105 citations · 390 across the 15 of their papers we have counts for
15 papers
Plasma turbulence driven by wave-hole interaction
Gabriele Celebre, Mario Imbrogno, Sergio Servidio +1
Wave-obstacle diffraction is, par excellence, an example of transition to nonlinearity, generating turbulence and complexity in fluids. We present an idealized kinetic plasma regim…
Numerical investigation of kinetic instabilities in BGK equilibria under collisional effects
Sofia Zanelli, Gabriele Celebre, Sergio Servidio +1
An unstable one-dimensional Bernstein-Greene-Kruskal (BGK) mode has been studied through high-precision numerical simulations. The initial turbulent, periodic equilibrium state is…
Flat-top electron velocity distributions driven by wave-particle resonant interactions
Sofia Zanelli, Silvia Perri, Martina Condoluci +6
The role of kinetic electrons in the excitation and sustainment of ion-bulk electrostatic waves in collisionless plasmas is investigated, with a focus on the physical mechanisms re…
On the decay instability of electron acoustic waves
F. Valentini, T. M. O'Neil, D. H. Dubin
Electron acoustic waves (EAWs) are nonlinear plasma modes characterized by electron trapping, which suppresses the usual Landau damping. Despite being predicted in the 1990s, their…
A study of the transition to a turbulent shock using a coarse-graining approach to ion phase space transport
D. Trotta, F. Valentini, D. Burgess +1
Shocks and turbulence are ubiquitous phenomena, responsible for particle acceleration to very high energies in a large collection of astrophysical systems. Using self-consistent, h…
Energy conversion in turbulent weakly-collisional plasmas: Eulerian Hybrid Vlasov-Maxwell simulations
O. Pezzi, Y. Yang, F. Valentini +4
Kinetic simulations based on the Eulerian Hybrid Vlasov-Maxwell (HVM) formalism permit the examination of plasma turbulence with useful resolution of the proton velocity distributi…
Fourier-Hermite decomposition of the collisional Vlasov-Maxwell system: implications for the velocity space cascade
Oreste Pezzi, Francesco Valentini, Sergio Servidio +2
Turbulence at kinetic scales is an unresolved and ubiquitous phenomenon that characterizes both space and laboratory plasmas. Recently, new theories, {\it in-situ} spacecraft obser…
Fluid simulations of plasma turbulence at ion scales: comparison with Vlasov-Maxwell simulations
D. Perrone, T. Passot, D. Laveder +5
Comparisons are presented between a hybrid Vlasov-Maxwell (HVM) simulation of turbulence in a collisionless plasma and fluid reductions. These include Hall-magnetohydrodynamics (HM…
Revisiting a classic: the Parker-Moffatt problem
O. Pezzi, T. N. Parashar, S. Servidio +6
The interaction of two colliding Alfvén wave packets is here described by means of magnetohydrodynamics (MHD) and hybrid kinetic numerical simulations. The MHD evolution revisits t…
Transition to kinetic turbulence at proton scales driven by large-amplitude Kinetic Alfvèn fluctuations
F. Valentini, C. L. Vasconez, O. Pezzi +3
Space plasmas are dominated by the presence of large-amplitude waves, large-scale inhomogeneities, kinetic effects and turbulence. Beside the homogeneous turbulence, generation of…
Kinetic Alfvén waves generation by large-scale phase-mixing
C. L. Vasconez, F. Pucci, F. Valentini +3
One view of the solar-wind turbulence is that the observed highly anisotropic fluctuations at spatial scales near the proton inertial length may be considered as Kinetic Alfv…
Vlasov simulations of Kinetic Alfvén Waves at proton kinetic scales
C. L. Vasconez, F. Valentini, E. Camporeale +1
Kinetic Alfvén waves represent an important subject in space plasma physics, since they are thought to play a crucial role in the development of the turbulent energy cascade in the…
Proton Kinetic Effects in Vlasov and Solar Wind Turbulence
S. Servidio, K. T. Osman, F. Valentini +5
Kinetic plasma processes have been investigated in the framework of solar wind turbulence, employing Hybrid Vlasov-Maxwell (HVM) simulations. The dependency of proton temperature a…
Response to Comment on `Undamped electrostatic plasma waves' [Phys. Plasmas 19, 092103 (2012)]
F. Valentini, D. Perrone, F. Califano +4
Numerical and experimental evidence is given for the occurrence of the plateau states and concomitant corner modes proposed in \cite{valentini12}. It is argued that these states pr…
Undamped electrostatic plasma waves
F. Valentini, D. Perrone, F. Califano +4
Electrostatic waves in a collision-free unmagnetized plasma of electrons with fixed ions are investigated for electron equilibrium velocity distribution functions that deviate slig…