Browsing by Author "Pavan, Joel"

Now showing items 1-16 of 16

    • Dinâmica não-linear da instabilidade feixe-plasma biodimensional 

      Pavan, Joel (2011) [Thesis]
      O presente trabalho desenvolve a abordagem bidimensional, tanto no espaço de velocidades como no espaço de número de onda, para determinar a evolução temporal dos modos eletrostáticos íon-sônico e de Langmuir, e das ...

    • Efeitos de gradientes perpendiculares na amplificação da radiação quilométrica das auroras 

      Pavan, Joel (2007) [Dissertation]
      A in uência do caráter inomogêneo da região-fonte na ampli cação da Radiação Quilom étrica das Auroras é investigada. Inicialmente é feita uma revisão de trabalhos relevantes publicados a respeito do mesmo tema geral, tanto ...

    • Electromagnetic weak turbulence theory revisited 

      Yoon, Peter H.; Ziebell, Luiz Fernando; Gaelzer, Rudi; Pavan, Joel (2012) [Journal article]
      The statistical mechanical reformulation of weak turbulence theory for unmagnetized plasmas including fully electromagnetic effects was carried out by Yoon [Phys. Plasmas 13, 022302 (2006)]. However, the wave kinetic ...

    • Evolução não linear da instabilidade feixe-plasma 

      Barbosa, Marcos Vinicius Grala (2013) [Abstract published in event]

    • Ionospheric ion-acoustic enhancements by turbulent counterstreaming electron beam-plasma interaction 

      Pavan, Joel; Ziebell, Luiz Fernando; Yoon, Peter H.; Gaelzer, Rudi (2010) [Journal article]
      Ion-acoustic enhancements are investigated within the context of turbulent beam-plasma interaction processes. The analysis assumes a pair of counterstreaming electron beams interacting with the background plasma. Two-dimensional ...

    • Nonlinear evolution of beam-plasma instability in inhomogeneous medium 

      Ziebell, Luiz Fernando; Yoon, Peter H.; Pavan, Joel; Gaelzer, Rudi (2011) [Journal article]
      The problem of electron-beam propagation in inhomogeneous solar wind is intimately related to the solar type II and/or type III radio bursts. Many scientists have addressed this issue in the past bymeans of quasi-linear ...

    • Particle-in-cell simulations on spontaneous thermal magnetic field fluctuations 

      Simões Júnior, Fernando Jaques Ruiz; Pavan, Joel; Gaelzer, Rudi; Ziebell, Luiz Fernando; Yoon, Peter H. (2013) [Journal article]
      In this paper an electromagnetic particle code is used to investigate the spontaneous thermal emission. Specifically we perform particle-in-cell simulations employing a non-relativistic isotropic Maxwellian particle ...

    • Plasma emission by counter-streaming electron beams 

      Ziebell, Luiz Fernando; Petruzzellis, Larissa Teixeira; Yoon, Peter H.; Gaelzer, Rudi; Pavan, Joel (2016) [Journal article]
      The radiation emission mechanism responsible for both type-II and type-III solar radio bursts is commonly accepted as plasma emission. Recently Ganse et al. suggested that type-II radio bursts may be enhanced when the ...

    • Plasma emission by nonlinear electromagnetic processes 

      Ziebell, Luiz Fernando; Yoon, Peter H.; Petruzzellis, Larissa Teixeira; Gaelzer, Rudi; Pavan, Joel (2015) [Journal article]
      The plasma emission, or electromagnetic (EM) radiation at the plasma frequency and/or its harmonic(s), is generally accepted as the radiation mechanism responsible for solar type II and III radio bursts. Identification and ...

    • Plasma emission by weak turbulence processes 

      Ziebell, Luiz Fernando; Yoon, Peter H.; Gaelzer, Rudi; Pavan, Joel (2014) [Journal article]
      The plasma emission is the radiation mechanism responsible for solar type II and type III radio bursts. The first theory of plasma emission was put forth in the 1950s, but the rigorous demonstration of the process based ...

    • Propriedades dielétricas de plasmas não-homogêneos 

      Pavan, Joel (2005) [Abstract published in event]

    • Solar wind strahl broadening by self-generated plasma waves 

      Pavan, Joel; Figueroa Viñas, Adolfo; Yoon, Peter H.; Ziebell, Luiz Fernando; Gaelzer, Rudi (2013) [Journal article]
      This Letter reports on the results of numerical simulations which may provide a possible explanation for the strahl broadening during quiet solar conditions. The relevant processes involved in the broadening are due to ...

    • Spontaneous emission of electromagnetic radiation in turbulent plasmas 

      Ziebell, Luiz Fernando; Yoon, Peter H.; Simões Júnior, Fernando Jaques Ruiz; Gaelzer, Rudi; Pavan, Joel (2014) [Journal article]
      Known radiation emission mechanisms in plasmas include bremmstrahlung (or free-free emission), gyro- and synchrotron radiation, cyclotron maser, and plasma emission. For unmagnetized plasmas, only bremmstrahlung and plasma ...

    • O trabalhador em radiodiagnóstico e seu ambiente de trabalho 

      Brombatti, Lizandreia; Bosio, Marcelo; Jesus, Joao Carlos Batista de; Silva, Jorge L.G. da; Dutra, Jose Mauricio Saraiva; Marcon, Edson Luiz; Pavan, Joel; Moro, Jose Tullio (1995) [Abstract published in event]

    • O trabalhador em radiodiagnóstico e seu ambiente de trabalho 

      Brombatti, Lizandréia; Bosio, Marcelo; Jesus, João C.B. de; Silva, Jorge L.G. da; Dutra, José M.; Marcon, Edson L.; Pavan, Joel; Moro, José T. (1995) [Abstract published in event]

    • Transition from thermal to turbulent equilibrium with a resulting electromagnetic spectrum 

      Ziebell, Luiz Fernando; Yoon, Peter H.; Gaelzer, Rudi; Pavan, Joel (2014) [Journal article]
      A recent paper [Ziebell et al., Phys. Plasmas 21, 010701 (2014)] discusses a new type of radiation emission process for plasmas in a state of quasi-equilibrium between the particles and enhanced Langmuir turbulence. Such ...