Publications related to MHD Stability and Energy Principle for Two-Dimensional Equilibria without Assumption of Nested Magnetic Surfaces

Physics design of a saddle coil system for TCV

Yves Martin, Jean-Marc Moret, Jonathan Rossel

The upgrade project for TCV (Tokamak à Configuration Variable) includes the installation of a set of saddle coils, namely the saddle coil system (SCS), located and powered such as to create a helical magnetic perturbation. Using independent power supplies, ...

Elsevier2011

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

Macroscopic Stability of High Beta MAST plasmas

Jonathan Graves, Wilfred Anthony Cooper

The high-beta capability of the spherical tokamak, coupled with a suite of world-leading diagnostics on MAST, has facilitated significant improvements in the understanding of performance-limiting core instabilities in high performance plasmas. For instance ...

IOP2011

Assessment of the ITER High-Frequency Magnetic Diagnostic Set

Jean-Marc Moret, Duccio Testa, René Chavan, Matthieu Toussaint, Jonathan Bryan Lister, Thomas Maeder, Gilbert Tonetti, Albert Perez, Francisco Sanchez, Jérôme Guterl

The ITER high-frequency (HF) magnetic diagnostic system has to provide essential measurements of MHD instabilities with |deltaBmeas/BPOL|~1e-4 (~1G) for frequencies up to 2MHz to resolve toroidal mode numbers (n) in the range |n|=10 to |n|=50. A review of ...

2011

Assessment of the ITER high-frequency magnetic diagnostic set

Jean-Marc Moret, Duccio Testa, René Chavan, Matthieu Toussaint, Jonathan Bryan Lister, Thomas Maeder, Gilbert Tonetti, Albert Perez, Francisco Sanchez, Jérôme Guterl

The ITER high-frequency (HF) magnetic diagnostic system has to provide essential measurements of MHD instabilities with vertical bar delta B-MEAS/B-POL vertical bar similar to 10(-4) (similar to 1 G) for frequencies up to 2 MHz to resolve toroidal mode num ...

Elsevier2011

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

Off-axis fishbone-like instability and excitation of resistive wall modes in JT-60U and DIII-D

Holger Reimerdes

An energetic-particle (EP)-driven off-axis-fishbone-like mode (OFM) often triggers a resistive wall mode (RWM) in JT-60U and DIII-D devices, preventing long-duration high-βN discharges. In these experiments, the EPs are energetic ions (70-85 keV) injected ...

American 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

A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes

Wilfred Anthony Cooper, Nicola Vianello, Zheng Wang, Elena Gaio, Alberto Ferro

The full three-dimensional (3D) approach is now becoming an important issue for all magnetic confinement configurations. It is a necessary condition for the stellarator but also the tokamak and the reversed field pinch (RFP) now cannot be completely descri ...

Institute of Physics2010

MHD Stability and Energy Principle for Two-Dimensional Equilibria without Assumption of Nested Magnetic Surfaces

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Physics design of a saddle coil system for TCV

Helical core tokamak MHD equilibrium states

Macroscopic Stability of High Beta MAST plasmas

Assessment of the ITER High-Frequency Magnetic Diagnostic Set

Assessment of the ITER high-frequency magnetic diagnostic set

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

Off-axis fishbone-like instability and excitation of resistive wall modes in JT-60U and DIII-D

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

A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes

Assessment of the ITER High-Frequency Magnetic Diagnostic Set

A 3D approach to equilibrium, stability and transport studies in RFX-mod improved regimes

Off-axis fishbone-like instability and excitation of resistive wall modes in JT-60U and DIII-D

Helical core tokamak MHD equilibrium states

Physics design of a saddle coil system for TCV

Macroscopic Stability of High Beta MAST plasmas

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

Assessment of the ITER high-frequency magnetic diagnostic set

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