and experiments in linear plasma devices have been in progress [3][4][5][6][7][8][9][10]. In these studies, complex wave patterns in poloidal direction have been observed (see also reports from toroidal plasma experiments, e.g., [11][12][13][14]).…”

Section: Introductionmentioning

confidence: 89%

“…These advancements highlight the need to measure fluctuations at multiple spatial positions simultaneously. Fluctuation measurements have been performed with poloidal multiprobe arrays in linear and toroidal plasmas [3,4,6,15].…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal Behavior of Drift Waves in LMD-U

Yamada

Itoh

Terasaka

et al. 2008

Plasma and Fusion Research

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In the LMD-U linear magnetized plasma, fluctuation measurements have been performed with multi-channel poloidal Langmuir probe arrays to investigate the spatiotemporal behaviors of drift wave turbulence. Twodimensional (poloidal mode number-frequency) power spectrum showed not only fluctuation peaks but also the existence of a broadband fluctuation. The broadband fluctuation developed at high poloidal mode number and high frequency regions and not along the linear dispersion relation curve of drift wave modes. It showed shorter correlation time and poloidal length than the peaked fluctuations. Two-dimensional axial coherence was measured with two poloidal probe arrays separated in the axial direction. The axial coherence was strong for both the broadband fluctuation and peak fluctuations, suggesting the quasi-two-dimensional structure of the drift wave turbulence.

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“…For example, the existence of zonal flows is regarded as crucial to controlling magnetically confined plasmas and realizing a thermonuclear fusion reactor [1,2]. Thus, understanding nonlinear mode coupling in drift wave fluctuation is essential [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Bispectral Analysis of Density and Potential Fluctuations in a High Neutral Density Cylindrical Plasma

Kobayashi

Inagaki

Arakawa

et al. 2010

Plasma and Fusion Research

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The structure of fluctuations in the Large Mirror Device-Upgrade (LMD-U) depends on the neutral density. In this study, we focus on the high neutral density plasma in which the potential and density fluctuation waveforms are nontrigonometric functions similar to sawtooth waves, and peaks in the power spectrum lie along a straight line when plotted as frequency versus wavenumber. Two-dimentional auto and cross bispectral analyses ofĨ is and/orṼ f , which consider both the matching conditions for both the azimuthal wavenumber and the frequency, have been performed; significant couplings are observed at particular peak frequencies. Similarities and differences between the auto and cross bicoherence ofĨ is and/orṼ f are discussed.

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Mode Selective Control of Drift Wave Turbulence

Cited by 77 publications

References 18 publications

Control of test particle transport in a turbulent electrostatic model of the Scrape-Off-Layer

Control of test particle transport in a turbulent electrostatic model of the Scrape-Off-Layer

Spatiotemporal Behavior of Drift Waves in LMD-U

Bispectral Analysis of Density and Potential Fluctuations in a High Neutral Density Cylindrical Plasma

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