Concept

Tokamak sphérique

Publications associées (545)

Turbulence and zonal flow structures in the core and L-mode pedestal of tokamak plasmas

Olivier Sauter, Laurent Villard, Stephan Brunner, Trach-Minh Tran, Ben McMillan, Gabriele Merlo, Julien Stanislas Pierre Dominski

Zonal flows (ZF) play a crucial role in regulating ion temperature gradient (ITG) turbulence. In previous global gyrokinetic simulations [1] using the ORB5 code with the adiabatic electron model, it was observed that long-lived ZF structures, leading to a ...

IOP Publishing2014

Physics of the conceptual design of the ITER plasma control system

Jonathan Bryan Lister, Richard Pitts

The ITER plasma control system (PCS) will play a central role in enabling the experimental program to attempt to sustain DT plasmas with Q = 10 for several hundred seconds and also support research toward the development of steady-state operation in ITER. ...

Elsevier Science Sa2014

Turbulent regimes in the tokamak scrape-off layer

Annamaria Mosetto

The tokamak scrape-off layer (SOL) is the plasma region characterized by open field lines that start and end on the vessel walls. The plasma dynamics in the SOL plays a crucial role in determining the overall performance of a tokamak, since it controls the ...

EPFL2014

Advancing plasma turbulence understanding through a rigorous Verification and Validation procedure: a practical example

Paolo Ricci

The methodology used to assess the reliability of numerical simulation codes constitutes the Veri- fication and Validation (V&V) procedure. V&V is composed by two separated tasks: the verifica- tion process, which is a mathematical issue targeted to assess ...

2014

Residual stress and pinch contributions to momentum transport in JET neutral beam heated H-modes

Henri Weisen, Yann Camenen

NA broad survey of the experimental database of neutral beam heated baseline and hybrid scenarios in the JET tokamak with the C-wall was undertaken and has established the ubiquity of non-diffusive momentum transport mechanisms in externally driven, strong ...

2013

Development of the gas puff charge exchange recombination spectroscopy (GP-CXRS) technique for ion measurements in the plasma edge

Christian Gabriel Theiler

A novel charge-exchange recombination spectroscopy (CXRS) diagnostic method is presented, which uses a simple thermal gas puff for its donor neutral source, instead of the typical high-energy neutral beam. This diagnostic, named gas puff CXRS (GP-CXRS), is ...

American Institute of Physics2013

Overview of experimental results and code validation activities at Alcator C-Mod

Christian Gabriel Theiler

Recent research on the Alcator C-Mod tokamak has focused on a range of scientific issues with particular emphasis on ITER needs and on detailed comparisons between experimental measurements and predictive models. Research on ICRF (ion cyclotron range of fr ...

2013

Theory-based scaling of the SOL width in circular limited tokamak plasmas

Ivo Furno, Paolo Ricci, Benoît Labit, Joaquim Loizu Cisquella, Jan Horacek, Sébastien Jolliet, Federico David Halpern, Gilles Arnoux, Annamaria Mosetto

A theory-based scaling for the characteristic length of a circular, limited tokamak scrape-off layer (SOL) is obtained by considering the balance between parallel losses and non-linearly saturated resistive ballooning mode turbulence driving anomalous perp ...

Iop Publishing Ltd2013

Collisions in Global Gyrokinetic Simulations of Tokamak Plasmas using the Delta-f Particle-In-Cell Approach

Thibaut Vernay

The present work takes place within the general context of research related to the development of nuclear fusion energy. More specifically, this thesis is mainly a numerical and physical contribution to the understanding of turbulence and associated transp ...

EPFL2013

Toroidal drift precession and wave-particle interaction in shaped tokamaks with finite beta and neoclassical equilibrium effects

Jonathan Graves

The drift kinetic equation is analysed for linear instabilities that are sensitive to the toroidal drift motion of long-mean free path particle populations. The interaction Lagrangian is resolved, and the toroidal drift precession evaluated for realistic t ...

Iop Publishing Ltd2013

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