Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Ziebell, Luiz Fernando"'
Autor:
Gaelzer, Rudi, Ziebell, Luiz Fernando
We study the effects of the velocity distribution functions of the plasma particles on the equilibrium charge of dust grains, acquired through inelastic collisions of the particles with the grains. This paper is the second in a series of two papers o
Externí odkaz:
http://arxiv.org/abs/2411.05630
Autor:
Ziebell, Luiz Fernando, Gaelzer, Rudi
We study the effect of the velocity distributions of the plasma particles on the equilibrium charge of dust particles which suffer collisional charging, considering different forms of both isotropic and anisotropic Kappa distributions for ions and el
Externí odkaz:
http://arxiv.org/abs/2411.03536
In this work, we derive a dispersion equation that describes the excitation of the oblique (or Alfv\'en) firehose instability in a plasma that contains both electron and ion species modelled by bi-kappa velocity distribution functions. The equation i
Externí odkaz:
http://arxiv.org/abs/1809.10597
In this paper we derive the dielectric tensor for a plasma containing particles described by an anisotropic superthermal (bi-kappa) velocity distribution function. The tensor components are written in terms of the two-variables kappa plasma special f
Externí odkaz:
http://arxiv.org/abs/1605.00279
Autor:
Gaelzer, Rudi, Ziebell, Luiz Fernando
Velocity distribution functions (VDFs) that exhibit a power-law dependence on the high-energy tail have been the subject of intense research by the plasma physics community. Such functions, known as kappa or superthermal distributions, have been foun
Externí odkaz:
http://arxiv.org/abs/1511.05510
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
The characteristics of Alfvén waves propagating in a direction oblique to the ambient magnetic field in a stellar wind environment are discussed. A kinetic formulation for a magnetized dusty plasma is adopted considering Maxwellian distributions of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::79051615585fe595fa10c4967e105f8b
Autor:
Ziebell, Luiz Fernando
Publikováno v:
Biblioteca Digital de Teses e Dissertações da UFRGSUniversidade Federal do Rio Grande do SulUFRGS.
Realizamos um estudo teórico dos processos de emissão e absorção de radiação de ciclotron em plasmas magnetizados. Apresentamos uma revisão geral da teoria, iniciando por seus aspectos mais básicos: estudamos a radiação emitida por um elét
Externí odkaz:
http://hdl.handle.net/10183/149705
Autor:
Ziebell, Luiz Fernando
Publikováno v:
Biblioteca Digital de Teses e Dissertações da UFRGSUniversidade Federal do Rio Grande do SulUFRGS.
A emissão amplificada de radiação de ciclotron eletrônica com freqüência próxima da fundamental provinda de uma lãmina de plasma inomogêneo e anisotrópico é investigada por meio de MN teoria linear. Os efeitos de polarização do plasma s
Externí odkaz:
http://hdl.handle.net/10183/29711
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
The plasma emission process, which is the mechanism for solar type II and type III radio burst phenomena, is studied by means of particle-in-cell (PIC) and weak turbulence (WT) simulation methods. “Plasma emission” is meant as a loose description
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::49fe2bf40980c5634f940f25104237fc
Autor:
Ferrão, Sabrina Tigik, Petruzzellis, Larissa Teixeira, Ziebell, Luiz Fernando, Yoon, Peter H., Gaelzer, Rudi
Publikováno v:
Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
Observations show that plasma particles in the solar wind frequently display power-law velocity distributions, which can be isotropic or anisotropic. Particularly, the velocity distribution functions of solar wind electrons are frequently modeled as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______3056::7edf55740e6c70509caa62b17873e1c2