71 citations · 623 across the 48 of their papers we have counts for
27 papers · 1 filter
Fractal and Wada escape basins in the chaotic particle drift motion in tokamaks
Leonardo C. Souza, Amanda C. Mathias, Iberê L. Caldas +2
The drift motion of particles in tokamaks provides valuable information on the turbulence-driven anomalous transport. One of the characteristic features of t…
Shaping the edge radial electric field to create shearless transport barriers in tokamaks
L. A. Osorio-Quiroga, M. Roberto, I. L. Caldas +2
In tokamak-confined plasmas, particle transport can be reduced by modifying the radial electric field. In this paper, we investigate the influence of both a well-like and a hill-li…
Shearless bifurcations in particle transport for reversed shear tokamaks
G. C. Grime, M. Roberto, R. L. Viana +2
Some internal transport barriers in tokamaks have been related to the vicinity of extrema of the plasma equilibrium profiles. This effect is numerically investigated by considering…
Time simulation of the nonlinear wave-particle interaction in meters long traveling-wave tubes
Damien F. G. Minenna, Khalil Aliane, Yves Elskens +4
We propose a multi-particle self-consistent Hamiltonian (derived from an N-body description) that is applicable for periodic structures such as traveling-wave tubes (TWTs), gyrotro…
Onset of internal transport barriers in tokamaks
L. A. Osorio, M. Roberto, I. L. Caldas +2
Barriers have been identified in magnetically confined plasmas reducing the particle transport and improving the confinement. One of them, the primary shearless barriers are associ…
Wave-particle interactions in a long traveling wave tube with upgraded helix
M. C. de Sousa, F. Doveil, Y. Elskens +1
We investigate the interaction of electromagnetic waves and electron beams in a 4 meters long traveling wave tube (TWT). The device is specially designed to simulate beam-plasma ex…
Cross-field chaotic transport of electrons by ExB electron drift instability in Hall thruster
D. Mandal, Y. Elskens, N. Lemoine +1
A model calculation is presented to characterize the anomalous cross-field transport of electrons in a Hall thruster geometry. The anomalous nature of the transport is attributed t…
DIMOHA: A Time-Domain Algorithm for Traveling-Wave Tube Simulations
Damien Minenna, Yves Elskens, Frédéric André +3
To simulate traveling-wave tubes (TWTs) in time domain and more generally the wave-particle interaction in vacuum devices, we developed the DIscrete MOdel with HAmiltonian approach…
Cross-field chaotic transport of electrons by electron drift instability in Hall thrusters
Debraj Mandal, Yves Elskens, Nicolas Lemoine +1
One special interest for the industrial development of Hall thruster is characterizing the anomalous cross-field electron transport observed after the channel exit. Since the ioniz…
Universality of the Abraham-Minkowski dilemma for photon momenta beyond dielectric materials
Damien Minenna, Yves Elskens, Fabrice Doveil +1
The authors) Whenever light is slowed down, for any cause, two different formulas give its momentum. For dielectrics, the coexistence of those momenta was the heart of the century-…
Electromagnetic power and momentum in N-body hamiltonian approach to wave-particle dynamics in a periodic structure
Damien Minenna, Yves Elskens, Frédéric André +1
To model momentum exchange in nonlinear wave-particle interaction, as in amplification devices like traveling-wave tubes, we use an -body self-consistent hamiltonian description…
Comparison Between Pierce Equivalent Circuit and Recent Discrete Model for Traveling-Wave Tubes
Damien Minenna, Artem Terentyuk, Frédéric André +2
To perform accurate numerical simulations of the traveling-wave tube in time domain, a new approach using field decomposition with large reduction of degrees-of-freedom has been pr…
Low frequency resistive instability in a dusty Hall thruster plasma
Jasvendra Tyagi, Hitendra Malik, Yves Elskens +2
Along with crossed electric and magnetic fields in a Hall thruster, a radial component of electric field is generated that takes ions toward the walls, which causes sputtering and…
Phase mixing importance for both Landau instability and damping
Daniel Santos, Yves Elskens
We discuss the self-consistent dynamics of plasmas by means of hamiltonian formalism for a system of near-resonant electrons interacting with a single Langmuir wave. The connec…
On frequency and time domain models of traveling wave tubes
Stéphane Théveny, Frédéric André, Yves Elskens
We discuss the envelope modulation assumption of frequency-domain models of traveling wave tubes (TWTs) and test its consistency with the Maxwell equations. We compare the predicti…
N-body description of Debye shielding and Landau damping
D. F. Escande, F. Doveil, Yves Elskens
This paper brings further insight into the recently published N-body description of Debye shielding and Landau damping [Escande D F, Elskens Y and Doveil F 2014 Plasma Phys. Contro…
Direct path from microscopic mechanics to Debye shielding, Landau damping, and wave-particle interaction
Dominique F. Escande, Yves Elskens, Fabrice Doveil
The derivation of Debye shielding and Landau damping from the -body description of plasmas is performed directly by using Newton's second law for the -body system. This is do…
Uniform derivation of Coulomb collisional transport thanks to Debye shielding
Dominique F. Escande, Yves Elskens, Fabrice Doveil
The effective potential acting on particles in plasmas being essentially the Debye-shielded Coulomb potential, the particles collisional transport in thermal equilibrium is calcula…
Vlasov equation and -body dynamics - How central is particle dynamics to our understanding of plasmas?
Yves Elskens, D. F. Escande, Fabrice Doveil
Difficulties in founding microscopically the Vlasov equation for Coulomb-interacting particles are recalled for both the statistical approach (BBGKY hierarchy and Liouville equatio…
New foundations and unification of basic plasma physics by means of classical mechanics
Dominique F. Escande, Fabrice Doveil, Yves Elskens
The derivation of Debye shielding and Landau damping from the -body description of plasmas requires many pages of heavy kinetic calculations in classical textbooks and is done i…
Basic microscopic plasma physics unified and simplified by N-body classical mechanics
Dominique Escande, Fabrice Doveil, Yves Elskens
Debye shielding, collisional transport, Landau damping of Langmuir waves, and spontaneous emission of these waves are introduced, in typical plasma physics textbooks, in different…
Self-consistency vanishes in the plateau regime of the bump-on-tail instability
Dominique F. Escande, Yves Elskens
Using the Vlasov-wave formalism, it is shown that self-consistency vanishes in the plateau regime of the bump-on-tail instability if the plateau is broad enough. This shows that, i…
Quasilinear diffusion for the chaotic motion of a particle in a set of longitudinal waves
D. F. Escande, Y. Elskens
The rigorous analytical calculation of the diffusion coefficient is performed for the chaotic motion of a particle in a set of longitudinal waves with random phases and large ampli…
Long-time discrete particle effects versus kinetic theory in the self-consistent single-wave model
M-C. Firpo, F. Doveil, Y. Elskens +3
The influence of the finite number N of particles coupled to a monochromatic wave in a collisionless plasma is investigated. For growth as well as damping of the wave, discrete par…