Concept

Field line

Related publications (98)

A possible role of radial electric field in driving parallel ion flow in scrape-off layer of divertor tokamaks

Richard Pitts, Marco Wischmeier, Heinz Mueller

The radial electric field in known to be one of the drivers of parallel ion flow in the SOL. It contributes to the ion Pfirsch-Schluter flow and also determines the 'return parallel flow' that can arise to compensate poloidal E x B drift. It was establishe ...

2007

Non-adiabatic passing electron response and outward impurity convection in gyrokinetic calculations of impurity transport in ASDEX upgrade plasmas

Emiliano Fable

Gyrokinetic calculations with the GS2 code of impurity transport in ASDEX Upgrade H-mode plasmas are presented. A method to separate the diagonal and off-diagonal terms in the quasi-linear flux computed by the gyrokinetic code for a trace impurity is intro ...

2007

Hyper-Raman spectrum of vitreous silica from first principles

Alfredo Pasquarello

We introduce a scheme for the calculation of nonresonant hyper-Raman spectra of vitreous materials within a density-functional formulation. Hyper-Raman tensors are obtained through the application of finite electric fields and explicitly account for the no ...

2007

The role of the radial electric field for the transition to high confinement regimes

Duccio Testa

The radial electric field E-r(x, t), and particularly its gradient, has been invoked by various theories and empirical models as a crucial parameter 'per se' for determining the transition to high confinement regimes, such as the onset of an internal trans ...

2006

Experimental characterization of drift-interchange instabilities in a simple toroidal plasma

Ambrogio Fasoli, Ivo Furno, Stephan Brunner, Benoît Labit, Mario Ludovico Podesta, Francesca Maria Poli, Gennady Plyushchev

Low frequency electrostatic instabilities are investigated on TORPEX [Fasoli, Labit, McGrath, Muller, Podesta, and Poli, Bull. Am. Phys. Soc. 48, 119 (2003)], a toroidal device for basic plasma physics experiments with a toroidal magnetic field 100 mT and ...

2006

Toroidal plasma rotation in the TCV tokamak

Basil Duval, Alexander Karpushov, Antoine Pochelon, Andrea Scarabosio, Alessandro Bortolon

The first toroidal rotation measurements in TCV ohmic L-mode plasmas with no external momentum injection are presented. The toroidal velocity profile of the fully stripped carbon species is measured by active Charge eXchange Recombination Spectroscopy with ...

2006

Density functional theory with finite electric field

Alfredo Pasquarello

The method for treating finite electric fields within periodic boundary conditions is used to formally define a density functional depending on the electric field. An exchange and correlation energy functional depending on the electric field is introduced ...

2005

Infrared and Raman spectra of disordered materials from first principles

Alfredo Pasquarello

We describe a scheme for calculating the infrared and Raman spectra of large model structures from first principles. Our scheme is based on the application of a finite electric field in density functional calculations with periodic boundary conditions. Cou ...

2005

Simulations of global electrostatic microinstabilities in ASDEX Upgrade discharges

Olivier Sauter, Laurent Villard, Alberto Bottino

Electrostatic microinstabilities in ion internal barrier (ITB) and H-mode discharges of the ASDEX Upgrade tokamak [O. Gruber, R. Arslanbekov, C. Atanasiu , Nucl. Fusion 41, 1369 (2001)] have been investigated with a full radius gyrokinetic code. The code m ...

2004

Finite electric field in density functional calculations with periodic boundary conditions

Alfredo Pasquarello

Homogeneous electric fields are treated within density functional calculations with periodic boundary conditions. A nonlocal energy functional depending on the applied field is used within an ab initio molecular dynamics scheme. The reliability of the meth ...

2004

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.