منابع مشابه
Heating of beam ions by ion acoustic waves
Satellite measurements show that ion beams above the auroral acceleration region are heated to hundreds of eV in a direction perpendicular to the magnetic ®eld. We show that ion acoustic waves may be responsible for much of this heating. Even in the absence of a positive slope in the velocity distribution of the beam ions, ion acoustic waves can be generated by a fan instability. We present ana...
متن کاملHeating of ions by Alfvén waves via nonresonant interactions.
Finite-amplitude intrinsic Alfvén waves exist pervasively in astrophysical and solar-terrestrial environment. It is generally believed that linear wave-particle resonant interaction between thermal protons and Alfvén waves is ineffective when the proton beta is low. However, this Letter demonstrates that the ions can be heated by Alfvén waves via nonresonant nonlinear interaction. Contrary to t...
متن کاملObservation of fast stochastic ion heating by drift waves.
Anomalously fast ion heating has been observed in the Caltech Encore tokamak [ Phys. Rev. Lett. 59, 1436 ( 1987) 1, with the use of laser-induced fluorescence. This heating was found to be independent of electron temperature, but was well correlated with the presence of largeamplitude drift-Alfven waves. Evidence is presented that suggests that the heating is stochastic and occurs when the ion ...
متن کاملIon stochastic heating by obliquely propagating magnetosonic waves
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متن کاملModulational instability of dust ion acoustic waves in astrophysical dusty plasmas with non thermal electrons
Propagation of dust ion acoustic waves in plasmas composed of nonthermal distributed electrons and stationary dust particles is investigated. Nonlinear Schrdinger equation is derived to describe small amplitude waves, using the reduction perturbation technique. Modulation instability of dust ion acoustic waves is analysed for this system. Parametric investigation indicates that growth rate of...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 1998
ISSN: 0992-7689
DOI: 10.1007/s005850050611