Publications related to Plasma fluctuation studies in the TCV tokamak

Simulation of tokamak SOL turbulence

Paolo Ricci, Federico David Halpern, Annamaria Mosetto

One of the most important open issue for the realization of a fusion reactor is the understanding of the turbulence that develops at the periphery of the device, in the region called the edge. Turbulence is the major cause of particles and energy losses an ...

2011

Predictions on heat transport and plasma rotation from global gyrokinetic simulations

Laurent Villard, Trach-Minh Tran, Alberto Bottino, Sébastien Jolliet, Ben McMillan, Paolo Angelino

Flux-driven global gyrokinetic codes are now mature enough to make predictions in terms of turbulence and transport in tokamak plasmas. Some of the recent breakthroughs of three such codes, namely GYSELA, ORB5 and XGC1, are reported and compared wherever a ...

IOP2011

Peak neoclassical toroidal viscosity at low toroidal rotation in the DIII-D tokamak

Holger Reimerdes

Observation of a theoretically predicted peak in the neoclassical toroidal viscous (NTV) force as a function of toroidal plasma rotation rate is reported. The NTV was generated by applying n = 3 magnetic fields from internal (I-)coils to low plasmas produc ...

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

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

Blob current structures in TORPEX plasmas: experimental measurements and numerical simulations

Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Christian Gabriel Theiler, Nicola Vianello, Davoud Iraji, Diane Virginie Marie Lançon

In the simple magnetized torus TORPEX, field-aligned blobs originate from ideal interchange waves and propagate radially outward due to del B and curvature induced drifts. Time-resolved two-dimensional measurements of the field-aligned current density J(pa ...

2011

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

Fast Imaging of Blob Motion in TORPEX Plasmas

Ambrogio Fasoli, Ivo Furno, Davoud Iraji

To complement electrostatic probe measurements of plasma turbulence and study plasma structures with high spatial resolution, a nonperturbative direct imaging system has been developed on TORPEX. This system includes a fast framing Photron-APX-RS camera an ...

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

Plasma fluctuation studies in the TCV tokamak

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Simulation of tokamak SOL turbulence

Predictions on heat transport and plasma rotation from global gyrokinetic simulations

Peak neoclassical toroidal viscosity at low toroidal rotation in the DIII-D tokamak

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

Helical core tokamak MHD equilibrium states

Blob current structures in TORPEX plasmas: experimental measurements and numerical simulations

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

Fast Imaging of Blob Motion in TORPEX Plasmas

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

Helical core tokamak MHD equilibrium states

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

Fast Imaging of Blob Motion in TORPEX Plasmas

Simulation of tokamak SOL turbulence

Predictions on heat transport and plasma rotation from global gyrokinetic simulations

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

Peak neoclassical toroidal viscosity at low toroidal rotation in the DIII-D tokamak

Blob current structures in TORPEX plasmas: experimental measurements and numerical simulations

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