Concept
Classical diffusion
Related publications (40)
Modeling and control of the current density profile in tokamaks and its relation to electron transport
The current density in tokamak plasmas strongly affects transport phenomena, therefore its understanding and control represent a crucial challenge for controlled thermonuclear fusion. Within the vast framework of tokamak studies, three topics have been tac ...
EPFL2009Dissipative processes in interchange driven scrape-off layer turbulence
Jonathan Graves, Richard Pitts, Jan Horacek
First principles expressions are given for the parameters governing collisional diffusion and parallel losses of mass, momentum and energy in tokamak scrape-off layer (SOL) plasmas. These dissipative, or damping, coefficients are based on neoclassical perp ...
2007Chapter 2: Plasma confinement and transport
The understanding and predictive capability of transport physics and plasma confinement is reviewed from the perspective of achieving reactor-scale burning plasmas in the ITER tokamak, for both core and edge plasma regions. Very considerable progress has b ...
2007Measurement of edge electrostatic turbulence in the TCV tokamak plasma boundary
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 ...
EPFL2006A benchmark on the calculation of kinetic parameters based on reactivity effect experiments in the CROCUS reactor
Measurements in the CROCUS reactor at EPFL, Lausanne, are reported for the critical water level and the inverse reactor period for several different sets of delayed supercritical conditions. The experimental configurations were also calculated by four diff ...
Elsevier2006Enhancing the control of tokamaks via a continuous nonlinear control law
The control of the current, position and shape of an elongated cross-section tokamak plasma is complicated by the instability of the plasma vertical position. In this case the control becomes a significant problem when saturation of the power supplies is c ...
EPFL2004MHD spectroscopy
Experiments are conducted on the JET tokamak to demonstrate the diagnostic potential of Magneto-Hydro-Dynamics (MHD) spectroscopy, for the plasma bulk and its suprathennal components, using Alfven eigenmodes (AEs) excited by external antennas and by energe ...
2002Gyrokinetic modelling of macro-instabilities in high performance tokamak plasmas
Ambrogio Fasoli, Laurent Villard, Duccio Testa
The modelling of Alfvenic instabilities is discussed from the point of view of mode-conversion, showing how the development of the theory affects the predictions as the limitations of the models are gradually relaxed. Conventional tokamak plasmas are relat ...
2001Physics design of a high-beta quasi-axisymmetric stellarator
Key physics issues in the design of a high-beta quasi-axisymmetric stellarator configuration are discussed. The goal of the design study is a compact stellarator configuration with aspect ratio comparable to that of tokamaks and good transport and stabilit ...
1999Cross-Field Diffusion Quenching by Neutral Gas Injection in a Magnetized Plasma
Cross-field transport of test ions is investigated in a linear Q-machine plasma. Test particles are created and followed in their motion by an optical tagging diagnostic scheme. Diffusion is demonstrated to be supported by classical mechanisms. When differ ...
1992