Publication

Quantum chaos? Genericity and nongenericity in the MHD spectrum of nonaxisymmetric toroidal plasmas

Publications associées (180)

Evidence for a new path to the self-sustainment of the thermonuclear fusion in magnetically confined burning plasma experiments

In this work we provide the first explanation for observations made in 1997 on the Joint European Torus of unexpected ion heating with fusion-born alpha particles occurring over time scales much shorter than those theoretically foreseen. We demonstrate tha ...

2012

A phenomenological explanation for the anomalous ion heating observed in the JET alpha-heating experiment of 1997

Duccio Testa, Mattia Albergante

In the so-called alpha-heating experiment performed on the JET tokamak during the deuterium-tritium campaign of 1997, the ion temperature was found to be far exceeding (both in absolute value and in its rise time) the level that could have been expected ...

Institute of Physics2012

Investigation of suprathermal ion transport in TORPEX

Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Kyle Gustafson, Alexandre Dominique Bovet

Basic aspects of suprathermal ion transport in interchange-mode unstable plasmas are investigated in the simple toroidal plasma device TORPEX. Suprathermal ions are generated with a miniaturized lithium 6+ ion source with energies up to 1keV, and are detec ...

2012

From astrophysics to fusion plasmas: signal processing and system optimization analysis for ITER

Duccio Testa

Efficient, real-time and unsupervised data analysis is one of the key elements for achieving scientific success in complex engineering and physical systems, of which three examples are the currently operating Joint European Torus (JET) and the soon-to-be-b ...

2012

Bifurcated Helical Core Equilibrium States in Tokamaks

Olivier Sauter, Basil Duval, Stefano Coda, Jonathan Graves, Wilfred Anthony Cooper, Holger Reimerdes, Benoît Labit, Antoine Pochelon, David Pfefferlé, Federico David Halpern, Daniele Brunetti, Jonathan Rossel, Mattia Albergante

Tokamaks with weak to moderate reversed central shear in which the minimum rotational transform

q_{min}

is in the neighbourhood of unity can trigger bifurcated MagnetoHydrodynamic (MHD) equilibrium states, one of which is similar to a saturated ideal ...

2012

Plasma isotopic effect on the damping rate of toroidal Alfven eigenmodes with intermediate toroidal mode numbers

Ambrogio Fasoli, Duccio Testa, Patrick Blanchard, Theodoros Panis

This paper reports on the results of recent experiments performed on the JET tokamak on toroidal Alfven eigenmodes (TAEs) with toroidal mode number (n) in the range up to vertical bar n vertical bar = 7. The stability properties of these medium-nTAEs are i ...

Int Atomic Energy Agency2012

Plasma Isotopic Effect on the Damping Rate of Toroidal Alfven Eigenmodes with Intermediate Toroidal Mode Numbers

Ambrogio Fasoli, Duccio Testa, Patrick Blanchard, Theodoros Panis

This paper reports on the results of recent experiments performed on the JET tokamak on toroidal Alfvén eigenmodes (TAEs) with toroidal mode number (n) in the range up to |n|=7. The stability properties of these medium-nTAEs are investigated experimentally ...

2012

Lévy walk description of suprathermal ion transport

Paolo Ricci, Kyle Gustafson

Transport of suprathermal ions is examined from the Levy walk perspective in a simple magnetized toroidal plasma. Depending on their energy, these suprathermal ions exhibit superdiffusive, diffusive, or subdiffusive dispersion as a result of the complex in ...

American Institute of Physics2012

Diamagnetic drift stabilized ballooning modes in a 3D heliotron

Wilfred Anthony Cooper, Ben McMillan

An analysis of kinetic ballooning modes is presented, ray trajectories for the inward shifted Large Helical Device configuration at modest and with an anisotropic pressure profile due to the hot particles are evaluated and an estimate of the margin ...

2012

Diamagnetic drift stabilized ballooning modes in a 3D heliotron

Wilfred Anthony Cooper, Ben McMillan

An analysis of kinetic ballooning modes is presented, ray trajectories for the inward shifted Large Helical Device configuration at modest $$ and with an anisotropic pressure profile due to the hot particles are evaluated and an estimate of the margi ...

IOP Publishing2012

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Bifurcated Helical Core Equilibrium States in Tokamaks

Tokamaks with weak to moderate reversed central shear in which the minimum rotational transform

q_{min}

is in the neighbourhood of unity can trigger bifurcated MagnetoHydrodynamic (MHD) equilibrium states, one of which is similar to a saturated ideal ...

2012