Electron Acceleration by Nonlinear High Frequency Waves in Weakly Magnetized Plasmas

Autor:	Jan Trulsen, O Skjæraasen, Hans Pécseli
Rok vydání:	1998
Předmět:	Physics Plasma Electron Condensed Matter Physics Atomic and Molecular Physics and Optics Magnetic field Computational physics Particle acceleration Nonlinear system Acceleration Amplitude Periodic boundary conditions Atomic physics Mathematical Physics
Zdroj:	Physica Scripta. 58:405-416
ISSN:	1402-4896 0031-8949
DOI:	10.1088/0031-8949/58/4/020
Popis:	The evolution of nonlinear electron plasma waves in weakly magnetized plasmas is studied numerically. The analysis is based on an electrostatic fluid model where the principal waves are assumed to propagate along the magnetic field lines. Numerical results using a spectral method with periodic boundary conditions demonstrate quasi-collapsing solutions for localized initial conditions with sufficiently high amplitude. For smaller initial amplitudes quasi-recurrent variations are found, which have not been treated previously. The emphasis of the study is placed on an investigation of the acceleration of electrons by the high-frequency waves. This problem is analyzed using the numerically obtained wave-field as an input for a code where particles are traced in space and time. It is found that electrons can gain significant energy in one part of the wave-packet and loose this energy again in another part, without the net particle acceleration necessarily being significant.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::22ed75056347c275c9ed348a916ea069 https://doi.org/10.1088/0031-8949/58/4/020 Zobrazit plný text záznamu