Navegação Ciências Exatas e da Terra por Assunto "Feixes de eletrons"

Resultados 1-5 de 5

    • Coherent and incoherent radiation from free-electron lasers with an axial guide field 

      Freund, Henry P.; Sprangle, P.; Dillenburg, Darcy; Jornada, Eda Homrich da; Liberman, Bernardo; Schneider, Ruth de Souza (1981) [Artigo de periódico]
      The spontaneous and induced emission from a free-electron laser is treated for the case in which an axial magnetic field is imposed in addition to the helical, axially periodic wiggler magnetic field. The classes of possible ...

    • Ferromagnetic resonance of fe(111)/cu(111)multilayers 

      Rezende, Sergio Machado; Moura, J.A.S.; Aguiar, F.M. de; Schreiner, Wido Herwig (1994) [Artigo de periódico]
      Ferromagnetic resonance at 9.4 GHz has been used to characterize several samples of Fe sing1e-crystal films and Fe/Cu multilayers prepared by electron-beam deposition on HF-etched, hydrogen-terminated Si(111). Resonance ...

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

      Pavan, Joel; Ziebell, Luiz Fernando; Yoon, Peter H.; Gaelzer, Rudi (2010) [Artigo de periódico]
      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 ...

    • Maser-beam instability of Bernstein waves 

      Ziebell, Luiz Fernando; Yoon, Peter H.; Wu, C.S. (2000) [Artigo de periódico]
      The present study constitutes a continuation and improvement of the preceding work by Yoon et al. [J. Geophys. Res. 104, 19801 (1999)]. In the present discussion, an instability of Bernstein waves excited by a beam of ...

    • Two-dimensional time evolution of beam-plasma instability in the presence of binary collisions 

      Ferrão, Sabrina Tigik; Ziebell, Luiz Fernando; Yoon, Peter H.; Kontar, Eduard (2016) [Artigo de periódico]
      Energetic electrons produced during solar flares are known to be responsible for generating solar type III radio bursts. The radio emission is a byproduct of Langmuir wave generation via beam-plasma interaction and nonlinear ...