What question did this study set out to answer?

To investigate whether intermittent turbulent transport in toroidally confined plasmas can occur in the absence of critical pressure or temperature gradients.

July 8, 2004Physics of Plasmas

Investigation of intermittency in simulated and experimental turbulence data by wavelet analysis

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Authors

NMN. MahdizadehUniversity of Stuttgart MRM. RamischUniversity of Stuttgart USU. StrothMax Planck Institute for Plasma Physics

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Implication

Comparative simulation and experimental analysis reveals intermittent transport in subcritical magnetized plasmas, indicating bursty fusion transport occurs without critical gradient avalanches.

Key Points

To investigate whether intermittent turbulent transport in toroidally confined plasmas can occur in the absence of critical pressure or temperature gradients.
Analyzed numerical simulation data from the DALF3 drift-Alfvén-wave turbulence code configured with a fixed background pressure gradient.
Evaluated experimental fluctuation measurements obtained from a weakly driven, low-temperature plasma.
Applied wavelet transform techniques to isolate and characterize turbulent intermittency across distinct temporal scales.
Both simulated drift-wave data and experimental measurements successfully reproduced the characteristic peaked probability density functions and spectral decay profiles of fusion plasmas.
Intermittent transport bursts emerged without driving instabilities past critical pressure or temperature gradient thresholds, demonstrating that avalanche-like critical gradients are not required for plasma intermittency.

Cite This Study

Mahdizadeh et al. (2004) studied this question.

synapsesocial.com/papers/6a9fda5dccefcc8ad0efd509 https://doi.org/10.1063/1.1772378

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Implication

Comparative simulation and experimental analysis reveals intermittent transport in subcritical magnetized plasmas, indicating bursty fusion transport occurs without critical gradient avalanches.

Investigation of intermittency in simulated and experimental turbulence data by wavelet analysis

Discussion

Member takes

Implication

Key Points

Cite This Study

Investigation of intermittency in simulated and experimental turbulence data by wavelet analysis

Discussion

Member takes

Implication

Key Points

Cite This Study

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