Publications related to Energetic ion dynamics and confinement in 3D saturated MHD configurations

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

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

Helical core tokamak MHD equilibrium states

Olivier Sauter, Basil Duval, Stefano Coda, Jonathan Graves, Wilfred Anthony Cooper, Holger Reimerdes, Benoît Labit, Antoine Pochelon, Jonathan Rossel, Mattia Albergante

Bifurcated magnetohydrodynamic tokamak equilibrium states with axisymmetric or helical core structure are computed. When a peaked pressure profile is chosen, the helical core structures appear like the {em snakes} that are observed in the JET tokamak. They ...

Caroline Wilkinson2011

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

Full-field drift Hamiltonian particle orbits in 3D geometry

Jonathan Graves, Wilfred Anthony Cooper, Stephan Brunner

A Hamiltonian/Lagrangian theory to describe guiding centre orbit drift motion which is canonical in the Boozer coordinate frame has been extended to include full electromagnetic perturbed fields in anisotropic pressure 3D equilibria with nested magnetic fl ...

IOP2011

Full-Field Drift Hamiltonian Particle Orbit in 3D Geometry

Jonathan Graves, Wilfred Anthony Cooper, Stephan Brunner

A Hamiltonian/Lagrangian theory to describe guiding centre orbit drift motion which is canonical in the Boozer coordinate frame has been extended to include full electromagnetic perturbed fields in anisotropic pressure 3D equilibria with nested magnetic fl ...

Institute of Physics2011

Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

Mattia Albergante, Otto Asunta

Here we demonstrate a comprehensive comparison of collective Thomson scattering (CTS) measurements with steady-state Monte Carlo simulations performed with the ASCOT and VENUS codes. The measurements were taken at a location on the magnetic axis as well as ...

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

Full-field drift Hamiltonian particle orbits in axisymmetric tokamak geometry

Jonathan Graves, Wilfred Anthony Cooper

A Hamiltonian/Lagrangian theory to describe guiding center orbit drift motion that is canonical in Boozer magnetic coordinates is developed to include full electrostatic and electromagnetic perturbed fields in axisymmetric tokamak geometry. Furthermore, th ...

AIP2011

Self-Consistent ICRH Distribution Functions and Equilibria in Magnetically Confined Plasmas

Martin Jucker

The deployment of high power radio frequency waves in the ion cyclotron range (ICRF) constitutes an important operational facility in many plasma devices, including ITER. Any charged particle describes a helical motion around a given magnetic field line, t ...

EPFL2010

Local and Global Eulerian Gyrokinetic Simulations of Microturbulence in Realistic Geometry with Applications to the TCV Tokamak

Xavier Lapillonne

In magnetically confined fusion devices, the energy and particle transport is significantly larger than expected from purely collisional processes. This degraded confinement mostly results from small-scale turbulence and prevents from reaching self-sustain ...

EPFL2010

Energetic ion dynamics and confinement in 3D saturated MHD configurations

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

Helical core tokamak MHD equilibrium states

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

Full-field drift Hamiltonian particle orbits in 3D geometry

Full-Field Drift Hamiltonian Particle Orbit in 3D Geometry

Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

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

Full-field drift Hamiltonian particle orbits in axisymmetric tokamak geometry

Self-Consistent ICRH Distribution Functions and Equilibria in Magnetically Confined Plasmas

Local and Global Eulerian Gyrokinetic Simulations of Microturbulence in Realistic Geometry with Applications to the TCV Tokamak

Self-Consistent ICRH Distribution Functions and Equilibria in Magnetically Confined Plasmas

Local and Global Eulerian Gyrokinetic Simulations of Microturbulence in Realistic Geometry with Applications to the TCV Tokamak

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

Comparison of measured and simulated fast ion velocity distributions in the TEXTOR tokamak

Full-Field Drift Hamiltonian Particle Orbit in 3D Geometry

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

Full-field drift Hamiltonian particle orbits in axisymmetric tokamak geometry

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

Helical core tokamak MHD equilibrium states

Full-field drift Hamiltonian particle orbits in 3D geometry