Magnetized Electron-ion Plasma Research Articles

Neutrino plasma physics

Collective processes involving neutrinos in unmagnetized and magnetized electron–ion plasmas are discussed. It is shown that the ponderomotive force of the neutrinos can create inhomogeneities and magnetic fields. The nonlinear coupling between the neutrinos and the plasma is attributed to the weak Fermi interaction force. The relevance of our investigation to the inhomogeneities and the primordial magnetic fields in the early universe, as well as to the anomalous absorption of neutrino energy and to the origin of super strong magnetic fields in supernovae explosions is discussed.

Hénon-Heiles Hamiltonian for coupled upper-hybrid and magnetoacoustic waves in magnetized plasmas

We show that the coupled mode equations for the stationary propagation of upper-hybrid and magnetoacoustic waves in magnetized electron-ion plasmas with negative group dispersion can be exactly derived from the generalized Hénon-Heiles Hamiltonian. The parameter regimes for the integrable cases of the coupled mode equations have been explicitly obtained. For positive group dispersion of the upper-hybrid waves, the relevant governing equations lead to a novel Hamiltonian where the kinetic energy is not positive definite.

Electron-temperature-gradient drift wave instabilities in magnetized electron–ion plasmas

A general local dispersion relation is derived for the circulating electron-temperature-gradient-driven drift waves in an inhomogeneous magnetized electron–ion plasma. By taking specific limits, two new instabilities are shown to exist. The resulting quasilinear electron energy and particle fluxes are also obtained.

Hydrodynamic action functional and absorption of electromagnetic waves in plasma

The path integration method is used to study the absorption of waves in plasma. The absorption is considered of longitudinal electromagnetic waves as a consequence of scattering on the transverse waves, which requires the introduction of an integration with respect to a supplementary field of the vector potential. The scattering on the transverse waves becomes the determining one for a one-component plasma in the long wavelength limit. The hydrodynamic action functional is constructed for a magnetized electron-ion plasma by the method of successive integration, first with respect to “fast” fields and, next, with respect to “slow” fields. The absorption of the longitudinal waves is computed with the aid of this functional. The domains of frequencies of the order of the plasma frequency and of the order of the cyclotron frequency are considered. In comparison with the case of a free plasma, here the Coulomb logarithm is varied.