Browsing by Author "ee47d04e-ac7b-4e9e-b9d7-1b5138d928e5"
Now showing items 1-20 of 40
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Gomberoff, L.; Gomberoff, K. (1992)It is shown that in a current-carrying cylindrical plasma with a free boundary, resistivity and thermal conductivity can lead to large-scale steady convection. Convection can take place for any azimuthal wave number m, ...
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Gomberoff, L.; Araneda, J. A. (2001)It is shown that damping effects can destabilize regions that are stable under non-dissipative fluid theory. Damping effects on the ion-acoustic modes are simulated by a collisional-like term in the longitudinal component ...
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Gomberoff, L.; Hoyos, J.; Brinca, A. L. (Blackwell Publishing Ltd, 2003)In a previous paper, sufficiently large-amplitude and left-handed ‘‘pump waves’’ propagating parallel to the background magnetic field were shown to stabilize a moderately dense beam in a proton plasma against the ...
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Gomberoff, K.; Gomberoff, L. (1992)The effect of Hall currents on the steady convection of a fully ionized current‐carrying cylindrical plasma column surrounded by perfectly conducting walls is studied. In general, when the Hall term is large, it can affect ...
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Gomberoff, L. (Blackwell Publishing Ltd, 2006)It is shown that nonlinear left-hand polarized waves can either stabilize or destabilize linear right-hand polarized instabilities triggered by an alpha particle beam in a magnetized electron proton plasma. For differential ...
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Astudillo, H. F.; Gomberoff, L.; Hernádez M, R. (Blackwell Publishing Ltd, 1998)We study the stability of electromagnetic waves for nongyrotropic velocity distribution functions in a solar-wind-like plasma. The dispersion relation is solved numerically in closed form. On the basis of recently reported ...
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Gnavi, G.; Gomberoff, L.; Gratton, F. T.; Galvão, R. M.O. (1996)We study the stability of the cold-plasma dispersion relation for circularly polarized waves in a plasma composed of an ion background and an ion beam. The presence of the beam introduces a resonant branch into the dispersion ...
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Gomberoff, L.; Astudillo, H. F. (1998)It is well known that ion beam-plasma interactions can destabilize right- and left-hand polarized electromagnetic waves. However, these instabilities have been studied for frequencies less than the ion-beam gyrofrequency, ...
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Gomberoff, L.; Hoyos, J.; Brinca, A. L.; Ferrer, R. (Blackwell Publishing Ltd, 2004)We study the effect of a large-amplitude left-hand polarized wave on ion acoustic instabilities. We show that the presence of a finite amplitude left-hand polarized wave produces electrostatic instabilities above a threshold ...
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Gomberoff, L. (Blackwell Publishing Ltd, 2008)Alfvén/ion-cyclotron waves have been observed in several regions of the magnetosphere. Parametric decays of finite amplitude Alfvén/ion- cyclotron waves in the presence of He+ ions and a mixed population of thermal and hot ...
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Gomberoff, L.; Gomberoff, K.; Deutsch, A. (2010)Nonlinear electrostatic instabilities have been shown to occur frequently and under very different conditions in plasma with two ion beams such as the fast solar wind. These instabilities can be triggered when the phase ...
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Gratton, F. T.; Gnavi, G.; Galvão, R. M.O.; Gomberoff, L. (1997)We study the modulational instability of an electron-positron plasma with relativistic temperatures and phonon damping. It is shown that when the phonon damping is O (1) or O (ε), a modulational instability appears even ...
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Gomberoff, L.; Tolmachev, V. (1971)A new approach to the bound-state problem in the frame of quantum electrodynamics is proposed, with special emphasis on the electron-proton bound states. It is an alternative approach to the usual one, which is based on ...
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Gomberoff, L.; Hernández, R.; Livi, S. (1995)Recent observations on board the Ulysses spacecraft show the presence of high velocity “tails” in the proton distribution functions as well as in heavier ion velocity distributions such as alpha particles and oxygen ions. ...
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Gomberoff, L. (Blackwell Publishing Ltd, 2000)It is well known that in plasmas with β = (νs/νA)2 < 1 (νs is the ion acoustic velocity and νA is the Alfvén velocity), Alfvén waves propagating along an external magnetic field can have three kinds of parametric ...
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Gomberoff, L.; Gomberoff, K.; Brinca, A. L. (Blackwell Publishing Ltd, 2001)We study ion acoustic damping effects on parametric decays of right-hand-polarized electromagnetic waves. We do this because ion beams have been observed in a variety of space environments, and consequently, these waves ...
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Gomberoff, L.; Hoyos, J.; Brinca, A. L. (Blackwell Publishing Ltd, 2005)[1] It is shown that ion-acoustic waves propagating along an external magnetic field and generated by parametric decays of circularly polarized finite amplitude waves have the properties of ion-acoustic waves observed ...
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Gomberoff, L. (Blackwell, 2006)We consider a fast solar wind-type plasma consisting of electrons, a protons background, and a much more tenuous alpha particle beam. It is shown that such system is unstable against ion acoustic-like waves triggered by ...
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Gomberoff, L.; Valdivia Hepp, Juan (Blackwell Publishing Ltd, 2003)In a recent study of ion cyclotron waves generated by the thermal anisotropy of oxygen ions, it was shown that the heavy ion drift velocity and a large thermal anisotropy of the heavy ions can destabilize proton-cyclotron ...
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Gomberoff, L. (Blackwell Publishing Ltd, 2006)Nonlinear ion-acoustic like waves triggered by large-amplitude circularly polarized waves propagating in the direction of a proton beam are studied. The properties are strongly dependent on the nature of the large-amplitude ...