[1] A quantitative analysis is presented of the resonant scattering of plasma sheet electrons ( 100 eV–20 keV) at L = 6 due to resonant interactions with whistler-mode chorus. Using wave parameters modeled from observations under geomagnetically disturbed conditions, it is demonstrated that the rate of pitch angle scattering can exceed the level of strong diffusion over a broad energy range (20...

In 2001, the DEMETER micro-satellite will be launched to perform Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions. Its main scientific objective is related to the investigation of the ionospheric perturbations due to the seismic and volcanic activity. A system allowing an onboard identification and characterization of spatially and temporally coherent structures assoc...

Using the Parker Solar Probe FIELDS bandpass filter data and SWEAP electron from Encounters 1 through 9, we show statistical properties of narrowband whistlers ~16 Rs to ~130 Rs, compare wave occurrence including beta, temperature anisotropy heat flux. Whistlers are very rarely observed inside ~28 (~0.13 au). Outside 28 they occur within a narrow range parallel beta ~1 10, with beta-heat flux c...

Whistler-mode chorus consists of intense electromagnetic wave packets generated by a nonlinear mechanism involving wave-particle interactions. Chorus wave packets are discrete frequency-time structures in a frequency range from a few hundreds of Hz to several kHz changing their frequency on a time scale from a few tenths of seconds to a few seconds. The source region of chorus emissions is loca...

This paper presents two time-scale pitch-scale modification techniques to be used in speech synthesis systems. They have been applied to Microsoft’s Whistler system, which is based on concatenative synthesis. Both methods are based on a sourcefilter model, one of them using LPC parameters and the other one using cepstral parameters. The proposed methods achieve high quality prosody modification...

We study a dissipative dynamical system that models a parametric instability in a plasma. This instability is due to the interaction of a whistler with the ion acoustic wave and a plasma oscillation near the lower hybrid resonance. The amplitude of these three oscillations obey a three-dimensional system of ordinary differential equations which exhibits chaos for certain parameter values. By us...

The observed steep kinetic scale turbulence spectrum in the solar wind raises the question of how that turbulence originates. Observations of keV energetic electrons during solar quiet time suggest them as a possible source of free energy to drive kinetic turbulence. Using particle-in-cell simulations, we explore how the free energy released by an electron two-stream instability drives Weibel-l...

Abstract Shock waves are sites of intense plasma heating and charged particle acceleration. In collisionless solar wind plasmas, such acceleration is attributed to shock drift or Fermi but also wave–particle resonant interactions. We examine the latter for case electrons interacting with one most commonly observed wave modes in environments, whistler mode. Such particularly dynamic, localized r...