David Newman

TL;DR: For example, NASA's magnetospheric multiscale (MMS) mission has found direct evidence for electron demagnetization and acceleration at sites along the sunward boundary of Earth's magnetosphere where the interplanetary magnetic field reconnects with the terrestrial magnetic field as discussed by the authors.

TL;DR: In this article, the evolution of two counter-streaming electron beams is shown by means of 2D kinetic simulations to lead to electron distributions and coherent localized bipolar plasma wave structures with features similar to those measured by the FAST satellite in the auroral ionosphere.

TL;DR: Direct measurements of parallel electric fields related to particle acceleration in a collisionless space plasma are reported, accompanied by intense electrostatic waves and nonlinear structures interpreted as electron phase-space holes.

TL;DR: Kinetic 1D simulations reveal that a weak density depression in a current-carrying plasma can lead to the formation of a strong potential ramp (double layer) and the ramp and plasma turbulence it creates share many features with recent particle and field measurements in the auroral ionosphere.

TL;DR: In this paper, the authors observed parallel electric fields with amplitudes reaching nearly 1 V/m and are confined to a thin layer of approximately 10 Debye lengths, where the structures are moving at roughly the ion acoustic speed in the direction of the accelerated electrons, i.e., anti-earthward.