Waves Generated by Electron Beam in a Crater-Shaped Flux Rope

Whistler Waves Emitted by a Thin Modulated Electron Beam

The theory of whistler wave interaction with a modulated electron beam of finite radius, injected parallel to the magnetic field in an unbounded space plasma is considered The study is done in the case of sheared whistlers interacting with the thin beam, when the parallel wave number is very small compared to the perpendicular one. The electromagnetic fields inside and outside the beam are dete...

Reconnecting flux-rope dynamo.

We develop a model of the fluctuation dynamo in which the magnetic field is confined to thin flux ropes advected by a multiscale model of turbulence. Magnetic dissipation occurs only via reconnection of the flux ropes. This model can be viewed as an implementation of the asymptotic limit R_{m}-->infinity for a continuous magnetic field, where magnetic dissipation is strongly localized to small ...

Long-duration magnetic clouds: a comparison of analyses using torus- and cylinder-shaped flux rope models

We identified 17 magnetic clouds (MCs) with durations longer than 30 h, surveying the solar wind data obtained by the WIND and ACE spacecraft during 10 years from 1995 through 2004. Then, the magnetic field structures of these 17 MCs were analyzed by the technique of the least-squares fitting to force-free flux rope models. The analysis was made with both the cylinder and torus models when poss...

Etching with Electron Beam Generated Plasmas

Electron Beam Generated Solitary Structures in a Nonuniform Plasma System

Recent observations by the FAST satellite have identified numerous occurrences in the downward auroral current region of fast solitary structures with a characteristic size of a few local Debye lengths. We utilize a 2.5D electrostatic particle-in-cell code to investigate the generation of such structures by the interaction of narrow energetic electron beams with a gravitationally-bound exponent...