Publications related to Basic Investigation of Turbulent Structures and Blobs of Relevance for Magnetic Fusion Plasmas

Global two-fluid simulations of tokamak SOL turbulence

Paolo Ricci, Federico David Halpern, Annamaria Mosetto

We present non-linear self-consistent global simulations of the SOL plasma dynamics using the Global Braginskii Solver (GBS) code. The code solves on the drift-reduced Braginkii equations, with cold ions. Studied originally for the simulation of the Simple ...

2011

Fast Imaging of Turbulent Plasmas in the TORPEX Device

Davoud Iraji

This thesis addresses the issue of turbulence generated modes and intermittent structures using a fast visible imaging system on TORPEX. The plasma radiation mechanisms and experimental setup of the imaging system are discussed together with an optimized t ...

EPFL2011

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Paolo Ricci, Christian Gabriel Theiler, Joaquim Loizu Cisquella

For the first time, a rigorous definition of the magnetic presheath entrance (MPSE) is provided, as the location where the drift-reduced approximation breaks down. We consider a weakly collisional electrostatic plasma with cold ions in contact with an abso ...

2011

Improved dynamic response of magnetic feedback in RFX-mod and DIII-D

Holger Reimerdes

The wall of any magnetic fusion device is characterized by the presence of several 3D structures, such as portholes for diagnostics and for heating and current drive systems, coil feeds and other features. Time-varying magnetic fields induce eddy currents ...

2011

Turbulence and bias-induced flows in simple magnetized toroidal plasmas

Paolo Ricci, Bo Li

Turbulence and bias-induced flows in simple magnetized toroidal plasmas are explored with global three-dimensional fluid simulations, focusing on the parameters of the Helimak experiment. The simulations show that plasma turbulence and transport in the reg ...

2011

Simulation of tokamak SOL turbulence

Paolo Ricci, Federico David Halpern, Annamaria Mosetto

One of the most important open issue for the realization of a fusion reactor is the understanding of the turbulence that develops at the periphery of the device, in the region called the edge. Turbulence is the major cause of particles and energy losses an ...

2011

Observations of core toroidal rotation reversals in Alcator C-Mod ohmic L-mode plasmas

Basil Duval, Alessandro Bortolon

Direction reversals of intrinsic toroidal rotation have been observed in Alcator C-Mod ohmic L-mode plasmas following modest electron density or toroidal magnetic field ramps. The reversal process occurs in the plasma interior, inside of the q = 3/2 surfac ...

2011

Magnetic energy flows during the current quench and termination of disruptions with runaway current plateau formation in JET and implications for ITER

James Paley

The magnetic energy balance and magnetic energy flows for plasma disruptions in which runaway plateau plasmas are formed and terminated at JET has been analysed and compared with that of runaway-free disruptions. The analysis shows that the energy loss pro ...

2011

Direct two-dimensional measurements of the eld-aligned current associated with plasma blobs

Ambrogio Fasoli, Ivo Furno, Christian Gabriel Theiler, Nicola Vianello

In simple magnetized toroidal plasmas, field-aligned blobs originate from ideal interchange waves and propagate radially outward under the effect of

\grad B

and curvature induced

E \times B

drifts. We report on the first experimental two-dimensional me ...

2011

Blob motion and control in simple magnetized plasmas

Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Benoît Labit, Christian Gabriel Theiler, Davoud Iraji

The radial propagation of plasma blobs and possibilities of influencing it are investigated in the TORPEX toroidal experiment [Fasoli et al., Phys. Plasmas 13, 055902 (2006)]. The effect of changing the connection length and the neutral background pressure ...

American Institute of Physics2011

Basic Investigation of Turbulent Structures and Blobs of Relevance for Magnetic Fusion Plasmas

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Global two-fluid simulations of tokamak SOL turbulence

Fast Imaging of Turbulent Plasmas in the TORPEX Device

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Improved dynamic response of magnetic feedback in RFX-mod and DIII-D

Turbulence and bias-induced flows in simple magnetized toroidal plasmas

Simulation of tokamak SOL turbulence

Observations of core toroidal rotation reversals in Alcator C-Mod ohmic L-mode plasmas

Magnetic energy flows during the current quench and termination of disruptions with runaway current plateau formation in JET and implications for ITER

Direct two-dimensional measurements of the eld-aligned current associated with plasma blobs

Blob motion and control in simple magnetized plasmas

Simulation of tokamak SOL turbulence

Observations of core toroidal rotation reversals in Alcator C-Mod ohmic L-mode plasmas

Improved dynamic response of magnetic feedback in RFX-mod and DIII-D

Blob motion and control in simple magnetized plasmas

Global two-fluid simulations of tokamak SOL turbulence

Turbulence and bias-induced flows in simple magnetized toroidal plasmas

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Magnetic energy flows during the current quench and termination of disruptions with runaway current plateau formation in JET and implications for ITER

Direct two-dimensional measurements of the eld-aligned current associated with plasma blobs

Fast Imaging of Turbulent Plasmas in the TORPEX Device