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Sébastien Jolliet

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Related publications (55)

Page 2 of 3

Synergy between ion temperature gradient turbulence and neoclassical processes in global gyrokinetic particle-in-cell simulations

Stephan Brunner, Trach-Minh Tran, Laurent Villard, Alberto Bottino, Sébastien Jolliet, Thibaut Vernay, Ben McMillan

Based on the CYCLONE case, simulations of collisional electrostatic ion temperature gradient (ITG) microturbulence carried out with the global gyrokinetic particle-in-cell (PIC) code ORB5 are presented. Considering adiabatic electrons, an increase in ion h ...

American Institute of Physics (AIP)2012

Interaction of large scale flow structures with gyrokinetic turbulence

Laurent Villard, Alberto Bottino, Sébastien Jolliet, Thibaut Vernay, Ben McMillan

Shear flows have a profound influence on turbulence-driven transport in tokamaks. The introduction of arbitrary initial flow profiles into the code ORB5 [Jolliet et al., Comput. Phys. Commun. 177, 409 (2007)] allows the convenient study of how flows on all ...

American Institute of Physics2011

Boundary conditions for plasma fluid models at the magnetic presheath entrance

Sébastien Jolliet, Joaquim Loizu Cisquella, Paolo Ricci, Federico David Halpern

The proper boundary conditions at the magnetic presheath entrance for plasma fluid turbulence models based on the drift approximation are derived, focusing on a weakly collisional plasma sheath with Ti≪Te and a magnetic field oblique to a totally absorbing ...

American Institute of Physics2012

Quasi-steady and steady states in global gyrokinetic particle-in-cell simulations

Laurent Villard, Alberto Bottino, Sébastien Jolliet, Paolo Angelino, Thibaut Vernay, Ben McMillan

Collisionless delta-f gyrokinetic particle-in-cell simulations suffer from the entropy paradox, in which the entropy grows linearly in time while low-order moments are saturated. As a consequence, these simulations do not reach a steady state and are unsui ...

American Institute of Physics (AIP)2009

Gyrokinetic transport relations for gyroscale turbulence

Laurent Villard, Alberto Bottino, Sébastien Jolliet, Thibaut Vernay, Ben McMillan

We derive explicit local transport relations for the global gyrokinetic formalism at arbitrary wavelength. This is an extension of the analysis in Scott et. al. 2010 where this was examined in the long-wavelength limit. Deriving a local expression for the ...

IOP Publishing2012

Long global gyrokinetic simulations: Source terms and particle noise control

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

In global gyrokinetic simulations it takes a long time for the turbulence to reach a quasisteady state, and quantitative predictions about the quasisteady state turbulence have been difficult to obtain computationally. In particular, global particle-in-cel ...

American Institute of Physics2008

Three-dimensional simulations of blob dynamics in a simple magnetized torus

Sébastien Jolliet, Joaquim Loizu Cisquella, Paolo Ricci, Annamaria Mosetto, Federico David Halpern

The propagation of blobs, structures of localized enhanced plasma pressure, is studied in global three-dimensional simulations of a simple magnetized torus. In particular, we carry out single-seeded blob simulations to explore the dependence of the blob ve ...

American Institute of Physics (AIP)2014

Turbulent regimes in the tokamak scrape-off layer

Sébastien Jolliet, Joaquim Loizu Cisquella, Paolo Ricci, Annamaria Mosetto, Federico David Halpern

The non-linear turbulent regimes in the tokamak scrape-off layer (SOL) are identified according to the linear instability responsible for the perpendicular transport. Four regions of the SOL operational parameters are determined where turbulence is driven ...

American Institute of Physics2013

Simulation of plasma turbulence in scrape-off layer conditions: the GBS code, simulation results and code validation

Ambrogio Fasoli, Ivo Furno, Sébastien Jolliet, Joaquim Loizu Cisquella, Paolo Ricci, Christian Gabriel Theiler, Annamaria Mosetto, Federico David Halpern

Based on the drift-reduced Braginskii equations, the Global Braginskii Solver, GBS, is able to model the scrape-off layer (SOL) plasma turbulence in terms of the interplay between the plasma outflow from the tokamak core, the turbulent transport, and the l ...

Iop Publishing Ltd2012

Global simulations of tokamak microturbulence: finite beta effects and collisions

Stephan Brunner, Trach-Minh Tran, Laurent Villard, Alberto Bottino, Sébastien Jolliet, Thibaut Vernay, Ben McMillan

In this paper, we present global nonlinear gyrokinetic simulations including finite beta effects and collisions in tokamak geometry. Global electromagnetic simulations using conventional delta-f particle in cell methods are very demanding, with respect to ...

Institute of Physics2011

Rapid Fourier space solution of linear partial differential equations in toroidal magnetic confinement geometries

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

Fluctuating quantities in magnetic confinement geometries often inherit a strong anisotropy along the field lines. One technique for describing these structures is the use of a certain set of Fourier components on the tori of nested flux surfaces. We descr ...

Elsevier2009

On the definition of a kinetic equilibrium in global gyrokinetic simulations

Olivier Sauter, Trach-Minh Tran, Laurent Villard, Alberto Bottino, Sébastien Jolliet, Paolo Angelino

Nonlinear electrostatic global gyrokinetic simulations of collisionless ion temperature gradient (ITG) turbulence and ExB zonal flows in axisymmetric toroidal plasmas are examined for different choices of the initial distribution function. Using a local Ma ...

American Institute of Physics2006

System size effects on gyrokinetic turbulence

Laurent Villard, Alberto Bottino, Sébastien Jolliet, Ben McMillan

The scaling of turbulence-driven heat transport with system size in magnetically confined plasmas is reexamined using first-principles based numerical simulations. Two very different numerical methods are applied to this problem, in order to resolve a long ...

The American Physical Society2010

Orb5: A global electromagnetic gyrokinetic code using the PIC approach in toroidal geometry

Stephan Brunner, Laurent Villard, Alberto Bottino, Sébastien Jolliet, Paolo Angelino, Thibaut Vernay, Ben McMillan, Emmanuel Lanti, Julien Stanislas Pierre Dominski, Noé Thomas Elie Ohana, Aaron Lewis Scheinberg, Claudio Gheller, Peter François Tony Donnel

This paper presents the current state of the global gyrokinetic code Orb5 as an update of the previous reference (Jolliet et al., 2007). The Orb5 code solves the electromagnetic Vlasov–Maxwell system of equations using a PIC scheme and also includes collis ...

2019

Verification methodology for plasma simulations and application to a scrape-off layer turbulence code

Sébastien Jolliet, Joaquim Loizu Cisquella, Paolo Ricci, Fabio Riva, Annamaria Mosetto, Federico David Halpern

Bridging the gap between plasma physics and other scientific domains, in particular, the computational fluid dynamics community, a general, rigorous, and simple-to-apply methodology is presented for both the verification of the correct implementation of th ...

American Institute of Physics2014

Effects of plasma current on nonlinerar interactions of ITG turbulence, zonal flows and geodesic acoustic modes

Olivier Sauter, Laurent Villard, Alberto Bottino, Sébastien Jolliet, Paolo Angelino

2005

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

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

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

Clarifications to the limitations of the s-alpha equilibrium model for gyrokinetic computations of turbulence

Stephan Brunner, Laurent Villard, Sébastien Jolliet, Alessandro Marinoni

In the context of gyrokinetic flux-tube simulations of microturbulence in magnetized toroidal plasmas, different treatments of the magnetic equilibrium are examined. Considering the Cyclone DIII-D base case parameter set [Dimits et al., Phys. Plasmas 7, 96 ...

American Institute of Physics2009

The role of plasma elongation on the linear damping of zonal flows

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

American Institute of Physics (AIP)2008

Nonlinear low noise particle-in-cell simulations of electron temperature gradient driven turbulence

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

In this Letter, it is shown that global, nonlinear, particle-in-cell (PIC) simulations of electron temperature driven turbulence recover the same level of transport as flux-tube codes when the level of statistical noise, associated with the PIC discretizat ...

American Institute of Physics2007