D. Grasso
YOU?
Author Swipe
View article: Kelvin-Helmholtz instability driven by asymmetry effects in chaotic magnetic configurations
Kelvin-Helmholtz instability driven by asymmetry effects in chaotic magnetic configurations Open
The Kelvin-Helmholtz instability has been shown (in Grasso et al., Phys. Plasmas, 2020 ) to develop in asymmetric magnetic configurations, where only a single helicity mode is present. Asymmetric configurations are commonly encountered in …
View article: Post disruption reconnection event driven by a runaway current
Post disruption reconnection event driven by a runaway current Open
The role of a runaway current in a post disruption plasma is investigated through numerical simulations in an asymmetric magnetic reconnection event. While the runaways do not alter the linear growth of the island, they lead to a rotation …
View article: STRUCTURES OF VORTEXES NEAR THE POLES OF PLANETS OF THE SOLAR SYSTEM
STRUCTURES OF VORTEXES NEAR THE POLES OF PLANETS OF THE SOLAR SYSTEM Open
In the vicinity of the poles of the planets of the solar system, ordered crystals of vortices and intermittency are observed. The formation of vortex structures in the vicinity of the poles of the planets of the solar system is investigate…
View article: Investigation of the collisionless plasmoid instability based on gyrofluid and gyrokinetic integrated approach
Investigation of the collisionless plasmoid instability based on gyrofluid and gyrokinetic integrated approach Open
In this work, the development of two-dimensional current sheets with respect to tearing modes, in collisionless plasmas with a strong guide field, is analysed. During their nonlinear evolution, these thin current sheets can become unstable…
View article: Stability of a weakly collisional plasma with runaway electrons
Stability of a weakly collisional plasma with runaway electrons Open
We investigate the problem of the tearing stability of a post-disruption weakly collisional plasma where the current is completely carried by runaway electrons. We adopt here a two fluid model which takes into account also ion sound Larmor…
View article: Marginally stable current sheets in collisionless magnetic reconnection
Marginally stable current sheets in collisionless magnetic reconnection Open
Noncollisional current sheets that form during the nonlinear development of spontaneous magnetic reconnection are characterized by a small thickness, of the order of the electron skin depth. They can become unstable to the formation of pla…
View article: Twig-like middle cerebral artery in a case of neurofibromatosis type 1.
Twig-like middle cerebral artery in a case of neurofibromatosis type 1. Open
Neurofibromatosis type 1 (NF1) is an autosomal dominant genetic disorder with multisystemic involvement, affecting central nervous system, skin, bone system and vessels, with a very heterogeneous clinical presentation. Vascular abnormaliti…
View article: Fluid and gyrokinetic simulations of plasmoid formation in collisionless plasmas
Fluid and gyrokinetic simulations of plasmoid formation in collisionless plasmas Open
International audience
View article: Marginally Stable Current Sheets in Collisionless Magnetic Reconnection
Marginally Stable Current Sheets in Collisionless Magnetic Reconnection Open
Non-collisional current sheets that form during the nonlinear development of magnetic reconnection are characterized by a small thickness, of the order of the electron skin depth. They can become unstable to the formation of plasmoids, whi…
View article: Coexistence of Plasmoid and Kelvin–Helmholtz Instabilities in Collisionless Plasma Turbulence
Coexistence of Plasmoid and Kelvin–Helmholtz Instabilities in Collisionless Plasma Turbulence Open
The plasmoid formation in collisionless plasmas, where magnetic reconnection within turbulence may take place driven by the electron inertia, is analyzed. We find a complex situation in which, due to the presence of strong velocity shears,…
View article: Gyrofluid analysis of electron $\beta_e$ effects on collisionless reconnection
Gyrofluid analysis of electron $\beta_e$ effects on collisionless reconnection Open
International audience
View article: Impact of electron temperature anisotropy on the collisionless tearing mode instability in the presence of a strong guide field
Impact of electron temperature anisotropy on the collisionless tearing mode instability in the presence of a strong guide field Open
We derive and analyze a dispersion relation for the growth rate of collisionless tearing modes, driven by electron inertia and accounting for equilibrium electron temperature anisotropy in a strong guide field regime. For this purpose, a n…
View article: Impact of electron temperature anisotropy on the collisionless tearing\n mode instability in the presence of a strong guide field
Impact of electron temperature anisotropy on the collisionless tearing\n mode instability in the presence of a strong guide field Open
We derive and analyze a dispersion relation for the growth rate of\ncollisionless tearing modes, driven by electron inertia and accounting for\nequilibrium electron temperature anisotropy in a strong guide field regime. For\nthis purpose, …
View article: Solar and Interplanetary Turbulence: Lagrangian Coherent Structures
Solar and Interplanetary Turbulence: Lagrangian Coherent Structures Open
<p>The dynamics of solar and interplanetary plasmas is governed by coherent structures such as current sheets and magnetic flux ropes which are responsible for the genesis of intermittent turbulence via magnetic reconnections in sola…
View article: Asymmetry effects driving secondary instabilities in two-dimensional collisionless magnetic reconnection
Asymmetry effects driving secondary instabilities in two-dimensional collisionless magnetic reconnection Open
In the framework of the studies on magnetic reconnection, much interest has been recently devoted to asymmetric magnetic configurations, which can naturally be found in solar and astrophysical environments and in laboratory plasmas. Severa…
View article: P562 Nocturnal enuresis in children: medical comorbidities
P562 Nocturnal enuresis in children: medical comorbidities Open
Objective To evaluate the characteristics of patients with NE. Design It is a cross-sectional study. Setting During the physical examination, we sought signs and symptoms of voiding disorders and comorbidities with precise questions posed …
View article: Lagrangian Coherent Structures as a new frame to investigate the particle transport in highly chaotic magnetic systems
Lagrangian Coherent Structures as a new frame to investigate the particle transport in highly chaotic magnetic systems Open
The concept of Lagrangian Coherent Structures (LCS) is here applied to investigate in a new perspective the particles transport in chaotic magnetic configurations. A paradigmatic and simplified magnetic configuration is revisited before ex…
View article: A reduced Landau-gyrofluid model for magnetic reconnection driven by electron inertia
A reduced Landau-gyrofluid model for magnetic reconnection driven by electron inertia Open
An electromagnetic reduced gyrofluid model for collisionless plasmas, accounting for electron inertia, finite ion Larmor radius effects and Landau-fluid closures for the electron fluid is derived by means of an asymptotic expansion from a …
View article: Coherent transport structures in magnetized plasmas. I. Theory
Coherent transport structures in magnetized plasmas. I. Theory Open
In a pair of linked articles (called Papers I and II, respectively), we apply the concept of Lagrangian Coherent Structures (LCSs) borrowed from the study of dynamical systems to magnetic field configurations in order to separate regions w…
View article: Physics conditions for robust control of tearing modes in a rotating tokamak plasma
Physics conditions for robust control of tearing modes in a rotating tokamak plasma Open
SPC
View article: Open problems of magnetic island control by electron cyclotron current drive
Open problems of magnetic island control by electron cyclotron current drive Open
This paper reviews key aspects of the problem of magnetic islands control by electron cyclotron current drive in fusion devices. On the basis of the ordering of the basic spatial and time scales of the magnetic reconnection physics, we pre…
View article: Visco-resistive plasmoid instability
Visco-resistive plasmoid instability Open
The plasmoid instability in visco-resistive current sheets is analyzed in both the linear and nonlinear regimes. The linear growth rate and the wavenumber are found to scale as S1/4(1+Pm)−5/8 and S3/8(1+Pm)−3/16 with respect to the Lundqui…