Velocity fields and density fluctuations of edge turbulence are studied in I-mode [F. Ryter, Plasma Phys. Controlled Fusion 40, 725 (1998)] plasmas of the Alcator C-Mod [I. H. Hutchinson, Phys. Plasmas 1, 1511 (1994)] tokamak, which are characterized by a strong thermal transport barrier in the edge while providing little or no barrier to the transport of both bulk and impurity particles. Although previous work showed no clear geodesic-acoustic modes (GAM) on C-Mod, using a newly implemented, gas-puff-imaging based time-delay-estimate velocity inference algorithm, GAM are now shown to be ubiquitous in all I-mode discharges examined to date, with the time histories of the GAM and the I-mode specific [D. Whyte, Nucl. Fusion 50, 105005 (2010)]...
Tokamaks are toroidal machines designed to magnetically confine plasma and to host reactions of nucl...
The application of time-delay-estimation techniques to two-dimensional measurements of density fluct...
Geodesic acoustic modes (GAMs) may generate strong oscillations in the radial electric field and the...
The electrostatic potential and density fluctuations have been measured at the edge of the TEXTOR to...
Zonal flows, thought crucial to the saturation and self-regulation of turbulence and turbulent trans...
Turbulence-driven poloidal flows identified as Zonal flows are theoretically predicted to be respons...
International audienceThe geodesic acoustic mode is a coherently oscillating mode, related to the zo...
We report extended studies of the I-mode regime [Whyte et al., Nucl. Fusion 50, 105005 (2010)] obtai...
This paper attempts to give an overview on the study of the geodesic acoustic mode (GAM) and the rel...
International audienceThe geodesic acoustic mode (GAM) is a coherently oscillating zonal flow that m...
The geodesic acoustic mode (GAM) is a high frequency branch of zonal flows, which is observed in tor...
This paper attempts to give an overview on the study of the geodesic acoustic mode (GAM) and the rel...
Over the last years the investigation of zonal flows (ZF) and geodesic acoustic modes (GAMs) have be...
A key component in understanding the L-H transition is the behaviour and interactions of Zonal Flows...
The I-Mode confinement regime in tokamaks is a promising regime for nuclear fusion reactor operation...
Tokamaks are toroidal machines designed to magnetically confine plasma and to host reactions of nucl...
The application of time-delay-estimation techniques to two-dimensional measurements of density fluct...
Geodesic acoustic modes (GAMs) may generate strong oscillations in the radial electric field and the...
The electrostatic potential and density fluctuations have been measured at the edge of the TEXTOR to...
Zonal flows, thought crucial to the saturation and self-regulation of turbulence and turbulent trans...
Turbulence-driven poloidal flows identified as Zonal flows are theoretically predicted to be respons...
International audienceThe geodesic acoustic mode is a coherently oscillating mode, related to the zo...
We report extended studies of the I-mode regime [Whyte et al., Nucl. Fusion 50, 105005 (2010)] obtai...
This paper attempts to give an overview on the study of the geodesic acoustic mode (GAM) and the rel...
International audienceThe geodesic acoustic mode (GAM) is a coherently oscillating zonal flow that m...
The geodesic acoustic mode (GAM) is a high frequency branch of zonal flows, which is observed in tor...
This paper attempts to give an overview on the study of the geodesic acoustic mode (GAM) and the rel...
Over the last years the investigation of zonal flows (ZF) and geodesic acoustic modes (GAMs) have be...
A key component in understanding the L-H transition is the behaviour and interactions of Zonal Flows...
The I-Mode confinement regime in tokamaks is a promising regime for nuclear fusion reactor operation...
Tokamaks are toroidal machines designed to magnetically confine plasma and to host reactions of nucl...
The application of time-delay-estimation techniques to two-dimensional measurements of density fluct...
Geodesic acoustic modes (GAMs) may generate strong oscillations in the radial electric field and the...