Investigation of intermittent magnetic flux in the auroral zones with kilometer radiation (AKR)

Abstract

On the basis of the nonlinear equations for self-generated magnetic fields, it is numerically shown that the magnetic fields self-generated are instable and may collapse, resulting in spatially highly intermittent flux fragment. Numerical results show that the enhanced magnetic flux has a strength about up to 10−2 Gauss in range about around 250–350 km in auroral zones with kilometric radiation (AKR), which correspond to estimated values in both the strength and characteristic scale by Mckean et al. [J. Geophys. Res. [Oceans] 96, 21055 (1991)].

Kinetic Modeling of Self‐Generated Magnetic Fields by Transverse Plasmons in the Relativistic Regime

“…As far as our knowledge goes the laser irradiation, the transverse plasmons near the critical density surface, just is the source for the generation of the magnetic fields [11,12] , as is often the case in astrophysical application to generation of intermittent magnetic fields [13][14][15]. Qualitative understanding of the excitation of magnetic fields by electromagnetic oscillations is rather straightforward: low-frequency nonlinear plasma currents could be excited by the high-frequency oscillation via the wave-wave and wave-particle interactions; at the same time, the currents give rise to a magnetic field.…”

Kinetic theory of transverse plasmons in pair plasmas

“…In order to show the temporal evolution of transverse plasmons in pair plasmas schematically, (2.32) is solved numerically in two dimensions with three field components under the assumption that the envelope of transverse field is independent of z. The initial condition is given as [24] E(ξ, 0) = E 0 sin 2πy…”