Publications related to Equilibrium pressure limits in stellarators

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

Measurement and modeling of three-dimensional equilibria in DIII-D

Holger Reimerdes

A detailed experiment-theory comparison reveals that linear ideal MHD theory is in quantitative agreement with external magnetic and internal soft x-ray measurements of the plasma response to externally applied non-axisymmetric fields over a broad range of ...

American Institute of Physics2011

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

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 ITER hybrid scenario equilibria

Olivier Sauter, Jonathan Graves, Wilfred Anthony Cooper

Numerical computations of ITER equilibria in the hybrid scenario using a three-dimensional (3D) magnetohydrodynamic equilibrium code with nested magnetic flux surfaces demonstrate the formation of internal 3D helical cores similar to saturated ideal intern ...

IOP2011

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

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

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

Equilibrium pressure limits in stellarators

Graph Chatbot

Chat with Graph Search

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Measurement and modeling of three-dimensional equilibria in DIII-D

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

Physics design of a saddle coil system for TCV

Helical ITER hybrid scenario equilibria

Helical core tokamak MHD equilibrium states

Macroscopic Stability of High Beta MAST 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

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

Macroscopic Stability of High Beta MAST plasmas

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Physics design of a saddle coil system for TCV

Measurement and modeling of three-dimensional equilibria in DIII-D

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

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

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

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

Helical ITER hybrid scenario equilibria

Helical core tokamak MHD equilibrium states