Publications related to Drift stabilization of ballooning modes in an inward-Shifted LHD configuration

Drift stabilization of ballooning modes in a high-$\langle \beta \rangle$ LHD configuration

Jonathan Graves, Wilfred Anthony Cooper, Lucie Brocher

Ideal MHD yields at best inconclusive predictions about the stability of the LHD heliotron for

\langle \beta \rangle \geq 3\%

. We investigate the impact of the drift stabilization of ballooning modes for the inward shifted LHD configuration (vacuum magne ...

2010

Active excitation and damping rate measurement of intermediate-n Toroidal Alfvén Eigenmodes in JET, C-Mod and MAST plasmas

Ambrogio Fasoli, Duccio Testa, Theodoros Panis

The stability properties of Alfvén Eigenmodes (AEs) are investigated directly using external antenna excitation and detection of stable modes in a variety of plasma configurations in different devices. Dedicated methods to measure the AE damping rate separ ...

2010

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

Observation of a critical pressure gradient for the stabilization of interchange modes in simple magnetized toroidal plasmas

Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Benoît Labit, Christian Gabriel Theiler, Lucia Isabel Federspiel

The existence of a critical pressure gradient needed to drive the interchange instability is experimentally demonstrated in the simple magnetized torus TORoidal Plasma EXperiment [A. Fasoli et al., Phys. Plasmas 13, 055902 (2006)]. This gradient is reached ...

American Institute of Physics2009

Measurement of edge electrostatic turbulence in the TCV tokamak plasma boundary

Jan Horacek

Almost since the first density profile measurements were made in the scrape-off layer (SOL) of the early tokamaks, it has been recognized that the rate of particle transport perpendicular to magnetic surfaces exceeds that expected on the basis of classical ...

EPFL2006

Ideal MHD stability of tokamak plasmas with moderate and low aspect ratio

The need of durable and abundant energy sources for future ages stimulates the studies of thermonuclear energy sources, based on hot plasma confinement by magnetic fields. The most developed concept of hot plasma trap is the tokamak, where the plasma confi ...

EPFL2005

Chauffage de plasma par ondes électromagnétiques à la troisième harmonique de la fréquence cyclotron des électrons dans le tokamak TCV

Gilles Arnoux

The Tokamak à Configuration Variable (TCV) programme is based on flexible plasma shaping capabilities together with a powerful electron cyclotron wave (ECW) additional heating for studies of stability, confinement, transport, control and power exhaust. In ...

EPFL2005

Stable equilibria for bootstrap-current-driven low aspect ratio tokamaks

Olivier Sauter, Laurent Villard

Low aspect ratio tokamaks (LATs) can potentially provide a high ratio of plasma pressure to magnetic pressure beta and high plasma current I at a modest size. This opens up the possibility of a high-power density compact fusion power plant. For the concept ...

1997

Spectrum of ballooning instabilities in a stellarator

Wilfred Anthony Cooper

The recent revival of interest in the application of the ''ballooning formaiism'' to low-frequency plasma instabilities has prompted a comparison of the Wentzel-Kramers-Brillouin (WKB) ballooning approximation with an (in principle) exact normal mode calcu ...

1996

Local ideal magnetohydrodynamic stability of a quasihelically symmetric stellarator

Wilfred Anthony Cooper

The ideal magnetohydrodynamic stability with respect to localized ballooning modes and the Mercier criterion of a quasihelically symmetric stellarator configuration is investigated. Configurations with an enhanced magnetic mirror and a deeper magnetic well ...

1996

Drift stabilization of ballooning modes in an inward-Shifted LHD configuration

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Drift stabilization of ballooning modes in a high-$\langle \beta \rangle$ LHD configuration

Active excitation and damping rate measurement of intermediate-n Toroidal Alfvén Eigenmodes in JET, C-Mod and MAST plasmas

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

Observation of a critical pressure gradient for the stabilization of interchange modes in simple magnetized toroidal plasmas

Measurement of edge electrostatic turbulence in the TCV tokamak plasma boundary

Ideal MHD stability of tokamak plasmas with moderate and low aspect ratio

Chauffage de plasma par ondes électromagnétiques à la troisième harmonique de la fréquence cyclotron des électrons dans le tokamak TCV

Stable equilibria for bootstrap-current-driven low aspect ratio tokamaks

Spectrum of ballooning instabilities in a stellarator

Local ideal magnetohydrodynamic stability of a quasihelically symmetric stellarator

Ideal MHD stability of tokamak plasmas with moderate and low aspect ratio

Observation of a critical pressure gradient for the stabilization of interchange modes in simple magnetized toroidal plasmas

Measurement of edge electrostatic turbulence in the TCV tokamak plasma boundary

Chauffage de plasma par ondes électromagnétiques à la troisième harmonique de la fréquence cyclotron des électrons dans le tokamak TCV

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

Active excitation and damping rate measurement of intermediate-n Toroidal Alfvén Eigenmodes in JET, C-Mod and MAST plasmas

Local ideal magnetohydrodynamic stability of a quasihelically symmetric stellarator

Spectrum of ballooning instabilities in a stellarator

Drift stabilization of ballooning modes in a high-$\langle \beta \rangle$ LHD configuration

Stable equilibria for bootstrap-current-driven low aspect ratio tokamaks