Neeraj Jain

Effect of guide field on three-dimensional electron shear flow instabilities in electron current sheets

We examine the effect of an external guide field and current sheet thickness on the growth rates and nature of three dimensional unstable modes of an electron current sheet driven by electron shear flow. The growth rate of the fastest growing mode drops rapidly with current sheet thickness but increases slowly with the strength of the guide field. The fastest growing mode is tearing type only for thin current sheets (half thickness

Three dimensional instabilities of an electron scale current sheet in collisionless magnetic reconnection

approx d_e

Nonlinear electron-magnetohydrodynamic simulations of three dimensional current shear instability

, where

Positron Acceleration by Plasma Wakefields Driven by a Hollow Electron Beam.

d_e=c/omega_{pe}

Nonlinear evolution of three-dimensional instabilities of thin and thick electron scale current sheets: Plasmoid formation and current filamentation

is electron inertial length) and zero guide field. For finite guide field or thicker current sheets, fastest growing mode is non-tearing type. However growth rates of the fastest 2-D tearing mode and 3-D non-tearing mode are comparable for thin current sheets (

Evolution of electron current sheets in collisionless magnetic reconnection

d_e <

Plasma wakefield acceleration studies using the quasi-static code WAKE

half thickness

Kinetic Simulations of Electron Acceleration at Mercury

< 2,d_e

Nonlinear evolution of electron shear flow instabilities in the presence of an external guide magnetic field

) and small guide field (of the order of the asymptotic value of the component of magnetic field supporting electron current sheet). It is shown that the general mode resonance conditions for electron-magnetohydrodynamic (EMHD) and magnetohydrodynamic (MHD) tearing modes depend on the effective dissipation mechanism (electron inertia and resistivity in cases of EMHD and MHD, respectively). The usual tearing mode resonance condition (

Spreading of electron scale magnetic reconnection with a wave number dependent speed due to the propagation of dispersive waves

mathbf{k}.mathbf{B}_0=0