Results 31 to 40 of about 1,427,824 (243)

Investigation Of Plasma Stability Of The Prototype Plasma Lens For Positron Matching [PDF]

EPJ Web of Conferences
The quest for novel technologies in the ever-evolving landscape of scientific exploration has led to the investigation of plasma lensing as a potential solution for optical matching devices for all kinds of positron sources.
Hamann Niclas, Jones Harry, Loisch Gregor, Formela Manuel, Ludwig Kai, Osterhoff Jens, Moortgat-Pick Gudrid   +6 more
doaj   +1 more source

Approximation of radial structure of unstable ion-sound modes in rotating magnetized plasma column by eikonal equation

Discrete and Continuous Models and Applied Computational Science, 2022
The problem of the correct asymptotic construction of the radial structure of linearly unstable ion-sound electrostatic eigenmodes is studied. The eigenvalue problem with boundary conditions of the first and second kind (electrodynamic and hydrodynamic ...
Nikita A. Marusov
doaj   +1 more source

Nongyrotropic particle distributions in space plasmas [PDF]

Annales Geophysicae, 1999
In nonstationary, strong inhomogeneous or open plasmas particle orbits are rather complicated. If the nonstationary time scale is smaller than the gyration period, if the inhomogeneity scale is smaller than the gyration radius, i.e. at magnetic plasma
U. Motschmann, U. Motschmann, U. Motschmann, K. H. Glassmeier, A. L. Brinca   +4 more
doaj   +1 more source

Generalized chiral instabilities, linking numbers, and non-invertible symmetries

Journal of High Energy Physics, 2023
We demonstrate a universal mechanism of a class of instabilities in infrared regions for massless Abelian p-form gauge theories with topological interactions, which we call generalized chiral instabilities.
Naoki Yamamoto, Ryo Yokokura
doaj   +1 more source

Spatiotemporal dynamics of ultrarelativistic beam-plasma instabilities

Physical Review Research, 2022
An electron or electron-positron beam streaming through a plasma is notoriously prone to microinstabilities. For a dilute ultrarelativistic infinite beam, the dominant instability is a mixed mode between longitudinal two-stream and transverse ...
P. San Miguel Claveria, X. Davoine, J. R. Peterson, M. Gilljohann, I. Andriyash, R. Ariniello, C. Clarke, H. Ekerfelt, C. Emma, J. Faure, S. Gessner, M. J. Hogan, C. Joshi, C. H. Keitel, A. Knetsch, O. Kononenko, M. Litos, Y. Mankovska, K. Marsh, A. Matheron, Z. Nie, B. O'Shea, D. Storey, N. Vafaei-Najafabadi, Y. Wu, X. Xu, J. Yan, C. Zhang, M. Tamburini, F. Fiuza, L. Gremillet, S. Corde   +31 more
doaj   +1 more source

White-Light Parametric Instabilities in Plasmas [PDF]

Physical Review Letters, 2007
Parametric instabilities driven by partially coherent radiation in plasmas are described by a generalized statistical Wigner-Moyal set of equations, formally equivalent to the full wave equation, coupled to the plasma fluid equations. A generalized dispersion relation for Stimulated Raman Scattering driven by a partially coherent pump field is derived,
Bingham, R., Santos, J.E., Silva, L.O.
openaire   +5 more sources

Kelvin-Helmholtz vortices and secondary instabilities in super-magnetosonic regimes [PDF]

Annales Geophysicae, 2011
The nonlinear behaviour of the Kelvin-Helmholtz instability is investigated with a two-fluid simulation code in both sub-magnetosonic and super-magnetosonic regimes in a two-dimensional configuration chosen so as to represent typical conditions ...
F. Palermo, M. Faganello, F. Califano, F. Pegoraro   +3 more
doaj   +1 more source

Thin-shell instability in collisionless plasma [PDF]

Physical Review E, 2015
The thin-shell instability has been named as one process, which can generate entangled structures in astrophysical plasma on collisional (fluid) scales. It is driven by a spatially varying imbalance between the ram pressure of the inflowing upstream plasma and the downstream's thermal pressure at a non-planar shock.
Dieckmann, M. E., Ahmed, H., Doria, D., Sarri, G., Walder, R., Folini, D., Bret, A., Ynnerman, A., Borghesi, M.   +8 more
openaire   +5 more sources

Parametric Instability: An Evolutive Mechanism for the Alfvénic Turbulence in the Solar Wind

Universe, 2022
Fluctuations in fast streams or in slow Alfvénic streams of the solar wind, and in the high-latitude wind, are characterized by high cross-helicity and a low level of compressions.
Francesco Malara, Leonardo Primavera, Pierluigi Veltri   +2 more
doaj   +1 more source

Vibrational Modes and Instabilities of a Dust Particle Pair in a Complex Plasma

, 2010
Vibrational modes and instabilities of a dust-particle pair in a terrestrial aboratory complex plasma are investigated by employing an analytical method whereby the plasma wakefield induced by an external electric field is modeled using an image-charge ...
Qiao, Ke, Matthews, Lorin Swint., Hyde, Truell Wayne., Qiao, Ke.   +3 more
core   +1 more source