Publication
A model of non-Maxwellian electron distribution function for the analysis of ECE data in JET discharges
Publications associées (42)
Generation of suprathermal electrons during sawtooth crashes in a tokamak plasma
Ambrogio Fasoli, Timothy Goodman, Igor Klimanov
The acceleration of electrons during a sawtooth crash is demonstrated in various regimes of the TCV tokamak plasma. Simultaneous measurements of electron cyclotron emission from the low field side and from the high field side of the tokamak provide informa ...
2007Plasma production and transport in a simple magnetised toroidal plasma
This Thesis addresses questions related to transport phenomena and the plasma production mechanisms by injection of microwaves in the electron-cyclotron frequency range in the simple magnetised toroidal plasma TORPEX. The second subject is investigated in ...
EPFL2007Ion Temperature Fluctuations in ELMy H-mode of the X3 EC-heated Plasmas on TCV
Basil Duval, Alexander Karpushov, Christian Schlatter
This paper focuses on interpreting variations in the NPA measured energy distribution of neutral fluxes from the TCV high density H-mode plasma discharges with strong third harmonic electron cyclotron heating (P_{X3}>P_{\Omega}). Two quasi-stationary regim ...
2007Reconstruction of the electron distribution function during ECRH/ECCD and magnetic reconnection events in a tokamak plasma
The performance of tokamaks is usually described in terms of plasma temperature, density and confinement time. The term temperature implies that the plasma is in thermal equilibrium and its particles have maxwellian (normal) velocity distribution. However, ...
EPFL2006Étude du transport d'énergie thermique dans les plasmas du tokamak à configuration variable au moyen de chauffage électronique cyclotronique
The development of controlled thermonuclear fusion, a quasi-unlimited energy source suitable for large scale electricity production, is one of the main goals of plasma physics research. Among the directions explored to date, the use of toroidal devices cal ...
EPFL2006Influence of non-Maxwellian velocity distributions during ECRH and ECCD on electron temperature measurements by Thomson scattering
Olivier Sauter, Roland Behn, Igor Klimanov, Petri Nikkola
Deposition of electron cyclotron waves at high-power densities for heating and current drive in a tokamak plasma generates a population of fast electrons and therefore the velocity distribution of the electron population will deviate from a Maxwellian. Apa ...
2005Chauffage de plasma par ondes électromagnétiques à la troisième harmonique de la fréquence cyclotron des électrons dans le tokamak TCV
The Tokamak à Configuration Variable (TCV) programme is based on flexible plasma shaping capabilities together with a powerful electron cyclotron wave (ECW) additional heating for studies of stability, confinement, transport, control and power exhaust. In ...
EPFL2005Electron heat transport in shaped TCV L-mode plasmas
Olivier Sauter, Stefano Coda, Timothy Goodman, Laurie Porte, Alexander Karpushov, Antoine Pochelon, Yann Camenen, Roland Behn, Alberto Bottino
Electron heat transport experiments are performed in L-mode discharges at various plasma triangularities, using radially localized electron cyclotron heating to vary independently both the electron temperature T-e and the normalized electron temperature gr ...
2005High field side measurements of non-thermal electron cyclotron emission on TCV plasmas with ECH and ECCD
Stefano Coda, Stefano Alberti, Patrick Blanchard, Henri Weisen, Igor Klimanov, Petri Nikkola
Measurements of electron cyclotron emission (ECE) from the high field side of the TCV tokamak have been made on plasmas heated by second and third harmonic X-mode electron cyclotron heating (ECH) and electron cyclotron current drive (ECCD). Suprathermal EC ...
2002Quantum coherence and lifetimes of surface-state electrons
We discuss a novel approach to measure the electron phase-relaxation length and femtosecond lifetimes at surfaces. It relies on the study of the spatial decay of quantum interference patterns in the local density of states (LDOS) with the STM. The method h ...
2000